Add kalender column rename from eindeutige_gruppen_id to eindeutige_kalender_gruppen_id

# Conflicts:
#	public/js/components/Calendar/Base/DragAndDrop.js
#	public/js/components/Calendar/Base/Grid/Line.js
#	public/js/composables/EventLoader.js

application/config/Events.php

@@ -33,5 +33,27 @@ Events::on('loadRenderers', function ($renderers) {
 	);
 });
 
+//Tempus Renderers:
+Events::on('loadTempusRenderers', function ($renderers) {
+	$fhc_core_renderers =& $renderers();
+	$fhc_core_renderers["reservierung"] = array(
+		'calendarEvent' => absoluteJsImportUrl('public/js/components/Tempus/Renderer/Reservierungen/calendarEvent.js'),
+		'modalTitle' => absoluteJsImportUrl('public/js/components/Tempus/Renderer/Reservierungen/modalTitle.js'),
+		'modalContent' => absoluteJsImportUrl('public/js/components/Tempus/Renderer/Reservierungen/modalContent.js'),
+		'calendarEventStyles' => APP_ROOT . 'public/css/Cis4/CoreCalendarEvents.css'
+	);
+});
+
+Events::on('loadTempusRenderers', function ($renderers) {
+	$fhc_core_renderers =& $renderers();
+	$fhc_core_renderers["lehreinheit"] = array(
+		'calendarEvent' => absoluteJsImportUrl('public/js/components/Tempus/Renderer/Lehreinheit/calendarEvent.js'),
+		'modalTitle' => absoluteJsImportUrl('public/js/components/Tempus/Renderer/Lehreinheit/modalTitle.js'),
+		'modalContent' => absoluteJsImportUrl('public/js/components/Tempus/Renderer/Lehreinheit/modalContent.js'),
+		'calendarEventStyles' => APP_ROOT . 'public/css/Cis4/CoreCalendarEvents.css'
+	);
+});
+
+
 
 

application/config/abgabe.php

@@ -29,7 +29,7 @@ $config['ALLOWED_NOTEN_ABGABETOOL'] = [10, 14]; // tbl_note pk
 // benotete projektarbeiten sperren weitere terminanlage & bearbeitung, diese noten sind ausnahmen dieser Regel
 // wie zB "Nicht beurteilt" & "Noch nicht eingetragen"
 $config['NONFINAL_NOTEN_ABGABETOOL'] = [9];
-$config['beurteilung_link_fallback'] = 'addons/fhtw/content/projektbeurteilung/projektbeurteilungDocumentExport.php?projektarbeit_id=?&betreuerart_kurzbz=?&person_id=?';
+$config['beurteilung_link_fallback'] = 'cis/private/lehre/projektbeurteilungDocumentExport.php?projektarbeit_id=?&betreuerart_kurzbz=?&person_id=?';
 
 $config['PROJEKTARBEITSBEURTEILUNG_MAIL_BASELINK_ERSTBEGUTACHTER'] = 'index.ci.php/extensions/FHC-Core-Projektarbeitsbeurteilung/ProjektarbeitsbeurteilungErstbegutachter';
 $config['PROJEKTARBEITSBEURTEILUNG_MAIL_BASELINK_ZWEITBEGUTACHTER'] = 'index.ci.php/extensions/FHC-Core-Projektarbeitsbeurteilung/ProjektarbeitsbeurteilungErstbegutachter';
@@ -38,8 +38,19 @@ $config['SIGNATUR_CHECK_PAABGABETYPEN'] = ['end'];
 
 // to be used as "https://moodle.technikum-wien.at/course/view.php?idnumber=dl{$stg_kz}" for stg specific moodle routing
 $config['STG_MOODLE_LINK'] = 'https://moodle.technikum-wien.at/course/view.php?idnumber=dl';
+// TODO: check if these links change if the file changes and how to better retrieve the link?
+$config['SIGNATUR_INFO_LINK_GERMAN'] = 'https://cis.technikum-wien.at/cms/dms.php?id=214779'; 
+$config['SIGNATUR_INFO_LINK_ENGLISH'] = 'https://cis.technikum-wien.at/cms/dms.php?id=264256';
 
 $config['ASSISTENZ_SAMMELMAIL_BUTTON_STUDENT'] = true;
 $config['ASSISTENZ_SAMMELMAIL_BUTTON_BETREUER'] = true;
 
 $config['BETREUER_SAMMELMAIL_BUTTON_STUDENT'] = true;
+
+$config['MULTIEDIT_TABLE'] = true;
+
+$config['STUDENT_EDIT_PROJEKTARBEIT_TITLE'] = true;
+
+$config['CONFETTI_ON_ENDUPLOAD'] = true;
+
+

application/config/navigation.php

@@ -208,7 +208,14 @@ $config['navigation_header'] = array(
                     'expand' => true,
                     'sort' => 30,
                     'requiredPermissions' => 'lehre/anrechnungszeitfenster:rw'
-                )
+                ),
+				'dashboardadmin' => array(
+					'link' => site_url('dashboard/Admin'),
+					'description' => 'Dashboard Admin',
+					'expand' => true,
+					'sort' => 40,
+					'requiredPermissions' => 'dashboard/admin:r'
+				)
 			)
 		)
 	)

application/config/routes.php

@@ -64,6 +64,9 @@ $route['api/v1/system/[S|s]prache/(:any)'] = 'api/v1/system/sprache2/$1';
 $route['Cis/LvPlan/.*'] = 'Cis/LvPlan/index/$1';
 $route['Cis/MyLvPlan/.*'] = 'Cis/MyLvPlan/index/$1';
 $route['Cis/MyLv/.*'] = 'Cis/MyLv/index/$1';
+$route['Cis/OtherLvPlan/.*'] = 'Cis/OtherLvPlan/index/$1';
+//Route for LV Plan Stg/Semester/Verband/Gruppe
+$route['Cis/StgOrgLvPlan/.*'] = 'Cis/StgOrgLvPlan/index/$1';
 
 $route['Abgabetool/Assistenz'] = 'Cis/Abgabetool/Assistenz';
 $route['Abgabetool/Assistenz/(:any)'] = 'Cis/Abgabetool/Assistenz/$1';
@@ -119,9 +122,21 @@ $route['api/frontend/v1/stv/[sS]tudents/([WS]S[0-9]{4})/prestudent/(:num)'] = 'a
 // // (studiensemester_kurzbz)/person/(person_id)
 $route['api/frontend/v1/stv/[sS]tudents/([WS]S[0-9]{4})/person/(:num)'] = 'api/frontend/v1/stv/Students/getPerson/$1/$2';
 
+
+$route['lvplan/caldav'] = 'LvPlanCalDAV';
+$route['lvplan/caldav/.*'] = 'LvPlanCalDAV';
+$route['lvplan/ical/subscription/google'] = 'LvPlanICALSubscription';
+$route['lvplan/ical/download'] = 'LvPlanICALDownload';
+$route['lvplan/csv/download'] = 'LvPlanCSVDownload';
+$route['lvplan/excel/download'] = 'LvPlanExcelDownload';
+$route['lvplan/html/preview'] = 'LvPlanHTMLPreview';
+$route['lvplan/html/detail'] = 'LvPlanHTMLDetail';
+
 // load routes from extensions, also look for environment-specific configs
 $subdirs = ['application/config/extensions', 'application/config/' . ENVIRONMENT . '/extensions'];
 
+$route['api/frontend/v1/tempus/Tags/getTagsByCalendar/(:num)'] = 'api/frontend/v1/tempus/Tags/getTagsByCalendar/$1';
+
 foreach($subdirs as $subdir)
 {
 	if(is_dir($subdir))

application/config/searchcis.php

@@ -22,8 +22,9 @@ unset($config['student']['searchfields']['email']);
 unset($config['student']['searchfields']['tel']);
 $config['student']['resultfields'] = [
 	"s.student_uid AS uid",
-	"s.matrikelnr",
+	"s.matrikelnr AS personenkennzeichen",
 	"p.person_id",
+	"p.matr_nr AS matrikelnummer",
 	"(p.vorname || ' ' || p.nachname) AS name",
 	"ARRAY[s.student_uid || '@' || '" . DOMAIN . "'] AS email",
 	"CASE

application/config/studierendenantrag.php

@@ -168,3 +168,32 @@ $config['stgkz_blacklist_wiederholung'] = [];
  * @var array           An array of noten ids
  */
 $config['note_blacklist_wiederholung'] = [];
+
+/**
+ *  Enable/disable the Abmeldung StG process
+ *
+ * @var bool
+ */
+$config['abmeldung_stg_enabled'] = true;
+
+/**
+ *  Enable/disable the Abmeldung process
+ *
+ * @var bool
+ */
+$config['abmeldung_enabled'] = true;
+
+/**
+ *  Enable/disable the Unterbrecher process
+ *
+ * @var bool
+ */
+$config['unterbrechung_enabled'] = true;
+
+/**
+ *  Enable/disable the Wiederholer process
+ *
+ * @var bool
+ */
+$config['wiederholung_enabled'] = true;
+

application/config/tempus.php

@@ -0,0 +1,12 @@
+<?php
+
+$config['send_update_mails'] = false;
+$config['calendar_start'] = 7;
+$config['calendar_end'] = 23;
+
+
+$config['tempus_tags'] = [
+	'prioone' => ['readonly' => false],
+	'priotwo' => ['readonly' => true],
+	'hinweis' => ['readonly' => false],
+];

application/controllers/Cis/Abgabetool.php

@@ -31,12 +31,8 @@ class Abgabetool extends Auth_Controller
 	{
 		// TODO: routing from index based on berechtigung?
 
-		$viewData = array(
-			'uid'=>getAuthUID(),
-		);
-
 		if(defined('CIS4') && CIS4) {
-			$this->load->view('CisRouterView/CisRouterView.php', ['viewData' => $viewData, 'route' => 'Abgabetool']);
+			$this->load->view('CisRouterView/CisRouterView.php', ['route' => 'Abgabetool']);
 		} else {
 			$this->load->view('Cis/Abgabetool.php', ['uid' => getAuthUID(), 'route' => 'Abgabetool']);
 		}
@@ -44,12 +40,8 @@ class Abgabetool extends Auth_Controller
 
 	public function Student($student_uid_prop = '')
 	{
-		$viewData = array(
-			'uid'=>getAuthUID(),
-		);
-		
 		if(defined('CIS4') && CIS4) {
-			$this->load->view('CisRouterView/CisRouterView.php', ['viewData' => $viewData, 'route' => 'AbgabetoolStudent']);
+			$this->load->view('CisRouterView/CisRouterView.php', ['route' => 'AbgabetoolStudent']);
 		} else {
 			$this->load->view('Cis/Abgabetool.php', ['uid' => getAuthUID(), 'route' => 'AbgabetoolStudent', 'student_uid_prop' => $student_uid_prop]);
 		}
@@ -57,12 +49,8 @@ class Abgabetool extends Auth_Controller
 
 	public function Mitarbeiter()
 	{
-		$viewData = array(
-			'uid'=>getAuthUID(),
-		);
-
 		if(defined('CIS4') && CIS4) {
-			$this->load->view('CisRouterView/CisRouterView.php', ['viewData' => $viewData, 'route' => 'AbgabetoolMitarbeiter']);
+			$this->load->view('CisRouterView/CisRouterView.php', ['route' => 'AbgabetoolMitarbeiter']);
 		} else {
 			$this->load->view('Cis/Abgabetool.php', ['uid' => getAuthUID(), 'route' => 'AbgabetoolMitarbeiter']);
 		}
@@ -70,13 +58,8 @@ class Abgabetool extends Auth_Controller
 
 	public function Assistenz($stg_kz_prop = '')
 	{
-		
-		$viewData = array(
-			'uid'=>getAuthUID(),
-		);
-
 		if(defined('CIS4') && CIS4) {
-			$this->load->view('CisRouterView/CisRouterView.php', ['viewData' => $viewData, 'route' => 'AbgabetoolAssistenz']);
+			$this->load->view('CisRouterView/CisRouterView.php', ['route' => 'AbgabetoolAssistenz']);
 		} else {
 			$this->load->view('Cis/Abgabetool.php', ['uid' => getAuthUID(), 'route' => 'AbgabetoolAssistenz', 'stg_kz_prop' => $stg_kz_prop]);
 		}
@@ -84,12 +67,8 @@ class Abgabetool extends Auth_Controller
 	
 	public function Deadlines()
 	{
-		$viewData = array(
-			'uid'=>getAuthUID(),
-		);
-
 		if(defined('CIS4') && CIS4) {
-			$this->load->view('CisRouterView/CisRouterView.php', ['viewData' => $viewData, 'route' => 'DeadlinesOverview']);
+			$this->load->view('CisRouterView/CisRouterView.php', ['route' => 'DeadlinesOverview']);
 		} else {
 			$this->load->view('Cis/Abgabetool.php', ['uid' => getAuthUID(), 'route' => 'DeadlinesOverview']);
 		}

application/controllers/Cis/Auth.php

@@ -40,7 +40,7 @@ class Auth extends FHC_Controller
 
 		if ($this->form_validation->run())
 		{
-			redirect($this->authlib->getLandingPage('/CisVue/Dashboard'));
+			redirect($this->authlib->getLandingPage('/Cis4'));
 		}
 		else
 		{

application/controllers/Cis/LvPlan.php

@@ -28,12 +28,6 @@ class LvPlan extends Auth_Controller
 	 */
 	public function index()
 	{
-		
-		$viewData = array(
-			'uid'=>getAuthUID(),
-			'timezone' => $this->config->item('timezone')
-		);
-		
-		$this->load->view('CisRouterView/CisRouterView.php', ['viewData' => $viewData, 'route' => 'LvPlan']);
+		$this->load->view('CisRouterView/CisRouterView.php', ['route' => 'LvPlan']);
 	}
 }

application/controllers/Cis/MyLv.php

@@ -26,11 +26,6 @@ class MyLv extends Auth_Controller
 	 */
 	public function index()
 	{
-		
-		$viewData = array(
-
-		);
-
-		$this->load->view('CisRouterView/CisRouterView.php', ['viewData' => $viewData, 'route' => 'MyLv']);
+		$this->load->view('CisRouterView/CisRouterView.php', ['route' => 'MyLv']);
 	}
 }

application/controllers/Cis/MyLvPlan.php

@@ -27,13 +27,7 @@ class MyLvPlan extends Auth_Controller
 	 * @return void
 	 */
 	public function index()
-	{
-		
-		$viewData = array(
-			'uid'=>getAuthUID(),
-			'timezone' => $this->config->item('timezone')
-		);
-		
-		$this->load->view('CisRouterView/CisRouterView.php', ['viewData' => $viewData, 'route' => 'MyLvPlan']);
+	{		
+		$this->load->view('CisRouterView/CisRouterView.php', ['route' => 'MyLvPlan']);
 	}
 }

application/controllers/Cis/OtherLvPlan.php

@@ -0,0 +1,34 @@
+<?php
+
+if (!defined('BASEPATH'))
+    exit('No direct script access allowed');
+
+/**
+ *
+ */
+class OtherLvPlan extends Auth_Controller
+{
+    /**
+     * Constructor
+     */
+    public function __construct()
+    {
+        parent::__construct([
+            'index' => ['basis/other_lv_plan:r']
+        ]);
+
+        // Load Config
+        $this->load->config('calendar');
+    }
+
+    // -----------------------------------------------------------------------------------------------------------------
+    // Public methods
+
+    /**
+     * @return void
+     */
+    public function index()
+    {
+        $this->load->view('CisRouterView/CisRouterView.php', ['route' => 'OtherLvPlan']);
+    }
+}

application/controllers/Cis/Profil.php

@@ -55,15 +55,7 @@ class Profil extends Auth_Controller
 	 */
 	public function index()
 	{
-		
-		$this->load->library('ProfilLib');
-		$profil_data = $this->profillib->getView(getAuthUID());
-		$profil_data = hasData($profil_data) ? getData($profil_data) : null;
-		$viewData = array(
-			'editable'=>true,
-			'profil_data' => $profil_data,
-		);
-		$this->load->view('CisRouterView/CisRouterView.php',['viewData' => $viewData, 'route' => 'profilIndex']);
+		$this->load->view('CisRouterView/CisRouterView.php', ['route' => 'profilIndex']);
 	}
 
 	/**
@@ -73,23 +65,13 @@ class Profil extends Auth_Controller
 	 */
 	public function View($uid)
 	{
-		$this->load->library('ProfilLib');
-		$profil_data = $this->profillib->getView($uid);
-		$profil_data = hasData($profil_data) ? getData($profil_data) : null;
-		$viewData = array (
-			'uid' => $uid,
-			'profil_data'=>$profil_data,
-		);
-		if($uid == getAuthUID()){
-			$viewData['editable'] = true;
-		}
-		$this->load->view('CisRouterView/CisRouterView.php',['viewData' => $viewData, 'route' => 'profilViewUid']);
+		$this->load->view('CisRouterView/CisRouterView.php', ['route' => 'profilViewUid']);
 	}
 
 	/**
-	 * checks whether a specific userID is a mitarbeiter or not (foreword declaration of the function isMitarbeiter in Mitarbeiter_model.php)
+	 * checks whether a specific userID is a student or not (foreword declaration of the function isStudent in Student_model.php)
 	 * @access public
-	 * @param  $uid the userID used to check if it is a mitarbeiter
+	 * @param  $uid the userID used to check if it is a student
 	 * @return boolean 
 	 */
 	public function isStudent($uid)
@@ -119,7 +101,7 @@ class Profil extends Auth_Controller
 	}
 
 	/**
-	 * gets the adressen that are marked as zustell from the currenlty logged in user
+	 * gets the adressen that are marked as zustell from the currently logged in user
 	 * @access public
 	 * @return array a list of adresse_id's 
 	 */
@@ -262,23 +244,23 @@ class Profil extends Auth_Controller
 		$this->GemeindeModel->addDistinct();
 		$this->GemeindeModel->addSelect(["name"]);
 		if ($nation == "A") {
-				if (isset($zip) && $zip > 999 && $zip < 32000) {
+			if (isset($zip) && $zip > 999 && $zip < 32000) {
 
-						$gemeinde_res = $this->GemeindeModel->loadWhere(['plz' => $zip]);
-						if (isError($gemeinde_res)) {
-								show_error("error while trying to query bis.tbl_gemeinde");
-						}
-						$gemeinde_res = hasData($gemeinde_res) ? getData($gemeinde_res) : null;
-						$gemeinde_res = array_map(function ($obj) {
-								return $obj->name;
-						}, $gemeinde_res);
-						echo json_encode($gemeinde_res);
-
-				} else {
-						echo json_encode(error("ortschaftskennziffer code was not valid"));
+				$gemeinde_res = $this->GemeindeModel->loadWhere(['plz' => $zip]);
+				if (isError($gemeinde_res)) {
+					show_error("error while trying to query bis.tbl_gemeinde");
 				}
+				$gemeinde_res = hasData($gemeinde_res) ? getData($gemeinde_res) : null;
+				$gemeinde_res = array_map(function ($obj) {
+					return $obj->name;
+				}, $gemeinde_res);
+				echo json_encode($gemeinde_res);
+
+			} else {
+				echo json_encode(error("ortschaftskennziffer code was not valid"));
+			}
 		} else {
-				echo json_encode(error("Nation was not 'A' (Austria)"));
+			echo json_encode(error("Nation was not 'A' (Austria)"));
 		}
 	}
 
@@ -750,6 +732,4 @@ class Profil extends Auth_Controller
 		$zutrittskarte_ausgegebenam = str_replace("-", ".", $zutrittskarte_ausgegebenam);
 		return $zutrittskarte_ausgegebenam;
 	}
-
-
 }

application/controllers/Cis/Raumsuche.php

@@ -25,11 +25,6 @@ class Raumsuche extends Auth_Controller
 	 */
 	public function index()
 	{
-
-		$viewData = array(
-			'uid'=>getAuthUID(),
-		);
-
-		$this->load->view('CisRouterView/CisRouterView.php', ['viewData' => $viewData, 'route' => 'Raumsuche']);
+		$this->load->view('CisRouterView/CisRouterView.php', ['route' => 'Raumsuche']);
 	}
 }

application/controllers/Cis/StgOrgLvPlan.php

@@ -0,0 +1,33 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ *
+ */
+class StgOrgLvPlan extends Auth_Controller
+{
+	/**
+	 * Constructor
+	 */
+	public function __construct()
+	{
+		parent::__construct([
+			'index' => ['basis/cis:r']
+		]);
+
+		// Load Config
+		$this->load->config('calendar');
+	}
+
+	// -----------------------------------------------------------------------------------------------------------------
+	// Public methods
+
+	/**
+	 * @return void
+	 */
+	public function index()
+	{
+		$this->load->view('CisRouterView/CisRouterView.php', ['route' => 'StgOrgLvPlan']);
+	}
+}

application/controllers/Cis/Studium.php

@@ -29,10 +29,7 @@ class Studium extends Auth_Controller
 	 */
 	public function index()
 	{
-		$viewData = array(
-
-		);
-		$this->load->view('CisRouterView/CisRouterView.php',['viewData' => $viewData, 'route' => 'studium']);
+		$this->load->view('CisRouterView/CisRouterView.php',['route' => 'studium']);
 	}
 
 

application/controllers/Cis4.php

@@ -1,6 +1,7 @@
 <?php
 
-if (! defined('BASEPATH')) exit('No direct script access allowed');
+if (!defined('BASEPATH'))
+	exit('No direct script access allowed');
 
 /**
  *
@@ -13,9 +14,9 @@ class Cis4 extends Auth_Controller
 	public function __construct()
 	{
 		parent::__construct(
-		    array(
-			'index' => 'basis/cis:r'
-		    )
+			array(
+				'index' => 'basis/cis:r'
+			)
 		);
 
 		// Load Config
@@ -30,16 +31,6 @@ class Cis4 extends Auth_Controller
 	 */
 	public function index()
 	{
-		$this->load->model('person/Person_model', 'PersonModel');
-		$personData = getData($this->PersonModel->getByUid(getAuthUID()))[0];
-		
-		$viewData = array(
-			'uid' => getAuthUID(),
-			'name' => $personData->vorname,
-			'person_id' => $personData->person_id,
-			'timezone' => $this->config->item('timezone')
-		);
-
-		$this->load->view('CisRouterView/CisRouterView.php', ['viewData' => $viewData, 'route' => 'FhcDashboard']);
+		$this->load->view('CisRouterView/CisRouterView.php', ['route' => 'FhcDashboard']);
 	}
 }

application/controllers/CisVue/Dashboard.php

@@ -1,43 +0,0 @@
-<?php
-
-if (! defined('BASEPATH')) exit('No direct script access allowed');
-
-/**
- *
- */
-class Dashboard extends Auth_Controller
-{
-	/**
-	 * Constructor
-	 */
-	public function __construct()
-	{
-		parent::__construct(
-			array(
-				'index' => 'dashboard/benutzer:r'
-			)
-		);
-	}
-
-	// -----------------------------------------------------------------------------------------------------------------
-	// Public methods
-
-	/**
-	 * @return void
-	 */
-	public function index()
-	{
-
-		$this->load->model('person/Person_model','PersonModel');
-		$personData = getData($this->PersonModel->getByUid(getAuthUID()))[0];
-
-		$viewData = array(
-			'uid' => getAuthUID(),
-			'name' => $personData->vorname,
-			'person_id' => $personData->person_id
-		);
-		
-		$this->load->view('CisRouterView/CisRouterView.php', ['viewData' => $viewData]);
-
-	}
-}

application/controllers/LvPlanCSVDownload.php

@@ -0,0 +1,311 @@
+<?php
+
+if (!defined('BASEPATH'))
+	exit('No direct script access allowed');
+
+require_once(FHCPATH.'include/functions.inc.php');
+
+class LvPlanCSVDownload extends Auth_Controller
+{
+	const MAX_DATE_RANGE = 34560000; // 400 days
+
+	/**
+	 * Object initialization.
+	 */
+	public function __construct()
+	{
+		parent::__construct([
+			'index' => ['basis/cis:r']
+		]);
+
+		$this->load->model('person/Benutzer_model', 'BenutzerModel');
+		$this->load->model('ressource/Ort_model', 'OrtModel');
+		$this->load->model('organisation/Studiengang_model', 'StudiengangModel');
+		$this->load->model('organisation/Studiensemester_model', 'StudiensemesterModel');
+		$this->loadPhrases(array('global', 'lehre', 'ui'));
+	}
+
+	/**
+	 * Serves an authenticated CSV file download.
+	 *
+	 * @return void
+	 */
+	public function index()
+	{
+		$type = $this->getType();
+		$uid = getAuthUID();
+		$ortKurzbz = null;
+		$verbandFilters = null;
+		if ($type === 'ort')
+			$ortKurzbz = $this->getRoom();
+		elseif ($type === 'verband')
+			$verbandFilters = $this->getVerbandFilters();
+		else
+		{
+			$uid = $this->getUid();
+			$this->authorizeUid($uid);
+			$this->validateUid($uid);
+		}
+		$target = $this->getTarget();
+		list($begin, $ende) = $this->getDateRange();
+
+		$this->load->library('LvPlanCSVLib');
+		$content = $this->lvplancsvlib->getContent(
+			$uid,
+			$begin,
+			$ende,
+			$type,
+			$target,
+			$ortKurzbz,
+			$verbandFilters
+		);
+
+		$filename = $this->getFilename($begin, $ende, $target);
+
+		$this->output
+			->set_content_type('text/csv', 'UTF-8')
+			->set_header('Content-Disposition: attachment; filename="'.$filename.'"')
+			->set_header('Pragma: public')
+			->set_header('Expires: 0')
+			->set_output($content);
+	}
+
+	/**
+	 * @return string Requested timetable type.
+	 */
+	private function getType()
+	{
+		$type = $this->input->get('type', true);
+
+		if (!in_array($type, array('student', 'lektor', 'ort', 'verband'), true))
+			show_error('Ungueltiger Parameter: type', 400);
+
+		return $type;
+	}
+
+	/**
+	 * @return string Requested user UID.
+	 */
+	private function getUid()
+	{
+		$uid = $this->input->get('pers_uid', true);
+
+		if (!is_string($uid) || $uid === '' || !check_utf8($uid))
+			show_error('Ungueltiger Parameter: pers_uid', 400);
+
+		return $uid;
+	}
+
+	/**
+	 * @return string Requested room identifier.
+	 */
+	private function getRoom()
+	{
+		$ortKurzbz = $this->input->get('ort_kurzbz', true);
+		if (!is_string($ortKurzbz) || $ortKurzbz === '' || !check_utf8($ortKurzbz))
+			show_error('Ungueltiger Parameter: ort_kurzbz', 400);
+
+		$this->OrtModel->addSelect('ort_kurzbz');
+		$room = $this->OrtModel->load($ortKurzbz);
+		if (isError($room))
+			show_error(getError($room), 500);
+		if (!hasData($room))
+			show_error('Ungueltiger Parameter: ort_kurzbz', 400);
+
+		return $ortKurzbz;
+	}
+
+	/**
+	 * @return array Requested Lehrverband filters.
+	 */
+	private function getVerbandFilters()
+	{
+		$stgKz = $this->getInteger('stg_kz', true);
+		$semester = $this->getInteger('sem', false, true);
+		$verband = $this->getOptionalFilter('ver');
+		$gruppe = $this->getOptionalFilter('grp');
+
+		$this->StudiengangModel->addSelect('studiengang_kz');
+		$studiengang = $this->StudiengangModel->load($stgKz);
+		if (isError($studiengang))
+			show_error(getError($studiengang), 500);
+		if (!hasData($studiengang))
+			show_error('Ungueltiger Parameter: stg_kz', 400);
+
+		return array(
+			'stg_kz' => $stgKz,
+			'sem' => $semester,
+			'ver' => $verband,
+			'grp' => $gruppe
+		);
+	}
+
+	private function getInteger($name, $signed, $optional = false)
+	{
+		$value = $this->input->get($name, true);
+		if ($optional && ($value === null || $value === ''))
+			return null;
+
+		$pattern = $signed ? '/^-?\d+$/' : '/^\d+$/';
+		if (!is_string($value) || !preg_match($pattern, $value))
+			show_error('Ungueltiger Parameter: '.$name, 400);
+
+		$integer = filter_var($value, FILTER_VALIDATE_INT);
+		if ($integer === false || (!$signed && $integer < 0))
+			show_error('Ungueltiger Parameter: '.$name, 400);
+
+		return $integer;
+	}
+
+	private function getOptionalFilter($name)
+	{
+		$value = $this->input->get($name, true);
+		if ($value === null || $value === '' || $value === '0')
+			return null;
+		if (!is_string($value)
+			|| !check_utf8($value)
+			|| mb_strlen($value) > 20
+			|| !preg_match('/^[[:alnum:]_-]+$/u', $value))
+		{
+			show_error('Ungueltiger Parameter: '.$name, 400);
+		}
+
+		return $value;
+	}
+
+	/**
+	 * @return string|null Requested CSV target.
+	 */
+	private function getTarget()
+	{
+		$target = $this->input->get('target', true);
+
+		if ($target !== null && $target !== 'outlook')
+			show_error('Ungueltiger Parameter: target', 400);
+
+		return $target;
+	}
+
+	/**
+	 * Validates and expands the requested range to complete weeks.
+	 *
+	 * @return array{0: int, 1: int} Begin and end timestamps.
+	 */
+	private function getDateRange()
+	{
+		$begin = $this->getTimestamp('begin');
+		$ende = $this->getTimestamp('ende');
+
+		if ($ende < $begin)
+			show_error('Ungueltiger Datumsbereich', 400);
+
+		if ($ende - $begin > self::MAX_DATE_RANGE)
+			show_error('Datumsbereich zu gross', 400);
+
+		$begin = strtotime('monday this week', $begin);
+		$ende = strtotime('sunday this week', $ende);
+
+		return array($begin, $ende);
+	}
+
+	/**
+	 * Builds the CSV download filename.
+	 *
+	 * @param int $begin Range start timestamp.
+	 * @param int $ende Range end timestamp.
+	 * @param string|null $target Requested CSV target.
+	 * @return string Filename.
+	 */
+	private function getFilename($begin, $ende, $target)
+	{
+		$studiensemester = $this->getStudiensemester($begin, $ende);
+
+		$filename = $this->p->t('global', 'termine');
+		if ($studiensemester !== null)
+			$filename .= '_'.$studiensemester->studiensemester_kurzbz;
+		$filename .= '-'.date('Ymd');
+		if ($target === 'outlook')
+			$filename .= '_outlook';
+		$filename .= '.csv';
+
+		return $filename;
+	}
+
+	/**
+	 * Gets the study semester covered by the requested date range.
+	 *
+	 * @param int $begin Range start timestamp.
+	 * @param int $ende Range end timestamp.
+	 * @return object|null Study semester, if one overlaps the range.
+	 */
+	private function getStudiensemester($begin, $ende)
+	{
+		$semesterRange = $this->StudiensemesterModel->getByDateRange(
+			date('Y-m-d', $begin),
+			date('Y-m-d', $ende)
+		);
+
+		if (isError($semesterRange) || !hasData($semesterRange))
+			return null;
+
+		$studiensemester = current(getData($semesterRange));
+
+		return $studiensemester;
+	}
+
+	/**
+	 * @param string $name GET parameter name.
+	 * @return int Unix timestamp.
+	 */
+	private function getTimestamp($name)
+	{
+		$value = $this->input->get($name, true);
+
+		if (!is_string($value) || !ctype_digit($value))
+			show_error('Ungueltiger Parameter: '.$name, 400);
+
+		$timestamp = filter_var(
+			$value,
+			FILTER_VALIDATE_INT,
+			array('options' => array('min_range' => 0))
+		);
+
+		if ($timestamp === false)
+			show_error('Ungueltiger Parameter: '.$name, 400);
+
+		return $timestamp;
+	}
+
+	/**
+	 * Ensures access to another user's timetable is explicitly permitted.
+	 *
+	 * @param string $uid Requested user UID.
+	 * @return void
+	 */
+	private function authorizeUid($uid)
+	{
+		if ($uid !== getAuthUID()
+			&& !$this->permissionlib->isBerechtigt('basis/other_lv_plan'))
+		{
+			show_error('Forbidden', 403);
+		}
+	}
+
+	/**
+	 * Ensures the requested user exists.
+	 *
+	 * @param string $uid Requested user UID.
+	 * @return void
+	 */
+	private function validateUid($uid)
+	{
+		$this->BenutzerModel->addSelect('uid');
+		$user = $this->BenutzerModel->load(array($uid));
+
+		if (isError($user))
+			show_error(getError($user), 500);
+
+		if (!hasData($user))
+			show_error('Ungueltiger Parameter: pers_uid', 400);
+	}
+}

application/controllers/LvPlanCalDAV.php

@@ -0,0 +1,58 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ */
+class LvPlanCalDAV extends FHC_Controller
+{
+	/**
+	 * Constructor
+	 */
+	public function __construct()
+	{
+        parent::__construct();
+		$this->load->library('sabredav/SabreDAVAuthLib');
+        $this->load->library('sabredav/SabreDAVCalDAVLib');
+	}
+
+	// -----------------------------------------------------------------------------------------------------------------
+	// Public methods
+	public function index()
+	{
+       
+        $authBackend = new SabreDAVAuthLib();
+        $principalBackend = new SabreDAVACLPrincipalBackend($authBackend);
+        $calendarBackend = new SabreDAVCalDAVBackend($authBackend);
+
+        $tree = array(
+            new \Sabre\CalDAV\Principal\Collection($principalBackend),
+            new \Sabre\CalDAV\CalendarRoot($principalBackend, $calendarBackend)
+        );
+
+        $server = new \Sabre\DAV\Server($tree);
+
+        $baseUri = '/' . implode('/', array_filter([
+            trim(BASE_LOCATION, '/'),
+            trim($this->config->item('index_page'), '/'),
+            'lvplan',
+            'caldav'
+        ]));
+        $server->setBaseUri($baseUri);
+
+        $authBackend->setRealm('SabreDAV');
+        $authPlugin = new \Sabre\DAV\Auth\Plugin($authBackend);
+        $server->addPlugin($authPlugin);
+
+        $caldavPlugin = new \Sabre\CalDAV\Plugin();
+        $server->addPlugin($caldavPlugin);
+
+        $aclPlugin = new \Sabre\DAVACL\Plugin();
+        $server->addPlugin($aclPlugin);
+
+        $browser = new \Sabre\DAV\Browser\Plugin();
+        $server->addPlugin($browser);
+
+        $server->exec();
+	}
+}

application/controllers/LvPlanExcelDownload.php

@@ -0,0 +1,292 @@
+<?php
+
+if (!defined('BASEPATH'))
+	exit('No direct script access allowed');
+
+require_once(FHCPATH.'include/functions.inc.php');
+
+class LvPlanExcelDownload extends Auth_Controller
+{
+	const MAX_DATE_RANGE = 34560000; // 400 days
+
+	/**
+	 * Object initialization.
+	 */
+	public function __construct()
+	{
+		parent::__construct([
+			'index' => ['basis/cis:r']
+		]);
+
+		$this->load->model('person/Benutzer_model', 'BenutzerModel');
+		$this->load->model('ressource/Ort_model', 'OrtModel');
+		$this->load->model('organisation/Studiengang_model', 'StudiengangModel');
+		$this->load->model('organisation/Studiensemester_model', 'StudiensemesterModel');
+		$this->loadPhrases(array('global'));
+	}
+
+	/**
+	 * Serves an authenticated Excel file download.
+	 *
+	 * @return void
+	 */
+	public function index()
+	{
+		$type = $this->getType();
+		$uid = getAuthUID();
+		$ortKurzbz = null;
+		$verbandFilters = null;
+		if ($type === 'ort')
+			$ortKurzbz = $this->getRoom();
+		elseif ($type === 'verband')
+			$verbandFilters = $this->getVerbandFilters();
+		else
+		{
+			$uid = $this->getUid();
+			$this->authorizeUid($uid);
+			$this->validateUid($uid);
+		}
+		list($begin, $ende) = $this->getDateRange();
+
+		$this->load->library('LvPlanExcelLib');
+		$content = $this->lvplanexcellib->getContent(
+			$uid,
+			$begin,
+			$ende,
+			$type,
+			$ortKurzbz,
+			$verbandFilters
+		);
+
+		$filename = $this->getFilename($begin, $ende);
+
+		$this->output
+			->set_content_type('application/vnd.ms-excel')
+			->set_header('Content-Disposition: attachment; filename="'.$filename.'"')
+			->set_header('Pragma: public')
+			->set_header('Expires: 0')
+			->set_output($content);
+	}
+
+	/**
+	 * @return string Requested timetable type.
+	 */
+	private function getType()
+	{
+		$type = $this->input->get('type', true);
+
+		if (!in_array($type, array('student', 'lektor', 'ort', 'verband'), true))
+			show_error('Ungueltiger Parameter: type', 400);
+
+		return $type;
+	}
+
+	/**
+	 * @return string Requested user UID.
+	 */
+	private function getUid()
+	{
+		$uid = $this->input->get('pers_uid', true);
+
+		if (!is_string($uid) || $uid === '' || !check_utf8($uid))
+			show_error('Ungueltiger Parameter: pers_uid', 400);
+
+		return $uid;
+	}
+
+	/**
+	 * @return string Requested room identifier.
+	 */
+	private function getRoom()
+	{
+		$ortKurzbz = $this->input->get('ort_kurzbz', true);
+		if (!is_string($ortKurzbz) || $ortKurzbz === '' || !check_utf8($ortKurzbz))
+			show_error('Ungueltiger Parameter: ort_kurzbz', 400);
+
+		$this->OrtModel->addSelect('ort_kurzbz');
+		$room = $this->OrtModel->load($ortKurzbz);
+		if (isError($room))
+			show_error(getError($room), 500);
+		if (!hasData($room))
+			show_error('Ungueltiger Parameter: ort_kurzbz', 400);
+
+		return $ortKurzbz;
+	}
+
+	/**
+	 * @return array Requested Lehrverband filters.
+	 */
+	private function getVerbandFilters()
+	{
+		$stgKz = $this->getInteger('stg_kz', true);
+		$semester = $this->getInteger('sem', false, true);
+		$verband = $this->getOptionalFilter('ver');
+		$gruppe = $this->getOptionalFilter('grp');
+
+		$this->StudiengangModel->addSelect('studiengang_kz');
+		$studiengang = $this->StudiengangModel->load($stgKz);
+		if (isError($studiengang))
+			show_error(getError($studiengang), 500);
+		if (!hasData($studiengang))
+			show_error('Ungueltiger Parameter: stg_kz', 400);
+
+		return array(
+			'stg_kz' => $stgKz,
+			'sem' => $semester,
+			'ver' => $verband,
+			'grp' => $gruppe
+		);
+	}
+
+	private function getInteger($name, $signed, $optional = false)
+	{
+		$value = $this->input->get($name, true);
+		if ($optional && ($value === null || $value === ''))
+			return null;
+
+		$pattern = $signed ? '/^-?\d+$/' : '/^\d+$/';
+		if (!is_string($value) || !preg_match($pattern, $value))
+			show_error('Ungueltiger Parameter: '.$name, 400);
+
+		$integer = filter_var($value, FILTER_VALIDATE_INT);
+		if ($integer === false || (!$signed && $integer < 0))
+			show_error('Ungueltiger Parameter: '.$name, 400);
+
+		return $integer;
+	}
+
+	private function getOptionalFilter($name)
+	{
+		$value = $this->input->get($name, true);
+		if ($value === null || $value === '' || $value === '0')
+			return null;
+		if (!is_string($value)
+			|| !check_utf8($value)
+			|| mb_strlen($value) > 20
+			|| !preg_match('/^[[:alnum:]_-]+$/u', $value))
+		{
+			show_error('Ungueltiger Parameter: '.$name, 400);
+		}
+
+		return $value;
+	}
+
+	/**
+	 * Validates and expands the requested range to complete weeks.
+	 *
+	 * @return array{0: int, 1: int} Begin and end timestamps.
+	 */
+	private function getDateRange()
+	{
+		$begin = $this->getTimestamp('begin');
+		$ende = $this->getTimestamp('ende');
+
+		if ($ende < $begin)
+			show_error('Ungueltiger Datumsbereich', 400);
+
+		if ($ende - $begin > self::MAX_DATE_RANGE)
+			show_error('Datumsbereich zu gross', 400);
+
+		$begin = strtotime('monday this week', $begin);
+		$ende = strtotime('sunday this week', $ende);
+
+		return array($begin, $ende);
+	}
+
+	/**
+	 * Builds the Excel download filename.
+	 *
+	 * @param int $begin Range start timestamp.
+	 * @param int $ende Range end timestamp.
+	 * @return string Filename.
+	 */
+	private function getFilename($begin, $ende)
+	{
+		$studiensemester = $this->getStudiensemester($begin, $ende);
+
+		$filename = $this->p->t('global', 'termine');
+		if ($studiensemester !== null)
+			$filename .= '_'.$studiensemester->studiensemester_kurzbz;
+		$filename .= '-'.date('Ymd').'.xls';
+
+		return $filename;
+	}
+
+	/**
+	 * Gets the study semester covered by the requested date range.
+	 *
+	 * @param int $begin Range start timestamp.
+	 * @param int $ende Range end timestamp.
+	 * @return object|null Study semester, if one overlaps the range.
+	 */
+	private function getStudiensemester($begin, $ende)
+	{
+		$semesterRange = $this->StudiensemesterModel->getByDateRange(
+			date('Y-m-d', $begin),
+			date('Y-m-d', $ende)
+		);
+
+		if (isError($semesterRange) || !hasData($semesterRange))
+			return null;
+
+		$studiensemester = current(getData($semesterRange));
+
+		return $studiensemester;
+	}
+
+	/**
+	 * @param string $name GET parameter name.
+	 * @return int Unix timestamp.
+	 */
+	private function getTimestamp($name)
+	{
+		$value = $this->input->get($name, true);
+
+		if (!is_string($value) || !ctype_digit($value))
+			show_error('Ungueltiger Parameter: '.$name, 400);
+
+		$timestamp = filter_var(
+			$value,
+			FILTER_VALIDATE_INT,
+			array('options' => array('min_range' => 0))
+		);
+
+		if ($timestamp === false)
+			show_error('Ungueltiger Parameter: '.$name, 400);
+
+		return $timestamp;
+	}
+
+	/**
+	 * Ensures access to another user's timetable is explicitly permitted.
+	 *
+	 * @param string $uid Requested user UID.
+	 * @return void
+	 */
+	private function authorizeUid($uid)
+	{
+		if ($uid !== getAuthUID()
+			&& !$this->permissionlib->isBerechtigt('basis/other_lv_plan'))
+		{
+			show_error('Forbidden', 403);
+		}
+	}
+
+	/**
+	 * Ensures the requested user exists.
+	 *
+	 * @param string $uid Requested user UID.
+	 * @return void
+	 */
+	private function validateUid($uid)
+	{
+		$this->BenutzerModel->addSelect('uid');
+		$user = $this->BenutzerModel->load(array($uid));
+
+		if (isError($user))
+			show_error(getError($user), 500);
+
+		if (!hasData($user))
+			show_error('Ungueltiger Parameter: pers_uid', 400);
+	}
+}

application/controllers/LvPlanHTMLDetail.php

@@ -0,0 +1,333 @@
+<?php
+
+if (!defined('BASEPATH'))
+	exit('No direct script access allowed');
+
+require_once(FHCPATH.'include/functions.inc.php');
+
+class LvPlanHTMLDetail extends Auth_Controller
+{
+	const TIMEZONE = 'Europe/Vienna';
+
+	/**
+	 * Object initialization.
+	 */
+	public function __construct()
+	{
+		parent::__construct(array(
+			'index' => array('basis/cis:r')
+		));
+
+		$this->load->model('person/Benutzer_model', 'BenutzerModel');
+		$this->load->model('organisation/Studiengang_model', 'StudiengangModel');
+		$this->load->model('ressource/Ort_model', 'OrtModel');
+		$this->load->model('ressource/Stunde_model', 'StundeModel');
+		$this->loadPhrases(array(
+			'global' => array('termine'),
+			'ui' => array('organisierende', 'teilnehmende')
+		));
+	}
+
+	/**
+	 * Serves details for one hour in the HTML timetable preview.
+	 *
+	 * @return void
+	 */
+	public function index()
+	{
+		$type = $this->getType();
+		$datum = $this->getDate();
+		$hour = $this->getHour();
+
+		if ($type === 'verband')
+			$filters = $this->getVerbandFilters();
+		elseif ($type === 'ort')
+			$filters = $this->getRoomFilters();
+		else
+			$filters = $this->getPersonalFilters();
+
+		$this->load->library('LvPlanHTMLDetailLib');
+		$content = $this->lvplanhtmldetaillib->getContent(
+			$datum,
+			$hour,
+			$type,
+			$filters
+		);
+
+		$this->output
+			->set_content_type('text/html', 'UTF-8')
+			->set_header('X-Content-Type-Options: nosniff')
+			->set_output($content);
+	}
+
+	/**
+	 * @return string Requested timetable type.
+	 */
+	private function getType()
+	{
+		$type = $this->input->get('type', true);
+
+		if (!in_array($type, array('student', 'lektor', 'verband', 'ort'), true))
+			show_error('Ungueltiger Parameter: type', 400);
+
+		return $type;
+	}
+
+	/**
+	 * @return string Date in YYYY-MM-DD format.
+	 */
+	private function getDate()
+	{
+		$value = $this->input->get('datum', true);
+		if (!is_string($value) || !preg_match('/^\d{4}-\d{2}-\d{2}$/', $value))
+			show_error('Ungueltiger Parameter: datum', 400);
+
+		$date = DateTime::createFromFormat(
+			'!Y-m-d',
+			$value,
+			new DateTimeZone(self::TIMEZONE)
+		);
+		$errors = DateTime::getLastErrors();
+		if ($date === false
+			|| ($errors !== false
+				&& ($errors['warning_count'] > 0 || $errors['error_count'] > 0))
+			|| $date->format('Y-m-d') !== $value)
+		{
+			show_error('Ungueltiger Parameter: datum', 400);
+		}
+
+		return $value;
+	}
+
+	/**
+	 * @return array Selected timetable hour.
+	 */
+	private function getHour()
+	{
+		$number = $this->getInteger('stunde', false);
+		$this->StundeModel->addSelect('stunde, beginn, ende');
+		$result = $this->StundeModel->load($number);
+
+		if (isError($result))
+			show_error(getError($result), 500);
+		if (!hasData($result))
+			show_error('Ungueltiger Parameter: stunde', 400);
+
+		$hours = getData($result);
+		$hour = reset($hours);
+		$begin = isset($hour->beginn) ? (string)$hour->beginn : '';
+		$end = isset($hour->ende) ? (string)$hour->ende : '';
+		$beginSeconds = $this->timeToSeconds($begin);
+		$endSeconds = $this->timeToSeconds($end);
+
+		if ($beginSeconds === null || $endSeconds === null || $endSeconds <= $beginSeconds)
+			show_error('Ungueltiges Stundenraster', 500);
+
+		return array(
+			'number' => (string)$hour->stunde,
+			'begin' => $begin,
+			'end' => $end
+		);
+	}
+
+	/**
+	 * @return array Personal timetable filters.
+	 */
+	private function getPersonalFilters()
+	{
+		$uid = $this->input->get('pers_uid', true);
+		if (!is_string($uid) || $uid === '' || !check_utf8($uid))
+			show_error('Ungueltiger Parameter: pers_uid', 400);
+
+		if ($uid !== getAuthUID()
+			&& !$this->permissionlib->isBerechtigt('basis/other_lv_plan'))
+		{
+			show_error('Forbidden', 403);
+		}
+
+		$this->BenutzerModel->addSelect(
+			'tbl_benutzer.uid, tbl_person.titelpre, tbl_person.vorname, '
+			.'tbl_person.nachname, tbl_person.titelpost'
+		);
+		$this->BenutzerModel->addJoin('public.tbl_person', 'person_id', 'LEFT');
+		$result = $this->BenutzerModel->load(array($uid));
+
+		if (isError($result))
+			show_error(getError($result), 500);
+		if (!hasData($result))
+			show_error('Ungueltiger Parameter: pers_uid', 400);
+
+		$users = getData($result);
+		$user = reset($users);
+		$nameParts = array();
+		foreach (array('titelpre', 'vorname', 'nachname', 'titelpost') as $property)
+		{
+			if (isset($user->{$property}) && trim($user->{$property}) !== '')
+				$nameParts[] = trim($user->{$property});
+		}
+
+		return array(
+			'uid' => $uid,
+			'full_name' => implode(' ', $nameParts)
+		);
+	}
+
+	/**
+	 * @return array Room timetable filters.
+	 */
+	private function getRoomFilters()
+	{
+		$ortKurzbz = $this->input->get('ort_kurzbz', true);
+		if (!is_string($ortKurzbz) || $ortKurzbz === '' || !check_utf8($ortKurzbz))
+			show_error('Ungueltiger Parameter: ort_kurzbz', 400);
+
+		$this->OrtModel->addSelect('ort_kurzbz, bezeichnung, content_id');
+		$result = $this->OrtModel->load($ortKurzbz);
+
+		if (isError($result))
+			show_error(getError($result), 500);
+		if (!hasData($result))
+			show_error('Ungueltiger Parameter: ort_kurzbz', 400);
+
+		$rooms = getData($result);
+		$room = reset($rooms);
+
+		return array(
+			'ort_kurzbz' => $ortKurzbz,
+			'bezeichnung' => isset($room->bezeichnung) ? $room->bezeichnung : '',
+			'content_id' => isset($room->content_id) ? $room->content_id : null
+		);
+	}
+
+	/**
+	 * @return array Lehrverband timetable filters.
+	 */
+	private function getVerbandFilters()
+	{
+		$stgKz = $this->getInteger('stg_kz', true);
+		$semester = $this->getInteger('sem', false, true);
+		$verband = $this->getOptionalFilter('ver');
+		$gruppe = $this->getOptionalFilter('grp');
+		$ortKurzbz = $this->getOptionalRoomFilter();
+
+		$this->StudiengangModel->addSelect(
+			'studiengang_kz, UPPER(typ || kurzbz) AS stg_kurzbz'
+		);
+		$result = $this->StudiengangModel->load($stgKz);
+
+		if (isError($result))
+			show_error(getError($result), 500);
+		if (!hasData($result))
+			show_error('Ungueltiger Parameter: stg_kz', 400);
+
+		$programs = getData($result);
+		$program = reset($programs);
+
+		return array(
+			'stg_kz' => $stgKz,
+			'stg_kurzbz' => isset($program->stg_kurzbz)
+				? $program->stg_kurzbz
+				: '',
+			'sem' => $semester,
+			'ver' => $verband,
+			'grp' => $gruppe,
+			'ort_kurzbz' => $ortKurzbz
+		);
+	}
+
+	/**
+	 * Returns the room selected in a Verband preview cell, if present.
+	 *
+	 * @return string|null
+	 */
+	private function getOptionalRoomFilter()
+	{
+		$ortKurzbz = $this->input->get('ort_kurzbz', true);
+		if ($ortKurzbz === null || $ortKurzbz === '')
+			return null;
+		if (!is_string($ortKurzbz) || !check_utf8($ortKurzbz))
+			show_error('Ungueltiger Parameter: ort_kurzbz', 400);
+
+		$this->OrtModel->addSelect('ort_kurzbz');
+		$result = $this->OrtModel->load($ortKurzbz);
+
+		if (isError($result))
+			show_error(getError($result), 500);
+		if (!hasData($result))
+			show_error('Ungueltiger Parameter: ort_kurzbz', 400);
+
+		return $ortKurzbz;
+	}
+
+	/**
+	 * @param string $name GET parameter name.
+	 * @param bool $signed Whether negative values are allowed.
+	 * @param bool $optional Whether the parameter may be omitted or empty.
+	 * @return int|null
+	 */
+	private function getInteger($name, $signed, $optional = false)
+	{
+		$value = $this->input->get($name, true);
+		if ($optional && ($value === null || $value === ''))
+			return null;
+
+		$pattern = $signed ? '/^-?\d+$/' : '/^\d+$/';
+		if (!is_string($value) || !preg_match($pattern, $value))
+			show_error('Ungueltiger Parameter: '.$name, 400);
+
+		$isNegative = $signed && substr($value, 0, 1) === '-';
+		$digits = $isNegative ? substr($value, 1) : $value;
+		$digits = ltrim($digits, '0');
+		if ($digits === '')
+			$digits = '0';
+		$normalizedValue = $isNegative && $digits !== '0' ? '-'.$digits : $digits;
+
+		$integer = filter_var($normalizedValue, FILTER_VALIDATE_INT);
+		if ($integer === false || (!$signed && $integer < 0))
+			show_error('Ungueltiger Parameter: '.$name, 400);
+
+		return $integer;
+	}
+
+	/**
+	 * Returns null for the legacy wildcard values "" and "0".
+	 *
+	 * @param string $name GET parameter name.
+	 * @return string|null
+	 */
+	private function getOptionalFilter($name)
+	{
+		$value = $this->input->get($name, true);
+		if ($value === null || $value === '' || $value === '0')
+			return null;
+
+		if (!is_string($value)
+			|| !check_utf8($value)
+			|| mb_strlen($value) > 20
+			|| !preg_match('/^[[:alnum:]_-]+$/u', $value))
+		{
+			show_error('Ungueltiger Parameter: '.$name, 400);
+		}
+
+		return $value;
+	}
+
+	/**
+	 * @param string $time PostgreSQL time value.
+	 * @return int|null
+	 */
+	private function timeToSeconds($time)
+	{
+		if (!preg_match('/^(\d{1,2}):(\d{2})(?::(\d{2})(?:\.\d+)?)?$/', $time, $matches))
+			return null;
+
+		$hours = (int)$matches[1];
+		$minutes = (int)$matches[2];
+		$seconds = isset($matches[3]) ? (int)$matches[3] : 0;
+
+		if ($hours > 23 || $minutes > 59 || $seconds > 59)
+			return null;
+
+		return $hours * 3600 + $minutes * 60 + $seconds;
+	}
+}

application/controllers/LvPlanHTMLPreview.php

@@ -0,0 +1,356 @@
+<?php
+
+if (!defined('BASEPATH'))
+	exit('No direct script access allowed');
+
+require_once(FHCPATH.'include/functions.inc.php');
+
+class LvPlanHTMLPreview extends Auth_Controller
+{
+	const MAX_DATE_RANGE = 34560000; // 400 days
+	const DEFAULT_RESERVATION_MIN_DAYS = 1;
+	const DEFAULT_RESERVATION_END_DATE = '2099-01-01';
+
+	/**
+	 * Object initialization.
+	 */
+	public function __construct()
+	{
+		parent::__construct([
+			'index' => ['basis/cis:r']
+		]);
+
+		$this->load->model('person/Benutzer_model', 'BenutzerModel');
+		$this->load->model('crm/Student_model', 'StudentModel');
+		$this->load->model('organisation/Studiengang_model', 'StudiengangModel');
+		$this->load->model('ressource/Ort_model', 'OrtModel');
+		$this->loadPhrases(
+			array(
+				'lvplan' => array(
+					'room_not_reservable',
+					'room_reservation_restricted_to_period'
+				)
+			)
+		);
+	}
+
+	/**
+	 * Serves an authenticated, printable timetable preview.
+	 *
+	 * @return void
+	 */
+	public function index()
+	{
+		$type = $this->getType();
+		list($begin, $ende) = $this->getDateRange();
+		if ($type === 'verband')
+			$filters = $this->getVerbandFilters();
+		elseif ($type === 'ort')
+			$filters = $this->getRoomFilters();
+		else
+			$filters = $this->getPersonalFilters($type);
+
+		$this->load->library('LvPlanHTMLLib');
+		$content = $this->lvplanhtmllib->getContent(
+			$begin,
+			$ende,
+			$type,
+			$filters
+		);
+
+		$this->output
+			->set_content_type('text/html', 'UTF-8')
+			->set_header('X-Content-Type-Options: nosniff')
+			->set_output($content);
+	}
+
+	/**
+	 * @return string Requested timetable type.
+	 */
+	private function getType()
+	{
+		$type = $this->input->get('type', true);
+
+		if (!in_array($type, array('student', 'lektor', 'verband', 'ort'), true))
+			show_error('Ungueltiger Parameter: type', 400);
+
+		return $type;
+	}
+
+	/**
+	 * @return array Personal preview filters.
+	 */
+	private function getPersonalFilters($type)
+	{
+		// Legacy wochenplan calendar links include empty Lehrverband parameters
+		// for personal plans. They are irrelevant when type is student or lektor.
+		if ($this->hasVerbandParameters())
+			show_error('Ungueltige Parameterkombination', 400);
+
+		$uid = $this->input->get('pers_uid', true);
+		if (!is_string($uid) || $uid === '' || !check_utf8($uid))
+			show_error('Ungueltiger Parameter: pers_uid', 400);
+
+		if ($uid !== getAuthUID()
+			&& !$this->permissionlib->isBerechtigt('basis/other_lv_plan'))
+		{
+			show_error('Forbidden', 403);
+		}
+
+		$this->BenutzerModel->addSelect(
+			'tbl_benutzer.uid, tbl_person.titelpre, tbl_person.vorname, '
+			.'tbl_person.nachname, tbl_person.titelpost'
+		);
+		$this->BenutzerModel->addJoin('public.tbl_person', 'person_id', 'LEFT');
+		$user = $this->BenutzerModel->load(array($uid));
+
+		if (isError($user))
+			show_error(getError($user), 500);
+		if (!hasData($user))
+			show_error('Ungueltiger Parameter: pers_uid', 400);
+		$users = getData($user);
+		$userData = reset($users);
+		$nameParts = array();
+		foreach (array('titelpre', 'vorname', 'nachname', 'titelpost') as $property)
+		{
+			if (isset($userData->{$property}) && trim($userData->{$property}) !== '')
+				$nameParts[] = trim($userData->{$property});
+		}
+
+		$filters = array(
+			'uid' => $uid,
+			'full_name' => implode(' ', $nameParts)
+		);
+
+		if ($type === 'student')
+		{
+			$this->StudentModel->addSelect(
+				'studiengang_kz, semester, verband, gruppe'
+			);
+			$student = $this->StudentModel->load(array($uid));
+
+			if (isError($student))
+				show_error(getError($student), 500);
+			if (!hasData($student))
+				show_error('Ungueltiger Parameter: pers_uid', 400);
+
+			$students = getData($student);
+			$studentData = reset($students);
+			$filters['stg_kz'] = $studentData->studiengang_kz;
+			$filters['sem'] = $studentData->semester;
+			$filters['ver'] = $studentData->verband;
+			$filters['grp'] = $studentData->gruppe;
+		}
+
+		return $filters;
+	}
+
+	/**
+	 * Legacy room links also carry pers_uid, but the UID does not filter or
+	 * authorize a room plan. Only ort_kurzbz identifies the requested plan.
+	 *
+	 * @return array Room preview filters.
+	 */
+	private function getRoomFilters()
+	{
+		$ortKurzbz = $this->input->get('ort_kurzbz', true);
+		if (!is_string($ortKurzbz) || $ortKurzbz === '' || !check_utf8($ortKurzbz))
+			show_error('Ungueltiger Parameter: ort_kurzbz', 400);
+
+		$this->OrtModel->addSelect('ort_kurzbz, bezeichnung, reservieren');
+		$room = $this->OrtModel->load($ortKurzbz);
+
+		if (isError($room))
+			show_error(getError($room), 500);
+		if (!hasData($room))
+			show_error('Ungueltiger Parameter: ort_kurzbz', 400);
+
+		$rooms = getData($room);
+		$roomData = reset($rooms);
+		$reservationMinDays = defined('RES_TAGE_LEKTOR_MIN')
+			? (int)constant('RES_TAGE_LEKTOR_MIN')
+			: self::DEFAULT_RESERVATION_MIN_DAYS;
+		$reservationEndDate = defined('RES_TAGE_LEKTOR_BIS')
+			? constant('RES_TAGE_LEKTOR_BIS')
+			: self::DEFAULT_RESERVATION_END_DATE;
+		$reservationStart = jump_day(
+			time(),
+			$reservationMinDays - 1
+		);
+		$reservationEnd = strtotime($reservationEndDate);
+
+		return array(
+			'ort_kurzbz' => $ortKurzbz,
+			'bezeichnung' => isset($roomData->bezeichnung) ? $roomData->bezeichnung : '',
+			'room_reservable' => isset($roomData->reservieren)
+				&& $roomData->reservieren === true,
+			'room_reservation_permitted' => $this->permissionlib->isBerechtigt(
+				'lehre/reservierung:begrenzt',
+				'sui'
+			),
+			'room_reservation_start' => $reservationStart,
+			'room_reservation_end' => $reservationEnd,
+			'room_not_reservable_message' => $this->p->t(
+				'lvplan',
+				'room_not_reservable'
+			),
+			'room_reservation_restricted_message' => $this->p->t(
+				'lvplan',
+				'room_reservation_restricted_to_period',
+				array(
+					'start_date' => date('d.m.Y', $reservationStart),
+					'end_date' => date('d.m.Y', $reservationEnd)
+				)
+			)
+		);
+	}
+
+	/**
+	 * @return array Lehrverband preview filters.
+	 */
+	private function getVerbandFilters()
+	{
+		// Legacy wochenplan links always carry pers_uid. It does not filter or
+		// authorize a Lehrverband plan and is intentionally ignored here.
+		$stgKz = $this->getInteger('stg_kz', true);
+		$semester = $this->getInteger('sem', false, true);
+		$verband = $this->getOptionalFilter('ver');
+		$gruppe = $this->getOptionalFilter('grp');
+
+		$this->StudiengangModel->addSelect(
+			'studiengang_kz, UPPER(typ || kurzbz) AS stg_kurzbz'
+		);
+		$studiengang = $this->StudiengangModel->load($stgKz);
+
+		if (isError($studiengang))
+			show_error(getError($studiengang), 500);
+		if (!hasData($studiengang))
+			show_error('Ungueltiger Parameter: stg_kz', 400);
+		$studiengaenge = getData($studiengang);
+		$studiengangData = reset($studiengaenge);
+
+		return array(
+			'stg_kz' => $stgKz,
+			'stg_kurzbz' => isset($studiengangData->stg_kurzbz)
+				? $studiengangData->stg_kurzbz
+				: '',
+			'sem' => $semester,
+			'ver' => $verband,
+			'grp' => $gruppe
+		);
+	}
+
+	/**
+	 * @return bool Whether any non-empty Lehrverband-only parameters were supplied.
+	 */
+	private function hasVerbandParameters()
+	{
+		foreach (array('stg_kz', 'sem', 'ver', 'grp') as $name)
+		{
+			$value = $this->input->get($name, true);
+			if ($value !== null && $value !== '')
+				return true;
+		}
+
+		return false;
+	}
+
+	/**
+	 * @param string $name GET parameter name.
+	 * @param bool $signed Whether negative values are allowed.
+	 * @param bool $optional Whether the parameter may be omitted or empty.
+	 * @return int|null
+	 */
+	private function getInteger($name, $signed, $optional = false)
+	{
+		$value = $this->input->get($name, true);
+		if ($optional && ($value === null || $value === ''))
+			return null;
+
+		$pattern = $signed ? '/^-?\d+$/' : '/^\d+$/';
+
+		if (!is_string($value) || !preg_match($pattern, $value))
+			show_error('Ungueltiger Parameter: '.$name, 400);
+
+		$isNegative = $signed && substr($value, 0, 1) === '-';
+		$digits = $isNegative ? substr($value, 1) : $value;
+		$digits = ltrim($digits, '0');
+		if ($digits === '')
+			$digits = '0';
+		$normalizedValue = $isNegative && $digits !== '0' ? '-'.$digits : $digits;
+
+		$integer = filter_var($normalizedValue, FILTER_VALIDATE_INT);
+		if ($integer === false || (!$signed && $integer < 0))
+			show_error('Ungueltiger Parameter: '.$name, 400);
+
+		return $integer;
+	}
+
+	/**
+	 * Returns null for the legacy wildcard values "" and "0".
+	 *
+	 * @param string $name GET parameter name.
+	 * @return string|null
+	 */
+	private function getOptionalFilter($name)
+	{
+		$value = $this->input->get($name, true);
+
+		if ($value === null || $value === '' || $value === '0')
+			return null;
+
+		if (!is_string($value)
+			|| !check_utf8($value)
+			|| mb_strlen($value) > 20
+			|| !preg_match('/^[[:alnum:]_-]+$/u', $value))
+		{
+			show_error('Ungueltiger Parameter: '.$name, 400);
+		}
+
+		return $value;
+	}
+
+	/**
+	 * Validates and expands the requested range to complete weeks.
+	 *
+	 * @return array{0: int, 1: int} Begin and end timestamps.
+	 */
+	private function getDateRange()
+	{
+		$begin = $this->getTimestamp('begin');
+		$ende = $this->getTimestamp('ende');
+
+		if ($ende < $begin)
+			show_error('Ungueltiger Datumsbereich', 400);
+		if ($ende - $begin > self::MAX_DATE_RANGE)
+			show_error('Datumsbereich zu gross', 400);
+
+		$begin = strtotime('monday this week', $begin);
+		$ende = strtotime('sunday this week', $ende);
+
+		return array($begin, $ende);
+	}
+
+	/**
+	 * @param string $name GET parameter name.
+	 * @return int Unix timestamp.
+	 */
+	private function getTimestamp($name)
+	{
+		$value = $this->input->get($name, true);
+
+		if (!is_string($value) || !ctype_digit($value))
+			show_error('Ungueltiger Parameter: '.$name, 400);
+
+		$timestamp = filter_var(
+			$value,
+			FILTER_VALIDATE_INT,
+			array('options' => array('min_range' => 0))
+		);
+
+		if ($timestamp === false)
+			show_error('Ungueltiger Parameter: '.$name, 400);
+
+		return $timestamp;
+	}
+}

application/controllers/LvPlanICALDownload.php

@@ -0,0 +1,308 @@
+<?php
+
+if (!defined('BASEPATH'))
+	exit('No direct script access allowed');
+
+require_once(FHCPATH.'include/functions.inc.php');
+
+class LvPlanICALDownload extends Auth_Controller
+{
+	const MAX_DATE_RANGE = 34560000; // 400 days
+
+	/**
+	 * Object initialization.
+	 */
+	public function __construct()
+	{
+		parent::__construct([
+			'index' => ['basis/cis:r']
+		]);
+
+		$this->load->model('person/Benutzer_model', 'BenutzerModel');
+		$this->load->model('ressource/Ort_model', 'OrtModel');
+		$this->load->model('organisation/Studiengang_model', 'StudiengangModel');
+		$this->load->model('organisation/Studiensemester_model', 'StudiensemesterModel');
+		$this->loadPhrases(array('global', 'lehre', 'ui'));
+	}
+
+	/**
+	 * Serves an authenticated iCalendar file download.
+	 *
+	 * @return void
+	 */
+	public function index()
+	{
+		$type = $this->getType();
+		$uid = getAuthUID();
+		$ortKurzbz = null;
+		$verbandFilters = null;
+		if ($type === 'ort')
+			$ortKurzbz = $this->getRoom();
+		elseif ($type === 'verband')
+			$verbandFilters = $this->getVerbandFilters();
+		else
+		{
+			$uid = $this->getUid();
+			$this->authorizeUid($uid);
+			$this->validateUid($uid);
+		}
+		$version = $this->getVersion();
+		list($begin, $ende) = $this->getDateRange();
+
+		$this->load->library('LvPlanICALLib');
+		$content = $this->lvplanicallib->getContent(
+			$uid,
+			$begin,
+			$ende,
+			$type,
+			$version,
+			$ortKurzbz,
+			$verbandFilters
+		);
+
+		$filename = $this->getFilename($begin, $ende, $version);
+
+		$this->output
+			->set_content_type('text/calendar', 'UTF-8')
+			->set_header('Content-Disposition: attachment; filename="'.$filename.'"')
+			->set_header('Pragma: public')
+			->set_header('Expires: 0')
+			->set_output($content);
+	}
+
+	/**
+	 * @return string Requested timetable type.
+	 */
+	private function getType()
+	{
+		$type = $this->input->get('type', true);
+
+		if (!in_array($type, array('student', 'lektor', 'ort', 'verband'), true))
+			show_error('Ungueltiger Parameter: type', 400);
+
+		return $type;
+	}
+
+	/**
+	 * @return string Requested user UID.
+	 */
+	private function getUid()
+	{
+		$uid = $this->input->get('pers_uid', true);
+
+		if (!is_string($uid) || $uid === '' || !check_utf8($uid))
+			show_error('Ungueltiger Parameter: pers_uid', 400);
+
+		return $uid;
+	}
+
+	/**
+	 * @return string Requested room identifier.
+	 */
+	private function getRoom()
+	{
+		$ortKurzbz = $this->input->get('ort_kurzbz', true);
+		if (!is_string($ortKurzbz) || $ortKurzbz === '' || !check_utf8($ortKurzbz))
+			show_error('Ungueltiger Parameter: ort_kurzbz', 400);
+
+		$this->OrtModel->addSelect('ort_kurzbz');
+		$room = $this->OrtModel->load($ortKurzbz);
+		if (isError($room))
+			show_error(getError($room), 500);
+		if (!hasData($room))
+			show_error('Ungueltiger Parameter: ort_kurzbz', 400);
+
+		return $ortKurzbz;
+	}
+
+	/**
+	 * @return array Requested Lehrverband filters.
+	 */
+	private function getVerbandFilters()
+	{
+		$stgKz = $this->getInteger('stg_kz', true);
+		$semester = $this->getInteger('sem', false, true);
+		$verband = $this->getOptionalFilter('ver');
+		$gruppe = $this->getOptionalFilter('grp');
+
+		$this->StudiengangModel->addSelect('studiengang_kz');
+		$studiengang = $this->StudiengangModel->load($stgKz);
+		if (isError($studiengang))
+			show_error(getError($studiengang), 500);
+		if (!hasData($studiengang))
+			show_error('Ungueltiger Parameter: stg_kz', 400);
+
+		return array(
+			'stg_kz' => $stgKz,
+			'sem' => $semester,
+			'ver' => $verband,
+			'grp' => $gruppe
+		);
+	}
+
+	private function getInteger($name, $signed, $optional = false)
+	{
+		$value = $this->input->get($name, true);
+		if ($optional && ($value === null || $value === ''))
+			return null;
+
+		$pattern = $signed ? '/^-?\d+$/' : '/^\d+$/';
+		if (!is_string($value) || !preg_match($pattern, $value))
+			show_error('Ungueltiger Parameter: '.$name, 400);
+
+		$integer = filter_var($value, FILTER_VALIDATE_INT);
+		if ($integer === false || (!$signed && $integer < 0))
+			show_error('Ungueltiger Parameter: '.$name, 400);
+
+		return $integer;
+	}
+
+	private function getOptionalFilter($name)
+	{
+		$value = $this->input->get($name, true);
+		if ($value === null || $value === '' || $value === '0')
+			return null;
+		if (!is_string($value)
+			|| !check_utf8($value)
+			|| mb_strlen($value) > 20
+			|| !preg_match('/^[[:alnum:]_-]+$/u', $value))
+		{
+			show_error('Ungueltiger Parameter: '.$name, 400);
+		}
+
+		return $value;
+	}
+
+	/**
+	 * @return int Requested iCalendar major version.
+	 */
+	private function getVersion()
+	{
+		$version = $this->input->get('version', true);
+
+		if (!in_array($version, array('1', '2'), true))
+			show_error('Ungueltiger Parameter: version', 400);
+
+		return (int)$version;
+	}
+
+	/**
+	 * Validates and expands the requested range to complete weeks.
+	 *
+	 * @return array{0: int, 1: int} Begin and end timestamps.
+	 */
+	private function getDateRange()
+	{
+		$begin = $this->getTimestamp('begin');
+		$ende = $this->getTimestamp('ende');
+
+		if ($ende < $begin)
+			show_error('Ungueltiger Datumsbereich', 400);
+
+		if ($ende - $begin > self::MAX_DATE_RANGE)
+			show_error('Datumsbereich zu gross', 400);
+
+		$begin = strtotime('monday this week', $begin);
+		$ende = strtotime('sunday this week', $ende);
+
+		return array($begin, $ende);
+	}
+
+	/**
+	 * Builds the iCalendar download filename.
+	 *
+	 * @param int $begin Range start timestamp.
+	 * @param int $ende Range end timestamp.
+	 * @param int $version iCalendar major version.
+	 * @return string Filename.
+	 */
+	private function getFilename($begin, $ende, $version)
+	{
+		$studiensemester = $this->getStudiensemester($begin, $ende);
+
+		$filename = $this->p->t('global', 'termine');
+		if ($studiensemester !== null)
+			$filename .= '_'.$studiensemester->studiensemester_kurzbz;
+		$filename .= '-'.date('Ymd').'_ical'.$version.'.ics';
+
+		return $filename;
+	}
+
+	/**
+	 * Gets the study semester covered by the requested date range.
+	 *
+	 * @param int $begin Range start timestamp.
+	 * @param int $ende Range end timestamp.
+	 * @return object|null Study semester, if one overlaps the range.
+	 */
+	private function getStudiensemester($begin, $ende)
+	{
+		$semesterRange = $this->StudiensemesterModel->getByDateRange(
+			date('Y-m-d', $begin),
+			date('Y-m-d', $ende)
+		);
+
+		if (isError($semesterRange) || !hasData($semesterRange))
+			return null;
+
+		$studiensemester = current(getData($semesterRange));
+
+		return $studiensemester;
+	}
+
+	/**
+	 * @param string $name GET parameter name.
+	 * @return int Unix timestamp.
+	 */
+	private function getTimestamp($name)
+	{
+		$value = $this->input->get($name, true);
+
+		if (!is_string($value) || !ctype_digit($value))
+			show_error('Ungueltiger Parameter: '.$name, 400);
+
+		$timestamp = filter_var(
+			$value,
+			FILTER_VALIDATE_INT,
+			array('options' => array('min_range' => 0))
+		);
+
+		if ($timestamp === false)
+			show_error('Ungueltiger Parameter: '.$name, 400);
+
+		return $timestamp;
+	}
+
+	/**
+	 * Ensures access to another user's timetable is explicitly permitted.
+	 *
+	 * @param string $uid Requested user UID.
+	 * @return void
+	 */
+	private function authorizeUid($uid)
+	{
+		if ($uid !== getAuthUID()
+			&& !$this->permissionlib->isBerechtigt('basis/other_lv_plan'))
+		{
+			show_error('Forbidden', 403);
+		}
+	}
+
+	/**
+	 * Ensures the requested user exists.
+	 *
+	 * @param string $uid Requested user UID.
+	 * @return void
+	 */
+	private function validateUid($uid)
+	{
+		$this->BenutzerModel->addSelect('uid');
+		$user = $this->BenutzerModel->load(array($uid));
+
+		if (isError($user))
+			show_error(getError($user), 500);
+
+		if (!hasData($user))
+			show_error('Ungueltiger Parameter: pers_uid', 400);
+	}
+}

application/controllers/LvPlanICALSubscription.php

@@ -0,0 +1,167 @@
+<?php
+
+if (!defined('BASEPATH'))
+	exit('No direct script access allowed');
+
+require_once(FHCPATH.'include/functions.inc.php');
+
+class LvPlanICALSubscription extends FHC_Controller
+{
+	/**
+	 * Encrypted calendar subscription token.
+	 *
+	 * @var string|null
+	 */
+	private $cal;
+
+	/**
+	 * UID authenticated by the calendar subscription token.
+	 *
+	 * @var string
+	 */
+	private $uid;
+
+	/**
+	 * First date included in the subscription feed.
+	 *
+	 * @var int Unix timestamp at local midnight
+	 */
+	private $begin;
+
+	/**
+	 * Last date included in the subscription feed.
+	 *
+	 * @var int Unix timestamp at local midnight
+	 */
+	private $ende;
+
+	/**
+	 * Object initialization.
+	 */
+	public function __construct()
+	{
+		parent::__construct();
+
+		$this->load->model('person/Benutzer_model', 'BenutzerModel');
+		$this->load->model('organisation/Studiensemester_model', 'StudiensemesterModel');
+
+		$this->cal = $this->input->get('cal', true);
+		$this->uid = $this->authenticateSubscription($this->cal);
+
+		list($this->begin, $this->ende) = $this->determineDateRange();
+	}
+
+	/**
+	 * Serves the iCalendar subscription feed.
+	 *
+	 * @return void
+	 */
+	public function index()
+	{
+		$this->load->library('LvPlanICALLib');
+
+		$content = $this->lvplanicallib->getContent(
+			$this->uid,
+			$this->begin,
+			$this->ende,
+			null,
+			2,
+			null,
+			null,
+			'FH-Kalender'
+		);
+
+		$filename = 'FH-Kalender_'.date('m_Y', $this->begin).'_ical.ics';
+
+		$this->output
+			->set_content_type('text/calendar', 'UTF-8')
+			->set_header('Content-Disposition: inline; filename="'.$filename.'"')
+			->set_header('Pragma: public')
+			->set_header('Expires: 0')
+			->set_output($content);
+	}
+
+	/**
+	 * Authenticates an encrypted calendar subscription token.
+	 *
+	 * @param string|null $cal Encrypted UID from the subscription URL.
+	 * @return string Authenticated UID.
+	 */
+	private function authenticateSubscription($cal)
+	{
+		if (isEmptyString($cal))
+			show_error('Fehlerhafter Parameter', 400);
+
+		if (!defined('LVPLAN_CYPHER_KEY'))
+			show_error('LVPLAN_CYPHER_KEY is not configured', 500);
+
+		$uid = decryptData($cal, constant('LVPLAN_CYPHER_KEY'));
+
+		if (!is_string($uid) || $uid === '' || !check_utf8($uid))
+			show_error('Fehlerhafter Parameter', 400);
+
+		$this->BenutzerModel->addSelect('uid');
+		$user = $this->BenutzerModel->load([$uid]);
+
+		if (isError($user))
+			show_error(getError($user), 500);
+
+		if (!hasData($user))
+			show_error('Ungueltiger Benutzername', 401);
+
+		return $uid;
+	}
+
+	/**
+	 * Determines the subscription range from the current or next semester.
+	 *
+	 * During the final 30 days of the selected semester, the range is
+	 * extended through the following semester. The resulting range is
+	 * expanded to complete Monday-to-Sunday weeks.
+	 *
+	 * @return array{0: int, 1: int} Begin and end timestamps.
+	 */
+	private function determineDateRange()
+	{
+		$semesterResult = $this->StudiensemesterModel->getAkt();
+
+		if (isError($semesterResult))
+			show_error(getError($semesterResult), 500);
+
+		if (!hasData($semesterResult))
+		{
+			$semesterResult = $this->StudiensemesterModel->getNext();
+
+			if (isError($semesterResult))
+				show_error(getError($semesterResult), 500);
+		}
+
+		if (!hasData($semesterResult))
+			show_error('Studiensemester konnte nicht gefunden werden', 500);
+
+		$semester = current(getData($semesterResult));
+		$begin = strtotime($semester->start);
+		$ende = strtotime($semester->ende);
+
+		$semesterEnd = new DateTime($semester->ende);
+		$daysFromSemesterEnd = (int)$semesterEnd
+			->diff(new DateTime())
+			->format('%R%a');
+
+		if ($daysFromSemesterEnd >= -30)
+		{
+			$nextSemesterResult = $this->StudiensemesterModel
+				->getNextFrom($semester->studiensemester_kurzbz);
+
+			if (isError($nextSemesterResult))
+				show_error(getError($nextSemesterResult), 500);
+
+			if (hasData($nextSemesterResult))
+				$ende = strtotime(current(getData($nextSemesterResult))->ende);
+		}
+ 
+		$begin = strtotime('monday this week', $begin);
+		$ende = strtotime('sunday this week', $ende);
+		return [$begin, $ende];
+	}
+}

application/controllers/Tempus.php

@@ -0,0 +1,40 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ *
+ */
+class Tempus extends Auth_Controller
+{
+	public function __construct()
+	{
+		$permissions = [];
+		$router = load_class('Router');
+		$permissions[$router->method] = ['admin:r', 'assistenz:r'];
+		parent::__construct($permissions);
+
+		// Load Libraries
+		$this->load->library('VariableLib', ['uid' => getAuthUID()]);
+		
+		// Load Config
+		$this->load->config('calendar');
+	}
+
+	/**
+	 * @return void
+	 */
+	public function _remap()
+	{
+
+		$this->load->view('Tempus', [
+			'permissions' => [
+				'admin' => $this->permissionlib->isBerechtigt('admin')
+			],
+			'variables' => [
+				'semester_aktuell' => $this->variablelib->getVar('semester_aktuell'),
+				'timezone' => $this->config->item('timezone')
+			]
+		]);
+	}
+}

application/controllers/api/frontend/v1/Bookmark.php

@@ -18,6 +18,8 @@
 
 if (! defined('BASEPATH')) exit('No direct script access allowed');
 
+use \DateTime as DateTime;
+
 class Bookmark extends FHCAPI_Controller
 {
 
@@ -28,111 +30,162 @@ class Bookmark extends FHCAPI_Controller
 	{
 		parent::__construct([
 			'getBookmarks' => self::PERM_LOGGED,
-            'delete' => self::PERM_LOGGED,
-            'insert' => self::PERM_LOGGED,
+			'delete' => self::PERM_LOGGED,
+			'insert' => self::PERM_LOGGED,
 			'update' => self::PERM_LOGGED,
-        ]);
+			'changeOrder' => self::PERM_LOGGED
+		]);
 
 		$this->load->model('dashboard/Bookmark_model', 'BookmarkModel');
 
 		$this->uid = getAuthUID();
 		$this->pid = getAuthPersonID();
-
 	}
 
 	//------------------------------------------------------------------------------------------------------------------
 	// Public methods
 
 	
-    /**
-	 * gets the bookmarks associated to a user 
+	/**
+	 * gets the bookmarks associated to a user
 	 * @access public
 	 * @return void
 	 */
 	public function getBookmarks()
 	{
-        $this->BookmarkModel->addOrder("bookmark_id");
+		$this->BookmarkModel->addOrder("sort");
 		$bookmarks = $this->BookmarkModel->loadWhere(["uid"=>$this->uid]);
 
-        $bookmarks = $this->getDataOrTerminateWithError($bookmarks);
+		$bookmarks = $this->getDataOrTerminateWithError($bookmarks);
 
-        $this->terminateWithSuccess($bookmarks);
-    }
-
-    /**
-	 * deletes bookmark from associated user 
-	 * @access public
-	 * @return void
-	 */
-    public function delete($bookmark_id)
-	{
-        $bookmark = $this->BookmarkModel->load($bookmark_id);
-
-        $bookmark = current($this->getDataOrTerminateWithError($bookmark));
-
-        // only delete bookmark if the user is the owner of the bookmark
-        if($bookmark->uid == $this->uid || $this->permissionlib->isBerechtigt('admin')){
-
-            $delete_result = $this->BookmarkModel->delete($bookmark_id);
-
-            $delete_result = $this->getDataOrTerminateWithError($delete_result);
-
-            $this->terminateWithSuccess($delete_result);
-        }else{
-            $this->_outputAuthError(['delete' => ['admin:rw']]);
-        }
-    }
-
-    /**
-	 * inserts new bookmark into the bookmark table 
-	 * @access public
-	 * @return void
-	 */
-    public function insert()
-	{
-        // form validation
-        $this->load->library('form_validation');
-        $this->form_validation->set_rules('url', 'URL', 'required|valid_url|max_length[511]');
-        $this->form_validation->set_rules('title', 'Title', 'required|max_length[255]');
-        if($this->form_validation->run() == FALSE) $this->terminateWithValidationErrors($this->form_validation->error_array());
-
-        $url = $this->input->post('url',true);
-        $title = $this->input->post('title',true);
-        $tag = $this->input->post('tag', true);
-
-        $insert_into_result = $this->BookmarkModel->insert(['uid'=>$this->uid, 'url'=>$url, 'title'=>$title,'tag'=>$tag, 'insertvon'=>$this->uid, 'updateamum'=>NULL, 'updatevon'=>NULL]);
-
-        $insert_into_result = $this->getDataOrTerminateWithError($insert_into_result);
-
-        $this->terminateWithSuccess($insert_into_result);
-
-    }
+		$this->terminateWithSuccess($bookmarks);
+	}
 
 	/**
-	 * updates bookmark in the bookmark table 
+	 * deletes bookmark from associated user
 	 * @access public
 	 * @return void
 	 */
-    public function update($bookmark_id)
+	public function delete($bookmark_id)
 	{
-        // form validation
-        $this->load->library('form_validation');
-        $this->form_validation->set_rules('url', 'URL', 'required|valid_url|max_length[511]');
-        $this->form_validation->set_rules('title', 'Title', 'required|max_length[255]');
-        if($this->form_validation->run() == FALSE) $this->terminateWithValidationErrors($this->form_validation->error_array());
+		$bookmark = $this->BookmarkModel->load($bookmark_id);
 
-        $url = $this->input->post('url',true);
-        $title = $this->input->post('title',true);
+		$bookmark = current($this->getDataOrTerminateWithError($bookmark));
+
+		// only delete bookmark if the user is the owner of the bookmark
+		if ($bookmark->uid == $this->uid || $this->permissionlib->isBerechtigt('admin')) {
+			$delete_result = $this->BookmarkModel->delete($bookmark_id);
+
+			$delete_result = $this->getDataOrTerminateWithError($delete_result);
+
+			$this->terminateWithSuccess($delete_result);
+		} else {
+			$this->_outputAuthError(['delete' => ['admin:rw']]);
+		}
+	}
+
+	/**
+	 * inserts new bookmark into the bookmark table
+	 * @access public
+	 * @return void
+	 */
+	public function insert()
+	{
+		// form validation
+		$this->load->library('form_validation');
+		$this->form_validation->set_rules('url', 'URL', 'required|valid_url|max_length[511]');
+		$this->form_validation->set_rules('title', 'Title', 'required|max_length[255]');
+		if (!$this->form_validation->run())
+			$this->terminateWithValidationErrors($this->form_validation->error_array());
+
+		$url = $this->input->post('url', true);
+		$title = $this->input->post('title', true);
+		$tag = $this->input->post('tag', true);
+		if (is_array($tag)) {
+			$tag = json_encode($tag); // convert PHP array to JSON string
+		}
+		$sort = $this->input->post('sort', true);
+
+		$insert_into_result = $this->BookmarkModel->insert([
+			'uid' => $this->uid,
+			'url' => $url,
+			'title' => $title,
+			'tag' => $tag,
+			'insertvon' => $this->uid,
+			'updateamum' => null,
+			'updatevon' => null,
+			'sort' => $sort
+		]);
+
+		$insert_into_result = $this->getDataOrTerminateWithError($insert_into_result);
+
+		$this->terminateWithSuccess($insert_into_result);
+	}
+
+	/**
+	 * updates bookmark in the bookmark table
+	 * @access public
+	 * @return void
+	 */
+	public function update($bookmark_id)
+	{
+		// form validation
+		$this->load->library('form_validation');
+		$this->form_validation->set_rules('url', 'URL', 'required|valid_url|max_length[511]');
+		$this->form_validation->set_rules('title', 'Title', 'required|max_length[255]');
+		if (!$this->form_validation->run())
+			$this->terminateWithValidationErrors($this->form_validation->error_array());
+
+		$url = $this->input->post('url', true);
+		$title = $this->input->post('title', true);
+		$tag = $this->input->post('tag', true);
+		if (is_array($tag)) {
+			$tag = json_encode($tag);
+		}
 
 		$now = new DateTime();
 		$now = $now->format('Y-m-d H:i:s');
 
-        $update_result = $this->BookmarkModel->update($bookmark_id,['url'=>$url, 'title'=>$title,'updateamum'=>$now]);
+		$update_result = $this->BookmarkModel->update($bookmark_id, [
+			'url' => $url,
+			'title' => $title,
+			'tag' => $tag,
+			'updateamum' => $now
+		]);
 
-        $update_result = $this->getDataOrTerminateWithError($update_result);
+		$update_result = $this->getDataOrTerminateWithError($update_result);
 
-        $this->terminateWithSuccess($update_result);
+		$this->terminateWithSuccess($update_result);
+	}
 
-    }
+	/**
+	 * changes sort of two bookmarks in the bookmark table
+	 * @access public
+	 * @return void
+	 */
+	public function changeOrder($bookmark_id1, $bookmark_id2)
+	{
+		$update_result = [];
+
+		$result1 = $this->BookmarkModel->load($bookmark_id1);
+		$data1 = $this->getDataOrTerminateWithError($result1);
+		$sort1 = current($data1)->sort;
+
+		$result2 = $this->BookmarkModel->load(["bookmark_id"=>$bookmark_id2]);
+		$data2 = $this->getDataOrTerminateWithError($result2);
+		$sort2 = current($data2)->sort;
+
+		$update_result1 = $this->BookmarkModel->update($bookmark_id1, [
+			'sort' => $sort2
+		]);
+		$update_result[] = $this->getDataOrTerminateWithError($update_result1);
+
+		$update_result2 = $this->BookmarkModel->update($bookmark_id2, [
+			'sort' => $sort1
+		]);
+		$update_result[] = $this->getDataOrTerminateWithError($update_result2);
+
+		$this->terminateWithSuccess($update_result);
+	}
 }
 

application/controllers/api/frontend/v1/Cis4FhcApi.php

@@ -27,7 +27,7 @@ class Cis4FhcApi extends FHCAPI_Controller
 	public function __construct()
 	{
 		parent::__construct([
-			'getViewData' => self::PERM_LOGGED,
+			'dashboardViewData' => self::PERM_LOGGED,
 		]);
 		
 	}
@@ -36,17 +36,22 @@ class Cis4FhcApi extends FHCAPI_Controller
 	// Public methods
 
 	/**
-	 * fetches ViewData
-	 */
-	public function getViewData()
+     * retrieves view data for dashboard view
+     * @access public
+     * @param  $uid the userID for which profile is being viewed, null or missing value implies one's own profile
+     */
+	public function dashboardViewData()
 	{
 		$this->load->model('person/Person_model','PersonModel');
 		$personData = getData($this->PersonModel->getByUid(getAuthUID()))[0];
 
+		$this->load->config('calendar');
+
 		$viewData = array(
 			'uid' => getAuthUID(),
 			'name' => $personData->vorname,
-			'person_id' => $personData->person_id
+			'person_id' => $personData->person_id,
+			'timezone' => $this->config->item('timezone'),
 		);
 
 		$this->terminateWithSuccess($viewData);

application/controllers/api/frontend/v1/CisMenu.php

@@ -16,12 +16,13 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-if (! defined('BASEPATH')) exit('No direct script access allowed');
+if (!defined('BASEPATH'))
+	exit('No direct script access allowed');
 
 
 class CisMenu extends FHCAPI_Controller
 {
-	
+
 	/**
 	 * Object initialization
 	 */
@@ -31,28 +32,95 @@ class CisMenu extends FHCAPI_Controller
 			'getMenu' => self::PERM_LOGGED,
 		]);
 
-		
+
 
 	}
 
 	//------------------------------------------------------------------------------------------------------------------
 	// Public methods
 
-    /**
+	/**
 	 * fetches the menu for CIS from the database based on the userLanguage
 	 */
-    public function getMenu()
+	public function getMenu()
 	{
 		$this->load->model('content/Content_model', 'ContentModel');
 		$this->load->config('cis');
-		$cis4_content_id =$this->config->item('cis_menu_root_content_id');
-		$result = $this->ContentModel->getMenu($cis4_content_id, getAuthUID(),getUserLanguage());
+		$cis4_content_id = $this->config->item('cis_menu_root_content_id');
+		$result = $this->ContentModel->getMenu($cis4_content_id, getAuthUID(), getUserLanguage());
 		$result = $this->getDataOrTerminateWithError($result);
 		$menu = $result->childs ?? [];
-		$this->terminateWithSuccess($menu);
-    }
 
-	
-	
+		$menu = $this->generateUrlsForMenuItems($menu);
+		$this->terminateWithSuccess($menu);
+	}
+
+	private function generateUrlsForMenuItems($menuItems)
+	{
+		return array_map(
+			function ($menuItem) {
+				return $this->generateUrlForMenuItem($menuItem);
+			},
+			$menuItems
+		);
+	}
+
+	private function generateUrlForMenuItem($menuItem)
+	{
+		$menuItem->url = $this->menuItemUrlHelper($menuItem);
+		unset($menuItem->content);
+
+		if ($menuItem->childs && count($menuItem->childs)) {
+			$menuItem->childs = $this->generateUrlsForMenuItems($menuItem->childs);
+		}
+
+		return $menuItem;
+	}
+
+	private function menuItemUrlHelper($menuItem)
+	{
+		if ($menuItem->template_kurzbz !== 'redirect') {
+			return site_url("/CisVue/Cms/content/" . $menuItem->content_id);
+		}
+
+		if (!$menuItem->content || !mb_strlen($menuItem->content)) {
+			return '';
+		}
+
+		$doc = new DOMDocument();
+		$doc->loadXML($menuItem->content);
+		$urlElem = $doc->getElementsByTagName('url')->item(0);
+
+		if (!$urlElem) {
+			return '';
+		}
+
+		$url = $urlElem->textContent;
+
+		if (strpos($url, '../cms/news.php') !== false) {
+			$newsRegex = '/^\.\.\/cms\/news\.php/';
+			$url = preg_replace($newsRegex, site_url("/CisVue/Cms/news"), $url);
+		}
+
+		if (strpos($url, '../cms/content.php?') !== false) {
+			$contentRegex = '/^\.\.\/cms\/content\.php\?content_id=([0-9]+)/';
+			$matches = [];
+			preg_match($contentRegex, $url, $matches);
+			$url = site_url('/CisVue/Cms/content/' . $matches[1]);
+		}
+
+		if (strpos($url, '../index.ci.php') !== false) {
+			$indexRegex = '/^\.\.\/index\.ci\.php/';
+			$url = preg_replace($indexRegex, site_url(), $url);
+		}
+
+		if (strpos($url, '../') !== false) {
+			$relativeRegex = '/^\.\.\//';
+			$url = preg_replace($relativeRegex, base_url(), $url);
+		}
+
+		return $url;
+	}
+
 }
 

application/controllers/api/frontend/v1/Lehre.php

@@ -38,7 +38,8 @@ class Lehre extends FHCAPI_Controller
 		parent::__construct([
 			'lvStudentenMail' => self::PERM_LOGGED,
 			'LV' => self::PERM_LOGGED,
-			'Pruefungen' => self::PERM_LOGGED
+			'Pruefungen' => self::PERM_LOGGED,
+			'semesterAverageGrade' => self::PERM_LOGGED,
 		]);
 		
 	}
@@ -100,5 +101,49 @@ class Lehre extends FHCAPI_Controller
 
 		$this->terminateWithSuccess($result);
 	}
+
+	/**
+	 * calculates and returns the grade average and weighted average for a specific semester
+	 * @param string $studiensemester_kurzbz
+	 * @return void
+	 */
+
+	public function semesterAverageGrade($studiensemester_kurzbz)
+	{
+		$this->load->model('education/Lehrveranstaltung_model', 'LehrveranstaltungModel');
+		$semesterLvs = $this->LehrveranstaltungModel->getLvsByStudentWithGrades(getAuthUID(), $studiensemester_kurzbz, getUserLanguage());
+
+		if (isError($semesterLvs))
+			return $this->outputJsonError(getError($semesterLvs));
+
+		$semesterLvsData = getData($semesterLvs);
+
+		$doGradesExist = false;
+		$sum = 0;
+		$count = 0;
+		$sumWeighted = 0;
+		$sumEcts = 0;
+
+		foreach ($semesterLvsData as $lv) {
+			if (!$lv->znote || $lv->znote < 1 || $lv->znote > 5)
+				continue;
+
+			$doGradesExist = true;
+
+			$sum += $lv->znote;
+			$count++;
+			$sumWeighted += $lv->znote * floatval($lv->ects);
+			$sumEcts += floatval($lv->ects);
+		}
+
+		$averageGrade = null;
+		$weightedAverageGrade = null;
+		if ($doGradesExist) {
+			$averageGrade = $sum/$count;
+			$weightedAverageGrade = $sumWeighted/$sumEcts;
+		}
+
+		$this->terminateWithSuccess(['average_grade' => $averageGrade, 'weighted_average_grade' => $weightedAverageGrade]);
+	}
 }
 

application/controllers/api/frontend/v1/LvPlan.php

@@ -16,7 +16,8 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-if (! defined('BASEPATH')) exit('No direct script access allowed');
+if (!defined('BASEPATH'))
+	exit('No direct script access allowed');
 
 use CI3_Events as Events;
 use \DateTime as DateTime;
@@ -33,19 +34,25 @@ class LvPlan extends FHCAPI_Controller
 
 		parent::__construct([
 			'getRoomplan' => self::PERM_LOGGED,
-            'Stunden' => self::PERM_LOGGED,
-            'getReservierungen' => self::PERM_LOGGED,
+			'Stunden' => self::PERM_LOGGED,
+			'getReservierungen' => self::PERM_LOGGED,
 			'LvPlanEvents' => self::PERM_LOGGED,
 			'eventsPersonal' => self::PERM_LOGGED,
 			'eventsLv' => self::PERM_LOGGED,
 			'getLehreinheitStudiensemester' => self::PERM_LOGGED,
 			'studiensemesterDateInterval' => self::PERM_LOGGED,
 			'getLvPlanForStudiensemester' => self::PERM_LOGGED,
-			'getLv' => self::PERM_LOGGED
+			'getLv' => self::PERM_LOGGED,
+			'eventsStgOrg' => self::PERM_LOGGED,
+			'fetchFerienEvents' => self::PERM_LOGGED,
+			'getStudiengaenge' => self::PERM_LOGGED,
+			'getLehrverband' => self::PERM_LOGGED,
+			'permissionOtherLvPlan' => self::PERM_LOGGED,
+			'compactibleEventTypes' => self::PERM_LOGGED,
 		]);
 
-        $this->load->library('LogLib');
-        $this->loglib->setConfigs(array(
+		$this->load->library('LogLib');
+		$this->loglib->setConfigs(array(
 			'classIndex' => 5,
 			'functionIndex' => 5,
 			'lineIndex' => 4,
@@ -53,17 +60,17 @@ class LvPlan extends FHCAPI_Controller
 			'dbExecuteUser' => 'RESTful API'
 		));
 
-        $this->load->library('form_validation');
+		$this->load->library('form_validation');
 	}
 
 	//------------------------------------------------------------------------------------------------------------------
 	// Public methods
 
 	/**
-     * fetches LvPlan and Moodle events together
-     * @access public
-     *
-     */
+	 * fetches LvPlan and Moodle events together
+	 * @access public
+	 *
+	 */
 	public function LvPlanEvents()
 	{
 		$hasLv = $this->input->post('lv_id');
@@ -83,24 +90,30 @@ class LvPlan extends FHCAPI_Controller
 		// form validation
 		$this->form_validation->set_rules('start_date', "start_date", "required");
 		$this->form_validation->set_rules('end_date', "end_date", "required");
-		
+
 		if (!$this->form_validation->run())
 			$this->terminateWithValidationErrors($this->form_validation->error_array());
 
 		// storing the post parameter in local variables
 		$start_date = $this->input->post('start_date', true);
 		$end_date = $this->input->post('end_date', true);
+		$uid = $this->input->post('uid', true);
+
+		// disallow accessing other user's events if missing permission
+		if ($uid && $uid !== getAuthUID() && !$this->permissionlib->isBerechtigt('basis/other_lv_plan')) {
+			$this->terminateWithError("Missing permission to view other users' timetables!");
+		}
 
 		// fetching lvplan events
-		$result = $this->stundenplanlib->getEventsUser($start_date, $end_date);
+		$result = $this->stundenplanlib->getEventsUser($start_date, $end_date, $uid);
 		$lvplanEvents = $this->getDataOrTerminateWithError($result);
 
 		// fetching moodle events
-		$moodleEvents = $this->fetchMoodleEvents($start_date, $end_date);
+		$moodleEvents = $this->fetchMoodleEvents($start_date, $end_date, $uid);
 
 		// fetching ferien events
-		$ferienEvents = $this->fetchFerienEvents($start_date, $end_date);
-		
+		$ferienEvents = $this->fetchFerienEvents($start_date, $end_date, $uid);
+
 
 		$this->terminateWithSuccess(array_merge(
 			$lvplanEvents,
@@ -109,6 +122,45 @@ class LvPlan extends FHCAPI_Controller
 		));
 	}
 
+	/**
+	 * fetches LvPlan for studiengang / semester / verband / gruppe
+	 *
+	 * @access public
+	 */
+	public function eventsStgOrg()
+	{
+		$this->load->library('StundenplanLib');
+
+		// form validation
+		$this->form_validation->set_rules('start_date', "start_date", "required");
+		$this->form_validation->set_rules('end_date', "end_date", "required");
+		//$this->form_validation->set_rules('stg_kz', "stg_kz", "required"); //no validation show empty calendar
+
+		if (!$this->form_validation->run()) {
+			$this->terminateWithValidationErrors($this->form_validation->error_array());
+			$stgOrgEvents = [];
+			$ferienEvents = [];
+		} else {
+			$start_date = $this->input->post('start_date', true);
+			$end_date = $this->input->post('end_date', true);
+			$stg_kz = $this->input->post('stg_kz', true);
+			$sem = $this->input->post('sem', true);
+			$verband = $this->input->post('verband', true);
+			$gruppe = $this->input->post('gruppe', true);
+
+			$result = $this->stundenplanlib->getEventsStgOrg($start_date, $end_date, $stg_kz, $sem, $verband, $gruppe);
+			$stgOrgEvents = $this->getDataOrTerminateWithError($result);
+
+			$result = $this->stundenplanlib->fetchFerienTageEvents($start_date, $end_date, $stg_kz);
+			$ferienEvents = $this->getDataOrTerminateWithError($result);
+		}
+
+		$this->terminateWithSuccess(array_merge(
+			$stgOrgEvents,
+			$ferienEvents
+		));
+	}
+
 	/**
 	 * fetches LvPlan and Ferien events together for the lv
 	 *
@@ -122,7 +174,7 @@ class LvPlan extends FHCAPI_Controller
 		$this->form_validation->set_rules('start_date', "start_date", "required");
 		$this->form_validation->set_rules('end_date', "end_date", "required");
 		$this->form_validation->set_rules('lv_id', "lv_id", "required|integer");
-		
+
 		if (!$this->form_validation->run())
 			$this->terminateWithValidationErrors($this->form_validation->error_array());
 
@@ -137,7 +189,6 @@ class LvPlan extends FHCAPI_Controller
 
 		// fetching ferien events
 		$ferienEvents = $this->fetchFerienEvents($start_date, $end_date);
-		
 
 		$this->terminateWithSuccess(array_merge(
 			$lvplanEvents,
@@ -146,40 +197,42 @@ class LvPlan extends FHCAPI_Controller
 	}
 
 	//TODO: delete this function if we don't use the old calendar export endpoints anymore
-	public function studiensemesterDateInterval($date){
-		$this->load->model('organisation/Studiensemester_model','StudiensemesterModel');
-		$studiensemester =$this->StudiensemesterModel->getByDate(date_format(date_create($date),'Y-m-d'));
-		$studiensemester =current($this->getDataOrTerminateWithError($studiensemester));
+	public function studiensemesterDateInterval($date)
+	{
+		$this->load->model('organisation/Studiensemester_model', 'StudiensemesterModel');
+		$studiensemester = $this->StudiensemesterModel->getByDate(date_format(date_create($date), 'Y-m-d'));
+		$studiensemester = current($this->getDataOrTerminateWithError($studiensemester));
 		$this->terminateWithSuccess($studiensemester);
 	}
 
-	public function getLvPlanForStudiensemester($studiensemester,$lvid){
+	public function getLvPlanForStudiensemester($studiensemester, $lvid)
+	{
 		$this->load->library('StundenplanLib');
-		$this->load->model('organisation/Studiensemester_model','StudiensemesterModel');
-		
-		$studiensemester_result = $this->StudiensemesterModel->loadWhere(["studiensemester_kurzbz"=>$studiensemester]);
+		$this->load->model('organisation/Studiensemester_model', 'StudiensemesterModel');
+
+		$studiensemester_result = $this->StudiensemesterModel->loadWhere(["studiensemester_kurzbz" => $studiensemester]);
 		$studiensemester_result = current($this->getDataOrTerminateWithError($studiensemester_result));
 		$timespan_start = new DateTime($studiensemester_result->start);
 		$timespan_ende = new DateTime($studiensemester_result->ende);
-		$lvplan = $this->stundenplanlib->getStundenplan(date_format($timespan_start, 'Y-m-d'),date_format($timespan_ende, 'Y-m-d'), $lvid);
+		$lvplan = $this->stundenplanlib->getStundenplan(date_format($timespan_start, 'Y-m-d'), date_format($timespan_ende, 'Y-m-d'), $lvid);
 		$this->terminateWithSuccess($lvplan);
-		
-	}
-		
 
-    /**
-     * fetches Stunden layout from database
-     * @access public
-     *
-     */
-    public function Stunden()
+	}
+
+
+	/**
+	 * fetches Stunden layout from database
+	 * @access public
+	 *
+	 */
+	public function Stunden()
 	{
 		$this->load->model('ressource/Stunde_model', 'StundeModel');
 
 		$this->StundeModel->addOrder('stunde', 'ASC');
 		$stunden = $this->StundeModel->load();
 
-        $stunden = $this->getDataOrTerminateWithError($stunden);
+		$stunden = $this->getDataOrTerminateWithError($stunden);
 
 		$this->terminateWithSuccess($stunden);
 	}
@@ -210,10 +263,10 @@ class LvPlan extends FHCAPI_Controller
 		$roomplan_data = $this->stundenplanlib->getRoomplan($ort_kurzbz, $start_date, $end_date);
 
 		$roomplan_data = $this->getDataOrTerminateWithError($roomplan_data);
-		
+
 		$this->terminateWithSuccess($roomplan_data);
 	}
-	
+
 	/**
 	 * gets the reservierungen of a room if the ort_kurzbz parameter is
 	 * supplied otherwise gets the reservierungen of the lvplan of a student
@@ -226,25 +279,32 @@ class LvPlan extends FHCAPI_Controller
 	{
 		$this->form_validation->set_rules('start_date', "StartDate", "required");
 		$this->form_validation->set_rules('end_date', "EndDate", "required");
-		
+
 		if (!$this->form_validation->run())
 			$this->terminateWithValidationErrors($this->form_validation->error_array());
 
 		// storing the post parameter in local variables
 		$start_date = $this->input->post('start_date', true);
 		$end_date = $this->input->post('end_date', true);
+		$uid = $this->input->post('uid', true);
+
+		// disallow accessing other user's reservierungen if missing permission
+		if ($uid && $uid !== getAuthUID() && !$this->permissionlib->isBerechtigt('basis/other_lv_plan')) {
+			$this->terminateWithError("Missing permission to view other users' timetables!");
+		}
 
 		// get data
 		$this->load->library('StundenplanLib');
 
-		$result = $this->stundenplanlib->getReservierungen($start_date, $end_date, $ort_kurzbz);
+		$result = $this->stundenplanlib->getReservierungen($start_date, $end_date, $ort_kurzbz, $uid);
 
 		$result = $this->getDataOrTerminateWithError($result);
 
 		$this->terminateWithSuccess($result);
 	}
 
-	public function getLehreinheitStudiensemester($lehreinheit_id){
+	public function getLehreinheitStudiensemester($lehreinheit_id)
+	{
 		$this->load->model('education/Lehreinheit_model', 'LehreinheitModel');
 		$this->LehreinheitModel->addSelect(["studiensemester_kurzbz"]);
 		$result = $this->LehreinheitModel->load($lehreinheit_id);
@@ -287,6 +347,68 @@ class LvPlan extends FHCAPI_Controller
 		return $this->terminateWithSuccess(current($result));
 	}
 
+	public function getStudiengaenge()
+	{
+		$this->load->model('organisation/Studiengang_model', 'StudiengangModel');
+
+		$this->StudiengangModel->addOrder('typ');
+		$this->StudiengangModel->addOrder('kurzbz');
+		$result = $this->StudiengangModel->loadWhere([
+			'aktiv' => true
+		]);
+
+		$data = $this->getDataOrTerminateWithError($result);
+
+		return $this->terminateWithSuccess($data);
+	}
+
+	public function getLehrverband($studiengang_kz, $semester = null, $verband = null)
+	{
+		$this->load->model('organisation/Lehrverband_model', 'LehrverbandModel');
+
+		$where = [
+			'aktiv' => true,
+			'studiengang_kz' => $studiengang_kz,
+		];
+
+		if ($semester !== null && $semester !== 'null' && $semester !== 'undefined') {
+			$where['semester'] = $semester;
+		}
+		if ($verband !== null && $verband !== 'null' && $verband !== 'undefined') {
+			$where['verband'] = $verband;
+		}
+
+		$this->LehrverbandModel->addOrder('studiengang_kz');
+		$this->LehrverbandModel->addOrder('semester');
+		$this->LehrverbandModel->addOrder('verband');
+		$this->LehrverbandModel->addOrder('gruppe');
+		$result = $this->LehrverbandModel->loadWhere($where);
+
+		$data = $this->getDataOrTerminateWithError($result);
+
+		return $this->terminateWithSuccess($data);
+	}
+
+	/**
+	 * Checks if the current user has permission to view other users' timetables
+	 *
+	 * @return void
+	 */
+	public function permissionOtherLvPlan()
+	{
+		$this->terminateWithSuccess($this->permissionlib->isBerechtigt('basis/other_lv_plan'));
+	}
+
+	/**
+	 * get event types which can be compacted in lv plan display
+	 *
+	 * @return void
+	 */
+	public function compactibleEventTypes()
+	{
+		$this->terminateWithSuccess(["lehreinheit", "reservierung", "ferien", "moodle"]);
+	}
+
 	/**
 	 * fetch moodle events
 	 *
@@ -294,30 +416,34 @@ class LvPlan extends FHCAPI_Controller
 	 * @param string		$end_date
 	 * @return array
 	 */
-	private function fetchMoodleEvents($start_date, $end_date)
+	private function fetchMoodleEvents($start_date, $end_date, $uid = null)
 	{
+		if ($uid && $uid !== getAuthUID()) {
+			return [];
+		}
+
 		$this->load->config('calendar');
 
 		$tz = new DateTimeZone($this->config->item('timezone'));
-		
+
 		$start = new DateTime($start_date);
 		$start->setTimezone($tz);
-		
+
 		$end = new DateTime($end_date);
 		$end->setTimezone($tz);
 		$end->modify('+1 day -1 second');
-		
+
 		$moodle_events = [];
-		
+
 		Events::trigger(
 			'moodleCalendarEvents',
-			function & () use (&$moodle_events) {
+			function &() use (&$moodle_events) {
 				return $moodle_events;
 			},
 			[
 				'start_date' => $start->format('c'),
 				'end_date' => $end->format('c'),
-				'username' => getAuthUID()
+				'username' => $uid ?? getAuthUID()
 			]
 		);
 
@@ -331,23 +457,23 @@ class LvPlan extends FHCAPI_Controller
 	 * @param string		$end_date
 	 * @return array
 	 */
-	private function fetchFerienEvents($start_date, $end_date)
+	private function fetchFerienEvents($start_date, $end_date, $uid = null)
 	{
 		$this->load->model('organisation/Studiensemester_model', 'StudiensemesterModel');
 		$this->load->model('education/Studentlehrverband_model', 'StudentLehrverbandModel');
 
 		$currentStudiensemester = $this->StudiensemesterModel->getByDate($start_date);
 		$currentStudiensemester = $this->getDataOrTerminateWithError($currentStudiensemester);
-		
+
 		if ($currentStudiensemester) {
 			$studentsemester_kurzbz = current($currentStudiensemester)->studiensemester_kurzbz;
 
 			$studiengang = $this->StudentLehrverbandModel->loadWhere([
-				"student_uid" => getAuthUID(),
+				"student_uid" => $uid ?? getAuthUID(),
 				"studiensemester_kurzbz" => $studentsemester_kurzbz
 			]);
 			$studiengang = $this->getDataOrTerminateWithError($studiengang);
-			
+
 			if ($studiengang)
 				$studiengang_kz = current($studiengang)->studiengang_kz;
 			else
@@ -357,7 +483,7 @@ class LvPlan extends FHCAPI_Controller
 		}
 
 		$ferienEvents = $this->stundenplanlib->fetchFerienTageEvents($start_date, $end_date, $studiengang_kz);
-		
+
 		return $this->getDataOrTerminateWithError($ferienEvents);
 	}
 }

application/controllers/api/frontend/v1/OtherLvPlan.php

@@ -0,0 +1,76 @@
+<?php
+/**
+ * Copyright (C) 2024 fhcomplete.org
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+if (!defined('BASEPATH'))
+    exit('No direct script access allowed');
+
+class OtherLvPlan extends FHCAPI_Controller
+{
+
+    /**
+     * Object initialization
+     */
+    public function __construct()
+    {
+        parent::__construct([
+            'otherLvPlanViewData' => ['basis/other_lv_plan:r'],
+        ]);
+
+        $this->load->model('ressource/mitarbeiter_model', 'MitarbeiterModel');
+        $this->load->model('person/Benutzer_model', 'BenutzerModel');
+
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    // Public methods
+
+    /**
+     * retrieves viewData for other lv plan view
+     * @access public
+     * @param  $uid the userID for which the other lv plan is being viewed
+     */
+    public function otherLvPlanViewData($uid)
+    {
+        $isMitarbeiterResult = $this->MitarbeiterModel->isMitarbeiter($uid);
+        $isMitarbeiter = getData($isMitarbeiterResult);
+        $isStudent = !$isMitarbeiter;
+
+        $this->BenutzerModel->addSelect(["foto", "vorname", "nachname"]);
+        $this->BenutzerModel->addJoin("tbl_person", "person_id");
+        $personResult = $this->BenutzerModel->load([$uid]);
+        $person = hasData($personResult) ? getData($personResult) : null;
+
+        $viewData = [
+            "user_data" => [
+                "username" => $uid,
+                "is_student" => $isStudent,
+                "is_mitarbeiter" => $isMitarbeiter,
+                "foto" => $person[0]->foto,
+                "vorname" => $person[0]->vorname,
+                "nachname" => $person[0]->nachname,
+            ],
+        ];
+
+        $this->terminateWithSuccess($viewData);
+    }
+
+    // -----------------------------------------------------------------------------------------------------------------
+    // Private methods
+
+}
+

application/controllers/api/frontend/v1/Phrasen.php

@@ -32,6 +32,8 @@ class Phrasen extends FHCAPI_Controller
 			'setLanguage' => self::PERM_ANONYMOUS,
 			'getLanguage' => self::PERM_ANONYMOUS,
 			'getAllLanguages' => self::PERM_ANONYMOUS,
+			'getPhrases' => self::PERM_ANONYMOUS,
+			'getTabulatorPhrases' => self::PERM_ANONYMOUS,
 		]);
 
 		$this->load->helper('hlp_language');
@@ -92,4 +94,59 @@ class Phrasen extends FHCAPI_Controller
 		$this->terminateWithSuccess($langs);
 	}
 
+	public function getPhrases()
+	{
+		$postParams = $this->getPostJSON();
+
+		$languages = $postParams->languages;
+		if (!$languages || !count($languages)) {
+			$this->load->model('system/Sprache_model', 'sprachenModel');
+			$activeLanguages = $this->sprachenModel->loadWhere(array('content' => true));
+			$activeLanguagesData = $this->getDataOrTerminateWithError($activeLanguages);
+			$languages = array_map(
+				function ($languageData) {
+					return $languageData->sprache;
+				},
+				$activeLanguagesData
+			);
+		}
+
+		$this->load->model('system/Phrase_model', 'phraseModel');
+		$phrasesGroupedByCategory = $postParams->phrasesGroupedByCategory;
+		$result = [];
+		foreach ($languages as $language) {
+			$phrases = $this->phraseModel->getPhrasesByCategoryAndPhrasesAndLanguage($phrasesGroupedByCategory, $language);
+			$result[$language] = $this->getDataOrTerminateWithError($phrases);
+		}
+
+		$this->terminateWithSuccess($result);
+	}
+
+	public function getTabulatorPhrases()
+	{
+		$languages = json_decode($this->input->get('languages'));
+		if (!$languages || !count($languages)) {
+			$this->load->model('system/Sprache_model', 'sprachenModel');
+			$activeLanguages = $this->sprachenModel->loadWhere(array('content' => true));
+			$activeLanguagesData = $this->getDataOrTerminateWithError($activeLanguages);
+			$languages = array_map(
+				function ($languageData) {
+					return $languageData->sprache;
+				},
+				$activeLanguagesData
+			);
+		}
+
+		$this->load->model('system/Phrase_model', 'phraseModel');
+		$result = [];
+		foreach ($languages as $language) {
+			$tabulatorPhrases = $this->phraseModel->getPhrasesByCategoryAndLanguage(['tabulator'], $language);
+			$result[$language] = $this->getDataOrTerminateWithError($tabulatorPhrases);
+		}
+
+		header('Pragma: private');
+		header('Cache-Control: private, max-age=' . (60 * 60 * 24 * 30));
+		$this->terminateWithSuccess($result);
+	}
+
 }

application/controllers/api/frontend/v1/Profil.php

@@ -16,7 +16,8 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-if (! defined('BASEPATH')) exit('No direct script access allowed');
+if (!defined('BASEPATH'))
+	exit('No direct script access allowed');
 
 class Profil extends FHCAPI_Controller
 {
@@ -27,13 +28,13 @@ class Profil extends FHCAPI_Controller
 	public function __construct()
 	{
 		parent::__construct([
-            'fotoSperre' => self::PERM_LOGGED,
+			'fotoSperre' => self::PERM_LOGGED,
 			'getGemeinden' => self::PERM_LOGGED,
 			'getAllNationen' => self::PERM_LOGGED,
 			'isMitarbeiter' => self::PERM_LOGGED,
 			'profilViewData' => self::PERM_LOGGED,
 		]);
-		
+
 		$this->load->library('PermissionLib');
 
 		$this->load->model('ressource/mitarbeiter_model', 'MitarbeiterModel');
@@ -48,28 +49,37 @@ class Profil extends FHCAPI_Controller
 
 	//------------------------------------------------------------------------------------------------------------------
 	// Public methods
-	public function profilViewData($uid=null){
+
+	/**
+     * retrieves view data for profile view
+     * @access public
+     * @param  $uid the userID for which profile is being viewed, null or missing value implies one's own profile
+     */
+	public function profilViewData($uid = null)
+	{
+		$authUid = getAuthUID();
+		$isProfilOfAuthUser = !$uid || $uid === $authUid;
+
 		$this->load->library('ProfilLib');
-		$editable = false;
-		if(isset($uid) && $uid != null){
-			$profil_data = $this->profillib->getView($uid);
-			if($uid == getAuthUID()){
-				$editable = true;
-			}
-		}else{
-			$editable = true;
-			$profil_data = $this->profillib->getView(getAuthUID());
+		$profileData = $this->profillib->getView($uid ?? $authUid);
+		$profileData = hasData($profileData) ? getData($profileData) : null;
+
+		$viewData = [
+			'editable' => $isProfilOfAuthUser,
+			'profil_data' => $profileData,
+			'permissions' => [
+				'basis/other_lv_plan' => $this->permissionlib->isBerechtigt(('basis/other_lv_plan'))
+			]
+		];
+
+		if ($isProfilOfAuthUser) {
+			$viewData['calendar_sync_urls'] = $this->getCalendarSyncUrlData();
 		}
-		
-		$profil_data = hasData($profil_data) ? getData($profil_data) : null;
-		$viewData = array(
-			'editable'=>$editable,
-			'profil_data' => $profil_data,
-		);
+
 		$this->terminateWithSuccess($viewData);
 	}
 
-    /**
+	/**
 	 * update column foto_sperre in public.tbl_person
 	 * @access public
 	 * @param  boolean $value  new value for the column
@@ -77,9 +87,9 @@ class Profil extends FHCAPI_Controller
 	 */
 	public function fotoSperre($value)
 	{
-        if(!isset($value)){
-            $this->terminateWithError("Missing parameter", self::ERROR_TYPE_GENERAL);
-        }
+		if (!isset($value)) {
+			$this->terminateWithError("Missing parameter", self::ERROR_TYPE_GENERAL);
+		}
 
 		$res = $this->PersonModel->update($this->pid, ["foto_sperre" => $value]);
 		if (isError($res)) {
@@ -87,10 +97,10 @@ class Profil extends FHCAPI_Controller
 		}
 		$this->PersonModel->addSelect("foto_sperre");
 		$res = $this->PersonModel->load($this->pid);
-		
-        $res = $this->getDataOrTerminateWithError($res);
-		
-        $this->terminateWithSuccess(current($res));
+
+		$res = $this->getDataOrTerminateWithError($res);
+
+		$this->terminateWithSuccess(current($res));
 	}
 
 	/**
@@ -109,7 +119,7 @@ class Profil extends FHCAPI_Controller
 		if (isError($nation_res)) {
 			$this->terminateWithError("error while trying to query table codex.tbl_nation", self::ERROR_TYPE_GENERAL);
 		}
-		
+
 		$nation_res = $this->getDataOrTerminateWithError($nation_res);
 
 		$this->terminateWithSuccess($nation_res);
@@ -117,30 +127,30 @@ class Profil extends FHCAPI_Controller
 
 	public function getGemeinden($nation, $zip)
 	{
-		if(!isset($nation) || !isset($zip)){
+		if (!isset($nation) || !isset($zip)) {
 			echo json_encode(error("Missing parameters"));
 			return;
 		}
-		
+
 		$this->load->model('codex/Gemeinde_model', "GemeindeModel");
-		
+
 
 		$gemeinde_res = $this->GemeindeModel->getGemeindeByPlz($zip);
-		
+
 		if (isError($gemeinde_res)) {
-			$this->terminateWithError(getError($gemeinde_res),self::ERROR_TYPE_GENERAL);
+			$this->terminateWithError(getError($gemeinde_res), self::ERROR_TYPE_GENERAL);
 		}
 		$gemeinde_res = $this->getDataOrTerminateWithError($gemeinde_res);
-		
+
 		/* $gemeinde_res = array_map(function ($obj) {
 			return $obj->ortschaftsname;
 		}, $gemeinde_res); */
 
-		$this->terminateWithSuccess($gemeinde_res);	
-		
+		$this->terminateWithSuccess($gemeinde_res);
+
 	}
 
-    
+
 	/**
 	 * checks whether a specific userID is a mitarbeiter or not (foreword declaration of the function isMitarbeiter in Mitarbeiter_model.php)
 	 * @access public
@@ -150,23 +160,48 @@ class Profil extends FHCAPI_Controller
 	public function isMitarbeiter($uid)
 	{
 
-		if(!$uid) $this->terminateWithError("No uid provided", self::ERROR_TYPE_GENERAL);
-		
-		
+		if (!$uid)
+			$this->terminateWithError("No uid provided", self::ERROR_TYPE_GENERAL);
+
+
 		$result = $this->MitarbeiterModel->isMitarbeiter($uid);
-		
+
 		if (isError($result)) {
 			$this->terminateWithError("error when calling Mitarbeiter_model function isMitarbeiter with uid " . $uid, self::ERROR_TYPE_GENERAL);
 		}
 
 		$result = $this->getDataOrTerminateWithError($result);
-		
+
 		$this->terminateWithSuccess($result);
 	}
 
 	// -----------------------------------------------------------------------------------------------------------------
 	// Private methods
 
-	
+	/**
+	 * gets the identifier, phrase, and url for each calendar sync option
+	 * @access private
+	 * @return array array of arrays, where each child array is a sync option
+	 */
+	private function getCalendarSyncUrlData()
+	{
+		return [
+			[
+				"identifier" => "cal_dav",
+				"labelPhrase" => "profil/calendar_sync_cal_dav",
+				"url" => APP_ROOT . "webdav/lvplan.php/calendars/" . $this->uid . "/LVPlan-" . $this->uid,
+			],
+			[
+				"identifier" => "cal_dav_principal",
+				"labelPhrase" => "profil/calendar_sync_cal_dav_principal",
+				"url" => APP_ROOT . "webdav/lvplan.php/principals/" . $this->uid,
+			],
+			[
+				"identifier" => "i_cal",
+				"labelPhrase" => "profil/calendar_sync_i_cal",
+				"url" => APP_ROOT . "webdav/google.php?cal=" . encryptData($this->uid, LVPLAN_CYPHER_KEY) . "&" . microtime(true),
+			],
+		];
+	}
 }
 

application/controllers/api/frontend/v1/RendererLoader.php

@@ -31,7 +31,7 @@ class RendererLoader extends FHCAPI_Controller
 
 		parent::__construct([
 			'GetRenderers' => self::PERM_LOGGED,
-           
+			'GetTempusRenderers' => self::PERM_LOGGED,
 		]);
 
         $this->load->library('LogLib');
@@ -66,6 +66,26 @@ class RendererLoader extends FHCAPI_Controller
 		$this->terminateWithSuccess($renderer_paths);
 	}
 
+	public function GetTempusRenderers(){
+		$renderer_paths = [];
+		Events::trigger(
+				'loadRenderers',
+				function & () use (&$renderer_paths)
+				{
+					return $renderer_paths;
+				}
+			);
+
+		Events::trigger(
+				'loadTempusRenderers',
+				function & () use (&$renderer_paths)
+				{
+					return $renderer_paths;
+				}
+			);
+		$this->terminateWithSuccess($renderer_paths);
+	}
+
 	
 	
 

application/controllers/api/frontend/v1/StgOrgLvPlan.php

@@ -0,0 +1,64 @@
+<?php
+/**
+ * Copyright (C) 2024 fhcomplete.org
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+if (!defined('BASEPATH'))
+    exit('No direct script access allowed');
+
+class StgOrgLvPlan extends FHCAPI_Controller
+{
+
+    /**
+     * Object initialization
+     */
+    public function __construct()
+    {
+        parent::__construct([
+			'stgOrgLvPlanViewData' => self::PERM_LOGGED,
+        ]);
+
+    }
+
+    //------------------------------------------------------------------------------------------------------------------
+    // Public methods
+
+    /**
+	 * fetches view data for stg org lv plan
+	 * @access public
+	 */
+	public function stgOrgLvPlanViewData()
+	{
+		$this->load->model('organisation/Studiengang_model', 'StudiengangModel');
+		$this->StudiengangModel->addOrder('typ');
+		$this->StudiengangModel->addOrder('kurzbz');
+		$result = $this->StudiengangModel->loadWhere([
+			'aktiv' => true
+		]);
+		$studiengaenge = $this->getDataOrTerminateWithError($result);
+
+		$viewData = array(
+			'studiengaenge' => $studiengaenge,
+		);
+
+        $this->terminateWithSuccess($viewData);
+	}
+
+    // -----------------------------------------------------------------------------------------------------------------
+    // Private methods
+
+}
+

application/controllers/api/frontend/v1/Studium.php

@@ -62,21 +62,36 @@ class Studium extends FHCAPI_Controller
 
 		if($this->getDataOrTerminateWithError($this->StudentModel->isStudent(getAuthUID()))){
 			$studentLehrverband =$this->StudentlehrverbandModel->loadWhere(["student_uid" => getAuthUID(), "studiensemester_kurzbz" => $aktuelles_studiensemester->studiensemester_kurzbz]);
-			$studentLehrverband = current($this->getDataOrTerminateWithError($studentLehrverband));
-			
-			$student_studiensemester = $studentLehrverband->studiensemester_kurzbz;
-			$student_studiengang = $studentLehrverband->studiengang_kz;
-			$student_semester = $studentLehrverband->semester;
+
+			//TODO(Manu) check if use Fallback or just comment out all paramschecks?
+			//add Fallback: if no LehrverbandData of actual semester, get Data of previous one
+			if(!hasData($studentLehrverband))
+			{
+				$result= $this->StudiensemesterModel->getPreviousFrom($aktuelles_studiensemester->studiensemester_kurzbz);
+
+				$data = $this->getDataOrTerminateWithError($result);
+				$vorheriges_studiensemester = current($data)->studiensemester_kurzbz;
+				$studentLehrverband =$this->StudentlehrverbandModel->loadWhere(["student_uid" => getAuthUID(), "studiensemester_kurzbz" => $vorheriges_studiensemester]);
+			}
+			$studentLehrverband = current(getData($studentLehrverband));
+
 			$student_studienplan = $this->getStudienPlanFromPrestudentStatus(getAuthPersonId())->studienplan_id;
 			
-			if(!isset($parameter_studiensemester))
-			$parameter_studiensemester = $student_studiensemester;
-			if(!isset($parameter_studiengang))
-			$parameter_studiengang = $student_studiengang;
-			if(!isset($parameter_semester))
-			$parameter_semester = $student_semester;
+			if(!isset($parameter_studiensemester)) {
+				$student_studiensemester = $studentLehrverband->studiensemester_kurzbz;
+				$parameter_studiensemester = $student_studiensemester;
+			}
+			if(!isset($parameter_studiengang)) {
+				$student_studiengang = $studentLehrverband->studiengang_kz;
+				$parameter_studiengang = $student_studiengang;
+			}
+			if(!isset($parameter_semester)) {
+				$student_semester = $studentLehrverband->semester;
+				$parameter_semester = $student_semester;
+			}
 			if(!isset($parameter_studienplan))
-			$parameter_studienplan = $student_studienplan;
+				$parameter_studienplan = $student_studienplan;
+
 		}  
 
 		if(isset($parameter_studiensemester)){
@@ -96,8 +111,7 @@ class Studium extends FHCAPI_Controller
 
 		// fetch studiensemester
 		$allStudienSemester = $this->getDataOrTerminateWithError($this->StudiensemesterModel->load());
-		
-		
+
 		if(isset($parameter_studiensemester) && !empty(array_filter($allStudienSemester, function($studiensemester) use($parameter_studiensemester){
 			return $studiensemester->studiensemester_kurzbz == $parameter_studiensemester->studiensemester_kurzbz;
 		}))){
@@ -216,6 +230,8 @@ class Studium extends FHCAPI_Controller
 		$studienplaene = array_map(function($studienplan){
 			$orgform = current($this->getDataOrTerminateWithError($this->OrgformModel->loadWhere(["orgform_kurzbz" => $studienplan->orgform_kurzbz])));
 			$studienplan->orgform_bezeichnung = $orgform->bezeichnung;
+			// bezeichnung_mehrsprachig
+			$studienplan->orgform_bezeichnung_english = $orgform->bezeichnung_mehrsprachig[1];
 			return $studienplan;
 		},$studienplaene);
 		return $studienplaene;

application/controllers/api/frontend/v1/dashboard/Board.php

@@ -0,0 +1,142 @@
+<?php
+/**
+ * Copyright (C) 2026 fhcomplete.org
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * This controller operates between (interface) the JS (GUI) and the back-end
+ * Provides data to the ajax get calls about addresses
+ * This controller works with JSON calls on the HTTP GET or POST and the output is always JSON
+ */
+class Board extends FHCAPI_Controller
+{
+	public function __construct()
+	{
+		parent::__construct([
+			'list'					=> 'dashboard/admin:r',
+			'create'				=> 'dashboard/admin:rw',
+			'update'				=> 'dashboard/admin:rw',
+			'delete'				=> 'dashboard/admin:rw'
+		]);
+
+		// Models
+		$this->load->model('dashboard/Dashboard_model', 'DashboardModel');
+	}
+
+	public function list()
+	{
+		$this->DashboardModel->addSelect('dashboard_id');
+		$this->DashboardModel->addSelect('dashboard_kurzbz');
+		$this->DashboardModel->addSelect('tbl_dashboard.beschreibung');
+		$this->DashboardModel->addSelect("(
+			SELECT json_agg(w.*) 
+			FROM dashboard.tbl_widget w 
+			JOIN dashboard.tbl_dashboard_widget dw 
+			USING(widget_id) 
+			WHERE dw.dashboard_id=tbl_dashboard.dashboard_id
+		) AS \"widgetSetup\"");
+
+		$result = $this->DashboardModel->load();
+
+		$data = $this->getDataOrTerminateWithError($result);
+
+		$data = array_map(function ($dashboard) {
+			$tmpSetups = json_decode($dashboard->widgetSetup);
+			$tmpSetups = array_map(function ($widget) {
+				$widget->setup->file = absoluteJsImportUrl($widget->setup->file);
+				return $widget;
+			}, $tmpSetups);
+			$dashboard->widgetSetup = $tmpSetups;
+			return $dashboard;
+		}, $data);
+
+		$this->terminateWithSuccess($data);
+	}
+
+	public function create()
+	{
+		$dashboard_kurzbz = $this->input->post('dashboard_kurzbz');
+		
+		$result = $this->DashboardModel->insert([
+			'dashboard_kurzbz' => $dashboard_kurzbz
+		]);
+
+		$data = $this->getDataOrTerminateWithError($result);
+
+		$this->terminateWithSuccess($data);
+	}
+
+	public function update()
+	{
+		$this->load->library('form_validation');
+
+		$this->form_validation->set_rules('dashboard_id', 'Dashboard ID', 'required');
+
+		if (!$this->form_validation->run())
+			$this->terminateWithValidationErrors($this->form_validation->error_array());
+
+		$dashboard_id = $this->input->post('dashboard_id');
+		$dashboard_kurzbz = $this->input->post('dashboard_kurzbz');
+		$beschreibung = $this->input->post('beschreibung');
+
+		$result = $this->DashboardModel->update([
+			'dashboard_id' => $dashboard_id
+		], [
+			'dashboard_kurzbz' => $dashboard_kurzbz,
+			'beschreibung' => $beschreibung
+		]);
+
+		$data = $this->getDataOrTerminateWithError($result);
+
+		$this->terminateWithSuccess($data);
+	}
+
+	public function delete()
+	{
+		$this->load->library('form_validation');
+
+		$this->form_validation->set_rules('dashboard_id', 'Dashboard ID', 'required');
+
+		if (!$this->form_validation->run())
+			$this->terminateWithValidationErrors($this->form_validation->error_array());
+
+		$dashboard_id = $this->input->post('dashboard_id');
+
+		//delete all presets
+		$this->load->model('dashboard/Dashboard_Preset_model', 'DashboardPresetModel');
+
+		$result = $this->DashboardPresetModel->delete([
+			'dashboard_id' => $dashboard_id
+		]);
+		$this->getDataOrTerminateWithError($result);
+
+		//delete all widgets
+		$this->load->model('dashboard/Dashboard_Widget_model', 'DashboardWidgetModel');
+
+		$result = $this->DashboardWidgetModel->delete([
+			'dashboard_id' => $dashboard_id
+		]);
+		$this->getDataOrTerminateWithError($result);
+
+		$result = $this->DashboardModel->delete($dashboard_id);
+
+		$data = $this->getDataOrTerminateWithError($result);
+
+		$this->terminateWithSuccess($data);
+	}
+}

application/controllers/api/frontend/v1/dashboard/Preset.php

@@ -0,0 +1,199 @@
+<?php
+/**
+ * Copyright (C) 2026 fhcomplete.org
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * This controller operates between (interface) the JS (GUI) and the back-end
+ * Provides data to the ajax get calls about addresses
+ * This controller works with JSON calls on the HTTP GET or POST and the output is always JSON
+ */
+class Preset extends FHCAPI_Controller
+{
+	public function __construct()
+	{
+		parent::__construct([
+			'list'					=> 'dashboard/admin:r',
+			'getBatch'				=> 'dashboard/admin:r',
+			'addWidget'				=> 'dashboard/admin:rw',
+			'removeWidget'			=> 'dashboard/admin:rw'
+		]);
+
+		// Load language phrases
+		$this->loadPhrases([
+			'ui'
+		]);
+
+		// Libraries
+		$this->load->library('dashboard/DashboardLib');
+
+		// Models
+		$this->load->model('ressource/Funktion_model', 'FunktionModel');
+	}
+
+	public function list($dashboard_kurzbz)
+	{
+		$sql = "
+			WITH
+			dashboard_presets AS (
+				SELECT
+					*
+				FROM
+					dashboard.tbl_dashboard_preset dp
+				JOIN
+					dashboard.tbl_dashboard d ON d.dashboard_id = dp.dashboard_id
+				WHERE
+					d.dashboard_kurzbz = {$this->db->escape($dashboard_kurzbz)}
+			),
+			general AS 	(
+				SELECT
+					'general' AS funktion_kurzbz,
+					'Allgemein' AS beschreibung
+			)
+
+			(
+				SELECT
+					f.funktion_kurzbz,
+					f.beschreibung,
+					COUNT(p.preset_id) AS has_preset
+				FROM
+					general f
+				LEFT JOIN
+					dashboard_presets p ON p.funktion_kurzbz IS NULL
+				GROUP BY
+					f.funktion_kurzbz, f.beschreibung
+			)
+			UNION ALL
+			(
+				SELECT
+					f.funktion_kurzbz,
+					f.beschreibung,
+					COUNT(p.preset_id) AS has_preset
+				FROM
+					public.tbl_funktion f
+				LEFT JOIN
+					dashboard_presets p ON p.funktion_kurzbz = f.funktion_kurzbz
+				GROUP BY
+					f.funktion_kurzbz, f.beschreibung
+				ORDER BY
+					f.beschreibung ASC
+			)
+		";
+
+		$result = $this->FunktionModel->execReadOnlyQuery($sql);
+
+		$funktionen = $this->getDataOrTerminateWithError($result);
+
+		$this->terminateWithSuccess($funktionen);
+	}
+
+	public function getBatch()
+	{
+		$this->load->library('form_validation');
+
+		$this->form_validation->set_rules('db', 'Dashboard', 'required');
+
+		if (!$this->form_validation->run())
+			$this->terminateWithValidationErrors($this->form_validation->error_array());
+
+		$db = $this->input->post('db');
+		$funktionen = $this->input->post('funktionen') ?: [];
+
+		$result = [];
+
+		foreach ($funktionen as $funktion) {
+			$conf = $this->dashboardlib->getPreset($db, $funktion);
+			if ($conf) {
+				$preset = json_decode($conf->preset, true);
+				$result[$funktion] = $preset;
+			} else {
+				$result[$funktion] = [];
+			}
+		}
+
+		return $this->terminateWithSuccess($result);
+	}
+
+	public function addWidget()
+	{
+		$this->load->library('form_validation');
+
+		$this->form_validation->set_rules('dashboard', 'Dashboard', 'required');
+		$this->form_validation->set_rules('funktion_kurzbz', 'Funktion', 'required');
+		$this->form_validation->set_rules('widget[widget]', 'Widget', 'required');
+
+		if (!$this->form_validation->run())
+			$this->terminateWithValidationErrors($this->form_validation->error_array());
+
+		$dashboard_kurzbz = $this->input->post('dashboard');
+		$funktion_kurzbz = $this->input->post('funktion_kurzbz');
+		$widget = $this->input->post('widget');
+
+		if (!isset($widget['widgetid']))
+			$widget['widgetid'] = $this->dashboardlib->generateWidgetId($dashboard_kurzbz);
+
+		$preset = $this->dashboardlib->getPresetOrCreateEmptyPreset($dashboard_kurzbz, $funktion_kurzbz);
+
+		$preset_decoded = json_decode($preset->preset, true);
+		
+		$preset_decoded[$widget['widgetid']] = $widget;
+
+		$preset->preset = json_encode($preset_decoded);
+
+		$result = $this->dashboardlib->insertOrUpdatePreset($preset);
+
+		$this->getDataOrTerminateWithError($result);
+
+		$this->terminateWithSuccess($widget['widgetid']);
+	}
+
+	public function removeWidget()
+	{
+		$this->load->library('form_validation');
+
+		$this->form_validation->set_rules('db', 'Dashboard', 'required');
+		$this->form_validation->set_rules('funktion_kurzbz', 'Funktion', 'required');
+		$this->form_validation->set_rules('widgetid', 'Widget', 'required');
+
+		if (!$this->form_validation->run())
+			$this->terminateWithValidationErrors($this->form_validation->error_array());
+
+		$dashboard_kurzbz = $this->input->post('db');
+		$funktion_kurzbz = $this->input->post('funktion_kurzbz');
+		$widgetid = $this->input->post('widgetid');
+
+		$preset = $this->dashboardlib->getPreset($dashboard_kurzbz, $funktion_kurzbz);
+		if (!$preset)
+			show_404();
+
+		$preset_decoded = json_decode($preset->preset, true);
+
+		if (!isset($preset_decoded[$widgetid]))
+			show_404();
+		
+		unset($preset_decoded[$widgetid]);
+
+		$preset->preset = json_encode($preset_decoded);
+
+		$result = $this->dashboardlib->insertOrUpdatePreset($preset);
+
+		$this->getDataOrTerminateWithError($result);
+
+		$this->terminateWithSuccess(array('msg' => $this->p->t('dashboard', 'success_savePreset')));
+	}
+}

application/controllers/api/frontend/v1/dashboard/User.php

@@ -0,0 +1,124 @@
+<?php
+/**
+ * Copyright (C) 2026 fhcomplete.org
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * This controller operates between (interface) the JS (GUI) and the back-end
+ * Provides data to the ajax get calls about the users dashboard
+ * This controller works with JSON calls on the HTTP GET or POST and the output is always JSON
+ */
+class User extends FHCAPI_Controller
+{
+	public function __construct()
+	{
+		parent::__construct([
+			'get'							=> 'dashboard/benutzer:r',
+			'addWidget'						=> 'dashboard/benutzer:rw',
+			'removeWidget'					=> 'dashboard/benutzer:rw'
+		]);
+
+		// Libraries
+		$this->load->library('dashboard/DashboardLib');
+
+		// Models
+		$this->load->model('ressource/Funktion_model', 'FunktionModel');
+	}
+
+	public function get($dashboard_kurzbz)
+	{
+		$dashboard = $this->dashboardlib->getDashboardByKurzbz($dashboard_kurzbz);
+		if (!$dashboard)
+			show_404();
+		
+		$uid = $this->authlib->getAuthObj()->username;
+
+		$mergedconfig = $this->dashboardlib->getMergedUserConfig($dashboard->dashboard_id, $uid);
+
+		$this->terminateWithSuccess($mergedconfig);
+	}
+
+	public function addWidget()
+	{
+		$this->load->library('form_validation');
+
+		$this->form_validation->set_rules('dashboard', 'Dashboard', 'required');
+		$this->form_validation->set_rules('widget[widget]', 'Widget', 'required');
+
+		if (!$this->form_validation->run())
+			$this->terminateWithValidationErrors($this->form_validation->error_array());
+
+		$widget = $this->input->post('widget');
+		$dashboard_kurzbz = $this->input->post('dashboard');
+		$uid = $this->authlib->getAuthObj()->username;
+		
+		if (!isset($widget['widgetid']))
+			$widget['widgetid'] = $this->dashboardlib->generateWidgetId($dashboard_kurzbz);
+
+		if (isset($widget['source']))
+			unset($widget['source']);
+
+		$override = $this->dashboardlib->getOverrideOrCreateEmptyOverride($dashboard_kurzbz, $uid);
+
+		$override_decoded = json_decode($override->override, true);
+
+		$override_decoded[$widget['widgetid']] = $widget;
+
+		$override->override = json_encode($override_decoded);
+				
+		$result = $this->dashboardlib->insertOrUpdateOverride($override);
+
+		$this->getDataOrTerminateWithError($result);
+		
+		$this->terminateWithSuccess($widget['widgetid']);
+	}
+
+	public function removeWidget()
+	{
+		$this->load->library('form_validation');
+
+		$this->form_validation->set_rules('dashboard', 'Dashboard', 'required');
+		$this->form_validation->set_rules('widget', 'Widget', 'required');
+
+		if (!$this->form_validation->run())
+			$this->terminateWithValidationErrors($this->form_validation->error_array());
+
+		$widget_id = $this->input->post('widget');
+		$dashboard_kurzbz = $this->input->post('dashboard');
+		$uid = $this->authlib->getAuthObj()->username;
+		
+		$override = $this->dashboardlib->getOverride($dashboard_kurzbz, $uid);
+		if (!$override)
+			show_404();
+		
+		$override_decoded = json_decode($override->override, true);
+
+		if (!isset($override_decoded[$widget_id]))
+			show_404();
+		
+		unset($override_decoded[$widget_id]);
+
+		$override->override = json_encode($override_decoded);
+				
+		$result = $this->dashboardlib->insertOrUpdateOverride($override);
+
+		$this->getDataOrTerminateWithError($result);
+		
+		$this->terminateWithSuccess();
+	}
+}

application/controllers/api/frontend/v1/dashboard/Widget.php

@@ -0,0 +1,137 @@
+<?php
+/**
+ * Copyright (C) 2026 fhcomplete.org
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * This controller operates between (interface) the JS (GUI) and the back-end
+ * Provides data to the ajax get calls about the users dashboard
+ * This controller works with JSON calls on the HTTP GET or POST and the output is always JSON
+ */
+class Widget extends FHCAPI_Controller
+{
+	public function __construct()
+	{
+		parent::__construct([
+			'get'							=> ['dashboard/benutzer:r', 'dashboard/admin:r'],
+			'list'							=> 'dashboard/admin:r',
+			'listAllowed'					=> ['dashboard/benutzer:rw', 'dashboard/admin:r'],
+			'setAllowed'					=> 'dashboard/admin:rw'
+		]);
+
+		// Libraries
+		$this->load->library('dashboard/DashboardLib');
+
+		// Models
+		$this->load->model('dashboard/Widget_model', 'WidgetModel');
+	}
+
+	public function get($id)
+	{
+		$result = $this->WidgetModel->load($id);
+
+		$widget = $this->getDataOrTerminateWithError($result);
+
+		if (!$widget)
+			return $this->terminateWithSuccess([
+				"widget_id" => 0,
+				"widget_kurzbz" => "notfound",
+				"arguments" => [
+					"className" => 'alert-danger',
+					"title" => 'Widget Not Found',
+					"msg" => 'The widget with the id ' . $id . ' could not be found'
+				],
+				"setup" => [
+					"name" => 'Widget Not Found',
+					"file" => absoluteJsImportUrl('public/js/components/DashboardWidget/Default.js'),
+					"width" => 1,
+					"height" => 1
+				]
+			]);
+
+		$widget = current($widget);
+		$widget->arguments = json_decode($widget->arguments);
+		$tmpsetup = json_decode($widget->setup);
+		$tmpsetup->file = absoluteJsImportUrl($tmpsetup->file);
+		$widget->setup = $tmpsetup;
+
+		$this->terminateWithSuccess($widget);
+	}
+
+	public function list($dashboard)
+	{
+		$result = $this->WidgetModel->getWithAllowedForDashboard($dashboard);
+
+		$widgets = $this->getDataOrTerminateWithError($result);
+
+		$widgets = array_map(function ($widget) {
+			$widget->arguments = json_decode($widget->arguments);
+			$tmpsetup = json_decode($widget->setup);
+			$tmpsetup->file = absoluteJsImportUrl($tmpsetup->file);
+			$widget->setup = $tmpsetup;
+			return $widget;
+		}, $widgets);
+
+		$this->terminateWithSuccess($widgets);
+	}
+
+	public function listAllowed($dashboard)
+	{
+		$result = $this->WidgetModel->getForDashboard($dashboard);
+
+		$widgets = $this->getDataOrTerminateWithError($result);
+
+		$widgets = array_map(function ($widget) {
+			$widget->arguments = json_decode($widget->arguments);
+			$tmpsetup = json_decode($widget->setup);
+			$tmpsetup->file = absoluteJsImportUrl($tmpsetup->file);
+			$widget->setup = $tmpsetup;
+			return $widget;
+		}, $widgets);
+
+		$this->terminateWithSuccess($widgets);
+	}
+
+	public function setAllowed()
+	{
+		$this->load->library('form_validation');
+
+		$this->form_validation->set_rules('dashboard_id', 'Dashboard', 'required');
+		$this->form_validation->set_rules('widget_id', 'Widget', 'required');
+		$this->form_validation->set_rules('allowed', 'Allowed', 'is_bool');
+
+		if (!$this->form_validation->run())
+			$this->terminateWithValidationErrors($this->form_validation->error_array());
+
+		$data = [
+			'dashboard_id' => $this->input->post('dashboard_id'),
+			'widget_id' => $this->input->post('widget_id')
+		];
+
+		$this->load->model('dashboard/Dashboard_Widget_model', 'DashboardWidgetModel');
+		
+		if ($this->input->post('allowed'))
+			$result = $this->DashboardWidgetModel->insert($data);
+		else
+			$result = $this->DashboardWidgetModel->delete($data);
+
+		$data = $this->getDataOrTerminateWithError($result);
+
+		$this->terminateWithSuccess($data);
+	}
+}

application/controllers/api/frontend/v1/lv/Gruppe.php

@@ -118,54 +118,17 @@ class Gruppe extends FHCAPI_Controller
 
 		$query_words = explode(' ', $query);
 
-		$this->_ci->GruppeModel->addSelect('gruppe_kurzbz,
-											studiengang_kz,
-											semester,
-											bezeichnung,
-											gid,
-											\'false\' as lehrverband');
-		$this->_ci->GruppeModel->db->where(array('sichtbar' => true, 'aktiv' => true, 'lehre' => true, 'direktinskription' => false, 'semester IS NOT NULL' => null));
-		$this->_ci->GruppeModel->db->group_start();
-		foreach ($query_words as $word)
-		{
-			$this->_ci->GruppeModel->db->group_start();
-			$this->_ci->GruppeModel->db->where('gruppe_kurzbz ILIKE', "%" . $word . "%");
-			$this->_ci->GruppeModel->db->or_where('bezeichnung ILIKE', "%" . $word . "%");
-			$this->_ci->GruppeModel->db->group_end();
-		}
-		$this->_ci->GruppeModel->db->group_end();
-
-		$gruppen_result = $this->_ci->GruppeModel->load();
-
-		$gruppen_array = array();
+		$gruppen_result = $this->_ci->GruppeModel->search($query_words);
 
 		if (isError($gruppen_result))
 			$this->terminateWithError(getError($gruppen_result), self::ERROR_TYPE_GENERAL);
 
+		$gruppen_array = array();
+
 		if (hasData($gruppen_result))
 			$gruppen_array = getData($gruppen_result);
 
-		$this->_ci->LehrverbandModel->addSelect('CONCAT(UPPER(CONCAT(typ, kurzbz)), \'\', semester, verband, COALESCE(gruppe,\'\')) as gruppe_kurzbz,
-												studiengang_kz,
-												semester,
-												tbl_lehrverband.bezeichnung,
-												gid,
-												\'true\' as lehrverband');
-		$this->_ci->LehrverbandModel->addJoin('public.tbl_studiengang', 'studiengang_kz');
-		$this->_ci->LehrverbandModel->addOrder('verband');
-		$this->_ci->LehrverbandModel->addOrder('gruppe');
-		$this->_ci->LehrverbandModel->db->where(array('tbl_lehrverband.aktiv' => true));
-
-		$this->_ci->LehrverbandModel->db->group_start();
-		foreach ($query_words as $word)
-		{
-			$this->_ci->LehrverbandModel->db->group_start();
-			$this->_ci->LehrverbandModel->db->where('CONCAT(CONCAT(typ, kurzbz), \'\', semester, verband, COALESCE(gruppe,\'\')) ILIKE', "%" . $word . "%");
-			$this->_ci->LehrverbandModel->db->or_where('tbl_lehrverband.bezeichnung ILIKE', "%" . $word . "%");
-			$this->_ci->LehrverbandModel->db->group_end();
-		}
-		$this->_ci->LehrverbandModel->db->group_end();
-		$lehrverband_result = $this->_ci->LehrverbandModel->load();
+		$lehrverband_result = $this->_ci->LehrverbandModel->search($query_words);
 
 		$lehrverband_array = array();
 

application/controllers/api/frontend/v1/lv/StgTree.php

@@ -25,7 +25,25 @@ class StgTree extends FHCAPI_Controller
 			return $this->_outputAuthError([$method => ['admin:r', 'assistenz:r']]);
 		}
 
-		return $this->getStudiengang($method);
+		$count = count($params);
+		if (!$count)
+			return $this->getStudiengang($method);
+
+		if ($count == 1) {
+			if (is_numeric($params[0]))
+				return $this->getSemester($method, $params[0]);
+			else
+				return $this->getStudiengang($method, $params[0]);
+		}
+		if ($count == 2) {
+			if (is_numeric($params[0]))
+				return $this->getVerband($method, $params[0], $params[1]);
+			else
+				return $this->getSemester($method, $params[1], $params[0]);
+		}
+
+
+
 		show_404();
 	}
 
@@ -64,16 +82,27 @@ class StgTree extends FHCAPI_Controller
 		$this->terminateWithSuccess($list);
 	}
 
-	protected function getStudiengang($studiengang_kz)
+	protected function getStudiengang($studiengang_kz, $org_form = null)
 	{
 		$link = $studiengang_kz . '/';
+		if ($org_form !== null)
+			$link .= $org_form . '/';
 
 		$this->StudiengangModel->addJoin('public.tbl_lehrverband v', 'studiengang_kz');
 
 		$this->StudiengangModel->addDistinct();
 		$this->StudiengangModel->addSelect("CONCAT(" . $this->StudiengangModel->escape($link) . ", semester) AS link", false);
-		$this->StudiengangModel->addSelect("CONCAT(UPPER(CONCAT(typ, kurzbz)), '-', semester, (SELECT CASE WHEN bezeichnung IS NULL OR bezeichnung='' THEN ''::TEXT ELSE CONCAT(' (', bezeichnung, ')') END FROM public.tbl_lehrverband WHERE studiengang_kz=v.studiengang_kz AND semester=v.semester ORDER BY verband, gruppe LIMIT 1)) AS name", false);
-		$this->StudiengangModel->addSelect("TRUE AS leaf", false);
+		$this->StudiengangModel->addSelect("CONCAT(
+			UPPER(CONCAT(typ, kurzbz)), 
+			'-', 
+			semester, 
+			(
+				SELECT CASE WHEN bezeichnung IS NULL OR bezeichnung='' THEN ''::TEXT ELSE CONCAT(' (', bezeichnung, ')') END 
+				FROM public.tbl_lehrverband 
+				WHERE studiengang_kz=v.studiengang_kz AND semester=v.semester 
+				ORDER BY verband, gruppe LIMIT 1
+			)
+		) AS name", false);
 
 		$this->StudiengangModel->addSelect('semester');
 		$this->StudiengangModel->addSelect($this->StudiengangModel->escape($studiengang_kz) . '::integer AS stg_kz', false);
@@ -97,6 +126,8 @@ class StgTree extends FHCAPI_Controller
 				$this->StudienordnungModel->addDistinct();
 				$this->StudienordnungModel->addSelect("CONCAT(studiengang_kz, '/', p.orgform_kurzbz) AS link");
 				$this->StudienordnungModel->addSelect("p.orgform_kurzbz AS name");
+				$this->StudienordnungModel->addSelect("p.orgform_kurzbz AS orgform_kurzbz");
+				$this->StudienordnungModel->addSelect("studiengang_kz AS stg_kz");
 				$this->StudienordnungModel->addSelect("TRUE as leaf", false);
 
 				$this->StudienordnungModel->addJoin('lehre.tbl_studienplan p', 'studienordnung_id');
@@ -111,6 +142,115 @@ class StgTree extends FHCAPI_Controller
 				$list = array_merge($list, $result);
 			}
 		}
+		$this->terminateWithSuccess($list);
+	}
+
+	protected function getSemester($studiengang_kz, $semester, $org_form = null)
+	{
+		$link = $studiengang_kz . '/';
+		if ($org_form !== null)
+			$link .= $org_form . '/';
+		$link .= $semester . '/';
+
+
+		$this->load->model('organisation/Gruppe_model', 'GruppeModel');
+
+		$this->GruppeModel->addDistinct();
+		$this->GruppeModel->addSelect("CONCAT(" . $this->GruppeModel->escape($link . 'grp/') . ", gruppe_kurzbz) AS link", false);
+		$this->GruppeModel->addSelect("CONCAT(gruppe_kurzbz, ' (', bezeichnung, ')') AS name", false);
+		$this->GruppeModel->addSelect("TRUE AS leaf", false);
+
+		$this->GruppeModel->addSelect('sort');
+		$this->GruppeModel->addSelect('gruppe_kurzbz');
+		$this->GruppeModel->addSelect($this->GruppeModel->escape($studiengang_kz) . '::integer AS stg_kz', false);
+
+		$this->GruppeModel->addOrder('sort');
+		$this->GruppeModel->addOrder('gruppe_kurzbz');
+
+		$where = [
+			'studiengang_kz' => $studiengang_kz,
+			'semester' => $semester,
+			'lehre' => true,
+			'sichtbar' => true,
+			'aktiv' => true,
+			'direktinskription' => false
+		];
+
+		if ($org_form !== null)
+			$where['orgform_kurzbz'] = $org_form;
+
+		$result = $this->GruppeModel->loadWhere($where);
+
+		$list = $this->getDataOrTerminateWithError($result);
+
+		$this->StudiengangModel->addJoin('public.tbl_lehrverband v', 'studiengang_kz');
+
+		$this->StudiengangModel->addSelect("CONCAT(" . $this->StudiengangModel->escape($link) . ", verband) AS link", false);
+		$this->StudiengangModel->addSelect("CONCAT(UPPER(CONCAT(typ, kurzbz)), '-', semester, verband, (SELECT CASE WHEN bezeichnung IS NULL OR bezeichnung='' THEN ''::TEXT ELSE CONCAT(' (', bezeichnung, ')') END FROM public.tbl_lehrverband WHERE studiengang_kz=v.studiengang_kz AND semester=v.semester AND verband=v.verband ORDER BY gruppe LIMIT 1)) AS name", false);
+		$this->StudiengangModel->addSelect("CASE WHEN MAX(gruppe)='' OR MAX(gruppe)=' ' THEN TRUE ELSE FALSE END AS leaf");
+
+		$this->StudiengangModel->addSelect($this->StudiengangModel->escape($semester) . ' AS semester');
+		$this->StudiengangModel->addSelect('verband');
+		$this->StudiengangModel->addSelect($this->StudiengangModel->escape($studiengang_kz) . '::integer AS stg_kz', false);
+
+		$this->StudiengangModel->addOrder('verband');
+
+		$this->StudiengangModel->addGroupBy('link, name, verband');
+
+		$where = [
+			'v.studiengang_kz' => $studiengang_kz,
+			'v.semester' => $semester,
+			'v.verband !=' => '',
+			'v.aktiv' => true
+		];
+
+		if ($org_form !== null && $semester) // NOTE(chris): on semester 0 show all?
+			$where['v.orgform_kurzbz'] = $org_form;
+
+		$result = $this->StudiengangModel->loadWhere($where);
+		$result = $this->getDataOrTerminateWithError($result);
+
+		$list = array_merge($list, $result);
+
+		$this->terminateWithSuccess($list);
+	}
+
+	protected function getVerband($studiengang_kz, $semester, $verband, $org_form = null)
+	{
+		$link = $studiengang_kz . '/';
+		if ($org_form !== null)
+			$link .= $org_form . '/';
+		$link .= $semester . '/'. $verband . '/';
+
+
+		$this->StudiengangModel->addJoin('public.tbl_lehrverband v', 'studiengang_kz');
+
+		$this->StudiengangModel->addDistinct();
+		$this->StudiengangModel->addSelect("CONCAT(" . $this->StudiengangModel->escape($link) . ", gruppe) AS link", false);
+		$this->StudiengangModel->addSelect("CONCAT(UPPER(CONCAT(typ, kurzbz)), '-', semester, verband, gruppe, (SELECT CASE WHEN bezeichnung IS NULL OR bezeichnung='' THEN ''::TEXT ELSE CONCAT(' (', bezeichnung, ')') END FROM public.tbl_lehrverband WHERE studiengang_kz=v.studiengang_kz AND semester=v.semester AND verband=v.verband AND gruppe=v.gruppe ORDER BY gruppe LIMIT 1)) AS name", false);
+		$this->StudiengangModel->addSelect("TRUE AS leaf", false);
+
+		$this->StudiengangModel->addSelect('v.semester');
+		$this->StudiengangModel->addSelect('v.verband');
+		$this->StudiengangModel->addSelect('gruppe');
+		$this->StudiengangModel->addSelect($this->StudiengangModel->escape($studiengang_kz) . '::integer AS stg_kz', false);
+
+		$this->StudiengangModel->addOrder('gruppe');
+
+		$where = [
+			'v.studiengang_kz' => $studiengang_kz,
+			'v.semester' => $semester,
+			'v.verband' => $verband,
+			'v.gruppe !=' => '',
+			'v.aktiv' => true
+		];
+
+		if ($org_form !== null && $semester)
+			$where['v.orgform_kurzbz'] = $org_form;
+
+		$result = $this->StudiengangModel->loadWhere($where);
+
+		$list = $this->getDataOrTerminateWithError($result);
 
 		$this->terminateWithSuccess($list);
 	}

application/controllers/api/frontend/v1/messages/Messages.php

@@ -42,14 +42,22 @@ class Messages extends FHCAPI_Controller
 		]);
 	}
 
-	public function getMessages($id, $type_id, $size, $page)
+	public function getMessages($id, $type_id, $size=null, $page=null)
 	{
 		if($type_id != 'person_id'){
 			$id = $this->_getPersonId($id, $type_id);
 		}
 
-		$offset = $size * ($page - 1);
-		$limit = $size;
+		if(!(is_null($size) && is_null($page)))
+		{
+			$offset = $size * ($page - 1);
+			$limit = $size;
+		}
+		else
+		{
+			$offset = null;
+			$limit = null;
+		}
 
 		$result = $this->MessageModel->getMessagesForTable($id, $offset, $limit);
 

application/controllers/api/frontend/v1/stv/Dokumente.php

@@ -78,52 +78,32 @@ class Dokumente extends FHCAPI_Controller
 			$this->terminateWithError($this->p->t('ui', 'errorMissingValue', ['value' => 'Studiengang_kz']), self::ERROR_TYPE_GENERAL);
 
 		$resultPreDoc = $this->_getPrestudentDokumente($prestudent_id);
-
-		$arrayAccepted = [];
 		$person_id = $this->_getPersonId($prestudent_id);
 
-		$docNames = array_map(function ($item) {
-			return $item->dokument_kurzbz;
-		}, $resultPreDoc);
+		$mergedArray = [];
 
-		foreach($docNames as $doc)
+		foreach ($resultPreDoc as $pre)
 		{
-			$result = $this->AkteModel->getAktenFAS($person_id, $doc, $studiengang_kz, $prestudent_id, true);
+			$result = $this->AkteModel->getAktenFAS($person_id, $pre->dokument_kurzbz, $studiengang_kz, $prestudent_id, true);
 
 			if (isError($result))
-			{
 				return $this->terminateWithError($result, self::ERROR_TYPE_GENERAL);
-			}
+
 			if (hasData($result))
 			{
-				$data = getData($result);
-				foreach ($data as $value)
+				foreach (getData($result) as $doc)
 				{
-					array_push($arrayAccepted, $value);
+					$merged = clone $doc;
+					$merged->docdatum = $pre->docdatum;
+					$merged->insertvonma = $pre->insertvonma;
+					$merged->bezeichnung = $pre->bezeichnung;
+					$mergedArray[] = $merged;
 				}
 			}
-		}
-
-		//Mapping with document_kurzbz
-		$preDocMap = [];
-		foreach ($resultPreDoc as $pre) {
-			$preDocMap[$pre->dokument_kurzbz] = $pre;
-		}
-
-		$mergedArray = [];
-		foreach ($arrayAccepted as $doc) {
-			$merged = clone $doc;
-
-			if (isset($preDocMap[$doc->dokument_kurzbz])) {
-				$merged->docdatum = $preDocMap[$doc->dokument_kurzbz]->docdatum;
-				$merged->insertvonma = $preDocMap[$doc->dokument_kurzbz]->insertvonma;
-				$merged->bezeichnung = $preDocMap[$doc->dokument_kurzbz]->bezeichnung;
-			} else {
-				$merged->akzeptiertdatum = null;
-				$merged->akzeptiertvon = null;
+			else
+			{
+				$mergedArray[] = $pre;
 			}
-
-			$mergedArray[] = $merged;
 		}
 
 		$this->terminateWithSuccess($mergedArray);

application/controllers/api/frontend/v1/stv/Konto.php

@@ -48,7 +48,8 @@ class Konto extends FHCAPI_Controller
 
 		// Load language phrases
 		$this->loadPhrases([
-			'konto'
+			'konto',
+			'lehre'
 		]);
 	}
 
@@ -112,7 +113,7 @@ class Konto extends FHCAPI_Controller
 	 *
 	 * @return void
 	 */
-	public function getBuchungstypen()
+	public function getBuchungstypen($studiensemester_kurzbz = null)
 	{
 		$this->load->model('crm/Buchungstyp_model', 'BuchungstypModel');
 
@@ -122,6 +123,7 @@ class Konto extends FHCAPI_Controller
 
 		$data = $this->getDataOrTerminateWithError($result);
 
+		$this->_getOEHBeitrag($data, $studiensemester_kurzbz);
 		$this->terminateWithSuccess($data);
 	}
 
@@ -494,4 +496,43 @@ class Konto extends FHCAPI_Controller
 
 		$this->terminateWithSuccess();
 	}
+
+	private function _getOEHBeitrag(&$data, $studiensemester_kurzbz = null)
+	{
+		if (is_null($studiensemester_kurzbz))
+		{
+			$this->load->library('VariableLib', ['uid' => getAuthUID()]);
+			$studiensemester_akt = $this->variablelib->getVar('semester_aktuell');
+		}
+		else
+		{
+			$this->load->model('organisation/Studiensemester_model', 'StudiensemesterModel');
+			if ($this->StudiensemesterModel->isValidStudiensemester($studiensemester_kurzbz))
+				$studiensemester_akt = $studiensemester_kurzbz;
+			else
+				$this->terminateWithError($this->p->t('lehre', 'error_noStudiensemester'));
+		}
+
+		$this->load->model('codex/Oehbeitrag_model', 'OehbeitragModel');
+		$oehBeitrag = $this->OehbeitragModel->getByStudiensemester($studiensemester_akt);
+
+		$oehStandardbetrag = null;
+		if (hasData($oehBeitrag))
+		{
+			$oeh = getData($oehBeitrag)[0];
+			$summe = ($oeh->studierendenbeitrag + $oeh->versicherung) * -1;
+			$oehStandardbetrag = number_format((float)$summe, 2, '.', '');
+		}
+
+		if ($oehStandardbetrag !== null)
+		{
+			$data = array_map(function ($buchungstyp) use ($oehStandardbetrag) {
+				if (isset($buchungstyp->buchungstyp_kurzbz) && (strtolower($buchungstyp->buchungstyp_kurzbz) === 'oeh'))
+				{
+					$buchungstyp->standardbetrag = $oehStandardbetrag;
+				}
+				return $buchungstyp;
+			}, $data);
+		}
+	}
 }

application/controllers/api/frontend/v1/stv/Projektarbeit.php

@@ -90,6 +90,15 @@ class Projektarbeit extends FHCAPI_Controller
 
 		if (!isset($projektarbeit_id) || !is_numeric($projektarbeit_id)) return $this->terminateWithError('Projektarbeit Id missing', self::ERROR_TYPE_GENERAL);
 
+		$result = $this->fetchProjektarbeitByID($projektarbeit_id);
+
+		$data = $this->getDataOrTerminateWithError($result);
+
+		$this->terminateWithSuccess(current($data));
+	}
+	
+	private function fetchProjektarbeitById($projektarbeit_id) {
+		$this->ProjektarbeitModel->resetQuery();
 		$this->ProjektarbeitModel->addSelect(
 			'lehre.tbl_projektarbeit.projektarbeit_id, titel, titel_english, themenbereich, projekttyp_kurzbz, lehrveranstaltung_id, lehreinheit_id, 
 			firma_id, beginn, ende, gesperrtbis, note, final, freigegeben, tbl_projektarbeit.anmerkung, fa.name AS firma_name'
@@ -97,13 +106,10 @@ class Projektarbeit extends FHCAPI_Controller
 		$this->ProjektarbeitModel->addJoin('lehre.tbl_lehreinheit le', 'lehreinheit_id');
 		$this->ProjektarbeitModel->addJoin('lehre.tbl_lehrveranstaltung lv', 'lehrveranstaltung_id');
 		$this->ProjektarbeitModel->addJoin('public.tbl_firma fa', 'firma_id', 'LEFT');
-		$result = $this->ProjektarbeitModel->loadWhere(
+		return $this->ProjektarbeitModel->loadWhere(
 			array('projektarbeit_id' => $projektarbeit_id)
 		);
 
-		$data = $this->getDataOrTerminateWithError($result);
-
-		$this->terminateWithSuccess(current($data));
 	}
 
 	/**
@@ -132,7 +138,8 @@ class Projektarbeit extends FHCAPI_Controller
 		);
 
 		$data = $this->getDataOrTerminateWithError($result);
-
+		$data = $this->getDataOrTerminateWithError($this->fetchProjektarbeitById($data));
+		
 		$this->terminateWithSuccess($data);
 	}
 
@@ -280,10 +287,7 @@ class Projektarbeit extends FHCAPI_Controller
 	 */
 	public function getNoten()
 	{
-		$this->NoteModel->addOrder('notenwert', 'ASC');
-		$this->NoteModel->addOrder('bezeichnung', 'ASC');
-
-		$result = $this->NoteModel->load();
+		$result = $this->NoteModel->getAllActive();
 
 		if (isError($result)) return $this->terminateWithError(getError($result), self::ERROR_TYPE_GENERAL);
 

application/controllers/api/frontend/v1/stv/Students.php

@@ -25,9 +25,6 @@ if (! defined('BASEPATH')) exit('No direct script access allowed');
  */
 class Students extends FHCAPI_Controller
 {
-	private $allowedStgs = [];
-
-
 	public function __construct()
 	{
 		$permissions = [];
@@ -35,16 +32,17 @@ class Students extends FHCAPI_Controller
 		$permissions[$router->method] = ['admin:r', 'assistenz:r'];
 		parent::__construct($permissions);
 
-		$this->allowedStgs = $this->permissionlib->getSTG_isEntitledFor('admin') ?: [];
-		$this->allowedStgs = array_merge($this->allowedStgs, $this->permissionlib->getSTG_isEntitledFor('assistenz') ?: []);
+		$allowedStgs = $this->permissionlib->getSTG_isEntitledFor('admin') ?: [];
+		$allowedStgs = array_merge($allowedStgs, $this->permissionlib->getSTG_isEntitledFor('assistenz') ?: []);
 		
-		if (!$this->allowedStgs) {
+		if (!$allowedStgs) {
 			$this->_outputAuthError([$router->method => ['admin:r', 'assistenz:r']]);
 			exit;
 		}
 
 		// Load Libraries
 		$this->load->library('PhrasesLib');
+		$this->load->library('stv/StudentListLib', ['allowedStgs' => $allowedStgs]);
 		$this->loadPhrases(
 			array(
 				'lehre'
@@ -111,23 +109,19 @@ class Students extends FHCAPI_Controller
 		]);
 		
 
-		$this->load->model('crm/Prestudent_model', 'PrestudentModel');
-
-
-		$this->PrestudentModel->addJoin(
+		$this->studentlistlib->addJoin(
 			"(
 				SELECT prestudent_id 
 				FROM public.tbl_prestudentstatus
 				WHERE status_kurzbz = 'Incoming'
 				AND studiensemester_kurzbz = " . $this->PrestudentModel->escape($studiensemester_kurzbz) . "
 			) test",
-			"prestudent_id"
+			"prestudent_id",
+			"",
+			"start"
 		);
 
-
-		$this->prepareQuery($studiensemester_kurzbz);
-
-		$this->PrestudentModel->addSelect("COALESCE(
+		$this->studentlistlib->addSelect("COALESCE(
 			v.semester::text, 
 			CASE 
 				WHEN pls.status_kurzbz IN ('Aufgenommener', 'Bewerber', 'Wartender', 'interessent') 
@@ -135,16 +129,13 @@ class Students extends FHCAPI_Controller
 				ELSE ''::text 
 			END
 		) AS semester", false);
-		$this->PrestudentModel->addSelect("COALESCE(v.verband::text, ''::text)");
-		$this->PrestudentModel->addSelect("COALESCE(v.gruppe::text, ''::text)");
-		
-		$this->addSelectPrioRel();
+		$this->studentlistlib->addSelect("COALESCE(v.verband::text, ''::text) AS verband");
+		$this->studentlistlib->addSelect("COALESCE(v.gruppe::text, ''::text) AS gruppe");
+
 
 		$this->addFilter($studiensemester_kurzbz);
 
-
-		$result = $this->PrestudentModel->load();
-		
+		$result = $this->studentlistlib->execute($studiensemester_kurzbz);
 
 		$data = $this->getDataOrTerminateWithError($result);
 
@@ -164,10 +155,7 @@ class Students extends FHCAPI_Controller
 		]);
 		
 
-		$this->load->model('crm/Prestudent_model', 'PrestudentModel');
-
-
-		$this->PrestudentModel->addJoin(
+		$this->studentlistlib->addJoin(
 			"(
 				SELECT prestudent_id 
 				FROM bis.tbl_bisio bis 
@@ -187,14 +175,12 @@ class Students extends FHCAPI_Controller
 				) AND stdsem.studiensemester_kurzbz = " . $this->PrestudentModel->escape($studiensemester_kurzbz) . "
 				GROUP BY prestudent_id
 			) test",
-			"prestudent_id"
+			"prestudent_id",
+			"",
+			"start"
 		);
 
-
-		$this->prepareQuery($studiensemester_kurzbz);
-
-
-		$this->PrestudentModel->addSelect("COALESCE(
+		$this->studentlistlib->addSelect("COALESCE(
 			v.semester::text, 
 			CASE 
 				WHEN pls.status_kurzbz IN ('Aufgenommener', 'Bewerber', 'Wartender', 'interessent') 
@@ -202,16 +188,13 @@ class Students extends FHCAPI_Controller
 				ELSE ''::text 
 			END
 		) AS semester", false);
-		$this->PrestudentModel->addSelect("COALESCE(v.verband::text, ''::text)");
-		$this->PrestudentModel->addSelect("COALESCE(v.gruppe::text, ''::text)");
+		$this->studentlistlib->addSelect("COALESCE(v.verband::text, ''::text) AS verband");
+		$this->studentlistlib->addSelect("COALESCE(v.gruppe::text, ''::text) AS gruppe");
 		
-		$this->addSelectPrioRel();
 
 		$this->addFilter($studiensemester_kurzbz);
 
-
-		$result = $this->PrestudentModel->load();
-		
+		$result = $this->studentlistlib->execute($studiensemester_kurzbz);
 
 		$data = $this->getDataOrTerminateWithError($result);
 
@@ -231,23 +214,18 @@ class Students extends FHCAPI_Controller
 		]);
 		
 
-		$this->load->model('crm/Prestudent_model', 'PrestudentModel');
-
-
-		$this->PrestudentModel->addJoin(
+		$this->studentlistlib->addJoin(
 			"(
 				SELECT prestudent_id
 				FROM bis.tbl_mobilitaet 
 				WHERE studiensemester_kurzbz = " . $this->PrestudentModel->escape($studiensemester_kurzbz) . "
 			) bis",
-			"prestudent_id"
+			"prestudent_id",
+			"",
+			"start"
 		);
 
-
-		$this->prepareQuery($studiensemester_kurzbz);
-
-
-		$this->PrestudentModel->addSelect("COALESCE(
+		$this->studentlistlib->addSelect("COALESCE(
 			v.semester::text, 
 			CASE 
 				WHEN pls.status_kurzbz IN ('Aufgenommener', 'Bewerber', 'Wartender', 'interessent') 
@@ -255,16 +233,13 @@ class Students extends FHCAPI_Controller
 				ELSE ''::text 
 			END
 		) AS semester", false);
-		$this->PrestudentModel->addSelect("COALESCE(v.verband::text, ''::text)");
-		$this->PrestudentModel->addSelect("COALESCE(v.gruppe::text, ''::text)");
+		$this->studentlistlib->addSelect("COALESCE(v.verband::text, ''::text) AS verband");
+		$this->studentlistlib->addSelect("COALESCE(v.gruppe::text, ''::text) AS gruppe");
 		
-		$this->addSelectPrioRel();
 
 		$this->addFilter($studiensemester_kurzbz);
 
-
-		$result = $this->PrestudentModel->load();
-		
+		$result = $this->studentlistlib->execute($studiensemester_kurzbz);
 
 		$data = $this->getDataOrTerminateWithError($result);
 
@@ -313,8 +288,6 @@ class Students extends FHCAPI_Controller
 	 */
 	protected function fetchPrestudents($studiengang_kz, $studiensemester_kurzbz = null, $filter = null, $orgform_kurzbz = null)
 	{
-		$this->load->model('crm/Prestudent_model', 'PrestudentModel');
-
 		$stdsemEsc = $studiensemester_kurzbz ? $this->PrestudentModel->escape($studiensemester_kurzbz) : 'NULL';
 
 		$selectRT = "
@@ -331,38 +304,38 @@ class Students extends FHCAPI_Controller
 			AND r.studiensemester_kurzbz=" . $stdsemEsc;
 
 		
-		$where = ['tbl_prestudent.studiengang_kz' => $studiengang_kz];
+		$this->studentlistlib->addWhere('tbl_prestudent.studiengang_kz', $studiengang_kz);
 
 		if ($orgform_kurzbz) {
-			$where['ps.orgform_kurzbz'] = $orgform_kurzbz;
+			$this->studentlistlib->addWhere('ps.orgform_kurzbz', $orgform_kurzbz);
 		}
 
 		switch ($filter) {
 			case "interessenten":
-				$where['ps.status_kurzbz'] = 'Interessent';
+				$this->studentlistlib->addWhere('ps.status_kurzbz', 'Interessent');
 				break;
 			case "bewerbungnichtabgeschickt":
-				$where['ps.status_kurzbz'] = 'Interessent';
-				$where['ps.bewerbung_abgeschicktamum'] = null;
+				$this->studentlistlib->addWhere('ps.status_kurzbz', 'Interessent');
+				$this->studentlistlib->addWhere('ps.bewerbung_abgeschicktamum IS NULL');
 				break;
 			case "bewerbungabgeschickt":
-				$where['ps.status_kurzbz'] = 'Interessent';
-				$where['ps.bewerbung_abgeschicktamum IS NOT NULL'] = null;
-				$where['ps.bestaetigtam'] = null;
+				$this->studentlistlib->addWhere('ps.status_kurzbz', 'Interessent');
+				$this->studentlistlib->addWhere('ps.bewerbung_abgeschicktamum IS NOT NULL');
+				$this->studentlistlib->addWhere('ps.bestaetigtam IS NULL');
 				break;
 			case "statusbestaetigt":
-				$where['ps.status_kurzbz'] = 'Interessent';
-				$where['ps.bestaetigtam IS NOT NULL'] = null;
+				$this->studentlistlib->addWhere('ps.status_kurzbz', 'Interessent');
+				$this->studentlistlib->addWhere('ps.bestaetigtam IS NOT NULL');
 				break;
 			case "statusbestaetigtrtnichtangemeldet":
-				$where['ps.status_kurzbz'] = 'Interessent';
-				$where['ps.bestaetigtam IS NOT NULL'] = null;
-				$this->PrestudentModel->db->where('NOT EXISTS(' . $selectRT . ')', null, false);
+				$this->studentlistlib->addWhere('ps.status_kurzbz', 'Interessent');
+				$this->studentlistlib->addWhere('ps.bestaetigtam IS NOT NULL');
+				$this->studentlistlib->addWhere('NOT EXISTS(' . $selectRT . ')', null, false);
 				break;
 			case "statusbestaetigtrtangemeldet":
-				$where['ps.status_kurzbz'] = 'Interessent';
-				$where['ps.bestaetigtam IS NOT NULL'] = null;
-				$this->PrestudentModel->db->where('EXISTS(' . $selectRT . ')', null, false);
+				$this->studentlistlib->addWhere('ps.status_kurzbz', 'Interessent');
+				$this->studentlistlib->addWhere('ps.bestaetigtam IS NOT NULL');
+				$this->studentlistlib->addWhere('EXISTS(' . $selectRT . ')', null, false);
 				break;
 			case "zgv":
 				$this->load->model('organisation/Studiengang_model', 'StudiengangModel');
@@ -374,69 +347,69 @@ class Students extends FHCAPI_Controller
 					$this->terminateWithSuccess([]);
 				$stg = current($stg);
 
-				$where['ps.status_kurzbz'] = 'Interessent';
+				$this->studentlistlib->addWhere('ps.status_kurzbz', 'Interessent');
 				
 				if ($stg->typ == 'm') {
-					$where['zgvmas_code IS NOT NULL'] = null;
+					$this->studentlistlib->addWhere('zgvmas_code IS NOT NULL');
 					if (defined('ZGV_ERFUELLT_ANZEIGEN') && ZGV_ERFUELLT_ANZEIGEN)
-						$where['zgvmas_erfuellt'] = true;
+						$this->studentlistlib->addWhere('zgvmas_erfuellt', true);
 				} elseif ($stg->typ == 'p') {
-					$where['zgvdoktor_code IS NOT NULL'] = null;
+					$this->studentlistlib->addWhere('zgvdoktor_code IS NOT NULL');
 					if (defined('ZGV_DOKTOR_ANZEIGEN') && ZGV_DOKTOR_ANZEIGEN)
-						$where['zgvdoktor_erfuellt'] = true;
+						$this->studentlistlib->addWhere('zgvdoktor_erfuellt', true);
 				} else {
-					$where['zgv_code IS NOT NULL'] = null;
+					$this->studentlistlib->addWhere('zgv_code IS NOT NULL');
 					if (defined('ZGV_ERFUELLT_ANZEIGEN') && ZGV_ERFUELLT_ANZEIGEN)
-						$where['zgv_erfuellt'] = true;
+						$this->studentlistlib->addWhere('zgv_erfuellt', true);
 				}
 				break;
 			case "reihungstestangemeldet":
-				$where['ps.status_kurzbz'] = 'Interessent';
-				$this->PrestudentModel->db->where('EXISTS(' . $selectRT . ')', null, false);
+				$this->studentlistlib->addWhere('ps.status_kurzbz', 'Interessent');
+				$this->studentlistlib->addWhere('EXISTS(' . $selectRT . ')', null, false);
 				break;
 			case "reihungstestnichtangemeldet":
-				$where['ps.status_kurzbz'] = 'Interessent';
-				$this->PrestudentModel->db->where('NOT EXISTS(' . $selectRT . ')', null, false);
+				$this->studentlistlib->addWhere('ps.status_kurzbz', 'Interessent');
+				$this->studentlistlib->addWhere('NOT EXISTS(' . $selectRT . ')', null, false);
 				break;
 			case "bewerber":
-				$where['ps.status_kurzbz'] = 'Bewerber';
+				$this->studentlistlib->addWhere('ps.status_kurzbz', 'Bewerber');
 				break;
 			case "bewerberrtnichtangemeldet":
-				$where['ps.status_kurzbz'] = 'Bewerber';
-				$this->PrestudentModel->db->where('NOT EXISTS(' . $selectRT . ')', null, false);
+				$this->studentlistlib->addWhere('ps.status_kurzbz', 'Bewerber');
+				$this->studentlistlib->addWhere('NOT EXISTS(' . $selectRT . ')', null, false);
 				break;
 			case "bewerberrtangemeldet":
-				$where['ps.status_kurzbz'] = 'Bewerber';
-				$this->PrestudentModel->db->where('EXISTS(' . $selectRT . ')', null, false);
+				$this->studentlistlib->addWhere('ps.status_kurzbz', 'Bewerber');
+				$this->studentlistlib->addWhere('EXISTS(' . $selectRT . ')', null, false);
 				break;
 			case "bewerberrtangemeldetteilgenommen":
-				$where['ps.status_kurzbz'] = 'Bewerber';
-				$this->PrestudentModel->db->where('EXISTS(' . $selectRT . ')', null, false);
-				$where['reihungstestangetreten'] = true;
+				$this->studentlistlib->addWhere('ps.status_kurzbz', 'Bewerber');
+				$this->studentlistlib->addWhere('EXISTS(' . $selectRT . ')', null, false);
+				$this->studentlistlib->addWhere('reihungstestangetreten', true);
 				break;
 			case "bewerberrtangemeldetnichtteilgenommen":
-				$where['ps.status_kurzbz'] = 'Bewerber';
-				$this->PrestudentModel->db->where('EXISTS(' . $selectRT . ')', null, false);
-				$where['reihungstestangetreten'] = false;
+				$this->studentlistlib->addWhere('ps.status_kurzbz', 'Bewerber');
+				$this->studentlistlib->addWhere('EXISTS(' . $selectRT . ')', null, false);
+				$this->studentlistlib->addWhere('reihungstestangetreten', false);
 				break;
 			case "aufgenommen":
-				$where['ps.status_kurzbz'] = 'Aufgenommener';
+				$this->studentlistlib->addWhere('ps.status_kurzbz', 'Aufgenommener');
 				break;
 			case "warteliste":
-				$where['ps.status_kurzbz'] = 'Wartender';
+				$this->studentlistlib->addWhere('ps.status_kurzbz', 'Wartender');
 				break;
 			case "absage":
-				$where['ps.status_kurzbz'] = 'Abgewiesener';
+				$this->studentlistlib->addWhere('ps.status_kurzbz', 'Abgewiesener');
 				break;
 			case "incoming":
 				// NOTE(chris): in FAS it was not filtered for studiengang_kz
-				$where['ps.status_kurzbz'] = 'Incoming';
+				$this->studentlistlib->addWhere('ps.status_kurzbz', 'Incoming');
 				break;
 			case "absolvent":
-				$where['ps.status_kurzbz'] = 'Absolvent';
+				$this->studentlistlib->addWhere('ps.status_kurzbz', 'Absolvent');
 				break;
 			case "diplomand":
-				$where['ps.status_kurzbz'] = 'Diplomand';
+				$this->studentlistlib->addWhere('ps.status_kurzbz', 'Diplomand');
 				break;
 			default:
 				if (!$studiensemester_kurzbz) {
@@ -444,9 +417,9 @@ class Students extends FHCAPI_Controller
 					 * show all prestudents in this stg who don't have a status
 					 * $orgform_kurzbz does not change the results since orgform is stored in the status table
 					 */
-					$where['ps.status_kurzbz'] = null;
+					$this->studentlistlib->addWhere('ps.status_kurzbz IS NULL');
 				} else {
-					$this->PrestudentModel->db->where_in('ps.status_kurzbz', [
+					$this->studentlistlib->addWhere('ps.status_kurzbz', [
 						'Interessent',
 						'Bewerber',
 						'Aufgenommener',
@@ -457,21 +430,19 @@ class Students extends FHCAPI_Controller
 				break;
 		}
 
-		$this->prepareQuery($studiensemester_kurzbz);
-		
-		$this->PrestudentModel->addSelect("
+		$this->studentlistlib->addSelect("
 			CASE 
 				WHEN pls.status_kurzbz IN ('Aufgenommener', 'Bewerber', 'Wartender', 'interessent') 
 				THEN ps.ausbildungssemester::text 
 				ELSE ''::text 
 			END AS semester", false);
-		$this->PrestudentModel->addSelect("'' AS verband");
-		$this->PrestudentModel->addSelect("'' AS gruppe");
-		$this->addSelectPrioRel();
+		$this->studentlistlib->addSelect("'' AS verband");
+		$this->studentlistlib->addSelect("'' AS gruppe");
+
 
 		$this->addFilter($studiensemester_kurzbz);
 
-		$result = $this->PrestudentModel->loadWhere($where);
+		$result = $this->studentlistlib->execute($studiensemester_kurzbz);
 
 		$data = $this->getDataOrTerminateWithError($result);
 
@@ -574,7 +545,6 @@ class Students extends FHCAPI_Controller
 		$gruppe_kurzbz = null,
 		$orgform_kurzbz = null
 	) {
-		$this->load->model('crm/Prestudent_model', 'PrestudentModel');
 		$this->load->model('organisation/Studiensemester_model', 'StudiensemesterModel');
 
 		if (!$this->StudiensemesterModel->isValidStudiensemester($studiensemester_kurzbz))
@@ -582,34 +552,29 @@ class Students extends FHCAPI_Controller
 			$this->terminateWithError($studiensemester_kurzbz . ' - ' . $this->p->t('lehre', 'error_noStudiensemester'));
 		}
 
-		$this->prepareQuery($studiensemester_kurzbz, '');
+		// NOTE(chris): overwrite 'LEFT JOIN' with 'JOIN'
+		$this->studentlistlib->addJoin("public.tbl_student s", "prestudent_id");
 
-		$this->PrestudentModel->addSelect('v.semester');
-		$this->PrestudentModel->addSelect('v.verband');
-		$this->PrestudentModel->addSelect('v.gruppe');
-		$this->PrestudentModel->addSelect("'' AS priorisierung_relativ");
-
-
-		$where = [];
+		$this->studentlistlib->addSelect("'' AS priorisierung_relativ");
 
 		if ($gruppe_kurzbz !== null) {
-			$this->PrestudentModel->addJoin('public.tbl_benutzergruppe g', 'uid');
-			$where['g.gruppe_kurzbz'] = $gruppe_kurzbz;
-			$where['g.studiensemester_kurzbz'] = $studiensemester_kurzbz;
+			$this->studentlistlib->addJoin('public.tbl_benutzergruppe g', 'uid', '', 'after_b');
+			$this->studentlistlib->addWhere('g.gruppe_kurzbz', $gruppe_kurzbz);
+			$this->studentlistlib->addWhere('g.studiensemester_kurzbz', $studiensemester_kurzbz);
 		} else {
-			$where['v.studiengang_kz'] = $studiengang_kz;
+			$this->studentlistlib->addWhere('v.studiengang_kz', $studiengang_kz);
 
 			if ($semester !== null)
-				$where['v.semester'] = $semester;
+				$this->studentlistlib->addWhere('v.semester', $semester);
 
 			if ($verband !== null)
-				$where['v.verband'] = $verband;
+				$this->studentlistlib->addWhere('v.verband', $verband);
 
 			if ($gruppe !== null)
-				$where['v.gruppe'] = $gruppe;
+				$this->studentlistlib->addWhere('v.gruppe', $gruppe);
 	
 			if (!$verband && !$gruppe && $orgform_kurzbz !== null) {
-				$this->PrestudentModel->db->where(
+				$this->studentlistlib->addWhere(
 					"(
 						SELECT orgform_kurzbz
 						FROM public.tbl_prestudentstatus 
@@ -623,10 +588,11 @@ class Students extends FHCAPI_Controller
 			}
 		}
 
+
 		$this->addFilter($studiensemester_kurzbz);
 
-		$result = $this->PrestudentModel->loadWhere($where);
-		
+		$result = $this->studentlistlib->execute($studiensemester_kurzbz);
+
 		$data = $this->getDataOrTerminateWithError($result);
 
 		$this->terminateWithSuccess($data);
@@ -652,11 +618,8 @@ class Students extends FHCAPI_Controller
 			$this->terminateWithError($studiensemester_kurzbz . ' - ' . $this->p->t('lehre', 'error_noStudiensemester'));
 		}
 
-		$this->load->model('crm/Prestudent_model', 'PrestudentModel');
-
-		$this->prepareQuery($studiensemester_kurzbz);
-
-		$this->PrestudentModel->addSelect("COALESCE(
+		
+		$this->studentlistlib->addSelect("COALESCE(
 			v.semester::text, 
 			CASE 
 				WHEN pls.status_kurzbz IN ('Aufgenommener', 'Bewerber', 'Wartender', 'interessent') 
@@ -664,16 +627,15 @@ class Students extends FHCAPI_Controller
 				ELSE ''::text 
 			END
 		) AS semester", false);
-		$this->PrestudentModel->addSelect("COALESCE(v.verband::text, ''::text)");
-		$this->PrestudentModel->addSelect("COALESCE(v.gruppe::text, ''::text)");
+		$this->studentlistlib->addSelect("COALESCE(v.verband::text, ''::text) AS verband");
+		$this->studentlistlib->addSelect("COALESCE(v.gruppe::text, ''::text) AS gruppe");
+
+		$this->studentlistlib->addWhere('tbl_prestudent.prestudent_id', $prestudent_id);
 
-		$this->addSelectPrioRel();
 
 		$this->addFilter($studiensemester_kurzbz);
 
-		$result = $this->PrestudentModel->loadWhere([
-			'tbl_prestudent.prestudent_id' => $prestudent_id
-		]);
+		$result = $this->studentlistlib->execute($studiensemester_kurzbz);
 
 		$data = $this->getDataOrTerminateWithError($result);
 
@@ -700,23 +662,13 @@ class Students extends FHCAPI_Controller
 			$this->terminateWithError($studiensemester_kurzbz . ' - ' . $this->p->t('lehre', 'error_noStudiensemester'));
 		}
 
-		$this->load->model('crm/Prestudent_model', 'PrestudentModel');
-
-		$this->prepareQuery($studiensemester_kurzbz);
-
-		$this->PrestudentModel->addSelect('v.semester');
-		$this->PrestudentModel->addSelect('v.verband');
-		$this->PrestudentModel->addSelect('v.gruppe');
-
-		$this->addSelectPrioRel();
-
 
+		$this->studentlistlib->addWhere('s.student_uid', $student_uid);
+		
 
 		$this->addFilter($studiensemester_kurzbz);
 
-		$result = $this->PrestudentModel->loadWhere([
-			's.student_uid' => $student_uid
-		]);
+		$result = $this->studentlistlib->execute($studiensemester_kurzbz);
 		
 		$data = $this->getDataOrTerminateWithError($result);
 
@@ -744,21 +696,13 @@ class Students extends FHCAPI_Controller
 			$this->terminateWithError($studiensemester_kurzbz . ' - ' . $this->p->t('lehre', 'error_noStudiensemester'));
 		}
 
-		$this->load->model('crm/Prestudent_model', 'PrestudentModel');
 
-		$this->prepareQuery($studiensemester_kurzbz);
-
-		$this->PrestudentModel->addSelect('v.semester');
-		$this->PrestudentModel->addSelect('v.verband');
-		$this->PrestudentModel->addSelect('v.gruppe');
-
-		$this->addSelectPrioRel();
+		$this->studentlistlib->addWhere('p.person_id', $person_id);
 
+		
 		$this->addFilter($studiensemester_kurzbz);
 
-		$result = $this->PrestudentModel->loadWhere([
-			'p.person_id' => $person_id
-		]);
+		$result = $this->studentlistlib->execute($studiensemester_kurzbz);
 		
 		$data = $this->getDataOrTerminateWithError($result);
 
@@ -790,29 +734,8 @@ class Students extends FHCAPI_Controller
 
 		$data = $this->getDataOrTerminateWithError($result);
 
-
-		$this->load->model('crm/Prestudent_model', 'PrestudentModel');
-
-		$this->prepareQuery($studiensemester_kurzbz);
-
-		$this->PrestudentModel->addSelect("COALESCE(v.semester::text, CASE WHEN public.get_rolle_prestudent(tbl_prestudent.prestudent_id, NULL) IN ('Aufgenommener', 'Bewerber', 'Wartender', 'interessent') THEN public.get_absem_prestudent(tbl_prestudent.prestudent_id, NULL)::text ELSE ''::text END) AS semester", false);
-		$this->PrestudentModel->addSelect('v.verband');
-		$this->PrestudentModel->addSelect('v.gruppe');
-
-		//add status per semester
-		$this->PrestudentModel->addSelect(
-			"public.get_rolle_prestudent(public.tbl_prestudent.prestudent_id, "
-				. $this->PrestudentModel->escape($studiensemester_kurzbz)
-				. ")  AS statusofsemester"
-		);
-
-		$this->addSelectPrioRel();
-
-		$this->addFilter($studiensemester_kurzbz);
-
 		$prestudent_ids = [];
 		$student_uids = [];
-			$this->addMeta('data', $data);
 		foreach ($data as $row) {
 			$dataset = json_decode($row->data);
 			if ($row->type == 'prestudent') {
@@ -822,187 +745,38 @@ class Students extends FHCAPI_Controller
 			}
 		}
 
+
+		$this->studentlistlib->addSelect("COALESCE(
+			v.semester::text, 
+			CASE 
+				WHEN public.get_rolle_prestudent(tbl_prestudent.prestudent_id, NULL) IN ('Aufgenommener', 'Bewerber', 'Wartender', 'interessent') 
+				THEN public.get_absem_prestudent(tbl_prestudent.prestudent_id, NULL)::text 
+				ELSE ''::text 
+			END
+		) AS semester", false);
+
+
 		if ($prestudent_ids && $student_uids) {
-			$this->PrestudentModel->db->where_in('tbl_prestudent.prestudent_id', $prestudent_ids);
-			$this->PrestudentModel->db->or_where_in('s.student_uid', $student_uids);
+			$this->studentlistlib->addWhere('tbl_prestudent.prestudent_id', $prestudent_ids);
+			$this->studentlistlib->addOrWhere('s.student_uid', $student_uids);
 		} elseif ($prestudent_ids) {
-			$this->PrestudentModel->db->where_in('tbl_prestudent.prestudent_id', $prestudent_ids);
+			$this->studentlistlib->addWhere('tbl_prestudent.prestudent_id', $prestudent_ids);
 		} elseif ($student_uids) {
-			$this->PrestudentModel->db->where_in('s.student_uid', $student_uids);
+			$this->studentlistlib->addWhere('s.student_uid', $student_uids);
 		} else {
 			$this->terminateWithSuccess([]);
 		}
 
-		$result = $this->PrestudentModel->load();
+
+		$this->addFilter($studiensemester_kurzbz);
+
+		$result = $this->studentlistlib->execute($studiensemester_kurzbz);
 
 		$data = $this->getDataOrTerminateWithError($result);
 
 		$this->terminateWithSuccess($data);
 	}
 
-	/**
-	 * @param string|null	$studiensemester_kurzbz
-	 * @param string		$type
-	 *
-	 * @return void
-	 */
-	protected function prepareQuery($studiensemester_kurzbz, $type = 'LEFT')
-	{
-		$stdsemEsc = $studiensemester_kurzbz ? $this->PrestudentModel->escape($studiensemester_kurzbz) : 'NULL';
-
-		$this->load->config('stv');
-		$tags = $this->config->item('stv_prestudent_tags');
-
-		$whereTags = '';
-		if (is_array($tags) && !isEmptyArray($tags)) {
-			$tags = array_keys($tags);
-
-			foreach ($tags as $key => $tag) {
-				$tags[$key] = $this->db->escape($tag);
-			}
-			$whereTags = " AND nt.typ_kurzbz IN (" . implode(",", $tags) . ")";
-		}
-		$subQueryTag = "
-		  (
-			SELECT
-			  tag.prestudent_id,
-			  COALESCE(json_agg(tag ORDER BY tag.done), '[]'::json) AS tags
-			FROM (
-			  SELECT DISTINCT ON (n.notiz_id)
-				n.notiz_id AS id,
-				nt.typ_kurzbz,
-				array_to_json(nt.bezeichnung_mehrsprachig)->>0 AS beschreibung,
-				n.text AS notiz,
-				nt.style,
-				n.erledigt AS done,
-				nz.prestudent_id
-			  FROM public.tbl_notizzuordnung AS nz
-				JOIN public.tbl_notiz AS n ON nz.notiz_id = n.notiz_id
-				JOIN public.tbl_notiz_typ AS nt ON n.typ = nt.typ_kurzbz "
-			. $whereTags .
-			"
-			) AS tag
-			GROUP BY tag.prestudent_id
-		  ) AS tag_data_agg
-		";
-
-		$this->PrestudentModel->addJoin('public.tbl_studiengang stg', 'studiengang_kz', 'LEFT');
-		$this->PrestudentModel->addJoin('public.tbl_person p', 'person_id');
-		$this->PrestudentModel->addJoin('public.tbl_student s', 'prestudent_id', $type);
-		$this->PrestudentModel->addJoin('public.tbl_prestudentstatus pls', '
-			pls.status_kurzbz=public.get_rolle_prestudent(tbl_prestudent.prestudent_id, NULL) 
-			AND pls.prestudent_id=tbl_prestudent.prestudent_id 
-			AND pls.studiensemester_kurzbz=public.get_stdsem_prestudent(tbl_prestudent.prestudent_id, NULL) 
-			AND pls.ausbildungssemester=public.get_absem_prestudent(tbl_prestudent.prestudent_id, NULL)', 'LEFT');
-		$this->PrestudentModel->addJoin('lehre.tbl_studienplan sp', 'studienplan_id', 'LEFT');
-		$this->PrestudentModel->addJoin('public.tbl_benutzer b', 's.student_uid=b.uid', 'LEFT');
-		$this->PrestudentModel->addJoin(
-			'public.tbl_studentlehrverband v',
-			'v.student_uid=s.student_uid AND v.studiensemester_kurzbz' . ($studiensemester_kurzbz ? '=' . $stdsemEsc : ' IS NULL'),
-			$type
-		);
-		$this->PrestudentModel->addJoin('public.tbl_prestudentstatus ps', '
-			ps.status_kurzbz=public.get_rolle_prestudent(tbl_prestudent.prestudent_id, ' . $stdsemEsc . ') 
-			AND ps.prestudent_id=tbl_prestudent.prestudent_id 
-			AND ps.studiensemester_kurzbz=public.get_stdsem_prestudent(tbl_prestudent.prestudent_id, ' . $stdsemEsc . ') 
-			AND ps.ausbildungssemester=public.get_absem_prestudent(tbl_prestudent.prestudent_id, ' . $stdsemEsc . ')', 'LEFT');
-
-		$this->PrestudentModel->addJoin($subQueryTag, 'tag_data_agg.prestudent_id = tbl_prestudent.prestudent_id', 'LEFT');
-
-
-		$this->PrestudentModel->addSelect("b.uid");
-		$this->PrestudentModel->addSelect('tag_data_agg.tags');
-		$this->PrestudentModel->addSelect('titelpre');
-		$this->PrestudentModel->addSelect('nachname');
-		$this->PrestudentModel->addSelect('vorname');
-		$this->PrestudentModel->addSelect('wahlname');
-		$this->PrestudentModel->addSelect('vornamen');
-		$this->PrestudentModel->addSelect('titelpost');
-		$this->PrestudentModel->addSelect('ersatzkennzeichen');
-		$this->PrestudentModel->addSelect('gebdatum');
-		$this->PrestudentModel->addSelect('geschlecht');
-		$this->PrestudentModel->addSelect('foto');
-		$this->PrestudentModel->addSelect('foto_sperre');
-
-		// semester
-		// verband
-		// gruppe
-
-		//add status per semester
-		$this->PrestudentModel->addSelect(
-			"public.get_rolle_prestudent(public.tbl_prestudent.prestudent_id, "
-				. $this->PrestudentModel->escape($studiensemester_kurzbz)
-				. ")  AS statusofsemester"
-		);
-
-		$this->PrestudentModel->addSelect('UPPER(stg.typ || stg.kurzbz) AS studiengang');
-		$this->PrestudentModel->addSelect('tbl_prestudent.studiengang_kz');
-		$this->PrestudentModel->addSelect('stg.bezeichnung AS stg_bezeichnung');
-		$this->PrestudentModel->addSelect("s.matrikelnr");
-		$this->PrestudentModel->addSelect('p.person_id');
-		$this->PrestudentModel->addSelect('pls.status_kurzbz AS status');
-		$this->PrestudentModel->addSelect('pls.datum AS status_datum');
-		$this->PrestudentModel->addSelect('pls.bestaetigtam AS status_bestaetigung');
-		$this->PrestudentModel->addSelect(
-			"(SELECT kontakt FROM public.tbl_kontakt WHERE kontakttyp='email' AND person_id=p.person_id AND zustellung LIMIT 1) AS mail_privat",
-			false
-		);
-		$this->PrestudentModel->addSelect("
-			CASE WHEN b.uid IS NOT NULL AND b.uid<>'' 
-			THEN CONCAT(b.uid, '@', " . $this->PrestudentModel->escape(DOMAIN) . ")
-			ELSE '' END AS mail_intern", false);
-		$this->PrestudentModel->addSelect('p.anmerkung AS anmerkungen');
-		$this->PrestudentModel->addSelect('tbl_prestudent.anmerkung');
-		$this->PrestudentModel->addSelect('pls.orgform_kurzbz');
-		$this->PrestudentModel->addSelect('aufmerksamdurch_kurzbz');
-		$this->PrestudentModel->addSelect(
-			"(SELECT rt_gesamtpunkte AS punkte FROM public.tbl_prestudent WHERE prestudent_id=ps.prestudent_id) AS punkte",
-			false
-		);
-		$this->PrestudentModel->addSelect('tbl_prestudent.aufnahmegruppe_kurzbz');
-		$this->PrestudentModel->addSelect('tbl_prestudent.dual');
-		$this->PrestudentModel->addSelect('p.matr_nr');
-		$this->PrestudentModel->addSelect('sp.bezeichnung AS studienplan_bezeichnung');
-		$this->PrestudentModel->addSelect('tbl_prestudent.prestudent_id');
-
-		// priorisierung_relativ
-
-		$this->PrestudentModel->addSelect('mentor');
-		$this->PrestudentModel->addSelect('b.aktiv AS bnaktiv');
-		$this->PrestudentModel->addSelect('unruly');
-
-		$this->PrestudentModel->db->where_in('tbl_prestudent.studiengang_kz', $this->allowedStgs);
-
-		$this->PrestudentModel->addOrder('nachname');
-		$this->PrestudentModel->addOrder('vorname');
-	}
-
-	/**
-	 * @return void
-	 */
-	protected function addSelectPrioRel()
-	{
-		$this->PrestudentModel->addSelect("(
-			SELECT count(*)
-			FROM (
-				SELECT *, public.get_rolle_prestudent(pss.prestudent_id, NULL) AS laststatus
-				FROM public.tbl_prestudent pss
-				JOIN public.tbl_prestudentstatus USING (prestudent_id)
-				WHERE person_id = p.person_id
-				AND studiensemester_kurzbz = (
-					SELECT studiensemester_kurzbz
-					FROM public.tbl_prestudentstatus
-					WHERE prestudent_id = tbl_prestudent.prestudent_id
-					AND status_kurzbz = 'Interessent'
-					LIMIT 1
-				)
-				AND status_kurzbz = 'Interessent'
-			) prest
-			WHERE laststatus NOT IN ('Abbrecher', 'Abgewiesener', 'Absolvent')
-			AND priorisierung <= tbl_prestudent.priorisierung
-		) || ' (' || COALESCE(tbl_prestudent.priorisierung::text, ' '::text) || ')' AS priorisierung_relativ", false);
-	}
-
 	/**
 	 * Adds additional filters to the query
 	 *

application/controllers/api/frontend/v1/tempus/Config.php

@@ -0,0 +1,133 @@
+<?php
+
+if (!defined('BASEPATH'))
+	exit('No direct script access allowed');
+
+
+class Config extends FHCAPI_Controller
+{
+	private $_ci;
+
+	public function __construct()
+	{
+		parent::__construct([
+			'get' => ['admin:r', 'assistenz:r'],
+			'getHeader' => ['admin:r', 'assistenz:r'],
+			'set' => ['admin:r', 'assistenz:r'],
+			'updateCollision' => ['admin:r', 'assistenz:r'],
+		]);
+
+		// Load Phrases
+		$this->loadPhrases([
+			'ui',
+		]);
+
+		$this->_ci = &get_instance();
+		$this->_ci->load->model('ressource/Kalenderstatus_model', 'KalenderStatusModel');
+		$this->_ci->load->model('system/Variable_model', 'VariableModel');
+		$this->_ci->load->library('VariableLib', array('uid' => getAuthUID()));
+	}
+
+	public function get()
+	{
+		$config = [];
+
+		$result = $this->_ci->VariableModel->getVariables(getAuthUID(), ['ignore_kollision', 'kollision_student', 'ignore_reservierung', 'ignore_zeitsperre', 'ignore_resources_collisions']);
+
+		$data = $this->getDataOrTerminateWithError($result);
+		$config['ignore_kollision'] = [
+			"type"  => "checkbox",
+			"label" => $this->p->t('ui', 'ignore_kollision'),
+			"value" => ($data['ignore_kollision'] ?? 'false') === 'true'
+
+		];
+
+		$config['kollision_student'] = [
+			"type"  => "checkbox",
+			"label" => $this->p->t('ui', 'kollision_student'),
+			"value" => ($data['kollision_student'] ?? 'false') === 'true'
+		];
+
+		$config['ignore_reservierung'] = [
+			"type"  => "checkbox",
+			"label" => $this->p->t('ui', 'ignore_reservierung'),
+			"value" => ($data['ignore_reservierung'] ?? 'false') === 'true'
+
+		];
+
+		$config['ignore_zeitsperre'] = [
+			"type"  => "checkbox",
+			"label" => $this->p->t('ui', 'ignore_zeitsperre'),
+			"value" => ($data['ignore_zeitsperre'] ?? 'false') === 'true'
+		];
+
+		$config['ignore_resources_collisions'] = [
+			"type"  => "checkbox",
+			"label" => $this->p->t('ui', 'ignore_resources_collisions'),
+			"value" => ($data['ignore_resources_collisions'] ?? 'false') === 'true'
+		];
+
+		$this->terminateWithSuccess($config);
+	}
+	public function getHeader()
+	{
+		$language = getUserLanguage() == 'German' ? 0 : 1;
+
+		$this->_ci->KalenderStatusModel->addSelect('*, array_to_json(bezeichnung_mehrsprachig::varchar[])->>' . $language .' AS status');
+		$this->_ci->KalenderStatusModel->addOrder('sort');
+		$this->_ci->KalenderStatusModel->db->where_not_in('status_kurzbz', array('archived', 'deleted'));
+		$visible_status = $this->_ci->KalenderStatusModel->load();
+
+		$visible_status = getData($visible_status);
+
+		$config['visible_status']['all'] = 'Alle';
+
+		foreach ($visible_status as $status)
+		{
+			$config['visible_status'][$status->status_kurzbz] = $status->status;
+		}
+
+		$this->terminateWithSuccess($config);
+	}
+
+	public function set()
+	{
+		$this->_ci->VariableModel->setVariable(
+			getAuthUID(),
+			'ignore_kollision',
+			$this->input->post('ignore_kollision') === true ? 'true' : 'false'
+		);
+		$this->_ci->VariableModel->setVariable(
+			getAuthUID(),
+			'kollision_student',
+			$this->input->post('kollision_student') === true ? 'true' : 'false'
+		);
+		$this->_ci->VariableModel->setVariable(
+			getAuthUID(),
+			'ignore_reservierung',
+			$this->input->post('ignore_reservierung') === true ? 'true' : 'false'
+		);
+		$this->_ci->VariableModel->setVariable(
+			getAuthUID(),
+			'ignore_zeitsperre',
+			$this->input->post('ignore_zeitsperre') === true ? 'true' : 'false'
+		);
+		$this->_ci->VariableModel->setVariable(
+			getAuthUID(),
+			'ignore_resources_collisions',
+			$this->input->post('ignore_resources_collisions') === true ? 'true' : 'false'
+		);
+		$this->terminateWithSuccess();
+	}
+
+	public function updateCollision()
+	{
+		$original_ignore = $this->_ci->variablelib->getVar('ignore_kollision');
+		$this->_ci->VariableModel->setVariable(
+			getAuthUID(),
+			'ignore_kollision',
+			$original_ignore === 'true' ? 'false' : 'true'
+		);
+	}
+
+}

application/controllers/api/frontend/v1/tempus/Coursepicker.php

@@ -0,0 +1,300 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+class Coursepicker extends FHCAPI_Controller
+{
+	private $_ci;
+	public function __construct()
+	{
+		parent::__construct([
+			'search' => self::PERM_LOGGED,
+			'getByStg' => self::PERM_LOGGED
+		]);
+
+		$this->_ci = &get_instance();
+		$this->load->library('form_validation');
+
+		$this->_ci->load->model('education/lehreinheit_model', 'LehreinheitModel');
+		$this->_ci->load->model('education/Lehreinheitmitarbeiter_model', 'LehreinheitmitarbeiterModel');
+
+
+		$this->loadPhrases(['ui']);
+	}
+
+	public function search()
+	{
+		$query = $this->input->get('query');
+		if (is_null($query))
+			$this->terminateWithError($this->p->t('ui', 'ungueltigeParameter'), self::ERROR_TYPE_GENERAL);
+
+		$query_words = explode(' ', $query);
+
+		//TODO Where weiter anpassen z.B. Fachbereich
+		$this->_ci->LehreinheitModel->addSelect('tbl_lehreinheit.lehreinheit_id,
+												tbl_lehreinheit.lvnr,
+												tbl_lehreinheit.lehrfach_id,
+												lehrfach.kurzbz AS lehrfach,
+												lehrfach.bezeichnung AS lehrfach_bez,
+												lehrfach.farbe AS lehrfach_farbe,
+												tbl_lehreinheit.lehrform_kurzbz AS lehrform,
+												lema.mitarbeiter_uid AS lektor_uid,
+												tbl_mitarbeiter.kurzbz AS lektor,
+												tbl_studiengang.studiengang_kz,
+												upper(tbl_studiengang.typ::character varying::text || tbl_studiengang.kurzbz::text) AS studiengang,
+												lvb.semester,
+												lvb.verband,
+												lvb.gruppe,
+												lvb.gruppe_kurzbz,
+												tbl_lehreinheit.raumtyp,
+												tbl_lehreinheit.raumtypalternativ,
+												tbl_lehreinheit.stundenblockung,
+												tbl_lehreinheit.wochenrythmus,
+												lema.semesterstunden,
+												lema.planstunden,
+												tbl_lehreinheit.start_kw,
+												tbl_lehreinheit.anmerkung,
+												tbl_lehreinheit.studiensemester_kurzbz');
+
+		$this->_ci->LehreinheitModel->addJoin('lehre.tbl_lehreinheitmitarbeiter lema', 'tbl_lehreinheit.lehreinheit_id = lema.lehreinheit_id');
+		$this->_ci->LehreinheitModel->addJoin('lehre.tbl_lehreinheitgruppe lvb', 'tbl_lehreinheit.lehreinheit_id = lvb.lehreinheit_id');
+		$this->_ci->LehreinheitModel->addJoin('public.tbl_studiengang', 'lvb.studiengang_kz = tbl_studiengang.studiengang_kz');
+		$this->_ci->LehreinheitModel->addJoin('lehre.tbl_lehrveranstaltung lehrfach', 'tbl_lehreinheit.lehrfach_id = lehrfach.lehrveranstaltung_id');
+		$this->_ci->LehreinheitModel->addJoin('public.tbl_mitarbeiter', 'lema.mitarbeiter_uid = tbl_mitarbeiter.mitarbeiter_uid');
+		$this->_ci->LehreinheitModel->addJoin('lehre.tbl_lehrform', 'tbl_lehrform.lehrform_kurzbz = tbl_lehreinheit.lehrform_kurzbz');
+
+		$this->_ci->MitarbeiterModel->db->group_start();
+
+		foreach ($query_words as $word)
+		{
+			$this->_ci->LehreinheitModel->db->group_start();
+			$this->_ci->LehreinheitModel->db->where('lema.mitarbeiter_uid ILIKE', "%" . $word . "%");
+			$this->_ci->LehreinheitModel->db->or_where('lvb.gruppe_kurzbz ILIKE', "%" . $word . "%");
+			$this->_ci->LehreinheitModel->db->or_where('tbl_studiengang.kurzbzlang ILIKE', "%" . $word . "%");
+			$this->_ci->LehreinheitModel->db->or_where('lvb.verband ILIKE', "%" . $word . "%");
+			$this->_ci->LehreinheitModel->db->or_where('lvb.gruppe ILIKE', "%" . $word . "%");
+			$this->_ci->LehreinheitModel->db->or_where('lehrfach.bezeichnung ILIKE', "%" . $word . "%");
+
+			if (is_numeric($word))
+			{
+				$this->_ci->LehreinheitModel->db->or_where('tbl_studiengang.studiengang_kz', $word);
+				$this->_ci->LehreinheitModel->db->or_where('lvb.semester', $word);
+			}
+			$this->_ci->LehreinheitModel->db->group_end();
+
+		}
+		$this->_ci->LehreinheitModel->db->group_end();
+		$this->_ci->LehreinheitModel->db->where('tbl_lehreinheit.studiensemester_kurzbz = \'SS2025\'');
+		$this->_ci->LehreinheitModel->db->where(array('tbl_lehrform.verplanen' => true));
+
+		$result = $this->_ci->LehreinheitModel->load();
+
+		$this->terminateWithSuccess(hasData($result) ? getData($result) : array());
+	}
+
+	public function getByStg()
+	{
+		$this->_ci->form_validation->set_data($_POST);
+		$this->_ci->form_validation->set_rules('studiengaenge[]',"studiengaenge","required");
+		$this->_ci->form_validation->set_rules('studiensemester_kurzbz',"studiensemester_kurzbz","required");
+
+		if($this->_ci->form_validation->run() === FALSE)
+			$this->terminateWithValidationErrors($this->_ci->form_validation->error_array());
+
+		$studiengaenge = $this->input->post('studiengaenge');
+		$studiensemester_kurzbz = $this->input->post('studiensemester_kurzbz');
+
+		$this->_ci->LehreinheitModel->addSelect('
+			tbl_lehreinheit.lehreinheit_id,
+			tbl_lehreinheit.lvnr,
+			tbl_lehreinheit.lehrfach_id,
+			lehrfach.kurzbz AS lehrfach,
+			lehrfach.bezeichnung AS lehrfach_bez,
+			lehrfach.farbe AS lehrfach_farbe,
+			tbl_lehreinheit.lehrform_kurzbz AS lehrform,
+			lema.mitarbeiter_uid AS lektor_uid,
+			ma.kurzbz AS lektor,
+			tbl_person.vorname,
+			tbl_person.nachname,
+			tbl_studiengang.studiengang_kz,
+			upper(tbl_studiengang.typ::character varying::text || tbl_studiengang.kurzbz::text) AS studiengang,
+			lvb.semester,
+			lvb.verband,
+			lvb.gruppe,
+			lvb.gruppe_kurzbz,
+			tbl_lehreinheit.raumtyp,
+			tbl_lehreinheit.raumtypalternativ,
+			tbl_lehreinheit.stundenblockung,
+			tbl_lehreinheit.wochenrythmus,
+			lema.semesterstunden,
+			lema.planstunden,
+			tbl_lehreinheit.start_kw,
+			tbl_lehreinheit.anmerkung,
+			tbl_lehreinheit.studiensemester_kurzbz
+		');
+		$this->_ci->LehreinheitModel->addJoin('lehre.tbl_lehreinheitmitarbeiter lema', 'tbl_lehreinheit.lehreinheit_id = lema.lehreinheit_id');
+		$this->_ci->LehreinheitModel->addJoin('lehre.tbl_lehreinheitgruppe lvb', 'tbl_lehreinheit.lehreinheit_id = lvb.lehreinheit_id');
+		$this->_ci->LehreinheitModel->addJoin('public.tbl_studiengang', 'lvb.studiengang_kz = tbl_studiengang.studiengang_kz');
+		$this->_ci->LehreinheitModel->addJoin('lehre.tbl_lehrveranstaltung', 'tbl_lehreinheit.lehrveranstaltung_id = tbl_lehrveranstaltung.lehrveranstaltung_id');
+		$this->_ci->LehreinheitModel->addJoin('lehre.tbl_lehrveranstaltung lehrfach', 'tbl_lehreinheit.lehrfach_id = lehrfach.lehrveranstaltung_id');
+		$this->_ci->LehreinheitModel->addJoin('public.tbl_mitarbeiter ma', 'lema.mitarbeiter_uid = ma.mitarbeiter_uid');
+		$this->_ci->LehreinheitModel->addJoin('lehre.tbl_lehrform', 'tbl_lehrform.lehrform_kurzbz = tbl_lehreinheit.lehrform_kurzbz');
+		$this->_ci->LehreinheitModel->addJoin('public.tbl_benutzer', 'ma.mitarbeiter_uid = tbl_benutzer.uid');
+		$this->_ci->LehreinheitModel->addJoin('public.tbl_person', 'tbl_benutzer.person_id = tbl_person.person_id');
+
+		$this->_ci->LehreinheitModel->db->group_start();
+		$first = true;
+		foreach ($studiengaenge as $studiengang)
+		{
+			if ($first)
+				$this->_ci->LehreinheitModel->db->group_start();
+			else
+			{
+				$this->_ci->LehreinheitModel->db->or_group_start();
+			}
+			$first = false;
+
+			$this->_ci->LehreinheitModel->db->where('tbl_lehrveranstaltung.studiengang_kz', $studiengang['studiengang_kz']);
+
+			if (isset($studiengang['semester']))
+				$this->_ci->LehreinheitModel->db->where('tbl_lehrveranstaltung.semester', $studiengang['semester']);
+
+			if (isset($studiengang['orgform_kurzbz']))
+				$this->_ci->LehreinheitModel->db->where('tbl_lehrveranstaltung.orgform_kurzbz', $studiengang['orgform_kurzbz']);
+
+			$this->_ci->LehreinheitModel->db->group_end();
+		}
+		$this->_ci->LehreinheitModel->db->group_end();
+
+		$result = $this->_ci->LehreinheitModel->loadWhere(array(
+			'tbl_lehrform.verplanen' => true,
+			'tbl_lehreinheit.studiensemester_kurzbz' => $studiensemester_kurzbz
+		));
+
+		$result = hasData($result) ? getData($result) : array();
+
+		$lehreinheit_ids = array_values(array_unique(array_column($result, 'lehreinheit_id')));
+
+		$offen_map = array();
+		if (!empty($lehreinheit_ids))
+		{
+			$offen_result = $this->_ci->LehreinheitModel->getOffeneStunden($lehreinheit_ids);
+			if (hasData($offen_result))
+			{
+				foreach (getData($offen_result) as $row)
+				{
+					$offen_map[$row->lehreinheit_id . '_' . $row->mitarbeiter_uid] = $row;
+				}
+			}
+		}
+
+		$grouped = array();
+
+		foreach ($result as $row)
+		{
+			$lehreinheit_id = $row->lehreinheit_id;
+			if (!isset($grouped[$lehreinheit_id]))
+			{
+				$grouped[$lehreinheit_id] = (object)array(
+					'lehrfach_id' => $row->lehrfach_id,
+					'lehrfach_bez' => $row->lehrfach_bez,
+					'lehrfach_farbe' => $row->lehrfach_farbe,
+					'studiengang_kz' => $row->studiengang_kz,
+					'studiengang' => $row->studiengang,
+					'semester' => $row->semester,
+					'verband' => $row->verband,
+					'gruppe' => $row->gruppe,
+					'gruppe_kurzbz' => $row->gruppe_kurzbz,
+					'raumtyp' => $row->raumtyp,
+					'raumtypalternativ' => $row->raumtypalternativ,
+					'anmerkung' => $row->anmerkung,
+					'studiensemester_kurzbz' => $row->studiensemester_kurzbz,
+					'fachbereich_kurzbz' => isset($row->fachbereich_kurzbz) ? $row->fachbereich_kurzbz : null,
+					'lektoren' => array(),
+					'lehreinheit_id' => $lehreinheit_id,
+					'lvnr' => array(),
+					'lehrfach' => array(),
+					'lehrform' => array(),
+					'stundenblockung' => array(),
+					'wochenrythmus' => array(),
+					'planstunden' => array(),
+					'start_kw' => array(),
+					'verplant' => array(),
+					'offenestunden' => array(),
+					'lehrverband' => array(),
+					'lem' => array(),
+					'verplant_gesamt' => 0,
+				);
+			}
+
+			$group = $grouped[$lehreinheit_id];
+
+			$group->lektoren[$row->lektor_uid] = (object)array(
+				'uid' => $row->lektor_uid,
+				'kurzbz' => trim($row->lektor),
+				'name' => $row->vorname . ' ' . $row->nachname,
+			);
+
+			$group->lvnr[] = $row->lvnr;
+			$group->lehrfach[] = $row->lehrfach;
+			$group->lehrform[] = $row->lehrform;
+			$group->stundenblockung[] = $row->stundenblockung;
+			$group->wochenrythmus[] = $row->wochenrythmus;
+			$group->planstunden[] = $row->planstunden;
+			$group->start_kw[] = $row->start_kw;
+
+			$offen_key = $lehreinheit_id . '_' . $row->lektor_uid;
+			$offen = isset($offen_map[$offen_key]) ? $offen_map[$offen_key] : null;
+			$verplant_wert = $offen ? $offen->verplant : 0;
+			$offenestunden_wert = $offen ? $offen->offenestunden : 0;
+
+			$group->verplant[] = $verplant_wert;
+			$group->offenestunden[] = $offenestunden_wert;
+			$group->verplant_gesamt += $verplant_wert;
+
+			$lvb = $row->studiengang . '-' . $row->semester;
+
+			if ($row->verband != '' && $row->verband != ' ' && $row->verband != '0' && $row->verband != null)
+				$lvb .= $row->verband;
+
+			if ($row->gruppe != '' && $row->gruppe != ' ' && $row->gruppe != '0' && $row->gruppe != null)
+				$lvb .= $row->gruppe;
+
+			$group->lehrverband[] = ($row->gruppe_kurzbz != '' && $row->gruppe_kurzbz != null) ? $row->gruppe_kurzbz : $lvb;
+
+			$group->lem[] = array(
+				'lehreinheit_id' => $row->lehreinheit_id,
+				'mitarbeiter_uid' => $row->lektor_uid,
+			);
+		}
+
+		foreach ($grouped as $group)
+		{
+			$group->lektoren = array_values($group->lektoren);
+			$group->lehrverband = array_values(array_unique($group->lehrverband));
+			$group->lehrfach = $this->_formatArr($group->lehrfach);
+			$group->lehrform = $this->_formatArr($group->lehrform);
+			$group->stundenblockung = $this->_formatArr($group->stundenblockung);
+			$group->wochenrythmus = $this->_formatArr($group->wochenrythmus);
+			$group->planstunden = $this->_formatArr($group->planstunden);
+			$group->start_kw = $this->_formatArr($group->start_kw);
+			$group->verplant = $this->_formatArr($group->verplant);
+			$group->offenestunden = $this->_formatArr($group->offenestunden);
+		}
+
+		$this->terminateWithSuccess(array_values($grouped));
+	}
+
+	private function _formatArr($arr)
+	{
+		$values = array_values(array_unique($arr));
+		$formatted = implode(' ', $values);
+
+		if (count($values) > 1)
+			$formatted .= ' ?';
+
+		return $formatted;
+	}
+
+
+}

application/controllers/api/frontend/v1/tempus/Favorites.php

@@ -0,0 +1,47 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+class Favorites extends FHCAPI_Controller
+{
+	public function __construct()
+	{
+		parent::__construct([
+			'index' => self::PERM_LOGGED,
+			'set' => self::PERM_LOGGED
+		]);
+
+		// Load models
+		$this->load->model('system/Variable_model', 'VariableModel');
+	}
+
+	public function index()
+	{
+		$result = $this->VariableModel->getVariables(getAuthUID(), ['tempus_favorites']);
+
+		$data = $this->getDataOrTerminateWithError($result);
+
+		if (!$data)
+			$this->terminateWithSuccess(null);
+		else
+			$this->terminateWithSuccess(isset($data['tempus_favorites']) ? $data['tempus_favorites'] : null);
+	}
+
+	public function set()
+	{
+		$this->load->library('form_validation');
+
+		$this->form_validation->set_rules('favorites', 'Favorites', 'required');
+
+		if (!$this->form_validation->run())
+			$this->terminateWithValidationErrors($this->form_validation->error_array());
+
+		$favorites = $this->input->post('favorites');
+
+		$result = $this->VariableModel->setVariable(getAuthUID(), 'tempus_favorites', $favorites);
+
+		$this->getDataOrTerminateWithError($result);
+		
+		$this->terminateWithSuccess(true);
+	}
+}

application/controllers/api/frontend/v1/tempus/Info.php

@@ -0,0 +1,37 @@
+<?php
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+class Info extends FHCAPI_Controller
+{
+
+	private $_ci;
+
+	/**
+	 * Object initialization
+	 */
+	public function __construct()
+	{
+		parent::__construct([
+			'getStudiengaenge' => self::PERM_LOGGED,
+		]);
+
+		$this->_ci =& get_instance();
+
+		$this->load->model('organisation/Studiengang_model', 'StudiengangModel');
+
+		$this->loadPhrases([
+			'ui'
+		]);
+
+	}
+
+	public function getStudiengaenge()
+	{
+		$this->_ci->StudiengangModel->addDistinct();
+		$this->_ci->StudiengangModel->addSelect('studiengang_kz');
+		$this->_ci->StudiengangModel->addSelect("CONCAT(kurzbzlang, ' (', UPPER(CONCAT(typ, kurzbz)), ') - ', tbl_studiengang.bezeichnung) AS name");
+
+		$result = $this->getDataOrTerminateWithError($this->_ci->StudiengangModel->load());
+		$this->terminateWithSuccess($result);
+	}
+}

application/controllers/api/frontend/v1/tempus/Kalender.php

@@ -0,0 +1,437 @@
+<?php
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+class Kalender extends FHCAPI_Controller
+{
+
+	private $_ci;
+	const ALLOWED_PLAN_FILTER = ['ort', 'uid', 'stg'];
+	const ALLOWED_ROOM_FILTER = ['lehreinheit_id', 'kalender_id'];
+
+	const ALLOWED_TO_UPDATE = ['start_time', 'end_time', 'ort_kurzbz'];
+	/**
+	 * Object initialization
+	 */
+	public function __construct()
+	{
+		parent::__construct([
+			'getStunden' => self::PERM_LOGGED,
+			'getCalendarHours' => self::PERM_LOGGED,
+			'getPlan' => self::PERM_LOGGED,
+			'getPlanByOrt' => self::PERM_LOGGED,
+			'getRaumvorschlag' => self::PERM_LOGGED,
+			'getHistory' => 'lehre/lvplan:rw',
+			'deleteEntry' => 'lehre/lvplan:rw',
+			'syncToLecturer' => 'lehre/lvplan:rw',
+			'syncToStudent' => 'lehre/lvplan:rw',
+			'getPlanLecturer' =>'lehre/lvplan:rw',
+			'getPlanStudent' => 'lehre/lvplan:rw',
+			'getZeitwuensche' => self::PERM_LOGGED,
+			'getZeitsperren' => self::PERM_LOGGED,
+			'updateKalenderEvent' => 'lehre/lvplan:rw',
+			'addKalenderEvent' => 'lehre/lvplan:rw',
+			'calculateMultiWeekPlan' => 'lehre/lvplan:rw',
+			'confirmMultiWeekPlan' => 'lehre/lvplan:rw',
+			'addToKalenderEvent' => 'lehre/lvplan:rw',
+			'sync' => 'lehre/lvplan:rw',
+		]);
+
+		$this->_ci =& get_instance();
+
+		$this->_ci->load->library('LogLib');
+		$this->_ci->load->library('form_validation');
+		$this->_ci->load->library('KalenderLib', ["uid" => getAuthUID()]);
+		$this->_ci->load->library('RaumvorschlagLib', ["uid" => getAuthUID()]);
+		$this->loadPhrases([
+			'ui'
+		]);
+		$this->_ci->load->config('tempus');
+
+
+		$this->_ci->loglib->setConfigs(array(
+			'classIndex' => 5,
+			'functionIndex' => 5,
+			'lineIndex' => 4,
+			'dbLogType' => 'API', // required
+			'dbExecuteUser' => 'RESTful API'
+		));
+	}
+
+	//------------------------------------------------------------------------------------------------------------------
+	// Public methods
+	/**
+	 * fetches Stunden layout from database
+	 * @access public
+	 *
+	 */
+	public function getStunden()
+	{
+		$this->load->model('ressource/Stunde_model', 'StundeModel');
+
+		$this->_ci->StundeModel->addOrder('stunde', 'ASC');
+		$stunden = $this->_ci->StundeModel->load();
+
+		$stunden = $this->getDataOrTerminateWithError($stunden);
+
+		$this->terminateWithSuccess($stunden);
+	}
+
+	public function getCalendarHours()
+	{
+		$calender_start = $this->_ci->config->item('calendar_start') ?? 7;
+		$calender_end = $this->_ci->config->item('calendar_end') ?? 23;
+
+		$this->terminateWithSuccess(array(
+			'start' => $calender_start,
+			'end' => $calender_end
+		));
+	}
+
+	public function getPlan()
+	{
+		$this->_ci->form_validation->set_data($_POST);
+		$this->_ci->form_validation->set_rules('start_date',"start_date","required");
+		$this->_ci->form_validation->set_rules('end_date',"end_date","required");
+
+		if($this->_ci->form_validation->run() === FALSE)
+			$this->terminateWithValidationErrors($this->_ci->form_validation->error_array());
+
+		$start_date = $this->_ci->input->post('start_date', TRUE);
+		$end_date = $this->_ci->input->post('end_date', TRUE);
+
+		$filter = $this->_checkFilter(self::ALLOWED_PLAN_FILTER);
+
+		$stundenplan_data = $this->_ci->kalenderlib->getPlanForPlanner(
+			$start_date,
+			$end_date,
+			isset($filter->ort) ? $filter->ort : null,
+			isset($filter->uid) ? $filter->uid : null,
+			isset($filter->stg) ? $filter->stg : null
+		);
+
+		$this->terminateWithSuccess($stundenplan_data);
+	}
+
+	public function getPlanStudent()
+	{
+		$this->_ci->form_validation->set_data($_GET);
+		$this->_ci->form_validation->set_rules('start_date',"start_date","required");
+		$this->_ci->form_validation->set_rules('end_date',"end_date","required");
+
+		if($this->_ci->form_validation->run() === FALSE)
+			$this->terminateWithValidationErrors($this->_ci->form_validation->error_array());
+
+		$start_date = $this->_ci->input->get('start_date', TRUE);
+		$end_date = $this->_ci->input->get('end_date', TRUE);
+
+		$stundenplan_data = $this->_ci->kalenderlib->getPlanForStudent(
+			$start_date,
+			$end_date
+		);
+
+		$this->terminateWithSuccess($stundenplan_data);
+	}
+
+	public function getPlanLecturer()
+	{
+		$this->_ci->form_validation->set_data($_GET);
+		$this->_ci->form_validation->set_rules('start_date',"start_date","required");
+		$this->_ci->form_validation->set_rules('end_date',"end_date","required");
+
+		if($this->_ci->form_validation->run() === FALSE)
+			$this->terminateWithValidationErrors($this->_ci->form_validation->error_array());
+
+		$start_date = $this->_ci->input->get('start_date', TRUE);
+		$end_date = $this->_ci->input->get('end_date', TRUE);
+
+		$stundenplan_data = $this->_ci->kalenderlib->getPlanForLecturer(
+			$start_date,
+			$end_date
+		);
+
+		$this->terminateWithSuccess($stundenplan_data);
+	}
+
+	public function getPlanByOrt($start_date = null, $end_date = null, $ort = null)
+	{
+		if (!isset($start_date) || !isset($end_date) || !isset($ort))
+		{
+			$this->_ci->form_validation->set_data($_GET);
+			$this->_ci->form_validation->set_rules('start_date',"start_date","required");
+			$this->_ci->form_validation->set_rules('end_date',"end_date","required");
+			$this->_ci->form_validation->set_rules('ort',"ort","required");
+			if($this->_ci->form_validation->run() === FALSE)
+				$this->terminateWithValidationErrors($this->_ci->form_validation->error_array());
+
+			$start_date = $this->_ci->input->get('start_date', TRUE);
+			$end_date = $this->_ci->input->get('end_date', TRUE);
+			$ort = $this->_ci->input->get('ort', TRUE);
+		}
+
+		$this->terminateWithSuccess($this->_ci->kalenderlib->getPlanByOrt($start_date, $end_date, $ort));
+	}
+
+	public function getZeitsperren()
+	{
+		$this->_ci->form_validation->set_data($_GET);
+		$this->_ci->form_validation->set_rules('start_date',"start_date","required");
+		$this->_ci->form_validation->set_rules('end_date',"end_date","required");
+		$this->_ci->form_validation->set_rules('emp',"emp","required");
+		if($this->_ci->form_validation->run() === FALSE)
+			$this->terminateWithValidationErrors($this->_ci->form_validation->error_array());
+
+		$start_date = $this->_ci->input->get('start_date', TRUE);
+		$end_date = $this->_ci->input->get('end_date', TRUE);
+		$emp = $this->_ci->input->get('emp', TRUE);
+
+		$stundenplan_data = $this->_ci->kalenderlib->getZeitsperren($start_date, $end_date, $emp);
+
+		$this->terminateWithSuccess($stundenplan_data);
+	}
+
+	public function getZeitwuensche()
+	{
+		$this->_ci->form_validation->set_data($_GET);
+		$this->_ci->form_validation->set_rules('start_date',"start_date","required");
+		$this->_ci->form_validation->set_rules('end_date',"end_date","required");
+		$this->_ci->form_validation->set_rules('emp',"emp","required");
+
+		if($this->_ci->form_validation->run() === FALSE)
+			$this->terminateWithValidationErrors($this->_ci->form_validation->error_array());
+
+		$start_date = $this->_ci->input->get('start_date', TRUE);
+		$end_date = $this->_ci->input->get('end_date', TRUE);
+		$emp = $this->_ci->input->get('emp', TRUE);
+
+		$stundenplan_data = $this->_ci->kalenderlib->getZeitwuensche($start_date, $end_date, $emp);
+
+		$this->terminateWithSuccess($stundenplan_data);
+	}
+
+	public function updateKalenderEvent()
+	{
+		$this->_ci->form_validation->set_data($_POST);
+		$this->_ci->form_validation->set_rules('kalender_id',"kalender_id","required");
+
+		if($this->_ci->form_validation->run() === FALSE)
+			$this->terminateWithValidationErrors($this->_ci->form_validation->error_array());
+
+		$updateFields = $this->_checkUpdate($this->_ci->input->post('updatedInfos', TRUE));
+		$kalender_id = $this->_ci->input->post('kalender_id', TRUE);
+
+		$result = $this->_ci->kalenderlib->updateKalenderEvent($kalender_id, $updateFields->ort_kurzbz ?? null,  $updateFields->start_time ?? null,  $updateFields->end_time ?? null);
+
+		if (isError($result))
+			$this->terminateWithError(getError($result),  $result->code);
+
+		$this->terminateWithSuccess(getData($result));
+	}
+
+	public function getRaumvorschlag()
+	{
+		$this->_ci->form_validation->set_data($_POST);
+
+		$filter = $this->_checkFilter(self::ALLOWED_ROOM_FILTER);
+		$this->terminateWithSuccess($this->_ci->raumvorschlaglib->getVorschlaege($filter->kalender_id));
+	}
+
+	public function getHistory()
+	{
+		$this->_ci->form_validation->set_data($_GET);
+		$this->_ci->form_validation->set_rules('kalender_id',"kalender_id","required");
+
+		if($this->_ci->form_validation->run() === FALSE)
+			$this->terminateWithValidationErrors($this->_ci->form_validation->error_array());
+
+		$kalender_id = $this->_ci->input->get('kalender_id', TRUE);
+
+		$result = $this->_ci->kalenderlib->getHistory($kalender_id);
+
+		if (isError($result))
+			$this->terminateWithError(getError($result));
+
+		$this->terminateWithSuccess(getData($result));
+	}
+
+	public function deleteEntry()
+	{
+		$this->_ci->form_validation->set_data($_POST);
+		$this->_ci->form_validation->set_rules('kalender_id', "kalender_id", "required");
+
+		if($this->_ci->form_validation->run() === FALSE)
+			$this->terminateWithValidationErrors($this->_ci->form_validation->error_array());
+
+		$kalender_id = $this->_ci->input->post('kalender_id', TRUE);
+
+		$result = $this->_ci->kalenderlib->deleteEntry($kalender_id);
+
+		if (isError($result))
+			$this->terminateWithError(getError($result));
+
+		$this->terminateWithSuccess(getData($result));
+	}
+
+	public function sync()
+	{
+		$result = $this->_ci->kalenderlib->sync();
+		$this->terminateWithSuccess(getData($result));
+	}
+	public function syncToLecturer()
+	{
+		$this->_ci->form_validation->set_data($_POST);
+		$this->_ci->form_validation->set_rules('kalender_id', "kalender_id", "required");
+
+		if($this->_ci->form_validation->run() === FALSE)
+			$this->terminateWithValidationErrors($this->_ci->form_validation->error_array());
+
+		$kalender_id = $this->_ci->input->post('kalender_id', TRUE);
+
+		$result = $this->_ci->kalenderlib->updateStatus($kalender_id, 'sync_preview');
+
+		if (isError($result))
+			$this->terminateWithError(getError($result));
+
+		$this->terminateWithSuccess(getData($result));
+	}
+	public function syncToStudent()
+	{
+		$this->_ci->form_validation->set_data($_POST);
+		$this->_ci->form_validation->set_rules('kalender_id', "kalender_id", "required");
+
+		if($this->_ci->form_validation->run() === FALSE)
+			$this->terminateWithValidationErrors($this->_ci->form_validation->error_array());
+
+		$kalender_id = $this->_ci->input->post('kalender_id', TRUE);
+
+		$result = $this->_ci->kalenderlib->updateStatus($kalender_id, 'sync_live');
+
+		if (isError($result))
+			$this->terminateWithError(getError($result));
+
+		$this->terminateWithSuccess(getData($result));
+	}
+	public function addKalenderEvent()
+	{
+		$this->_ci->form_validation->set_data($_POST);
+		$this->_ci->form_validation->set_rules('lehreinheit_id',"lehreinheit_id","required");
+		$this->_ci->form_validation->set_rules('start_date',"start_date","required");
+		$this->_ci->form_validation->set_rules('end_date',"end_date","required");
+
+		if($this->_ci->form_validation->run() === FALSE)
+			$this->terminateWithValidationErrors($this->_ci->form_validation->error_array());
+
+		$lehreinheit_id = $this->_ci->input->post('lehreinheit_id', TRUE);
+		$ort_kurzbz = $this->_ci->input->post('ort_kurzbz', TRUE);
+		$start_date = $this->_ci->input->post('start_date', TRUE);
+		$end_date = $this->_ci->input->post('end_date', TRUE);
+		$result = $this->_ci->kalenderlib->addKalenderEvent($start_date, $end_date, $lehreinheit_id, $ort_kurzbz);
+
+		if (isError($result))
+			$this->terminateWithError(getError($result));
+
+		$this->terminateWithSuccess(getData($result));
+	}
+
+	public function calculateMultiWeekPlan()
+	{
+		$this->_ci->form_validation->set_data($_POST);
+		$this->_ci->form_validation->set_rules('lehreinheit_id',"lehreinheit_id","required");
+		$this->_ci->form_validation->set_rules('start_date',"start_date","required");
+		$this->_ci->form_validation->set_rules('end_date',"end_date","required");
+
+		if($this->_ci->form_validation->run() === FALSE)
+			$this->terminateWithValidationErrors($this->_ci->form_validation->error_array());
+
+		$lehreinheit_id = $this->_ci->input->post('lehreinheit_id', TRUE);
+		$ort_kurzbz = $this->_ci->input->post('ort_kurzbz', TRUE);
+		$start_date = $this->_ci->input->post('start_date', TRUE);
+		$end_date = $this->_ci->input->post('end_date', TRUE);
+
+		$result = $this->_ci->kalenderlib->calculateMultiWeekPlan($start_date, $end_date, $lehreinheit_id, $ort_kurzbz);
+
+		if (isError($result))
+			$this->terminateWithError(getError($result));
+
+		$this->terminateWithSuccess(getData($result));
+	}
+
+	public function confirmMultiWeekPlan()
+	{
+		$this->_ci->form_validation->set_data($_POST);
+		$this->_ci->form_validation->set_rules('plan[]',"plan","required");
+		$this->_ci->form_validation->set_rules('lehreinheit_id',"lehreinheit_id","required");
+
+		if($this->_ci->form_validation->run() === FALSE)
+			$this->terminateWithValidationErrors($this->_ci->form_validation->error_array());
+
+		$plan = $this->_ci->input->post('plan', TRUE);
+		$lehreinheit_id = $this->_ci->input->post('lehreinheit_id', TRUE);
+
+		$result = $this->_ci->kalenderlib->confirmMultiWeekPlan($plan, $lehreinheit_id);
+
+		if (isError($result))
+			$this->terminateWithError(getError($result));
+
+		$this->terminateWithSuccess(getData($result));
+	}
+
+	public function addToKalenderEvent()
+	{
+		$this->_ci->form_validation->set_data($_POST);
+		$this->_ci->form_validation->set_rules('target_kalender_id',"target_kalender_id","required");
+		$this->_ci->form_validation->set_rules('lehreinheit_id',"lehreinheit_id","required");
+
+		if($this->_ci->form_validation->run() === FALSE)
+			$this->terminateWithValidationErrors($this->_ci->form_validation->error_array());
+
+		$target_kalender_id = $this->_ci->input->post('target_kalender_id', TRUE);
+		$lehreinheit_id = $this->_ci->input->post('lehreinheit_id', TRUE);
+
+		$result = $this->_ci->kalenderlib->addToKalenderEvent($target_kalender_id, $lehreinheit_id);
+
+		if (isError($result))
+			$this->terminateWithError(getError($result));
+
+		$this->terminateWithSuccess(getData($result));
+	}
+
+
+	private function _checkFilter($filters)
+	{
+		$filter_valid = true;
+		$filter_object = new stdClass();
+		foreach ($filters as $filter)
+		{
+			if ($this->_ci->input->post($filter))
+			{
+				$filter_valid = true;
+				$filter_object->$filter = $this->_ci->input->post($filter);
+			}
+		}
+
+		if (!$filter_valid)
+			$this->terminateWithError($this->p->t('ui', 'ungueltigeParameter'), self::ERROR_TYPE_GENERAL);
+
+		return $filter_object;
+	}
+
+	private function _checkUpdate($updateInfos)
+	{
+		$update_valid = false;
+		$update_object = new stdClass();
+		foreach (self::ALLOWED_TO_UPDATE as $filter)
+		{
+			if (isset($updateInfos[$filter]))
+			{
+				$update_valid = true;
+				$update_object->$filter = $updateInfos[$filter];
+			}
+		}
+
+		if (!$update_valid)
+			$this->terminateWithError($this->p->t('ui', 'ungueltigeParameter'), self::ERROR_TYPE_GENERAL);
+
+
+		return $update_object;
+	}
+}

application/controllers/api/frontend/v1/tempus/OperationalResourceToCalenderAPI.php

@@ -0,0 +1,84 @@
+<?php
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+class OperationalResourceToCalenderAPI extends FHCAPI_Controller
+{
+	/**
+	 * Object initialization
+	 */
+	public function __construct()
+	{
+		parent::__construct([
+			'getAssignedResourcesByCalender' => ['admin:r', 'assistenz:r'],
+			'storeResourcesToCalendarRelationship' => ['admin:w', 'assistenz:w'],
+			'getSchedulableResourcesByCalendar' => ['admin:r', 'assistenz:r'],
+		]);
+
+		$this->load->model('ressource/BetriebsmittelKalender_model', 'BetriebsmittelKalenderModel');
+		$this->load->model('ressource/Betriebsmittel_model', 'BetriebsmittelModel');
+		$this->load->model('ressource/Kalender_model', 'KalenderModel');
+
+		$this->load->library('CollisionChecker', ["uid" => getAuthUID()]);
+		$this->load->library('KalenderLib', ["uid" => getAuthUID()]);
+	}
+
+	//------------------------------------------------------------------------------------------------------------------
+	// Public methods
+	public function getSchedulableResourcesByCalendar($calenderID)
+	{ 
+		if (!isset($calenderID)) $this->terminateWithError("Missing required parameter 'kalender_id'");
+
+		$result = $this->KalenderModel->loadWhere(['kalender_id' => $calenderID]);
+		if (isError($result)) $this->terminateWithError("Calendar with id '$calenderID' does not have a valid group id");
+ 
+		$calender = $this->getDataOrTerminateWithError($result)[0];
+		if (!isset($calender)) $this->terminateWithError("Calendar with id '$calenderID' not found");
+
+		$result = $this->BetriebsmittelModel->getSchedulableEntriesByDatetimeInterval($calender->von, $calender->bis);
+		$this->terminateWithSuccess($this->getDataOrTerminateWithError($result));
+	}
+
+	public function getAssignedResourcesByCalender($calenderID)
+	{
+		if (!isset($calenderID)) $this->terminateWithError("Missing required parameter 'kalender_id'");
+
+		$result = $this->KalenderModel->loadWhere(['kalender_id' => $calenderID]);
+		if (empty($result)) $this->terminateWithError("Calendar with id '$calenderID' not found");
+ 
+		$calenderGroupID = $this->getDataOrTerminateWithError($result)[0]->eindeutige_kalender_gruppen_id;
+		if (!isset($calenderGroupID)) $this->terminateWithError("Calendar with id '$calenderID' does not have a valid group id");
+
+
+		$this->BetriebsmittelKalenderModel->addSelect(['tbl_betriebsmittel_kalender.*', 'tbl_betriebsmittel.beschreibung', 'tbl_betriebsmittel.verplanen']);
+		$this->BetriebsmittelKalenderModel->addJoin('wawi.tbl_betriebsmittel', 'betriebsmittel_id');
+		$result = $this->BetriebsmittelKalenderModel->loadWhere([
+			'eindeutige_kalender_gruppen_id' => $calenderGroupID,
+			'tbl_betriebsmittel.verplanen' => true,
+		]);
+
+		$this->terminateWithSuccess($this->getDataOrTerminateWithError($result));
+	}
+
+	public function storeResourcesToCalendarRelationship()
+	{
+		$calenderID = $this->input->post('kalender_id');
+		$assignedResources = $this->input->post('assignedResources');
+
+		if (!isset($calenderID)) $this->terminateWithError("Missing required parameter 'kalender_id'", 'general');
+		if (!isset($assignedResources)) $this->terminateWithError("Missing required parameter 'assignedResources'", 'general');
+
+		$result = $this->KalenderModel->loadWhere(['kalender_id' => $calenderID]);
+		if (empty($result)) $this->terminateWithError("Calendar with id '$calenderID' not found");
+
+		$calendar = $this->getDataOrTerminateWithError($result)[0];
+		
+		$calenderGroupID = $calendar->eindeutige_kalender_gruppen_id;
+		if (!isset($calenderGroupID)) $this->terminateWithError("Calendar with id '$calenderID' does not have a valid group id");
+
+		$result = $this->kalenderlib->addOperationalResourcesToKalenderEvent($calendar, $assignedResources);
+		if (isError($result))
+			$this->terminateWithError(getError($result));
+
+		$this->terminateWithSuccess(['message' => 'Resources assigned successfully']);
+	}
+}

application/controllers/api/frontend/v1/tempus/Reservierung.php

@@ -0,0 +1,231 @@
+<?php
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+class Reservierung extends FHCAPI_Controller
+{
+	private $_ci;
+
+	/**
+	 * Object initialization
+	 */
+	public function __construct()
+	{
+		parent::__construct([
+			'addReservierung' => 'lehre/lvplan:rw',
+			'getRollen' => 'lehre/lvplan:rw',
+			'getInformation' => 'lehre/lvplan:rw',
+			'getLektor' => 'lehre/lvplan:rw',
+			'searchGroup' => 'lehre/lvplan:rw',
+		]);
+
+		$this->_ci =& get_instance();
+
+		$this->_ci->load->library('LogLib');
+		$this->_ci->load->library('form_validation');
+		$this->_ci->load->library('KalenderLib', ["uid" => getAuthUID()]);
+
+		$this->_ci->load->model('ressource/Ort_model', 'OrtModel');
+		$this->_ci->load->model('ressource/Kalender_Event_Rolle_model', 'KalenderEventRolleModel');
+		$this->_ci->load->model('organisation/Studiengang_model', 'StudiengangModel');
+		$this->_ci->load->model('organisation/Studiensemester_model', 'StudiensemesterModel');
+		$this->_ci->load->model('organisation/gruppe_model', 'GruppeModel');
+
+
+		$this->loadPhrases([
+			'ui'
+		]);
+	}
+
+	//------------------------------------------------------------------------------------------------------------------
+	// Public methods
+
+	public function getInformation()
+	{
+		$return_array = array('berechtigt' => false, 'studiengaenge' => []);
+
+		$this->_ci->OrtModel->db->join("
+					(select ort,standort_id,strasse, plz
+					FROM public.tbl_standort
+					LEFT JOIN public.tbl_adresse USING(adresse_id)
+				) standort", "standort_id", "LEFT", false);
+
+		$raeume = $this->_ci->OrtModel->loadWhere(array('aktiv' => true, 'reservieren' => true));
+		$return_array['raeume'] = hasData($raeume) ? getData($raeume) : [];
+
+		if (!$this->_ci->permissionlib->isBerechtigt('lehre/reservierung'))
+			$this->terminateWithSuccess($return_array);
+
+		$stg_berechtigungen = $this->_ci->permissionlib->getSTG_isEntitledFor('lehre/reservierung');
+		if (isEmptyArray($stg_berechtigungen))
+			$this->terminateWithSuccess($return_array);
+
+		$this->_ci->StudiengangModel->addSelect('studiengang_kz, UPPER(CONCAT(typ, kurzbz)) as kuerzel, kurzbzlang');
+		$this->_ci->StudiengangModel->addOrder('typ, kurzbz');
+		$this->_ci->StudiengangModel->db->where_in('studiengang_kz', $stg_berechtigungen);
+		$studiengaenge = $this->_ci->StudiengangModel->loadWhere(array('aktiv' => true));
+
+		if (isError($studiengaenge))
+			$this->terminateWithError(getError($studiengaenge));
+		$language = getUserLanguage() == 'German' ? 0 : 1;
+		$this->_ci->KalenderEventRolleModel->addOrder('sort');
+		$this->_ci->KalenderEventRolleModel->addSelect('rolle_kurzbz, array_to_json(bezeichnung_mehrsprachig::varchar[])->>'. $language. ' as bezeichnung');
+
+		$rollen = $this->_ci->KalenderEventRolleModel->load();
+
+		$this->_ci->StudiensemesterModel->addOrder('start', 'DESC');
+		$studiensemester = $this->_ci->StudiensemesterModel->load();
+
+		$return_array['studiengaenge'] = hasData($studiengaenge) ? getData($studiengaenge) : [];
+		$return_array['berechtigt'] = true;
+		$return_array['rollen'] = hasData($rollen) ? getData($rollen) : [];
+		$return_array['studiensemester'] = hasData($studiensemester) ? getData($studiensemester) : [];
+
+
+		$this->terminateWithSuccess($return_array);
+	}
+	public function getRaeume()
+	{
+
+		$this->_ci->OrtModel->db->join("
+					(select ort,standort_id,strasse, plz
+					FROM public.tbl_standort
+					LEFT JOIN public.tbl_adresse USING(adresse_id)
+				) standort", "standort_id", "LEFT", false);
+
+		$result = $this->_ci->OrtModel->loadWhere(array('aktiv' => true, 'reservieren' => true));
+
+		$this->terminateWithSuccess(hasData($result) ? getData($result) : []);
+	}
+
+	public function searchGroup()
+	{
+		$query = $this->input->get('query');
+		if (is_null($query))
+			$this->terminateWithError($this->_ci->p->t('ui', 'ungueltigeParameter'), self::ERROR_TYPE_GENERAL);
+
+		$stg_berechtigungen = $this->_ci->permissionlib->getSTG_isEntitledFor('lehre/reservierung');
+
+		if (isEmptyArray($stg_berechtigungen))
+			$this->terminateWithSuccess([]);
+
+
+		$query_words = explode(' ', urldecode($query));
+
+		$gruppen_result = $this->_ci->GruppeModel->search($query_words);
+
+		if (isError($gruppen_result))
+			$this->terminateWithError(getError($gruppen_result), self::ERROR_TYPE_GENERAL);
+
+		$gruppen_array = array();
+
+		if (hasData($gruppen_result))
+			$gruppen_array = getData($gruppen_result);
+
+		$lehrverband_result = $this->_ci->LehrverbandModel->search($query_words);
+
+		$lehrverband_array = array();
+
+		if (isError($lehrverband_result))
+			$this->terminateWithError(getError($lehrverband_result), self::ERROR_TYPE_GENERAL);
+
+		if (hasData($lehrverband_result))
+			$lehrverband_array = getData($lehrverband_result);
+
+		$all_gruppen = array_merge($gruppen_array, $lehrverband_array);
+
+		$gefilterte_gruppen = array_filter($all_gruppen, function($gruppe) use ($stg_berechtigungen)
+		{
+			return in_array($gruppe->studiengang_kz, $stg_berechtigungen);
+		});
+
+		$this->terminateWithSuccess($gefilterte_gruppen);
+	}
+
+	public function getRollen()
+	{
+		$language = getUserLanguage() == 'German' ? 0 : 1;
+
+		$this->_ci->KalenderEventRolleModel->addOrder('sort');
+		$this->_ci->KalenderEventRolleModel->addSelect('rolle_kurzbz, array_to_json(bezeichnung_mehrsprachig::varchar[])->>'. $language. ' as bezeichnung');
+
+		$result = $this->_ci->KalenderEventRolleModel->load();
+
+		$this->terminateWithSuccess(hasData($result) ? getData($result) : []);
+	}
+	public function addReservierung()
+	{
+
+		$this->_ci->form_validation->set_data($_POST);
+		$this->_ci->form_validation->set_rules('titel',"titel","required");
+		$this->_ci->form_validation->set_rules('beschreibung',"beschreibung","required");
+		$this->_ci->form_validation->set_rules('ort_kurzbz[]',"ort_kurzbz","required");
+		$this->_ci->form_validation->set_rules('start_date',"start_date","required");
+		$this->_ci->form_validation->set_rules('end_date',"end_date","required");
+
+
+		if($this->_ci->form_validation->run() === FALSE)
+			$this->terminateWithValidationErrors($this->_ci->form_validation->error_array());
+
+		$titel = $this->_ci->input->post('titel', TRUE);
+		$beschreibung = $this->_ci->input->post('beschreibung', TRUE);
+		$ort_kurzbz = $this->_ci->input->post('ort_kurzbz', TRUE);
+		$start_date = $this->_ci->input->post('start_date', TRUE);
+		$end_date = $this->_ci->input->post('end_date', TRUE);
+		$teilnehmer = $this->_ci->input->post('teilnehmer', TRUE);
+		$specialGroups = $this->_ci->input->post('specialGroups', TRUE);
+		$specialFinalGroups = $this->_ci->input->post('specialFinalGroups', TRUE);
+		$groups = $this->_ci->input->post('groups', TRUE);
+
+		if ($this->_ci->permissionlib->isBerechtigt('lehre/reservierung'))
+		{
+			if (empty($teilnehmer) || !is_array($teilnehmer))
+			{
+				$teilnehmer[] = array('uid' => getAuthUID(), 'rolle' => 'organisator');
+			}
+		}
+		else
+			$teilnehmer[] = array('uid' => getAuthUID(), 'rolle' => 'organisator');
+
+
+		$result = $this->_ci->kalenderlib->addReservierung($titel, $beschreibung, $ort_kurzbz, $start_date, $end_date, $teilnehmer, $specialFinalGroups, $specialGroups, $groups);
+
+
+		if (isError($result))
+			$this->terminateWithError(getError($result));
+
+		$this->terminateWithSuccess($result);
+	}
+
+
+	public function getLektor()
+	{
+		$query = $this->input->get('query');
+
+		if (is_null($query))
+			$this->terminateWithError($this->p->t('ui', 'ungueltigeParameter'), self::ERROR_TYPE_GENERAL);
+
+		$query_words = explode(' ', $query);
+
+		$this->_ci->MitarbeiterModel->addSelect('uid, person_id, vorname, nachname');
+		$this->_ci->MitarbeiterModel->addJoin('public.tbl_benutzer', 'uid = mitarbeiter_uid');
+		$this->_ci->MitarbeiterModel->addJoin('public.tbl_person', 'person_id');
+
+		$this->_ci->MitarbeiterModel->db->where('public.tbl_benutzer.aktiv', true);
+
+		$this->_ci->MitarbeiterModel->db->group_start();
+		foreach ($query_words as $word)
+		{
+			$this->_ci->MitarbeiterModel->db->group_start();
+			$this->_ci->MitarbeiterModel->db->where('tbl_person.vorname ILIKE', "%" . $word . "%");
+			$this->_ci->MitarbeiterModel->db->or_where('tbl_person.nachname ILIKE', "%" . $word . "%");
+			$this->_ci->MitarbeiterModel->db->or_where('uid ILIKE', "%" . $word . "%");
+			$this->_ci->MitarbeiterModel->db->group_end();
+		}
+		$this->_ci->MitarbeiterModel->db->group_end();
+		$this->_ci->MitarbeiterModel->addOrder('nachname');
+		$this->_ci->MitarbeiterModel->addOrder('vorname');
+		$result = $this->_ci->MitarbeiterModel->load();
+		$this->terminateWithSuccess(hasData($result) ? getData($result) : array());
+	}
+
+}

application/controllers/api/frontend/v1/tempus/Tags.php

@@ -0,0 +1,53 @@
+<?php
+
+if (!defined('BASEPATH'))
+	exit('No direct script access allowed');
+
+class Tags extends Tag_Controller
+{
+	const BERECHTIGUNG_KURZBZ = ['admin:rw', 'assistenz:rw'];
+
+	public function __construct()
+	{
+		parent::__construct([
+			'getTag' => self::BERECHTIGUNG_KURZBZ,
+			'getTags' => self::BERECHTIGUNG_KURZBZ,
+			'getTagsByCalendar' => self::BERECHTIGUNG_KURZBZ,
+			'addTag' => self::BERECHTIGUNG_KURZBZ,
+			'updateTag' => self::BERECHTIGUNG_KURZBZ,
+			'doneTag' => self::BERECHTIGUNG_KURZBZ,
+			'deleteTag' => self::BERECHTIGUNG_KURZBZ
+		]);
+
+	$this->config->load('tempus');
+	}
+
+	public function getTag($readonly_tags = null)
+	{
+		parent::getTag($this->config->item('tempus_tags'));
+	}
+	public function getTags($tags = null)
+	{
+		parent::getTags($this->config->item('tempus_tags'));
+	}
+	public function getTagsByCalendar($eindeutige_kalender_gruppen_id = null)
+	{
+		parent::getTagsByAssignmentTypeValue('eindeutige_kalender_gruppen_id', $eindeutige_kalender_gruppen_id, $this->config->item('tempus_tags'));
+	}
+	public function addTag($withZuordnung = true, $updatable_tags = null)
+	{
+		parent::addTag(true, $this->config->item('tempus_tags'));
+	}
+	public function updateTag($updatable_tags = null)
+	{
+		parent::updateTag($this->config->item('tempus_tags'));
+	}
+	public function deleteTag($withZuordnung = true, $updatable_tags = null)
+	{
+		parent::deleteTag(true, $this->config->item('tempus_tags'));
+	}
+	public function doneTag($updatable_tags = null)
+	{
+		parent::doneTag($this->config->item('tempus_tags'));
+	}
+}

application/controllers/dashboard/Admin.php

@@ -0,0 +1,52 @@
+<?php
+/**
+ * Copyright (C) 2026 fhcomplete.org
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ */
+class Admin extends Auth_Controller
+{
+	/**
+	 * Constructor
+	 */
+	public function __construct()
+	{
+		// Set required permissions
+		parent::__construct(
+			array(
+				'index' => 'dashboard/admin:rw',
+				'preview' => 'dashboard/admin:r',
+			)
+		);
+	}
+
+	// -----------------------------------------------------------------------------------------------------------------
+	// Public methods
+	public function index()
+	{
+		$this->load->view('dashboard/admin.php', []);
+	}
+
+	public function preview($dashboard_kurzbz = 'CIS')
+	{
+		$this->load->view('dashboard/preview.php', [
+			'dashboard_kurzbz' => $dashboard_kurzbz
+		]);
+	}
+}

application/controllers/dashboard/Api.php

@@ -1,76 +0,0 @@
-<?php
-defined('BASEPATH') || exit('No direct script access allowed');
-
-class Api extends Auth_Controller
-{
-	public function __construct()
-	{
-		parent::__construct(
-			array(
-				'index'		=> 'dashboard/admin:rw',
-				'getNews'	=> 'dashboard/benutzer:r',
-                'getAmpeln'	=> 'dashboard/benutzer:r',
-			)
-		);
-
-		$this->load->library('AuthLib', null, 'AuthLib');
-
-		$this->_setAuthUID();
-	}
-
-	public function index()
-	{
-		echo 'Dashboard API Controller';
-	}
-
-	/**
-	 * Get News.
-	 */
-	public function getNews()
-	{
-		$limit =  $this->input->get('limit');
-
-		$this->load->model('content/News_model', 'NewsModel');
-
-		$result = $this->NewsModel->getAll($limit);
-
-		if (hasData($result))
-		{
-			$this->outputJson(getData($result), REST_Controller::HTTP_OK);
-		}
-		else
-		{
-			$this->terminateWithJsonError('fehler entdeckt');
-		}
-	}
-
-
-	/**
-	 * Get Ampeln.
-	 */
-	public function getAmpeln()
-	{
-
-		$this->load->model('content/Ampel_model', 'AmpelModel');
-		$result = $this->AmpelModel->getByUser($this->_uid);
-
-		if (hasData($result))
-		{
-			$this->outputJson(getData($result), REST_Controller::HTTP_OK);
-		}
-		else
-		{
-			$this->terminateWithJsonError('fehler entdeckt');
-		}
-	}
-
-	/**
-	 * Retrieve the UID of the logged user and checks if it is valid
-	 */
-	private function _setAuthUID()
-	{
-		$this->_uid = getAuthUID();
-
-		if (!$this->_uid) show_error('User authentification failed');
-	}
-}

application/controllers/dashboard/Config.php

@@ -1,216 +0,0 @@
-<?php
-defined('BASEPATH') || exit('No direct script access allowed');
-/**
- * Description of Config
- *
- * @author bambi
- */
-class Config extends Auth_Controller
-{
-	public function __construct()
-	{
-		parent::__construct(
-			array(
-				'index'							=> 'dashboard/benutzer:r',
-				'dummy'							=> 'dashboard/benutzer:r',
-				'genWidgetId'					=> 'dashboard/benutzer:rw',
-				'addWidgetsToPreset'			=> 'dashboard/admin:rw',
-				'removeWidgetFromPreset'		=> 'dashboard/admin:rw',
-				'addWidgetsToUserOverride'		=> 'dashboard/benutzer:rw',
-				'removeWidgetFromUserOverride'	=> 'dashboard/benutzer:rw',
-				'funktionen'					=> 'dashboard/admin:r',
-				'preset'						=> 'dashboard/admin:r',
-				'presetBatch'					=> 'dashboard/admin:r'
-			)
-		);
-		
-		$this->load->library('dashboard/DashboardLib', null, 'DashboardLib');
-		$this->load->library('AuthLib', null, 'AuthLib');
-		$this->load->model('ressource/Funktion_model', 'FunktionModel');
-	}
-	
-	public function index()
-	{
-		$dashboard_kurzbz = $this->input->get('db');
-		$uid = $this->AuthLib->getAuthObj()->username;
-
-		$dashboard = $this->DashboardLib->getDashboardByKurzbz($dashboard_kurzbz);
-		if(!$dashboard) {
-			http_response_code(404);
-			$this->terminateWithJsonError(array(
-				'error' => 'Dashboard ' . $dashboard_kurzbz . ' not found.'
-			));
-		}
-		
-		$mergedconfig = $this->DashboardLib->getMergedConfig($dashboard->dashboard_id, $uid);
-		$this->outputJsonSuccess($mergedconfig);
-	}
-	
-	public function genWidgetId()
-	{
-		$dashboard_kurzbz = $this->input->get('db');
-		$widgetid = $this->DashboardLib->generateWidgetId($dashboard_kurzbz);
-		$this->outputJsonSuccess(array(
-			'widgetid' => $widgetid
-		));
-	}
-	
-	public function addWidgetsToPreset()
-	{
-		$input = json_decode($this->input->raw_input_stream);
-		$dashboard_kurzbz = $input->db;
-		$funktion_kurzbz = $input->funktion_kurzbz;
-		
-		$preset = $this->DashboardLib->getPresetOrCreateEmptyPreset($dashboard_kurzbz, $funktion_kurzbz);
-		
-		$preset_decoded = json_decode($preset->preset, true);
-		
-		$this->DashboardLib->addWidgetsToWidgets($preset_decoded, $dashboard_kurzbz, $funktion_kurzbz, $input->widgets);
-		
-		$preset->preset = json_encode($preset_decoded);
-				
-		$result = $this->DashboardLib->insertOrUpdatePreset($preset);
-		if (isError($result)) {
-			http_response_code(500);
-			$this->terminateWithJsonError('preset could not be saved');
-		}
-		
-		$this->outputJsonSuccess(array('msg' => 'preset successfully stored.', 'data' => $preset_decoded));
-	}
-	
-	public function removeWidgetFromPreset()
-	{
-		$input = json_decode($this->input->raw_input_stream);
-		$dashboard_kurzbz = $input->db;
-		$funktion_kurzbz = $input->funktion_kurzbz;
-		$widgetid = $input->widgetid;
-				
-		$preset = $this->DashboardLib->getPreset($dashboard_kurzbz, $funktion_kurzbz);
-		if ($preset === null) {
-			http_response_code(404);
-			$this->terminateWithJsonError('preset for dashboard ' . $dashboard_kurzbz . ' and funktion ' . $funktion_kurzbz . ' not found.');
-		}
-		
-		$preset_decoded = json_decode($preset->preset, true);
-		if (!$this->DashboardLib->removeWidgetFromWidgets($preset_decoded, $funktion_kurzbz, $widgetid))
-		{
-			http_response_code(404);
-			$this->terminateWithJsonError('widgetid ' . $widgetid . ' not found');
-		}
-		
-		$preset->preset = json_encode($preset_decoded);
-		$result = $this->DashboardLib->insertOrUpdatePreset($preset);
-		if (isError($result))
-		{
-			http_response_code(500);
-			$this->terminateWithJsonError('failed to remove widget');
-		}
-		$this->outputJsonSuccess(array('msg' => 'preset successfully updated.'));
-	}
-
-	public function addWidgetsToUserOverride()
-	{
-		$input = json_decode($this->input->raw_input_stream);
-		$dashboard_kurzbz = $input->db;
-		$funktion_kurzbz = $input->funktion_kurzbz;
-		$uid = $this->AuthLib->getAuthObj()->username;
-		
-		$override = $this->DashboardLib->getOverrideOrCreateEmptyOverride($dashboard_kurzbz, $uid);
-		
-		$override_decoded = json_decode($override->override, true);
-
-		$this->DashboardLib->addWidgetsToWidgets($override_decoded, $dashboard_kurzbz, $funktion_kurzbz, $input->widgets);
-		
-		$override->override = json_encode($override_decoded);
-				
-		$result = $this->DashboardLib->insertOrUpdateOverride($override);
-		if (isError($result)) {
-			http_response_code(500);
-			$this->terminateWithJsonError('override could not be saved');
-		}
-		
-		$this->outputJsonSuccess(array('msg' => 'override successfully stored.', 'data' => $override_decoded));
-	}
-	
-	public function removeWidgetFromUserOverride()
-	{
-		$input = json_decode($this->input->raw_input_stream);
-		$dashboard_kurzbz = $input->db;
-		$funktion_kurzbz = $input->funktion_kurzbz;
-		$uid = $this->AuthLib->getAuthObj()->username;
-		$widgetid = $input->widgetid;
-		
-		$override = $this->DashboardLib->getOverride($dashboard_kurzbz, $uid);
-		if (empty($override)) {
-			http_response_code(404);
-			$this->terminateWithJsonError('userconfig for dashboard ' . $dashboard_kurzbz . ' not found.');
-		}
-		
-		$override_decoded = json_decode($override->override, true);
-		
-		if (!$this->DashboardLib->removeWidgetFromWidgets($override_decoded, $funktion_kurzbz, $widgetid))
-		{
-			http_response_code(404);
-			$this->terminateWithJsonError('widgetid ' . $widgetid . ' not found');
-		}
-		
-		$override->override = json_encode($override_decoded);
-		$result = $this->DashboardLib->insertOrUpdateOverride($override, $uid);
-		if (isError($result))
-		{
-			http_response_code(500);
-			$this->terminateWithJsonError('failed to remove widget');
-		}
-		$this->outputJsonSuccess(array('msg' => 'override successfully updated.'));
-	}
-	
-	public function funktionen()
-	{
-		$funktionen = $this->FunktionModel->load();
-
-		if (isError($funktionen)) {
-			http_response_code(404);
-			$this->terminateWithJsonError([
-				'error' => getError($funktionen)
-			]);
-		}
-		
-		return $this->outputJsonSuccess(getData($funktionen) ?: []);
-	}
-	
-	public function preset()
-	{
-		$db = $this->input->get('db');
-		$funktion = $this->input->get('funktion');
-
-		$conf = $this->DashboardLib->getPreset($db, $funktion);
-
-		if (!$conf)
-			return $this->outputJsonSuccess(['widgets' => [$funktion => []]]);
-
-		return $this->outputJsonSuccess(json_decode($conf->preset, true));
-	}
-	
-	public function presetBatch()
-	{
-		$db = $this->input->get('db');
-		$funktionen = $this->input->get('funktionen');
-		$result = [];
-
-		foreach ($funktionen as $funktion) {
-			$conf = $this->DashboardLib->getPreset($db, $funktion);
-			if ($conf)
-			{
-				$preset = json_decode($conf->preset, true);
-				if (!isset($preset[$funktion]) || !isset($preset[$funktion]['widgets']))
-					$result[$funktion] = [];
-				else
-					$result[$funktion] = $preset[$funktion]['widgets'];
-			}
-			else
-				$result[$funktion] = [];
-		}
-
-		return $this->outputJsonSuccess($result);
-	}
-}

application/controllers/dashboard/Dashboard.php

@@ -1,86 +0,0 @@
-<?php
-defined('BASEPATH') || exit('No direct script access allowed');
-/**
- * Description of Widget
- *
- * @author chris
- */
-class Dashboard extends Auth_Controller
-{
-	public function __construct()
-	{
-		parent::__construct(
-			array(
-				'index'							=> 'dashboard/admin:r',
-				'create'						=> 'dashboard/admin:rw',
-				'update'						=> 'dashboard/admin:rw',
-				'delete'						=> 'dashboard/admin:rw'
-			)
-		);
-		
-		$this->load->library('dashboard/DashboardLib', null, 'DashboardLib');
-		$this->load->model('dashboard/Dashboard_model', 'DashboardModel');
-	}
-	
-	public function index()
-	{
-		$result = $this->DashboardModel->load();
-
-		if (isError($result)) {
-			http_response_code(404);
-			$this->terminateWithJsonError([
-				'error' => getError($result)
-			]);
-		}
-		
-		return $this->outputJsonSuccess(getData($result) ?: []);
-	}
-	
-	public function create()
-	{
-		$input = $this->getPostJSON();
-
-		$result = $this->DashboardModel->insert($input);
-
-		if (isError($result)) {
-			http_response_code(404);
-			$this->terminateWithJsonError([
-				'error' => getError($result)
-			]);
-		}
-		
-		return $this->outputJsonSuccess(getData($result) ?: []);
-	}
-	
-	public function update()
-	{
-		$input = $this->getPostJSON();
-
-		$result = $this->DashboardModel->update($input->dashboard_id, $input);
-
-		if (isError($result)) {
-			http_response_code(404);
-			$this->terminateWithJsonError([
-				'error' => getError($result)
-			]);
-		}
-		
-		return $this->outputJsonSuccess(getData($result) ?: []);
-	}
-	
-	public function delete()
-	{
-		$input = $this->getPostJSON();
-
-		$result = $this->DashboardModel->delete($input->dashboard_id);
-
-		if (isError($result)) {
-			http_response_code(404);
-			$this->terminateWithJsonError([
-				'error' => getError($result)
-			]);
-		}
-		
-		return $this->outputJsonSuccess(getData($result) ?: []);
-	}
-}

application/controllers/dashboard/DashboardDemo.php

@@ -1,58 +0,0 @@
-<?php
-
-if (! defined('BASEPATH')) exit('No direct script access allowed');
-
-/**
- */
-class DashboardDemo extends Auth_Controller
-{
-    private $_uid;  // uid of the logged user
-
-    /**
-     * Constructor
-     */
-    public function __construct()
-    {
-        // Set required permissions
-        parent::__construct(
-            array(
-                'index' => 'dashboard/benutzer:r',
-                'admin' => 'dashboard/admin:rw'
-            )
-        );
-
-        $this->load->library('AuthLib');
-        $this->load->library('WidgetLib');
-
-        $this->_setAuthUID(); // sets property uid
-
-        $this->setControllerId(); // sets the controller id
-    }
-
-    // -----------------------------------------------------------------------------------------------------------------
-    // Public methods
-	public function index()
-	{
-		$this->load->view('dashboard/dashboard_demo.php', []);
-	}
-
-    // -----------------------------------------------------------------------------------------------------------------
-    // Public methods
-    public function admin()
-    {
-        $this->load->view('dashboard/dashboard_demo_admin.php', []);
-    }
-
-    // -----------------------------------------------------------------------------------------------------------------
-    // Private methods
-
-    /**
-     * Retrieve the UID of the logged user and checks if it is valid
-     */
-    private function _setAuthUID()
-    {
-        $this->_uid = getAuthUID();
-
-        if (!$this->_uid) show_error('User authentification failed');
-    }
-}

application/controllers/dashboard/Widget.php

@@ -1,134 +0,0 @@
-<?php
-defined('BASEPATH') || exit('No direct script access allowed');
-/**
- * Description of Widget
- *
- * @author chris
- */
-class Widget extends Auth_Controller
-{
-	public function __construct()
-	{
-		parent::__construct(
-			array(
-				'index'							=> ['dashboard/benutzer:r', 'dashboard/admin:r'],
-				'getAll'						=> 'dashboard/admin:r',
-				'getWidgetsForDashboard'		=> ['dashboard/benutzer:rw', 'dashboard/admin:r'],
-				'setAllowed'					=> 'dashboard/admin:rw'
-			)
-		);
-		
-		$this->load->library('dashboard/DashboardLib', null, 'DashboardLib');
-		$this->load->model('dashboard/Widget_model', 'WidgetModel');
-		$this->load->model('dashboard/Dashboard_Widget_model', 'DashboardWidgetModel');
-	}
-	
-	public function index()
-	{
-		$widget_id = $this->input->get('id');
-
-		$widget = $this->WidgetModel->load($widget_id);
-
-		if (isError($widget) || !getData($widget))
-			return $this->outputJsonSuccess([
-				"widget_id" => 0,
-				"widget_kurzbz" => "notfound",
-				"arguments" => [
-					"className" => 'alert-danger',
-					"title" => 'Widget Not Found',
-					"msg" => 'The widget with the id ' . $widget_id . ' could not be found'
-				],
-				"setup" => [
-					"name" => 'Widget Not Found',
-					"file" => absoluteJsImportUrl('public/js/components/DashboardWidget/Default.js'),
-					"width" => 1,
-					"height" => 1
-				]
-			]);
-
-		$widget = current(getData($widget));
-		$widget->arguments = json_decode($widget->arguments);
-		$tmpsetup = json_decode($widget->setup);
-		$tmpsetup->file = absoluteJsImportUrl($tmpsetup->file);
-		$widget->setup = $tmpsetup;
-
-		return $this->outputJsonSuccess($widget);
-	}
-	
-	public function getAll()
-	{
-		$dashboard_id = $this->input->get('dashboard_id');
-		$result = $this->WidgetModel->getWithAllowedForDashboard($dashboard_id);
-
-		if (isError($result))
-			return $this->outputJsonError(getError($result));
-
-		$tmpwidgets = getData($result) ?: [];
-		$widgets = array_map(function($widget) {
-			$widget->arguments = json_decode($widget->arguments);
-			$tmpsetup = json_decode($widget->setup);
-			$tmpsetup->file = absoluteJsImportUrl($tmpsetup->file);
-			$widget->setup = $tmpsetup;
-			return $widget;
-		}, $tmpwidgets);
-
-		$this->outputJsonSuccess($widgets);
-	}
-	
-	public function getWidgetsForDashboard()
-	{
-		$db = $this->input->get('db');
-		$result = $this->WidgetModel->getForDashboard($db);
-
-		if (isError($result)) {
-			http_response_code(404);
-			$this->terminateWithJsonError([
-				'error' => getError($result)
-			]);
-		}
-
-		$tmpwidgets = getData($result) ?: [];
-		$widgets = array_map(function($widget) {
-			$widget->arguments = json_decode($widget->arguments);
-			$tmpsetup = json_decode($widget->setup);
-			$tmpsetup->file = absoluteJsImportUrl($tmpsetup->file);
-			$widget->setup = $tmpsetup;
-			return $widget;
-		}, $tmpwidgets);
-
-		$this->outputJsonSuccess($widgets);
-	}
-	
-	public function setAllowed()
-	{
-		$input = $this->getPostJSON();
-
-		$dashboard_id = $input->dashboard_id;
-		$widget_id = $input->widget_id;
-		$action = $input->action;
-
-		if ($action == 'add') {
-			$result = $this->DashboardWidgetModel->insert([
-				'dashboard_id' => $dashboard_id,
-				'widget_id' => $widget_id
-			]);
-		} elseif ($action == 'delete') {
-			$result = $this->DashboardWidgetModel->delete([
-				'dashboard_id' => $dashboard_id,
-				'widget_id' => $widget_id
-			]);
-		} else {
-			http_response_code(404); // TODO(chris): 400?
-			$this->terminateWithJsonError([
-				'error' => 'action value invalid'
-			]);
-		}
-		if (isError($result)) {
-			http_response_code(404);
-			$this->terminateWithJsonError([
-				'error' => getError($result)
-			]);
-		}
-		return $this->outputJsonSuccess(getData($result));
-	}
-}

application/controllers/jobs/AbgabetoolJob.php

@@ -358,7 +358,8 @@ class AbgabetoolJob extends JOB_Controller
 		foreach($assistenzMap as $assistenz_person_id => $tupelArr) {
 
 			$abgabenString = '<div style="font-family: Arial, sans-serif; color: #333;">';
-
+			$hasContent = false;
+			
 			foreach($tupelArr as $tupel) {
 				$projektarbeit_id = $tupel[0];
 				$assistenzRow = $tupel[1];
@@ -377,6 +378,7 @@ class AbgabetoolJob extends JOB_Controller
 				if(count($relevantAbgaben) == 0) {
 					continue;
 				}
+				$hasContent = true;
 
 				// Format the Student Name
 				$s = $relevantAbgaben[0];
@@ -447,7 +449,12 @@ class AbgabetoolJob extends JOB_Controller
 			}
 
 			$abgabenString .= '</div>';
-
+			
+			// skip send entirely
+			if (!$hasContent) { 
+				continue;
+			}
+			
 			// done with building the change list, now send it
 			$assistenzRow = $tupelArr[0][1];
 			$anrede = $assistenzRow->anrede;

application/controllers/jobs/AntragJob.php

@@ -40,6 +40,13 @@ class AntragJob extends JOB_Controller
 	 */
 	public function sendStglSammelmail()
 	{
+
+		if ($this->config->item('abmeldung_enabled') !== true &&
+			$this->config->item('abmeldung_stg_enabled') !== true &&
+			$this->config->item('unterbrechung_enabled') !== true &&
+			$this->config->item('wiederholung_enabled') !== true)
+			return $this->logError('Konnte Job nicht starten: Keine der Configs "abmeldung_stg_enabled", "abmeldung_enabled", "unterbrechung_enabled",  "wiederholung_enabled" auf true gesetzt');
+
 		$this->load->model('person/Person_model', 'PersonModel');
 
 		$this->logInfo('Start Job sendStglSammelmail');
@@ -47,25 +54,38 @@ class AntragJob extends JOB_Controller
 		$this->load->model('organisation/Studiengang_model', 'StudiengangModel');
 
 		$this->StudierendenantragModel->addJoin('public.tbl_prestudent', 'prestudent_id');
-		$this->db->group_start();
-		$this->db->where('typ', Studierendenantrag_model::TYP_ABMELDUNG);
-		$this->db->where('campus.get_status_studierendenantrag(studierendenantrag_id)', Studierendenantragstatus_model::STATUS_CREATED);
-		$this->db->group_end();
 
-		$this->db->or_group_start();
-		$this->db->where('typ', Studierendenantrag_model::TYP_ABMELDUNG_STGL);
-		$this->db->where('campus.get_status_studierendenantrag(studierendenantrag_id)', Studierendenantragstatus_model::STATUS_CREATED);
-		$this->db->group_end();
+		if ($this->config->item('abmeldung_enabled') === true)
+		{
+			$this->db->group_start();
+			$this->db->where('typ', Studierendenantrag_model::TYP_ABMELDUNG);
+			$this->db->where('campus.get_status_studierendenantrag(studierendenantrag_id)', Studierendenantragstatus_model::STATUS_CREATED);
+			$this->db->group_end();
+		}
 
-		$this->db->or_group_start();
-		$this->db->where('typ', Studierendenantrag_model::TYP_UNTERBRECHUNG);
-		$this->db->where('campus.get_status_studierendenantrag(studierendenantrag_id)', Studierendenantragstatus_model::STATUS_CREATED);
-		$this->db->group_end();
+		if ($this->config->item('abmeldung_stg_enabled') === true)
+		{
+			$this->db->or_group_start();
+			$this->db->where('typ', Studierendenantrag_model::TYP_ABMELDUNG_STGL);
+			$this->db->where('campus.get_status_studierendenantrag(studierendenantrag_id)', Studierendenantragstatus_model::STATUS_CREATED);
+			$this->db->group_end();
+		}
 
-		$this->db->or_group_start();
-		$this->db->where('typ', Studierendenantrag_model::TYP_WIEDERHOLUNG);
-		$this->db->where('campus.get_status_studierendenantrag(studierendenantrag_id)', Studierendenantragstatus_model::STATUS_LVSASSIGNED);
-		$this->db->group_end();
+		if ($this->config->item('unterbrechung_enabled') === true)
+		{
+			$this->db->or_group_start();
+			$this->db->where('typ', Studierendenantrag_model::TYP_UNTERBRECHUNG);
+			$this->db->where('campus.get_status_studierendenantrag(studierendenantrag_id)', Studierendenantragstatus_model::STATUS_CREATED);
+			$this->db->group_end();
+		}
+
+		if ($this->config->item('wiederholung_enabled') === true)
+		{
+			$this->db->or_group_start();
+			$this->db->where('typ', Studierendenantrag_model::TYP_WIEDERHOLUNG);
+			$this->db->where('campus.get_status_studierendenantrag(studierendenantrag_id)', Studierendenantragstatus_model::STATUS_LVSASSIGNED);
+			$this->db->group_end();
+		}
 
 		$result =  $this->StudierendenantragModel->load();
 		if(isError($result))
@@ -206,6 +226,10 @@ class AntragJob extends JOB_Controller
 	public function sendReminderWiedereinstieg()
 	{
 		$now = new DateTime();
+
+		if ($this->config->item('unterbrechung_enabled') !== true)
+			return $this->logError('Konnte Job nicht starten: Config "unterbrechung_enabled" nicht auf true gesetzt');
+
 		$modifier = $this->config->item('unterbrechung_job_remind_wiedereinstieg_date_modifier');
 
 		if (!$modifier)
@@ -363,6 +387,13 @@ class AntragJob extends JOB_Controller
 	{
 		$this->logInfo('Start Job handleWiederholerDeadline');
 
+		if ($this->config->item('wiederholung_enabled') !== true)
+		{
+			$this->logError('Config "wiederholung_enabled" nicht auf true gesetzt');
+			$this->logInfo('Ende Job handleWiederholerDeadline');
+			return;
+		}
+
 		$this->load->library('PrestudentLib');
 
 		$insertvon = $this->config->item('antrag_job_systemuser');
@@ -481,6 +512,13 @@ class AntragJob extends JOB_Controller
 	{
 		$this->logInfo('Start Job handleAbmeldungenStglDeadline');
 
+		if ($this->config->item('abmeldung_stg_enabled') !== true)
+		{
+			$this->logError('Config "abmeldung_stg_enabled" nicht auf true gesetzt');
+			$this->logInfo('Ende Job handleAbmeldungenStglDeadline');
+			return;
+		}
+
 		$insertvon = $this->config->item('antrag_job_systemuser');
 		if (!$insertvon) {
 			$this->logError('Config "antrag_job_systemuser" nicht gesetzt');
@@ -614,6 +652,13 @@ class AntragJob extends JOB_Controller
 	{
 		$this->logInfo('Start Job sendAufforderungWiederholer');
 
+		if ($this->config->item('wiederholung_enabled') !== true)
+		{
+			$this->logError('Config "wiederholung_enabled" nicht auf true gesetzt');
+			$this->logInfo('Ende Job sendAufforderungWiederholer');
+			return;
+		}
+
 		$modifier_request_1 = $this->config->item('wiederholung_job_request_1_date_modifier');
 		$modifier_request_2 = $this->config->item('wiederholung_job_request_2_date_modifier');
 		$modifier_deadline = $this->config->item('wiederholung_job_deadline_date_modifier');

application/controllers/jobs/TempusJob.php

@@ -0,0 +1,27 @@
+<?php
+
+if (!defined("BASEPATH")) exit("No direct script access allowed");
+
+class TempusJob extends JOB_Controller
+{
+	private $_ci;
+
+	public function __construct()
+	{
+		parent::__construct();
+
+		$this->_ci =& get_instance();
+
+		$this->_ci->load->helper('hlp_sancho_helper');
+		$this->_ci->load->library('KalenderLib', ["uid" => null]);
+	}
+
+
+	public function sync()
+	{
+		$this->_ci->logInfo('Start job FHC-Core->Tempus->sync');
+		$this->_ci->kalenderlib->sync();
+		$this->_ci->logInfo('End job FHC-Core->Tempus->sync');
+	}
+
+}

application/controllers/lehre/Studierendenantrag.php

@@ -28,7 +28,9 @@ class Studierendenantrag extends FHC_Controller
 			'studierendenantrag'
 		]);
 
-        if (strtolower($this->router->method) === 'leitung')
+		$this->load->config('studierendenantrag');
+
+		if (strtolower($this->router->method) === 'leitung')
         	$this->_isAllowed([
         		'leitung' => ['student/studierendenantrag:r', 'student/antragfreigabe:r']
         	]);
@@ -54,18 +56,27 @@ class Studierendenantrag extends FHC_Controller
 					'bezeichnungStg' => $antrag->bezeichnung,
 					'bezeichnungOrgform' => $antrag->orgform
 				);
-				
-				$result = $this->antraglib->getPrestudentWiederholungsBerechtigt($antrag->prestudent_id);
-				if (getData($result) == 1)
-					$prestudentenArr[$antrag->prestudent_id]['allowedNewTypes'][] = 'Wiederholung';
 
-				$result = $this->antraglib->getPrestudentUnterbrechungsBerechtigt($antrag->prestudent_id);
-				if (getData($result) == 1)
-					$prestudentenArr[$antrag->prestudent_id]['allowedNewTypes'][] = 'Unterbrechung';
+				if ($this->config->item('wiederholung_enabled') === true)
+				{
+					$result = $this->antraglib->getPrestudentWiederholungsBerechtigt($antrag->prestudent_id);
+					if (getData($result) == 1)
+						$prestudentenArr[$antrag->prestudent_id]['allowedNewTypes'][] = 'Wiederholung';
+				}
 
-				$result = $this->antraglib->getPrestudentAbmeldeBerechtigt($antrag->prestudent_id);
-				if (getData($result) == 1)
-					$prestudentenArr[$antrag->prestudent_id]['allowedNewTypes'][] = 'Abmeldung';
+				if ($this->config->item('unterbrechung_enabled') === true)
+				{
+					$result = $this->antraglib->getPrestudentUnterbrechungsBerechtigt($antrag->prestudent_id);
+					if (getData($result) == 1)
+						$prestudentenArr[$antrag->prestudent_id]['allowedNewTypes'][] = 'Unterbrechung';
+				}
+
+				if ($this->config->item('abmeldung_enabled') === true)
+				{
+					$result = $this->antraglib->getPrestudentAbmeldeBerechtigt($antrag->prestudent_id);
+					if (getData($result) == 1)
+						$prestudentenArr[$antrag->prestudent_id]['allowedNewTypes'][] = 'Abmeldung';
+				}
 			}
 			if ($antrag->studierendenantrag_id == null)
 				continue;
@@ -88,45 +99,59 @@ class Studierendenantrag extends FHC_Controller
 
 		$this->load->view('lehre/Antrag/Leitung/List', [
 			'stgA' => $stgA,
-			'stgL' => $stgL
+			'stgL' => $stgL,
+			'abmeldung_enabled' => $this->config->item('abmeldung_stg_enabled')
 		]);
 	}
 
 	public function abmeldung($prestudent_id, $studierendenantrag_id = null)
 	{
-		$this->load->view('lehre/Antrag/Create', [
-			'prestudent_id' => $prestudent_id,
-			'studierendenantrag_id' => $studierendenantrag_id,
-			'antrag_type' => 'Abmeldung'
-		]);
+		if ($this->config->item('abmeldung_enabled') === true)
+		{
+			$this->load->view('lehre/Antrag/Create', [
+				'prestudent_id' => $prestudent_id,
+				'studierendenantrag_id' => $studierendenantrag_id,
+				'antrag_type' => 'Abmeldung'
+			]);
+		}
 	}
 
 	public function abmeldungstgl($prestudent_id, $studierendenantrag_id = null)
 	{
 
-		$this->load->view('lehre/Antrag/Create', [
-			'prestudent_id' => $prestudent_id,
-			'studierendenantrag_id' => $studierendenantrag_id,
-			'antrag_type' => 'AbmeldungStgl'
-		]);
+		if ($this->config->item('abmeldung_stg_enabled') === true)
+		{
+			$this->load->view('lehre/Antrag/Create', [
+				'prestudent_id' => $prestudent_id,
+				'studierendenantrag_id' => $studierendenantrag_id,
+				'antrag_type' => 'AbmeldungStgl'
+			]);
+		}
 	}
 
 	public function unterbrechung($prestudent_id, $studierendenantrag_id = null)
 	{
-		$this->load->view('lehre/Antrag/Create', [
-			'prestudent_id' => $prestudent_id,
-			'studierendenantrag_id' => $studierendenantrag_id,
-			'antrag_type' => 'Unterbrechung'
-		]);
+		if ($this->config->item('unterbrechung_enabled') === true)
+		{
+			$this->load->view('lehre/Antrag/Create', [
+				'prestudent_id' => $prestudent_id,
+				'studierendenantrag_id' => $studierendenantrag_id,
+				'antrag_type' => 'Unterbrechung'
+			]);
+		}
+
 	}
 
 	public function wiederholung($prestudent_id, $studierendenantrag_id = null)
 	{
-		$this->load->view('lehre/Antrag/Create', [
-			'prestudent_id' => $prestudent_id,
-			'studierendenantrag_id' => $studierendenantrag_id,
-			'antrag_type' => 'Wiederholung'
-		]);
+		if ($this->config->item('wiederholung_enabled') === true)
+		{
+			$this->load->view('lehre/Antrag/Create', [
+				'prestudent_id' => $prestudent_id,
+				'studierendenantrag_id' => $studierendenantrag_id,
+				'antrag_type' => 'Wiederholung'
+			]);
+		}
 	}
 
 	/**

application/controllers/system/MigrateKalender.php

@@ -0,0 +1,865 @@
+<?php
+/*
+ * Job zur einmaligen Migration des Stundenplans
+ *
+ * Aufruf
+ * php index.ci.php system/MigrateKalender
+ */
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+class MigrateKalender extends CLI_Controller
+{
+
+	/**
+	 * Constructor
+	 */
+	public function __construct()
+	{
+		parent::__construct();
+
+		$this->load->model('ressource/Kalender_model', 'KalenderModel');
+		$this->load->model('ressource/Kalender_Lehreinheit_model', 'KalenderLehreinheitModel');
+		$this->load->model('ressource/Kalender_Ort_model', 'KalenderOrtModel');
+		$this->load->model('ressource/Stundenplandev_Kalender_model', 'SyncModel');
+		$this->load->model('ressource/Reservierung_Kalender_model', 'SyncReservierungModel');
+		$this->load->model('ressource/Kalender_Event_Teilnehmer_model', 'KalenderEventTeilnehmerModel');
+		$this->load->model('ressource/Kalender_Event_model', 'KalenderEventModel');
+		$this->load->model('organisation/Studiensemester_model', 'StudiensemesterModel');
+		$this->load->model('person/Benutzer_model', 'BenutzerModel');
+	}
+
+	/**
+	 * Everything has a beginning
+	 */
+	public function refreshTablesAndFullMigrateOfStundenplanReservierung($von, $bis = null, $studiengang_kz = null, $ort_kurzbz = null)
+	{
+		echo "Refreshing calendar related tables...\n";
+		$this->resetBeforeNewStundenplanReservierungImport();
+		echo "Calendar related tables refreshed successfully.\n\n";
+
+		echo "Starting full migration of Stundenplan and Reservierung from $von to " . ($bis ?? '2100-12-31') . "...\n";
+		$this->fullMigrateOfStundenplanReservierung($von, $bis, $studiengang_kz, $ort_kurzbz);
+		echo "Full migration of Stundenplan and Reservierung completed successfully.\n";
+	}
+
+	public function fullMigrateOfStundenplanReservierung($von, $bis = null, $studiengang_kz = null, $ort_kurzbz = null)
+	{
+		echo "Starting migration of Stundenplan from $von to " . ($bis ?? '2100-12-31') . "...\n";
+		$this->migrateStundenplan($von, $bis, $studiengang_kz);
+		echo "Stundenplan migration completed successfully.\n\n";
+
+		echo "Starting migration of Reservierung from $von to " . ($bis ?? '2100-12-31') . "...\n";
+		$this->migrateReservierung($von, $bis, $ort_kurzbz);
+		echo "Reservierung migration completed successfully.\n\n";
+
+		echo "Starting migration of Stundenplan Betriebsmittel entries...\n";
+		$this->migrateStundenplanBetriebsmittelEntries();
+		echo "Stundenplan Betriebsmittel entries migration completed successfully.\n\n";
+
+		echo "Starting to add title values as tags to calendar entries...\n";
+		$this->addTitleValuesAsTagsToKalenderEntries();
+		echo "Adding title values as tags to calendar entries completed successfully.\n\n";
+	}
+
+	public function migrateStundenplan($von, $bis = null, $studiengang_kz = null)
+	{
+		if (is_null($von))
+			return error('Parameter "von" ist erforderlich');
+
+		if (is_null($bis))
+			$bis = '2100-12-31';
+
+		$db = new DB_Model();
+
+		$stpldevsql = '
+			WITH eindeutige_stunden AS (
+				SELECT DISTINCT unr, datum, stunde
+				FROM lehre.tbl_stundenplandev
+				WHERE datum >= ? AND datum <= ?';
+
+		$params = [$von, $bis];
+
+		if (!is_null($studiengang_kz))
+		{
+			$stpldevsql .= ' AND studiengang_kz = ?';
+
+			$params[] = $studiengang_kz;
+		}
+
+		$stpldevsql .= '),
+			
+			block_keys AS (
+				SELECT
+					unr,
+					datum,
+					stunde,
+					stunde - ROW_NUMBER() OVER (PARTITION BY unr, datum ORDER BY stunde) AS block_nr
+				FROM eindeutige_stunden
+			),
+			blocks AS (
+				SELECT
+					bk.unr,
+					bk.datum,
+					bk.block_nr,
+					MIN(bk.stunde) AS stunde_von,
+					MAX(bk.stunde) AS stunde_bis,
+					array_agg(DISTINCT sp.lehreinheit_id) AS lehreinheit_id,
+					array_agg(DISTINCT sp.ort_kurzbz) AS ort_kurzbz,
+					array_agg(sp.stundenplandev_id ORDER BY bk.stunde) AS stundenplandev_ids,
+					MIN(sp.insertamum) AS insertamum,
+					(array_agg(sp.insertvon ORDER BY sp.insertamum ASC))[1] AS insertvon,
+					MAX(sp.updateamum) AS updateamum,
+					(array_agg(sp.updatevon ORDER BY sp.updateamum DESC))[1] AS updatevon
+				FROM block_keys bk JOIN lehre.tbl_stundenplandev sp ON sp.unr = bk.unr AND sp.datum = bk.datum AND sp.stunde = bk.stunde
+				WHERE sp.datum >= ? AND sp.datum <= ?
+				GROUP BY bk.unr, bk.datum, bk.block_nr
+			)
+			SELECT
+				b.stundenplandev_ids,
+				b.unr,
+				b.datum,
+				b.block_nr,
+				b.lehreinheit_id,
+				b.ort_kurzbz,
+				b.datum + stundevon.beginn AS von,
+				b.datum + stundebis.ende AS bis,
+				b.insertamum,
+				b.insertvon,
+				b.updateamum,
+				b.updatevon
+			FROM blocks b
+				JOIN lehre.tbl_stunde stundevon ON stundevon.stunde = b.stunde_von
+				JOIN lehre.tbl_stunde stundebis ON stundebis.stunde = b.stunde_bis
+			ORDER BY b.datum, b.unr, b.block_nr;';
+
+		array_push($params, $von, $bis);
+		$stpldev = $db->execReadOnlyQuery($stpldevsql, $params);
+
+		if (hasData($stpldev))
+		{
+			// Pruefen ob der Eintrag schon in Sync Tabelle vorhanden ist
+			// Wenn neuere Änderungen vorhanden dann Update
+			// Wenn keine Änderungen seit leztem Sync dann Ueberspringen
+			// Wenn noch nicht vorhanden neu anlegen
+			// Danach ggf pruefen welceh Eintraege in der zwischenzeit geloescht wurden und
+			// in der neuen Tabelle auch archivieren oder loeschen
+
+			$data = getData($stpldev);
+			foreach($data as $block)
+			{
+				$ids = is_array($block->stundenplandev_ids) ? $block->stundenplandev_ids : explode(',', $block->stundenplandev_ids);
+				/*$ids = array_map('intval', $ids);*/
+
+				$this->SyncModel->db->where_in('stundenplandev_id', $ids);
+				$sync_result = $this->SyncModel->load();
+
+				if (!hasData($sync_result))
+				{
+					$kalender_id = $this->_insertKalender($block, 'lehreinheit');
+					if ($kalender_id)
+					{
+						$this->_insertSync($block->stundenplandev_ids, $kalender_id);
+					}
+				}
+				else
+				{
+					$syncData = getData($sync_result);
+					$kalender_id = $syncData[0]->kalender_id;
+					$last_sync = $syncData[0]->lastupdate;
+					$synced_ids = array_column($syncData, 'stundenplandev_id');
+
+					if ($block->updateamum > $last_sync)
+					{
+						$this->_updateKalender($kalender_id, $block);
+						$this->_updateSync($synced_ids, $kalender_id);
+					}
+
+					$fehlende = array_diff($block->stundenplandev_ids, $synced_ids);
+					if (!empty($fehlende))
+					{
+						$this->_insertSync($fehlende, $kalender_id);
+					}
+				}
+			}
+		}
+	}
+
+	public function migrateReservierung($von, $bis = null, $ort_kurzbz = null)
+	{
+		if (is_null($von))
+			return error('Parameter "von" ist erforderlich');
+
+		if (is_null($bis))
+			$bis = '2100-12-31';
+
+		$db = new DB_Model();
+
+		$qry = "WITH eindeutige_stunden AS (
+					SELECT DISTINCT titel, beschreibung, datum, stunde
+					FROM campus.tbl_reservierung
+					WHERE datum >= ? AND datum <= ?";
+
+		$params = array($von, $bis);
+
+		if (!is_null($ort_kurzbz))
+		{
+			$qry .= " AND ort_kurzbz = ?";
+			$params[] = $ort_kurzbz;
+		}
+
+		$qry .=	"),
+					block_keys AS (
+						SELECT
+							titel, beschreibung, datum, stunde,
+							stunde - ROW_NUMBER() OVER (PARTITION BY titel, beschreibung, datum ORDER BY stunde) AS block_nr
+						FROM eindeutige_stunden
+					),
+					blocks AS (
+						 SELECT
+							bk.titel,
+							bk.beschreibung,
+							bk.datum,
+							bk.block_nr,
+							MIN(bk.stunde) AS stunde_von,
+							MAX(bk.stunde) AS stunde_bis,
+							array_agg(DISTINCT r.reservierung_id::text) AS reservierung_ids,
+							array_agg(DISTINCT r.uid) AS uids,
+							array_agg(DISTINCT r.gruppe_kurzbz) AS gruppen_kurzbz,
+							array_agg(DISTINCT ROW(r.semester, r.verband, r.gruppe, r.studiengang_kz)::text) AS svg_kombis,
+							array_agg(DISTINCT r.ort_kurzbz) AS ort_kurzbz,
+							MIN(r.studiengang_kz) AS studiengang_kz,
+							MIN(r.reservierung_id) AS reservierung_id,
+							MAX(r.insertamum) AS insertamum,
+							(array_agg(r.insertvon ORDER BY r.insertamum ASC))[1] AS insertvon
+						FROM block_keys bk
+							JOIN campus.tbl_reservierung r
+									ON r.titel = bk.titel AND r.beschreibung = bk.beschreibung AND r.datum = bk.datum AND r.stunde = bk.stunde
+						WHERE r.datum >= ? AND r.datum <= ?
+						GROUP BY bk.titel, bk.beschreibung, bk.datum, bk.block_nr
+					)
+				SELECT
+					b.*,
+					(b.datum + s_von.beginn) AS von,
+					(b.datum + s_bis.ende) AS bis
+				FROM blocks b
+						JOIN lehre.tbl_stunde s_von ON s_von.stunde = b.stunde_von
+						JOIN lehre.tbl_stunde s_bis ON s_bis.stunde = b.stunde_bis
+				ORDER BY b.reservierung_id DESC;";
+
+		array_push($params, $von, $bis);
+		$reservierung_data = $db->execReadOnlyQuery($qry, $params);
+
+
+		if (hasData($reservierung_data))
+		{
+			$data = getData($reservierung_data);
+
+			foreach($data as $block)
+			{
+
+				$ids = is_array($block->reservierung_ids) ? $block->reservierung_ids : explode(',', $block->reservierung_ids);
+
+				$this->SyncReservierungModel->db->where_in('reservierung_id', $ids);
+				$sync_result = $this->SyncReservierungModel->load();
+
+				if (!hasData($sync_result))
+				{
+					$kalender_id = $this->_insertKalender($block, 'reservierung');
+					if ($kalender_id)
+					{
+						$this->_insertReservierungSync($block->reservierung_ids, $kalender_id);
+					}
+				}
+				else
+				{
+					$syncData = getData($sync_result);
+					$kalender_id = $syncData[0]->kalender_id;
+					$last_sync = $syncData[0]->lastupdate;
+					$synced_ids = array_column($syncData, 'reservierung_id');
+
+					if ($block->insertamum > $last_sync)
+					{
+						$this->_updateKalender($kalender_id, $block);
+						$this->_updateReservierungSync($synced_ids, $kalender_id);
+					}
+
+					$fehlende = array_diff($block->reservierung_ids, $synced_ids);
+					if (!empty($fehlende))
+					{
+						$this->_insertReservierungSync($fehlende, $kalender_id);
+					}
+				}
+			}
+		}
+	}
+
+	/**
+	 * Removes calendar entries created by the Stundenplan and Reservierung migrations,
+	 * so that both imports can be started from scratch.
+	 */
+	public function resetBeforeNewStundenplanReservierungImport()
+	{
+		
+		$db = new DB_Model();
+
+		$db->db->trans_start();
+
+		$db->db->query('DELETE FROM sync.tbl_stundenplandev_kalender');
+		$db->db->query('DELETE FROM sync.tbl_reservierung_kalender');
+
+		$db->db->query("DELETE FROM lehre.tbl_kalender_event_teilnehmer
+			WHERE kalender_id IN (
+				SELECT kalender_id
+				FROM lehre.tbl_kalender
+				WHERE typ = 'reservierung'
+			)");
+
+		$db->db->query("DELETE FROM lehre.tbl_kalender_event
+			WHERE kalender_id IN (
+				SELECT kalender_id
+				FROM lehre.tbl_kalender
+				WHERE typ = 'reservierung'
+			)");
+
+		$db->db->query("DELETE FROM lehre.tbl_kalender_lehreinheit
+			WHERE kalender_id IN (
+				SELECT kalender_id
+				FROM lehre.tbl_kalender
+				WHERE typ = 'lehreinheit' OR typ = 'reservierung'
+			)");
+
+		$db->db->query("DELETE FROM lehre.tbl_kalender_ort
+			WHERE kalender_id IN (
+				SELECT kalender_id
+				FROM lehre.tbl_kalender
+				WHERE typ IN ('lehreinheit', 'reservierung')
+			)");
+
+		$db->db->query("DELETE FROM public.tbl_notiz
+			WHERE notiz_id IN (
+				SELECT notiz_id
+				FROM public.tbl_notizzuordnung
+				WHERE eindeutige_kalender_gruppen_id IN (
+					SELECT eindeutige_kalender_gruppen_id
+					FROM lehre.tbl_kalender
+				)
+			)");
+
+		$db->db->query("DELETE FROM public.tbl_notizzuordnung
+			WHERE eindeutige_kalender_gruppen_id IN (
+				SELECT eindeutige_kalender_gruppen_id
+				FROM lehre.tbl_kalender
+			)");
+		
+		$db->db->query("DELETE FROM public.tbl_betriebsmittel_kalender
+			WHERE eindeutige_kalender_gruppen_id IN (
+				SELECT eindeutige_kalender_gruppen_id
+				FROM lehre.tbl_kalender
+			)");
+
+		$db->db->query("DELETE FROM lehre.tbl_kalender
+			WHERE typ IN ('lehreinheit', 'reservierung')");
+
+		$db->db->trans_complete();
+
+		if ($db->db->trans_status() === false)
+			return error('Reset before new import failed');
+
+		return success('Migration data reset successfully');
+	}
+
+	public function migrateStundenplanBetriebsmittelEntries() {
+		$this->setKalendarEntriesGroupIDs();
+		$this->setKalendarEntriesGroupIDsForChildren();
+
+		$dbModel = new DB_Model();
+
+		$deleteOldImportedTempusEntriesQuery = "DELETE from lehre.tbl_betriebsmittel_kalender WHERE quelle != 'tempus_neu' OR quelle IS NULL;";
+		$createHelperTypeQuery = "DO $$
+			BEGIN
+				IF NOT EXISTS (
+					SELECT 1
+					FROM pg_type
+					WHERE typname = 'betriebsmittel_info'
+				) THEN
+					CREATE TYPE betriebsmittel_info AS (
+						betriebsmittel_id bigint,
+						insertamum timestamp,
+						insertvon text
+					);
+				END IF;
+			END $$;";
+		
+		$query = $deleteOldImportedTempusEntriesQuery . 
+				 $createHelperTypeQuery .
+		"WITH test AS (
+			SELECT 
+				tk.eindeutige_kalender_gruppen_id AS eindeutige_kalender_gruppen_id,
+				array_agg(tk.kalender_id),
+				array_agg(
+					ROW(tsb.betriebsmittel_id, tsb.insertamum, tsb.insertvon)::betriebsmittel_info
+				) AS betriebsmittel_data
+			FROM sync.tbl_stundenplandev_kalender AS sk
+			JOIN lehre.tbl_kalender tk ON tk.kalender_id = sk.kalender_id
+			JOIN lehre.tbl_stundenplan_betriebsmittel tsb ON tsb.stundenplandev_id = sk.stundenplandev_id 
+			GROUP BY tk.eindeutige_kalender_gruppen_id 
+			)
+			INSERT INTO lehre.tbl_betriebsmittel_kalender (
+				eindeutige_kalender_gruppen_id, 
+				betriebsmittel_id,
+				insertamum,
+				insertvon
+				)
+			SELECT
+				t.eindeutige_kalender_gruppen_id,
+				bm.betriebsmittel_id,
+				bm.insertamum,
+				bm.insertvon
+			FROM test t
+			CROSS JOIN LATERAL unnest(t.betriebsmittel_data) AS bm
+			ON CONFLICT (eindeutige_kalender_gruppen_id, betriebsmittel_id) DO NOTHING;
+			;";
+
+		$dbModel->db->query($query);
+	}
+
+	public function addTitleValuesAsTagsToKalenderEntries() {
+		$dbModel = new DB_Model();
+
+		
+		$query = "SELECT 
+				k.eindeutige_kalender_gruppen_id,
+				ARRAY_AGG(DISTINCT(spd.titel) ORDER BY spd.titel) AS titel,
+				MAX(spd.updateamum) AS updateamum
+			FROM lehre.tbl_stundenplandev spd
+			JOIN sync.tbl_stundenplandev_kalender spdk ON spd.stundenplandev_id = spdk.stundenplandev_id
+			JOIN lehre.tbl_kalender k ON k.kalender_id = spdk.kalender_id
+			WHERE k.typ = 'lehreinheit' AND k.eindeutige_kalender_gruppen_id IS NOT NULL AND spd.titel IS NOT NULL
+			GROUP BY k.eindeutige_kalender_gruppen_id";
+
+		$result = $dbModel->execReadOnlyQuery($query);
+
+		if (isError($result)) {
+			error("Error while fetching title values for adding as tags: " . getError($result));
+			return;
+		}
+		if (!hasData($result)) {
+			error("No title values found for adding as tags.");
+			return;
+		}
+
+		$data = getData($result);
+
+		foreach($data as $block) {
+			$eindeutige_kalender_gruppen_id = $block->eindeutige_kalender_gruppen_id;
+			$notizText = implode(' - ', array_filter($block->titel, function($titel) {
+				return !empty(trim($titel));
+			}));
+
+			if (!empty($notizText)) {
+				$this->addTag($eindeutige_kalender_gruppen_id, $notizText, $block->updateamum);
+			}
+		}
+	}
+
+	private function setKalendarEntriesGroupIDs() {
+		$dbModel = new DB_Model();
+
+		$query = "UPDATE lehre.tbl_kalender
+			SET eindeutige_kalender_gruppen_id = gen_random_uuid()
+			WHERE vorgaenger_kalender_id IS NULL
+			AND eindeutige_kalender_gruppen_id IS NULL;";
+
+		$dbModel->db->query($query);
+
+	}
+
+	private function setKalendarEntriesGroupIDsForChildren() {
+		$dbModel = new DB_Model();
+
+		$query = "WITH RECURSIVE tree AS 
+			(
+				SELECT
+					kalender_id,
+					vorgaenger_kalender_id,
+					kalender_id AS root_id,
+					eindeutige_kalender_gruppen_id as root_eindeutige_kalender_gruppen_id
+				FROM lehre.tbl_kalender
+				WHERE vorgaenger_kalender_id IS NULL
+
+				UNION ALL
+
+				SELECT
+					i.kalender_id,
+					i.vorgaenger_kalender_id,
+					t.root_id,
+					t.root_eindeutige_kalender_gruppen_id 
+				FROM lehre.tbl_kalender i
+				JOIN tree t
+				ON i.vorgaenger_kalender_id = t.kalender_id
+				where i.eindeutige_kalender_gruppen_id is NULL
+			
+			)
+			UPDATE lehre.tbl_kalender k
+			SET eindeutige_kalender_gruppen_id = t.root_eindeutige_kalender_gruppen_id
+			FROM tree t
+			WHERE k.kalender_id = t.kalender_id
+			AND k.eindeutige_kalender_gruppen_id IS NULL;";
+
+		$dbModel->db->query($query);
+	}
+	
+	private function _insertKalender($block, $typ)
+	{
+		$result = $this->KalenderModel->insert(
+			array (
+				'von' => $block->von,
+				'bis' => $block->bis,
+				'typ' => $typ,
+				'status_kurzbz'=> 'live',
+				'insertamum' => $block->insertamum,
+				'insertvon' => $block->insertvon,
+				'updateamum' => $block->updateamum ?? null,
+				'updatevon' => $block->updatevon ?? null
+			)
+		);
+		if(!isSuccess($result))
+			return null;
+
+		$kalender_id = getData($result);
+
+		if ($typ === 'lehreinheit')
+		{
+			$lehreinheit_ids = is_array($block->lehreinheit_id) ? $block->lehreinheit_id : explode(',', $block->lehreinheit_id);
+			foreach ($lehreinheit_ids as $lehreinheit_id)
+			{
+				$leResult = $this->KalenderLehreinheitModel->insert(
+					array (
+						'kalender_id' => $kalender_id,
+						'lehreinheit_id'=> $lehreinheit_id
+					)
+				);
+
+				if (!isSuccess($leResult))
+					return null;
+			}
+		}
+		else if ($typ === 'reservierung')
+		{
+			$eventResult = $this->KalenderEventModel->insert(array(
+				'kalender_id' => $kalender_id,
+				'titel' => $block->titel,
+				'beschreibung' => $block->beschreibung
+			));
+
+			if (!isSuccess($eventResult))
+				return null;
+
+			if ($block->insertvon)
+			{
+				$user = $this->BenutzerModel->load(array('uid' => $block->insertvon));
+
+				if (hasData($user))
+				{
+					$this->KalenderEventTeilnehmerModel->insert(array(
+						'kalender_id' => $kalender_id,
+						'uid' => getData($user)[0]->uid,
+						'rolle_kurzbz' => 'organisator'
+					));
+				}
+			}
+
+			$uids = is_array($block->uids) ? $block->uids : explode(',', $block->uids);
+			foreach ($uids as $uid)
+			{
+				$this->KalenderEventTeilnehmerModel->insert(array(
+					'kalender_id' => $kalender_id,
+					'uid' => $uid,
+					'rolle_kurzbz' => 'teilnehmer'
+				));
+			}
+
+			$semester_range = $this->StudiensemesterModel->getByDateRange($block->von, $block->bis);
+
+			if (isError($semester_range))
+				return null;
+
+			$studiensemester_kurzbz = getData($semester_range)[0]->studiensemester_kurzbz ?? null;
+
+			$gruppen = is_array($block->gruppen_kurzbz) ? $block->gruppen_kurzbz : explode(',', $block->gruppen_kurzbz ?? '');
+
+			foreach ($gruppen as $gruppe_kurzbz)
+			{
+				$gruppe_kurzbz = trim($gruppe_kurzbz);
+				if (!empty($gruppe_kurzbz))
+				{
+					$this->KalenderEventTeilnehmerModel->insert(array(
+						'kalender_id' => $kalender_id,
+						'gruppe_kurzbz' => $gruppe_kurzbz,
+						'studiengang_kz' => $block->studiengang_kz,
+						'studiensemester_kurzbz' => $studiensemester_kurzbz,
+						'rolle_kurzbz' => 'teilnehmer'
+					));
+				}
+			}
+
+			foreach ($block->svg_kombis as $kombi_str)
+			{
+				$kombi_str = trim($kombi_str, '()');
+				list($sem, $verb, $grp, $stg_kz) = explode(',', $kombi_str);
+
+				$sem = trim($sem) === '' ? null : trim($sem);
+				$verb = trim($verb) === '' ? null : trim($verb);
+				$grp = trim($grp) === '' ? null : trim($grp);
+				$stg_kz = trim($stg_kz) === '' ? null : trim($stg_kz);
+
+				if (is_null($sem) && is_null($verb) && is_null($grp) && is_null($stg_kz))
+					continue;
+
+				$this->KalenderEventTeilnehmerModel->insert(array(
+					'kalender_id' => $kalender_id,
+					'studiengang_kz' => $stg_kz,
+					'semester' => $sem,
+					'verband' => $verb,
+					'gruppe' => $grp,
+					'studiensemester_kurzbz' => $studiensemester_kurzbz,
+					'rolle_kurzbz' => 'teilnehmer'
+				));
+			}
+		}
+
+		$orte = is_array($block->ort_kurzbz) ? $block->ort_kurzbz : explode(',', $block->ort_kurzbz ?? '');
+
+		foreach ($orte as $ort)
+		{
+			$ort = trim($ort);
+			if (!empty($ort))
+			{
+				$this->KalenderOrtModel->insert(
+					array (
+						'kalender_id' => $kalender_id,
+						'ort_kurzbz' => $ort
+					)
+				);
+			}
+		}
+
+		return $kalender_id;
+	}
+
+	private function _insertSync($ids, $kalender_id)
+	{
+		foreach($ids as $id)
+		{
+			$this->SyncModel->insert(
+				array (
+					'stundenplandev_id' => $id,
+					'kalender_id' => $kalender_id,
+					'lastupdate' => date('Y-m-d H:i:s')
+				)
+			);
+		}
+	}
+	private function _insertReservierungSync($ids, $kalender_id)
+	{
+
+		foreach($ids as $id)
+		{
+			$this->SyncReservierungModel->insert(
+				array (
+					'reservierung_id' => $id,
+					'kalender_id' => $kalender_id,
+					'lastupdate' => date('Y-m-d H:i:s')
+				)
+			);
+		}
+	}
+
+	private function _updateKalender($kalender_id, $block)
+	{
+		$this->KalenderModel->update(
+			array (
+				'kalender_id' => $kalender_id
+			),
+			array (
+				'von' => $block->von,
+				'bis' => $block->bis,
+				'updateamum'=> $block->updateamum,
+				'updatevon' => $block->updatevon
+			)
+		);
+
+		$orte = is_array($block->ort_kurzbz) ? $block->ort_kurzbz : explode(',', $block->ort_kurzbz ?? '');
+		$orte = array_filter(array_map('trim', $orte));
+
+		$this->KalenderOrtModel->delete(array('kalender_id' => $kalender_id));
+
+		foreach ($orte as $ort)
+		{
+			$this->KalenderOrtModel->insert(
+				array (
+					'kalender_id' => $kalender_id,
+					'ort_kurzbz' => $ort
+				)
+			);
+		}
+	}
+
+	private function _updateSync($ids, $kalender_id)
+	{
+		foreach($ids as $id)
+		{
+			$this->SyncModel->update(
+				array (
+					'stundenplandev_id' => $id,
+					'kalender_id' => $kalender_id
+				),
+				array (
+					'lastupdate' => date('Y-m-d H:i:s')
+				)
+			);
+		}
+	}
+
+	private function _updateReservierungSync($ids, $kalender_id)
+	{
+		foreach($ids as $id)
+		{
+			$this->SyncReservierungModel->update(
+				array (
+					'reservierung_id' => $id,
+					'kalender_id' => $kalender_id
+				),
+				array (
+					'lastupdate' => date('Y-m-d H:i:s')
+				)
+			);
+		}
+	}
+
+	private function addTag($eindeutige_kalender_gruppen_id, $notizText, $lastUpdatedInOldSystem): bool
+	{
+		$notizType = 'hinweis';
+		$insertvonMockUser = 'oldToNewTempusMigration';
+		
+		if (is_null($eindeutige_kalender_gruppen_id) || empty($eindeutige_kalender_gruppen_id)) {
+			var_dump("Error: eindeutige_kalender_gruppen_id is null or empty.");
+			return false;
+		}
+
+		$this->load->model('person/Notiz_model', 'NotizModel');
+		$this->load->model('system/Notiztyp_model', 'NotiztypModel');
+		$this->load->model('person/Notizzuordnung_model', 'NotizzuordnungModel');
+
+		$checkTyp = $this->NotiztypModel->loadWhere(array('typ_kurzbz' => $notizType));
+
+		if (isError($checkTyp))
+		{
+			error("Error occurred while checking Notiztyp: " . $checkTyp->message);
+			return false;
+		}
+
+		if (!hasData($checkTyp))
+		{
+			error("Notiztyp 'hinweis' does not exist. Please create it before adding tags.");
+			return false;
+		}
+		 
+
+		$this->NotizzuordnungModel->addJoin('tbl_notiz', 'tbl_notiz.notiz_id = tbl_notizzuordnung.notiz_id', 'LEFT');
+		$this->NotizzuordnungModel->db->where('tbl_notiz.typ', $notizType);
+		$this->NotizzuordnungModel->db->where('tbl_notiz.insertvon', $insertvonMockUser);
+		$oldNotizZuordnung = $this->NotizzuordnungModel->loadWhere(array('eindeutige_kalender_gruppen_id' => $eindeutige_kalender_gruppen_id));
+		if (isError($oldNotizZuordnung))
+		{
+			error("Error occurred while checking Notizzuordnung: " . $oldNotizZuordnung->message);
+			return false;
+		}
+		if (hasData($oldNotizZuordnung))
+		{
+			return $this->updateTag($eindeutige_kalender_gruppen_id, $notizText, $lastUpdatedInOldSystem);
+		}
+
+		
+		$insertResult = $this->NotizModel->insert(array(
+			'titel' => 'TAG',
+			'text' => $notizText,
+			'verfasser_uid' => null,
+			'erledigt' => false,
+			'insertamum' => date('Y-m-d H:i:s'),
+			'insertvon' => $insertvonMockUser,
+			'typ' => $notizType
+		));
+
+		if (isError($insertResult))
+		{
+			error("Error occurred while inserting Notiz: " . $insertResult->message);
+			return false;
+		}
+
+		$insertZuordnung = $this->NotizzuordnungModel->insert(array(
+			'notiz_id' => $insertResult->retval,
+			'eindeutige_kalender_gruppen_id' => $eindeutige_kalender_gruppen_id
+		));
+
+		if (isError($insertZuordnung)) 
+		{
+			error("Error occurred while inserting Notizzuordnung: " . $insertZuordnung->message);
+			return false;
+		}
+
+		return true;
+	}
+
+	private function updateTag($eindeutige_kalender_gruppen_id, $notizText, $lastUpdatedInOldSystem)
+	{
+		$notizType = 'hinweis';
+		$insertvonMockUser = 'oldToNewTempusMigration';
+		
+		$this->NotizzuordnungModel->addJoin('tbl_notiz', 'tbl_notiz.notiz_id = tbl_notizzuordnung.notiz_id', 'LEFT');
+		$this->NotizzuordnungModel->db->where('tbl_notiz.typ', $notizType);
+		$this->NotizzuordnungModel->db->where('tbl_notiz.insertvon', $insertvonMockUser);
+		$notizZuordnungRes = $this->NotizzuordnungModel->loadWhere(array('eindeutige_kalender_gruppen_id' => $eindeutige_kalender_gruppen_id));
+		if (isError($notizZuordnungRes))
+		{
+			error("Error occurred while loading Notizzuordnung: " . $notizZuordnungRes->message);
+			return false;
+		}
+
+
+		$tag = $this->NotizModel->loadWhere(array('notiz_id' => $notizZuordnungRes->retval[0]->notiz_id));
+		if (isError($tag))
+		{
+			error("Error occurred while loading Notiz: " . $tag->message);
+			return false;
+		}
+
+		if (!hasData($tag))
+		{
+			error("Error occurred while loading Notiz: " . $tag->message);
+			return false;
+		}
+
+		$adjustedLastUpdatedInOldSystem = date('Y-m-d H:i:s', strtotime($lastUpdatedInOldSystem) + 5);
+		if ($tag->retval[0]->updateamum >= $adjustedLastUpdatedInOldSystem)
+		{
+			return true;
+		}
+
+		$updateData = $this->NotizModel->update(array('notiz_id' => $tag->retval[0]->notiz_id),
+			array('text' => $notizText,
+				'updateamum' => date('Y-m-d H:i:s'),
+				'updatevon' => $insertvonMockUser,
+				'bearbeiter_uid' => null,
+			)
+		);
+		if (isError($updateData))
+		{
+			error("Error occurred while updating Notiz: " . $updateData->message);
+			return false;
+		}
+
+		return true;
+	}
+}

application/core/ICollisionCheck.php

@@ -0,0 +1,10 @@
+<?php
+interface ICollisionCheck
+{
+	public function getName();
+
+	public function check($data);
+
+	public function checkAll($kalender_ids);
+
+}

application/core/Notiz_Controller.php

@@ -417,6 +417,7 @@ abstract class Notiz_Controller extends FHCAPI_Controller
 		$notiz_id = $this->input->post('notiz_id');
 
 		$this->NotizModel->addSelect('campus.tbl_dms_version.*');
+		$this->NotizModel->addSelect($this->NotizModel->escape(base_url('content/notizdokdownload.php?id=')) . ' || public.tbl_notiz_dokument.dms_id AS preview');
 
 		$this->NotizModel->addJoin('public.tbl_notiz_dokument', 'ON (public.tbl_notiz_dokument.notiz_id = public.tbl_notiz.notiz_id)');
 		$this->NotizModel->addJoin('campus.tbl_dms_version', 'ON (public.tbl_notiz_dokument.dms_id = campus.tbl_dms_version.dms_id)');

application/core/Tag_Controller.php

@@ -38,6 +38,8 @@ class Tag_Controller extends FHCAPI_Controller
 	public function getTag($readonly_tags = null)
 	{
 		$language = $this->_getLanguageIndex();
+		$index_bezeichnung_mehrsprachig = $language - 1;
+		
 		$id = $this->input->get('id');
 
 		if (is_array($readonly_tags) && !isEmptyArray($readonly_tags))
@@ -62,7 +64,7 @@ class Tag_Controller extends FHCAPI_Controller
 		$this->NotizModel->addSelect(
 			"tbl_notiz.titel, 
 			tbl_notiz.text, 
-			array_to_json(bezeichnung_mehrsprachig::varchar[])->>". $language. " as bezeichnung,
+			array_to_json(bezeichnung_mehrsprachig::varchar[])->>". $index_bezeichnung_mehrsprachig. " as bezeichnung,
 			tbl_notiz.notiz_id,
 			tbl_notiz_typ.style,
 			tbl_notiz.erledigt as done,
@@ -87,9 +89,12 @@ class Tag_Controller extends FHCAPI_Controller
 
 	public function getTags($tags = null)
 	{
+		$language = $this->_getLanguageIndex();
+		$index_bezeichnung_mehrsprachig = $language - 1;
+
 		$this->NotiztypModel->addSelect(
 			'typ_kurzbz as tag_typ_kurzbz,
-			array_to_json(bezeichnung_mehrsprachig::varchar[])->>0 as bezeichnung,
+			array_to_json(bezeichnung_mehrsprachig::varchar[])->>'. $index_bezeichnung_mehrsprachig. ' as bezeichnung,
 			style,
 			beschreibung,
 			tag
@@ -106,7 +111,36 @@ class Tag_Controller extends FHCAPI_Controller
 		$notiztypen = $this->NotiztypModel->loadWhere(array('aktiv' => true));
 		$this->terminateWithSuccess(hasData($notiztypen) ? getData($notiztypen) : array());
 	}
+	public function getTagsByAssignmentTypeValue($zuordnung_typ, $zuordnung_id, $tags = null)
+	{
+		$language = $this->_getLanguageIndex();
+		$index_bezeichnung_mehrsprachig = $language - 1;
 
+		$this->NotizzuordnungModel->addSelect(
+			'tbl_notizzuordnung.notiz_id as notiz_id,
+			typ_kurzbz as tag_typ_kurzbz,
+			array_to_json(bezeichnung_mehrsprachig::varchar[])->>'. $index_bezeichnung_mehrsprachig. ' as bezeichnung,
+			style,
+			beschreibung,
+			tag,
+			tbl_notiz.erledigt as done
+			'
+		);
+		
+		if (is_array($tags) && !isEmptyArray($tags))
+		{
+			$tags = $this->_filterTag($tags, false);
+			$this->NotizzuordnungModel->db->where_in('tbl_notiz_typ.typ_kurzbz', $tags);
+		}
+
+		$this->NotizzuordnungModel->addJoin('public.tbl_notiz', 'public.tbl_notizzuordnung.notiz_id = public.tbl_notiz.notiz_id');
+		$this->NotizzuordnungModel->addJoin('public.tbl_notiz_typ', 'public.tbl_notiz.typ = public.tbl_notiz_typ.typ_kurzbz');
+
+		$this->NotizzuordnungModel->addOrder('prioritaet');
+
+		$notiztypen = $this->NotizzuordnungModel->loadWhere(array('aktiv' => true, $zuordnung_typ => $zuordnung_id));
+		$this->terminateWithSuccess(hasData($notiztypen) ? getData($notiztypen) : array());
+	}
 	public function addTag($withZuordnung = true, $updatable_tags = null)
 	{
 		$postData = $this->getPostJson();
@@ -126,7 +160,7 @@ class Tag_Controller extends FHCAPI_Controller
 			if (!in_array($postData->tag_typ_kurzbz, $tags))
 				$this->terminateWithError($this->p->t('ui', 'keineBerechtigung'));
 		}
-
+		
 		if ($withZuordnung)
 		{
 			$return = array();
@@ -135,7 +169,7 @@ class Tag_Controller extends FHCAPI_Controller
 				$this->terminateWithError('Error occurred', self::ERROR_TYPE_GENERAL);
 
 			$values = array_unique($postData->values);
-
+			
 			foreach ($values as $value)
 			{
 				$insertResult = $this->addNotiz($postData);

application/helpers/hlp_common_helper.php

@@ -570,3 +570,13 @@ function buildDropdownEntryPrintArray($id, $name, $parameterurl, $uid=null, $ord
 		];
 
 }
+
+function generateUUID()
+{
+	$data = openssl_random_pseudo_bytes(16);
+
+	$data[6] = chr(ord($data[6]) & 0x0f | 0x40);
+	$data[8] = chr(ord($data[8]) & 0x3f | 0x80);
+
+	return vsprintf('%s%s-%s-%s-%s-%s%s%s', str_split(bin2hex($data), 4));
+}

application/libraries/AntragLib.php

@@ -128,7 +128,7 @@ class AntragLib
 			return $this->_ci->StudierendenantragstatusModel->resumeAntraegeForAbmeldungStgl($antrag_id);
 		}
 		// NOTE(chris): get last status that is not pause
-		$this->_ci->StudierendenantragstatusModel->addOrder('insertamum');
+		$this->_ci->StudierendenantragstatusModel->addOrder('insertamum', 'DESC');
 		$this->_ci->StudierendenantragstatusModel->addLimit(1);
 		$result = $this->_ci->StudierendenantragstatusModel->loadWhere([
 			'studierendenantrag_id' => $antrag_id,
@@ -1657,7 +1657,7 @@ class AntragLib
 
 		$result = $this->_ci->StudierendenantragModel->loadWithStatusWhere($where);
 		if (isError($result))
-		return $result;
+			return $result;
 
 		if (!hasData($result))
 			return error($this->_ci->p->t('studierendenantrag', "error_no_antrag_found", ['id' => $studierendenantrag_id]));
@@ -1709,6 +1709,7 @@ class AntragLib
 		$result->statustyp = $antrag->statustyp;
 		$result->status_insertvon = $antrag->status_insertvon;
 		$result->grund = $antrag->grund;
+		$result->status_grund = $antrag->status_grund;
 		$result->studierendenantrag_id = $antrag->studierendenantrag_id;
 		$result->typ = $antrag->typ;
 		$result->datum = $antrag->datum;

application/libraries/CollisionChecker.php

@@ -0,0 +1,74 @@
+<?php
+
+defined('BASEPATH') || exit('No direct script access allowed');
+
+use CI3_Events as Events;
+
+class CollisionChecker
+{
+	private $_checks = [];
+
+	private $_ci;
+	private $_uid;
+
+	public function __construct($params)
+	{
+		$this->_ci =& get_instance();
+
+		if (isset($params['uid']) && !isEmptyString($params['uid'])){
+			$this->_uid = $params['uid'];
+		} else {
+			show_error('uid of logged user not passed!');
+		}
+
+		$this->_ci->load->library('collision/checks/RoomCollisionCheck', ['uid' => $this->_uid]);
+		$this->_ci->load->library('collision/checks/LectureCollisionCheck', ['uid' => $this->_uid]);
+		$this->_ci->load->library('collision/checks/VerbandCollisionCheck', ['uid' => $this->_uid]);
+		$this->_ci->load->library('collision/checks/StudentCollisionCheck', ['uid' => $this->_uid]);
+		$this->_ci->load->library('collision/checks/ResourcesCollisionCheck', ['uid' => $this->_uid]);
+		$this->register($this->_ci->roomcollisioncheck);
+		$this->register($this->_ci->lecturecollisioncheck);
+		$this->register($this->_ci->verbandcollisioncheck);
+		$this->register($this->_ci->studentcollisioncheck);
+		$this->register($this->_ci->resourcescollisioncheck);
+		Events::trigger('collision_register', $this);
+	}
+
+	public function register(ICollisionCheck $check)
+	{
+		$this->_checks[$check->getName()] = $check;
+	}
+
+	public function run($data)
+	{
+		$errors = [];
+
+		foreach ($this->_checks as $check)
+		{
+			$result = $check->check($data);
+
+			if (!empty($result))
+			{
+				$errors = array_merge($errors, $result);
+			}
+		}
+
+		return $errors;
+	}
+
+	public function runAll($kalender_ids)
+	{
+		$results = array_fill_keys($kalender_ids, []);
+
+		foreach ($this->_checks as $check)
+		{
+			$batchResult = $check->checkAll($kalender_ids);
+			foreach ($batchResult as $kalender_id => $errors)
+			{
+				$results[$kalender_id] = array_merge($results[$kalender_id], $errors);
+			}
+		}
+
+		return $results;
+	}
+}

application/libraries/KalenderNotificationLib.php

@@ -0,0 +1,170 @@
+<?php
+
+if (! defined("BASEPATH")) exit("No direct script access allowed");
+
+class KalenderNotificationLib
+{
+	private $_ci;
+	public function __construct()
+	{
+		$this->_ci =& get_instance();
+		$this->_ci->load->library('MailLib');
+		$this->_ci->load->config('tempus');
+
+	}
+
+	public function sendMails($mail_infos)
+	{
+		if (!$this->_ci->config->item('send_update_mails'))
+			return true;
+
+		$lektor_added = array();
+		$lektor_changed = array();
+		$lektor_deleted = array();
+
+		$student_added = array();
+		$student_changed = array();
+		$student_deleted = array();
+
+		foreach ($mail_infos as $info)
+		{
+			$entry = $info['entry'];
+			$new_status = $info['new_status'];
+			$notify = $info['notify'];
+
+			$old_entry = null;
+			if ($entry->vorgaenger_kalender_id)
+			{
+				$this->_ci->KalenderModel->addJoin('lehre.tbl_kalender_ort', 'tbl_kalender.kalender_id = tbl_kalender_ort.kalender_id', 'LEFT');
+				$vorgaenger = $this->_ci->KalenderModel->load(array('tbl_kalender.kalender_id' => $entry->vorgaenger_kalender_id));
+				if (hasData($vorgaenger))
+					$old_entry = getData($vorgaenger)[0];
+			}
+
+			if ($new_status === 'deleted')
+				$row = $this->_buildMailDeleted($entry);
+			else if ($old_entry)
+				$row = $this->_buildMailChanged($old_entry, $entry);
+			else
+				$row = $this->_buildMailNew($entry);
+
+			if (in_array('lektor', $notify))
+			{
+				if ($new_status === 'deleted')
+					$lektor_deleted[] = $row;
+				else if ($old_entry)
+					$lektor_changed[] = $row;
+				else
+					$lektor_added[] = $row;
+			}
+
+			if (in_array('student', $notify))
+			{
+				if ($new_status === 'deleted')
+					$student_deleted[] = $row;
+				else if ($old_entry)
+					$student_changed[] = $row;
+				else
+					$student_added[] = $row;
+			}
+		}
+
+		$lektor_entries = '';
+		$student_entries = '';
+
+		if (!empty($lektor_added))
+			$lektor_entries .= $this->_addToList($lektor_added, 'hinzugefügt') . '<hr/>';
+
+		if (!empty($lektor_changed))
+			$lektor_entries .= $this->_addToList($lektor_changed, 'geändert') . '<hr/>';
+
+		if (!empty($lektor_deleted))
+			$lektor_entries .= $this->_addToList($lektor_deleted, 'gelöscht') . '<hr/>';
+
+		if (!empty($student_added))
+			$student_entries .= $this->_addToList($student_added, 'hinzugefügt') . '<hr/>';
+
+		if (!empty($student_changed))
+			$student_entries .= $this->_addToList($student_changed, 'geändert') . '<hr/>';
+
+		if (!empty($student_deleted))
+			$student_entries .= $this->_addToList($student_deleted, 'gelöscht') . '<hr/>';
+
+		if (!empty($lektor_entries))
+			$this->_ci->maillib->send('', '[email protected]', 'Lektor Tempus Update', $lektor_entries);
+		if (!empty($student_entries))
+			$this->_ci->maillib->send('', '[email protected]', 'Student Tempus Update', $student_entries);
+	}
+
+	private function _addToList($entries, $status)
+	{
+		return 'Folgende Einträge wurden <b>'. $status .'</b>: <ul>' . implode('', $entries) . '</ul>';
+
+	}
+	private function _buildMailNew($entry)
+	{
+		$von = date('d.m.Y H:i', strtotime($entry->von));
+		$bis = date('H:i', strtotime($entry->bis));
+
+		return '<li>
+					<b>Kalender ID ' . ($entry->kalender_id ?? '-') . '</b>
+					<ul>
+						<li><b>Uhrzeit:</b> ' . $von . ' - ' . $bis . '</li>
+						<li><b>Ort:</b> ' . ($entry->ort_kurzbz ?? '-') . '</li>
+					</ul>
+				</li>';
+	}
+
+	private function _buildMailChanged($old_entry, $new_entry)
+	{
+		$old_von = date('d.m.Y H:i', strtotime($old_entry->von));
+		$old_bis = date('H:i', strtotime($old_entry->bis));
+		$new_von = date('d.m.Y H:i', strtotime($new_entry->von));
+		$new_bis = date('H:i', strtotime($new_entry->bis));
+
+		$old_ort = $old_entry->ort_kurzbz ?? '-';
+		$new_ort = $new_entry->ort_kurzbz ?? '-';
+
+		$uhrzeit_changed = ($old_von . $old_bis) !== ($new_von . $new_bis);
+		$ort_changed = $old_ort !== $new_ort;
+
+		$changes = '';
+
+		if ($uhrzeit_changed)
+		{
+			$changes .= '<li>
+							<b>Uhrzeit:</b>
+							<s style="color:red;">' . $old_von . ' - ' . $old_bis . '</s>
+							<span style="color:green;">' . $new_von . ' - ' . $new_bis . '</span>
+						</li>';
+		}
+
+		if ($ort_changed)
+		{
+			$changes .= '<li>
+				<b>Ort:</b>
+				<s style="color:red;">' . $old_ort . '</s>
+				<span style="color:green;">' . $new_ort . '</span>
+			</li>';
+		}
+
+		return '<li>
+					<b>Kalender ID ' . ($new_entry->kalender_id ?? '-') . '</b>
+					<ul>' . $changes . '</ul>
+				</li>';
+	}
+
+	private function _buildMailDeleted($entry)
+	{
+		$von = date('d.m.Y H:i', strtotime($entry->von));
+		$bis = date('H:i', strtotime($entry->bis));
+
+		return '<li style="color:red;">
+					<b><s>Kalender ID ' . ($entry->kalender_id ?? '-') . '</s></b>
+					<ul>
+						<li><s>' . $von . ' - ' . $bis . '</s></li>
+						<li><s>' . ($entry->ort_kurzbz ?? '-') . '</s></li>
+					</ul>
+				</li>';
+	}
+}

application/libraries/LvPlanCSVLib.php

@@ -0,0 +1,420 @@
+<?php
+
+if (!defined('BASEPATH'))
+	exit('No direct script access allowed');
+
+class LvPlanCSVLib
+{
+	const TARGET_OUTLOOK = 'outlook';
+
+	const GENERIC_HEADER = array(
+		'title',
+		'category',
+		'location',
+		'description',
+		'keywords',
+		'start_date',
+		'start_time',
+		'end_date',
+		'end_time',
+		'alarm',
+		'recur_type',
+		'recur_end_date',
+		'recur_interval',
+		'recur_data'
+	);
+
+	const OUTLOOK_HEADER = array(
+		'Betreff',
+		'Beginnt am',
+		'Beginnt um',
+		'Endet am',
+		'Endet um',
+		'Ganztaegiges Ereignis',
+		'Erinnerung Ein/Aus',
+		'Erinnerung am',
+		'Erinnerung um',
+		'Besprechungsplanung',
+		'Erforderliche Teilnehmer',
+		'Optionale Teilnehmer',
+		'Besprechungsressourcen',
+		'Abrechnungsinformationen',
+		'Beschreibung',
+		'Kategorien',
+		'Ort',
+		'Priorität',
+		'Privat',
+		'Reisekilometer',
+		'Vertraulichkeit',
+		'Zeitspanne zeigen als'
+	);
+
+	private $ci;
+
+	public function __construct()
+	{
+		$this->ci =& get_instance();
+	}
+
+	/**
+	 * Builds CSV content for a user's timetable.
+	 *
+	 * @param string $uid User UID.
+	 * @param int $begin First included date as Unix timestamp.
+	 * @param int $ende Last included date as Unix timestamp.
+	 * @param string $type Timetable type (student, lektor, ort or verband).
+	 * @param string|null $target Optional CSV target (outlook).
+	 * @param string|null $ortKurzbz Room identifier for room plans.
+	 * @param array|null $verbandFilters Lehrverband filters.
+	 * @return string
+	 */
+	public function getContent(
+		$uid,
+		$begin,
+		$ende,
+		$type,
+		$target = null,
+		$ortKurzbz = null,
+		$verbandFilters = null
+	) {
+		if (!in_array($type, array('student', 'lektor', 'ort', 'verband'), true))
+			throw new InvalidArgumentException('Unsupported timetable type');
+		if ($target !== null && $target !== self::TARGET_OUTLOOK)
+			throw new InvalidArgumentException('Unsupported CSV target');
+		if ($type === 'ort' && (!is_string($ortKurzbz) || $ortKurzbz === ''))
+			throw new InvalidArgumentException('Missing room timetable filter');
+		if ($type === 'verband'
+			&& (!is_array($verbandFilters)
+				|| !array_key_exists('stg_kz', $verbandFilters)
+				|| !array_key_exists('sem', $verbandFilters)))
+		{
+			throw new InvalidArgumentException('Missing Lehrverband timetable filters');
+		}
+
+		$isLecturer = $type === 'lektor';
+		$this->ci->load->library('KalenderLib', array('uid' => $uid));
+
+		$startDate = date('Y-m-d', $begin);
+		$endDate = date('Y-m-d', $ende);
+
+		if ($type === 'verband')
+		{
+			$events = $this->ci->kalenderlib->getPlanForVerband(
+				$startDate,
+				$endDate,
+				$verbandFilters['stg_kz'],
+				$verbandFilters['sem'],
+				isset($verbandFilters['ver']) ? $verbandFilters['ver'] : null,
+				isset($verbandFilters['grp']) ? $verbandFilters['grp'] : null
+			);
+		}
+		elseif ($type === 'ort')
+		{
+			$events = $this->ci->kalenderlib
+				->getPlanForRoom($startDate, $endDate, $ortKurzbz);
+		}
+		elseif ($isLecturer)
+		{
+			$events = $this->ci->kalenderlib
+				->getPlanForLecturerByLecturer($startDate, $endDate, $uid);
+		}
+		else
+		{
+			$events = $this->ci->kalenderlib
+				->getPlanForStudentByStudent($startDate, $endDate, $uid);
+		}
+
+		if (!is_array($events))
+			$events = array();
+
+		$content = $this->buildCSVLine(
+			$target === self::TARGET_OUTLOOK ? self::OUTLOOK_HEADER : self::GENERIC_HEADER
+		);
+
+		foreach ($events as $event)
+		{
+			$eventData = $this->getEventData($event, $type);
+			if ($eventData === null)
+				continue;
+
+			$content .= $this->buildCSVLine(
+				$target === self::TARGET_OUTLOOK
+					? $this->buildOutlookRow($eventData)
+					: $this->buildGenericRow($eventData)
+			);
+		}
+
+		return $content;
+	}
+
+	/**
+	 * @param object $event Calendar event.
+	 * @return array|null Normalized CSV values or null for invalid dates.
+	 */
+	private function getEventData($event, $type = null)
+	{
+		$start = $this->createDateTime(isset($event->isostart) ? $event->isostart : null);
+		$end = $this->createDateTime(isset($event->isoend) ? $event->isoend : null);
+
+		if ($start === null || $end === null)
+			return null;
+
+		$timezone = new DateTimeZone('Europe/Vienna');
+		$start->setTimezone($timezone);
+		$end->setTimezone($timezone);
+
+		$isReservation = isset($event->type) && $event->type === 'reservierung';
+		
+		$title = $isReservation
+			? (isset($event->titel) ? $event->titel : '')
+			: $this->joinValues(isset($event->topic) ? $event->topic : array());
+		if ($type === 'verband') {
+			$title = '';
+		}
+
+		$location = $this->joinValues(
+			isset($event->ort_kurzbz) ? $event->ort_kurzbz : array(),
+			' / '
+		);
+
+		$description = $this->getDescription(
+			$event,
+			$isReservation
+		);
+
+		return array(
+			'title' => $title,
+			'location' => $location,
+			'description' => $description,
+			'start_date' => $start->format('d.m.Y'),
+			'start_time' => $start->format('H:i:s'),
+			'end_date' => $end->format('d.m.Y'),
+			'end_time' => $end->format('H:i:s')
+		);
+	}
+
+	/**
+	 * Builds a localized event description from populated event details.
+	 *
+	 * @param object $event Calendar event.
+	 * @param bool $isReservation Whether the event is a reservation.
+	 * @param string $participants Participant abbreviations.
+	 * @param string $lecturers Lecturer abbreviations.
+	 * @param string $groups Participant group labels.
+	 * @return string Description lines separated by CRLF.
+	 */
+	private function getDescription($event, $isReservation)
+	{
+		$groups = $this->getGroups($event);
+		$lecturers = $this->getLecturers($event);
+		$participants = $this->getParticipants($event);
+
+		$parts = array();
+		if ($isReservation)
+		{
+			if ($participants !== '')
+				$parts[] = $this->ci->p->t('ui', 'teilnehmende').': '.$participants;
+		}
+		else
+		{
+			$subject = isset($event->lehrfach_bez) ? $event->lehrfach_bez : '';
+
+			if ($subject !== '')
+				$parts[] = $this->ci->p->t('global', 'lehrfach').': '.$subject;
+			if ($lecturers !== '')
+				$parts[] = $this->ci->p->t('lehre', 'lektorInnen').': '.$lecturers;
+		}
+
+		if ($groups !== '')
+			$parts[] = $this->ci->p->t('global', 'gruppen').': '.$groups;
+
+		$description = isset($event->beschreibung) ? $event->beschreibung : '';
+		if ($description !== '')
+			$parts[] = $this->ci->p->t('global', 'beschreibung').': '.$description;
+
+		return implode("\r\n", $parts);
+	}
+
+	/**
+	 * @param array $eventData Normalized event values.
+	 * @return array Generic CSV row.
+	 */
+	private function buildGenericRow(array $eventData)
+	{
+		$category = defined('LVPLAN_KATEGORIE') ? LVPLAN_KATEGORIE : 'StundenplanTW';
+
+		return array(
+			$eventData['title'],
+			$category,
+			$eventData['location'],
+			$eventData['description'],
+			'Stundenplan',
+			$eventData['start_date'],
+			$eventData['start_time'],
+			$eventData['end_date'],
+			$eventData['end_time'],
+			'',
+			'',
+			'',
+			'',
+			''
+		);
+	}
+
+	/**
+	 * @param array $eventData Normalized event values.
+	 * @return array Outlook CSV row.
+	 */
+	private function buildOutlookRow(array $eventData)
+	{
+		$subject = $eventData['title'];
+
+		return array(
+			$subject,
+			$eventData['start_date'],
+			$eventData['start_time'],
+			$eventData['end_date'],
+			$eventData['end_time'],
+			'Aus',
+			'Aus',
+			'',
+			'',
+			'',
+			'',
+			'',
+			'',
+			'',
+			$eventData['description'],
+			'StundenplanFH',
+			$eventData['location'],
+			'Normal',
+			'Aus',
+			'',
+			'Normal',
+			'2'
+		);
+	}
+
+	/**
+	 * @param object $event Calendar event.
+	 * @return string Lecturer abbreviations.
+	 */
+	private function getLecturers($event)
+	{
+		$lecturers = array();
+
+		if (isset($event->lektor) && is_array($event->lektor))
+		{
+			foreach ($event->lektor as $lecturer)
+			{
+				if (isset($lecturer['kurzbz']) && $lecturer['kurzbz'] !== '')
+					$lecturers[] = $lecturer['kurzbz'];
+			}
+		}
+
+		sort($lecturers, SORT_NATURAL | SORT_FLAG_CASE);
+		
+		return implode(' / ', array_unique($lecturers));
+	}
+
+	/**
+	 * @param object $event Calendar event.
+	 * @return string Participant group labels.
+	 */
+	private function getGroups($event)
+	{
+		$groups = array();
+
+		if (isset($event->gruppe) && is_array($event->gruppe))
+		{
+			foreach ($event->gruppe as $group)
+			{
+				if (isset($group['bezeichnung']) && $group['bezeichnung'] !== '')
+					$groups[] = $group['bezeichnung'];
+			}
+		}
+
+		if (isset($event->teilnehmer_gruppe) && is_array($event->teilnehmer_gruppe))
+		{
+			foreach ($event->teilnehmer_gruppe as $group)
+			{
+				if (isset($group['gruppe_kurzbz']) && $group['gruppe_kurzbz'] !== '')
+					$groups[] = $group['gruppe_kurzbz'];
+			}
+		}
+
+		sort($groups, SORT_NATURAL | SORT_FLAG_CASE);
+
+		return implode(' / ', array_unique($groups));
+	}
+
+	/**
+	 * @param mixed $value String or list of strings.
+	 * @param string $separator Join separator.
+	 * @return string
+	 */
+	private function joinValues($value, $separator = ' / ')
+	{
+		return is_array($value) ? implode($separator, $value) : (string)$value;
+	}
+
+	/**
+	 * Builds one fully quoted RFC-style CSV row.
+	 *
+	 * @param array $values Row values.
+	 * @return string
+	 */
+	private function buildCSVLine(array $values)
+	{
+		$escapedValues = array_map(function ($value) {
+			$value = preg_replace('/\r\n|\r|\n/', "\r\n", (string)$value);
+			return '"'.str_replace('"', '""', $value).'"';
+		}, $values);
+
+		return implode(',', $escapedValues)."\r\n";
+	}
+
+	/**
+	 * @param mixed $dateTime Date/time input.
+	 * @return DateTime|null
+	 */
+	private function createDateTime($dateTime)
+	{
+		if ($dateTime instanceof DateTime)
+			return clone $dateTime;
+
+		if ($dateTime === null || $dateTime === '')
+			return null;
+
+		try
+		{
+			if (is_numeric($dateTime))
+				return new DateTime('@'.(int)$dateTime);
+
+			return new DateTime($dateTime);
+		}
+		catch (Exception $e)
+		{
+			return null;
+		}
+	}
+
+	private function getParticipants($event)
+	{
+		$values = array();
+		if (!isset($event->teilnehmer_person) || !is_array($event->teilnehmer_person))
+			return '';
+
+		foreach ($event->teilnehmer_person as $participant)
+		{
+			$value = $participant['kurzbz'];
+
+			if ($value !== '')
+				$values[] = $value;
+		}
+
+		sort($values, SORT_NATURAL | SORT_FLAG_CASE);
+
+		return implode(', ', array_unique($values));
+	}
+}

application/libraries/LvPlanExcelLib.php

@@ -0,0 +1,473 @@
+<?php
+
+if (!defined('BASEPATH'))
+	exit('No direct script access allowed');
+
+require_once(FHCPATH.'include/Excel/excel.php');
+
+class LvPlanExcelLib
+{
+	const WORKSHEET_NAME = 'Termine';
+
+	const HEADER = array(
+		'Datum',
+		'Von',
+		'Bis',
+		'Ort',
+		'Lektoren',
+		'Gruppen',
+		'Lehrfach',
+		'Anmerkung',
+		'StundeVon',
+		'StundeBis'
+	);
+
+	private $ci;
+
+	public function __construct()
+	{
+		$this->ci =& get_instance();
+	}
+
+	/**
+	 * Builds a BIFF8 Excel workbook for a user's timetable.
+	 *
+	 * @param string $uid User UID.
+	 * @param int $begin First included date as Unix timestamp.
+	 * @param int $ende Last included date as Unix timestamp.
+	 * @param string $type Timetable type (student, lektor, ort or verband).
+	 * @param string|null $ortKurzbz Room identifier for room plans.
+	 * @param array|null $verbandFilters Lehrverband filters.
+	 * @return string Binary workbook content.
+	 */
+	public function getContent(
+		$uid,
+		$begin,
+		$ende,
+		$type,
+		$ortKurzbz = null,
+		$verbandFilters = null
+	) {
+		if (!in_array($type, array('student', 'lektor', 'ort', 'verband'), true))
+			throw new InvalidArgumentException('Unsupported timetable type');
+		if ($type === 'ort' && (!is_string($ortKurzbz) || $ortKurzbz === ''))
+			throw new InvalidArgumentException('Missing room timetable filter');
+		if ($type === 'verband'
+			&& (!is_array($verbandFilters)
+				|| !array_key_exists('stg_kz', $verbandFilters)
+				|| !array_key_exists('sem', $verbandFilters)))
+		{
+			throw new InvalidArgumentException('Missing Lehrverband timetable filters');
+		}
+
+		$isLecturer = $type === 'lektor';
+		$this->ci->load->library('KalenderLib', array('uid' => $uid));
+		$this->ci->load->model('ressource/Stunde_model', 'StundeModel');
+
+		$startDate = date('Y-m-d', $begin);
+		$endDate = date('Y-m-d', $ende);
+
+		if ($type === 'verband')
+		{
+			$events = $this->ci->kalenderlib->getPlanForVerband(
+				$startDate,
+				$endDate,
+				$verbandFilters['stg_kz'],
+				$verbandFilters['sem'],
+				isset($verbandFilters['ver']) ? $verbandFilters['ver'] : null,
+				isset($verbandFilters['grp']) ? $verbandFilters['grp'] : null
+			);
+		}
+		elseif ($type === 'ort')
+		{
+			$events = $this->ci->kalenderlib
+				->getPlanForRoom($startDate, $endDate, $ortKurzbz);
+		}
+		elseif ($isLecturer)
+		{
+			$events = $this->ci->kalenderlib
+				->getPlanForLecturerByLecturer($startDate, $endDate, $uid);
+		}
+		else
+		{
+			$events = $this->ci->kalenderlib
+				->getPlanForStudentByStudent($startDate, $endDate, $uid);
+		}
+
+		if (!is_array($events))
+			$events = array();
+
+		usort($events, array($this, 'compareEventsByStart'));
+		$hourRaster = $this->loadHourRaster();
+		$rows = array();
+
+		foreach ($events as $event)
+		{
+			$row = $this->buildEventRow($event, $hourRaster);
+			if ($row !== null)
+				$rows[] = $row;
+		}
+
+		return $this->buildWorkbook($rows);
+	}
+
+	/**
+	 * @return array Timetable-hour raster ordered by hour number.
+	 */
+	private function loadHourRaster()
+	{
+		$this->ci->StundeModel->addSelect('stunde, beginn, ende');
+		$this->ci->StundeModel->addOrder('stunde', 'ASC');
+		$result = $this->ci->StundeModel->load();
+
+		if (isError($result))
+			throw new RuntimeException(getError($result));
+
+		if (!hasData($result))
+			return array();
+
+		$raster = array();
+		foreach (getData($result) as $hour)
+		{
+			$begin = $this->timeToSeconds($hour->beginn);
+			$end = $this->timeToSeconds($hour->ende);
+
+			if ($begin === null || $end === null)
+				continue;
+
+			$raster[] = array(
+				'stunde' => $hour->stunde,
+				'begin' => $begin,
+				'end' => $end
+			);
+		}
+
+		return $raster;
+	}
+
+	/**
+	 * @param object $event Calendar event.
+	 * @param array $hourRaster Timetable-hour raster.
+	 * @return array|null Excel row or null for invalid dates.
+	 */
+	private function buildEventRow($event, array $hourRaster)
+	{
+		$start = $this->createDateTime(isset($event->isostart) ? $event->isostart : null);
+		$end = $this->createDateTime(isset($event->isoend) ? $event->isoend : null);
+
+		if ($start === null || $end === null)
+			return null;
+
+		$timezone = new DateTimeZone('Europe/Vienna');
+		$start->setTimezone($timezone);
+		$end->setTimezone($timezone);
+
+		$isReservation = isset($event->type) && $event->type === 'reservierung';
+		$subject = $this->getSubject($event);
+
+		$note = isset($event->beschreibung) ? $event->beschreibung : '';
+		if ($note === '' && isset($event->titel) && !$isReservation)
+			$note = $event->titel;
+
+		return array(
+			$start->format('d.m.Y'),
+			$start->format('H:i:s'),
+			$end->format('H:i:s'),
+			$this->joinValues(isset($event->ort_kurzbz) ? $event->ort_kurzbz : array()),
+			!$isReservation ? $this->getParticipants($event) : $this->getLecturers($event),
+			$this->getGroups($event),
+			$subject,
+			$note,
+			$this->findHour($start->format('H:i:s'), $hourRaster, "start"),
+			$this->findHour($end->format('H:i:s'), $hourRaster, "end")
+		);
+	}
+
+	/**
+	 * @param object $event Calendar event.
+	 * @return string Event subject.
+	 */
+	private function getSubject($event)
+	{
+		if (isset($event->type) && $event->type === 'reservierung')
+		{
+			return isset($event->titel) ? $event->titel : '';
+		}
+
+		$subject = isset($event->lehrfach_bez) ? $event->lehrfach_bez : '';
+
+		if ($subject === '')
+			$subject = $this->joinValues(isset($event->topic) ? $event->topic : array());
+
+		return $subject;
+	}
+
+	/**
+	 * @param array $rows Workbook rows.
+	 * @return string Binary BIFF8 workbook content.
+	 */
+	private function buildWorkbook(array $rows)
+	{
+		$tempFile = tempnam(sys_get_temp_dir(), 'lvplan_excel_');
+		if ($tempFile === false)
+			throw new RuntimeException('Could not create temporary Excel file');
+
+		try
+		{
+			$workbook = new Spreadsheet_Excel_Writer($tempFile);
+			$workbook->setVersion(8);
+			$workbook->setTempDir(sys_get_temp_dir());
+
+			$worksheet =& $workbook->addWorksheet(self::WORKSHEET_NAME);
+			$worksheet->setInputEncoding('utf-8');
+
+			$boldFormat =& $workbook->addFormat();
+			$boldFormat->setBold();
+
+			$maxLengths = array();
+			foreach (self::HEADER as $column => $title)
+			{
+				$worksheet->writeString(0, $column, $title, $boldFormat);
+				$maxLengths[$column] = $this->getMaxLineLength($title);
+			}
+
+			foreach ($rows as $rowIndex => $row)
+			{
+				foreach ($row as $column => $value)
+				{
+					$value = (string)$value;
+					$worksheet->writeString($rowIndex + 1, $column, $value);
+					$maxLengths[$column] = max(
+						$maxLengths[$column],
+						$this->getMaxLineLength($value)
+					);
+				}
+			}
+
+			foreach ($maxLengths as $column => $length)
+				$worksheet->setColumn($column, $column, min($length + 2, 255));
+
+			$result = $workbook->close();
+			if ($result !== true)
+				throw new RuntimeException('Could not generate Excel workbook');
+
+			$content = file_get_contents($tempFile);
+			if ($content === false)
+				throw new RuntimeException('Could not read generated Excel workbook');
+
+			return $content;
+		}
+		finally
+		{
+			if (is_file($tempFile))
+				unlink($tempFile);
+		}
+	}
+
+	/**
+	 * @param object $event Calendar event.
+	 * @return string Lecturer names.
+	 */
+	private function getLecturers($event)
+	{
+		$lecturers = array();
+
+		if (isset($event->lektor) && is_array($event->lektor))
+		{
+			foreach ($event->lektor as $lecturer)
+			{
+				$name = trim(
+					(isset($lecturer['vorname']) ? $lecturer['vorname'] : '').' '
+					.(isset($lecturer['nachname']) ? $lecturer['nachname'] : '')
+				);
+
+				if ($name === '' && isset($lecturer['kurzbz']))
+					$name = $lecturer['kurzbz'];
+				if ($name !== '')
+					$lecturers[] = $name;
+			}
+		}
+
+		sort($lecturers, SORT_NATURAL | SORT_FLAG_CASE);
+
+		return implode(', ', array_unique($lecturers));
+	}
+
+	/**
+	 * @param object $event Calendar event.
+	 * @return string Participant group labels.
+	 */
+	private function getGroups($event)
+	{
+		$groups = array();
+
+		if (isset($event->gruppe) && is_array($event->gruppe))
+		{
+			foreach ($event->gruppe as $group)
+			{
+				if (isset($group['bezeichnung']) && $group['bezeichnung'] !== '')
+					$groups[] = $group['bezeichnung'];
+			}
+		}
+
+		if (isset($event->teilnehmer_gruppe) && is_array($event->teilnehmer_gruppe))
+		{
+			foreach ($event->teilnehmer_gruppe as $group)
+			{
+				if (isset($group['gruppe_kurzbz']) && $group['gruppe_kurzbz'] !== '')
+					$groups[] = $group['gruppe_kurzbz'];
+			}
+		}
+
+		sort($groups, SORT_NATURAL | SORT_FLAG_CASE);
+
+		return implode(',', array_unique($groups));
+	}
+
+	/**
+	 * @param string $time Local time.
+	 * @param array $hourRaster Timetable-hour raster.
+	 * @return string|int Timetable-hour number or an empty string.
+	 */
+	private function findHour($time, array $hourRaster, string $context = '')
+	{
+		$seconds = $this->timeToSeconds($time);
+		if ($seconds === null || count($hourRaster) === 0)
+			return '';
+
+		$firstHour = current($hourRaster);
+		$lastHour = end($hourRaster);
+		if ($seconds < $firstHour['begin'] || $seconds > $lastHour['end'])
+			return '';
+
+		foreach ($hourRaster as $hour)
+		{
+			if (
+				($seconds < $hour['end'] && $context === "start") ||
+				($seconds <= $hour['end'] && $context === "end")
+			)
+				return $hour['stunde'];
+		}
+
+		return '';
+	}
+
+	/**
+	 * @param string $time Time in HH:MM[:SS] format.
+	 * @return int|null Seconds since midnight.
+	 */
+	private function timeToSeconds($time)
+	{
+		if (!is_string($time) || !preg_match('/^(\d{1,2}):(\d{2})(?::(\d{2}))?$/', $time, $matches))
+			return null;
+
+		$hour = (int)$matches[1];
+		$minute = (int)$matches[2];
+		$second = isset($matches[3]) ? (int)$matches[3] : 0;
+
+		if ($hour > 23 || $minute > 59 || $second > 59)
+			return null;
+
+		return $hour * 3600 + $minute * 60 + $second;
+	}
+
+	/**
+	 * @param mixed $value String or list of strings.
+	 * @return string
+	 */
+	private function joinValues($value)
+	{
+		return is_array($value) ? implode(' / ', $value) : (string)$value;
+	}
+
+	/**
+	 * @param string $value Cell content.
+	 * @return int Maximum visual line length.
+	 */
+	private function getMaxLineLength($value)
+	{
+		$lines = preg_split('/\r\n|\r|\n/', (string)$value);
+		$maxLength = 0;
+
+		foreach ($lines as $line)
+			$maxLength = max($maxLength, mb_strlen($line));
+
+		return $maxLength;
+	}
+
+	/**
+	 * @param object $first First event.
+	 * @param object $second Second event.
+	 * @return int Comparison result.
+	 */
+	private function compareEventsByStart($first, $second)
+	{
+		$firstTimestamp = isset($first->isostart) ? strtotime($first->isostart) : false;
+		$secondTimestamp = isset($second->isostart) ? strtotime($second->isostart) : false;
+
+		$firstTimestamp = $firstTimestamp === false ? PHP_INT_MAX : $firstTimestamp;
+		$secondTimestamp = $secondTimestamp === false ? PHP_INT_MAX : $secondTimestamp;
+
+		if ($firstTimestamp === $secondTimestamp)
+			return 0;
+
+		return $firstTimestamp < $secondTimestamp ? -1 : 1;
+	}
+
+	/**
+	 * @param mixed $dateTime Date/time input.
+	 * @return DateTime|null
+	 */
+	private function createDateTime($dateTime)
+	{
+		if ($dateTime instanceof DateTime)
+			return clone $dateTime;
+
+		if ($dateTime === null || $dateTime === '')
+			return null;
+
+		try
+		{
+			if (is_numeric($dateTime))
+				return new DateTime('@'.(int)$dateTime);
+
+			return new DateTime($dateTime);
+		}
+		catch (Exception $e)
+		{
+			return null;
+		}
+	}
+
+	private function getParticipants($event)
+	{
+		$values = array();
+		if (!isset($event->teilnehmer_person) || !is_array($event->teilnehmer_person))
+			return '';
+
+		foreach ($event->teilnehmer_person as $participant)
+		{
+			$value = $participant['vorname'] . ' ' . $participant['nachname'];
+
+			if ($value !== '')
+				$values[] = $value;
+		}
+
+		sort($values, SORT_NATURAL | SORT_FLAG_CASE);
+
+		return implode(', ', array_unique($values));
+	}
+
+	private function getNestedValue($value, array $properties)
+	{
+		foreach ($properties as $property)
+		{
+			if (is_array($value) && isset($value[$property]))
+				return (string)$value[$property];
+			if (is_object($value) && isset($value->{$property}))
+				return (string)$value->{$property};
+		}
+
+		return is_scalar($value) ? (string)$value : '';
+	}
+}

application/libraries/LvPlanHTMLDetailLib.php

@@ -0,0 +1,780 @@
+<?php
+
+if (!defined('BASEPATH'))
+	exit('No direct script access allowed');
+
+require_once(FHCPATH.'include/functions.inc.php');
+require_once(FHCPATH.'include/phrasen.class.php');
+
+class LvPlanHTMLDetailLib
+{
+	const TIMEZONE = 'Europe/Vienna';
+
+	private $ci;
+	private $legacyPhrases;
+
+	public function __construct()
+	{
+		$this->ci =& get_instance();
+		$this->legacyPhrases = new phrasen(getSprache());
+	}
+
+	/**
+	 * Builds a timetable detail document for one date and hour.
+	 *
+	 * @param string $datum Date in YYYY-MM-DD format.
+	 * @param array $hour Selected timetable hour.
+	 * @param string $type Timetable type.
+	 * @param array $filters Type-specific filters.
+	 * @return string
+	 */
+	public function getContent($datum, array $hour, $type, array $filters)
+	{
+		if (!in_array($type, array('student', 'lektor', 'verband', 'ort'), true))
+			throw new InvalidArgumentException('Unsupported timetable type');
+		foreach (array('number', 'begin', 'end') as $property)
+		{
+			if (!isset($hour[$property]) || !is_scalar($hour[$property]))
+				throw new InvalidArgumentException('Invalid timetable hour');
+		}
+
+		$events = $this->loadEvents($datum, $type, $filters);
+		$events = $this->filterEventsByHour($events, $datum, $hour);
+		if ($type === 'verband'
+			&& isset($filters['ort_kurzbz'])
+			&& $filters['ort_kurzbz'] !== '')
+		{
+			$events = $this->filterEventsByRoom(
+				$events,
+				$filters['ort_kurzbz']
+			);
+		}
+		$sections = array(
+			'teaching' => array(),
+			'reservations' => array(),
+			'events' => array()
+		);
+
+		foreach ($events as $event)
+		{
+			if ($event->type === 'lehreinheit')
+				$sections['teaching'][] = $event;
+			elseif ($event->type === 'reservierung')
+				$sections['reservations'][] = $event;
+			else
+				$sections['events'][] = $event;
+		}
+
+		return $this->renderDocument($datum, $hour, $sections);
+	}
+
+	/**
+	 * Loads the same published calendar data used by the HTML preview.
+	 *
+	 * @return array
+	 */
+	private function loadEvents($datum, $type, array $filters)
+	{
+		$uid = isset($filters['uid']) && is_string($filters['uid'])
+			? $filters['uid']
+			: getAuthUID();
+		$this->ci->load->library('KalenderLib', array('uid' => $uid));
+
+		if ($type === 'verband')
+		{
+			$events = $this->ci->kalenderlib->getPlanForVerband(
+				$datum,
+				$datum,
+				$filters['stg_kz'],
+				$filters['sem'],
+				isset($filters['ver']) ? $filters['ver'] : null,
+				isset($filters['grp']) ? $filters['grp'] : null
+			);
+		}
+		elseif ($type === 'ort')
+		{
+			$events = $this->ci->kalenderlib->getPlanForRoom(
+				$datum,
+				$datum,
+				$filters['ort_kurzbz']
+			);
+		}
+		elseif ($type === 'lektor')
+		{
+			$events = $this->ci->kalenderlib->getPlanForLecturerByLecturer(
+				$datum,
+				$datum,
+				$filters['uid']
+			);
+		}
+		else
+		{
+			$events = $this->ci->kalenderlib->getPlanForStudentByStudent(
+				$datum,
+				$datum,
+				$filters['uid']
+			);
+		}
+
+		return is_array($events) ? $events : array();
+	}
+
+	/**
+	 * Keeps events that overlap the selected timetable hour.
+	 *
+	 * @return array
+	 */
+	private function filterEventsByHour(array $events, $datum, array $hour)
+	{
+		$timezone = new DateTimeZone(self::TIMEZONE);
+		$hourStart = DateTime::createFromFormat(
+			'!Y-m-d H:i:s',
+			$datum.' '.$this->normalizeTime($hour['begin']),
+			$timezone
+		);
+		$hourEnd = DateTime::createFromFormat(
+			'!Y-m-d H:i:s',
+			$datum.' '.$this->normalizeTime($hour['end']),
+			$timezone
+		);
+
+		if ($hourStart === false || $hourEnd === false || $hourEnd <= $hourStart)
+			throw new InvalidArgumentException('Invalid timetable hour range');
+
+		$matches = array();
+		foreach ($events as $event)
+		{
+			$start = $this->getEventDateTime($event, 'isostart', 'datum', 'beginn');
+			$end = $this->getEventDateTime($event, 'isoend', 'datum', 'ende');
+
+			if ($start === null || $end === null || $end <= $start)
+				continue;
+			if ($start < $hourEnd && $end > $hourStart)
+			{
+				$matches[] = array(
+					'event' => $event,
+					'start' => $start,
+					'end' => $end
+				);
+			}
+		}
+
+		usort($matches, function ($first, $second) {
+			$comparison = $first['start']->getTimestamp()
+				<=> $second['start']->getTimestamp();
+			if ($comparison !== 0)
+				return $comparison;
+
+			$firstId = isset($first['event']->kalender_id)
+				? (int)$first['event']->kalender_id
+				: 0;
+			$secondId = isset($second['event']->kalender_id)
+				? (int)$second['event']->kalender_id
+				: 0;
+			return $firstId <=> $secondId;
+		});
+
+		return array_map(function ($match) {
+			return $match['event'];
+		}, $matches);
+	}
+
+	/**
+	 * Keeps Verband events assigned to the room selected in the preview cell.
+	 *
+	 * @return array
+	 */
+	private function filterEventsByRoom(array $events, $ortKurzbz)
+	{
+		$matches = array();
+		foreach ($events as $event)
+		{
+			$rooms = isset($event->ort_kurzbz)
+				? $event->ort_kurzbz
+				: array();
+			if (!is_array($rooms))
+				$rooms = array($rooms);
+
+			foreach ($rooms as $room)
+			{
+				if (is_scalar($room) && (string)$room === (string)$ortKurzbz)
+				{
+					$matches[] = $event;
+					continue 2;
+				}
+			}
+
+			if (!isset($event->ort_details) || !is_array($event->ort_details))
+				continue;
+
+			foreach ($event->ort_details as $room)
+			{
+				if ($this->getNestedValue($room, 'ort_kurzbz') === (string)$ortKurzbz)
+				{
+					$matches[] = $event;
+					continue 2;
+				}
+			}
+		}
+
+		return $matches;
+	}
+
+	/**
+	 * Renders the complete HTML document.
+	 */
+	private function renderDocument($datum, array $hour, array $sections)
+	{
+		$title = $this->phrase('lvplan', 'lehrveranstaltungsplanDetails');
+		$html = '<!DOCTYPE html><html lang="de"><head><meta charset="UTF-8">';
+		$html .= '<meta name="viewport" content="width=device-width, initial-scale=1">';
+		$html .= '<title>'.$this->escape($title).'</title>';
+		$html .= '<link rel="stylesheet" href="'
+			.$this->escape($this->getAppRoot().'skin/style.css.php')
+			.'" type="text/css">';
+		$html .= '<style>'
+			.'.stdplan td{vertical-align:top}.detail-lines{white-space:normal}'
+			.'.detail-empty{color:#666}.stdplan{margin-bottom:1em}'
+			.'</style></head><body id="inhalt">';
+		$html .= '<h2>'.$this->escape($this->phrase('lvplan', 'lehrveranstaltungsplan'))
+			.' &rArr; '.$this->escape($this->phrase('abgabetool', 'details')).'</h2>';
+		$html .= $this->escape($this->phrase('abgabetool', 'datum')).': '
+			.$this->escape($this->formatDate($datum)).'<br>';
+		$html .= $this->escape($this->phrase('global', 'stunde')).': '
+			.$this->escape($hour['number']).' ('
+			.$this->escape(substr((string)$hour['begin'], 0, 5)).'–'
+			.$this->escape(substr((string)$hour['end'], 0, 5)).')<br><br>';
+
+		if (!empty($sections['teaching']))
+			$html .= $this->renderTeachingTable($sections['teaching']);
+		if (!empty($sections['reservations']))
+			$html .= $this->renderReservationTable($sections['reservations']);
+		if (!empty($sections['events']))
+			$html .= $this->renderEventTable($sections['events']);
+
+		if (empty($sections['teaching'])
+			&& empty($sections['reservations'])
+			&& empty($sections['events']))
+		{
+			$html .= '<p class="detail-empty">0 '
+				.$this->escape($this->phrase('global', 'termine')).'</p>';
+		}
+
+		if (defined('MAIL_LVPLAN'))
+		{
+			$html .= '<p>'.$this->phrase(
+				'lvplan',
+				'FragenZuLvPlan',
+				array(constant('MAIL_LVPLAN'))
+			).'</p>';
+		}
+
+		return $html.'</body></html>';
+	}
+
+	/**
+	 * Renders teaching-unit details.
+	 */
+	private function renderTeachingTable(array $events)
+	{
+		$html = '<table class="stdplan"><thead><tr>';
+		foreach (array(
+			array('lvplan', 'unr'),
+			array('lvaliste', 'lektor'),
+			array('lvplan', 'ort'),
+			array('lvaliste', 'lehrfach'),
+			array('global', 'bezeichnung'),
+			array('global', 'verband'),
+			array('lvplan', 'einheit'),
+			array('lvplan', 'info')
+		) as $heading)
+		{
+			$html .= '<th>'.$this->escape($this->phrase($heading[0], $heading[1])).'</th>';
+		}
+		$html .= '</tr></thead><tbody>';
+
+		foreach ($events as $index => $event)
+		{
+			$html .= '<tr class="liste'.(($index + 1) % 2).'">';
+			$html .= $this->cell($this->renderScalarLines(
+				isset($event->unr) ? $event->unr : array()
+			));
+			$html .= $this->cell($this->renderPeople(
+				isset($event->lektor) ? $event->lektor : array(),
+				'profile'
+			));
+			$html .= $this->cell($this->renderRooms($event));
+			$html .= $this->cell($this->renderSubjectValues($event, 'kurzbz'));
+			$html .= $this->cell($this->renderSubjectValues($event, 'bezeichnung'));
+			$html .= $this->cell($this->renderTeachingGroups($event, false));
+			$html .= $this->cell($this->renderTeachingGroups($event, true));
+			$html .= $this->cell($this->renderOldTempusNoticeTagNote($event));
+			$html .= '</tr>';
+		}
+
+		return $html.'</tbody></table>';
+	}
+
+	/**
+	 * Renders reservation details.
+	 */
+	private function renderReservationTable(array $events)
+	{
+		$html = '<h2>'.$this->escape($this->phrase('lvplan', 'reservierungen')).'</h2>';
+		$html .= '<table class="stdplan"><thead><tr>';
+		foreach (array(
+			array('global', 'titel'),
+			array('lvplan', 'ort'),
+			array('global', 'person'),
+			array('global', 'beschreibung'),
+			array('lvplan', 'reserviertVon')
+		) as $heading)
+		{
+			$html .= '<th>'.$this->escape($this->phrase($heading[0], $heading[1])).'</th>';
+		}
+		$html .= '</tr></thead><tbody>';
+
+		foreach ($events as $index => $event)
+		{
+			$html .= '<tr class="liste'.(($index + 1) % 2).'">';
+			$html .= $this->cell($this->escape($this->getScalar($event, 'titel')));
+			$html .= $this->cell($this->renderRooms($event));
+			$html .= $this->cell($this->renderParticipants($event));
+			$html .= $this->cell($this->renderText(
+				$this->getScalar($event, 'beschreibung')
+			));
+			$html .= $this->cell($this->renderCreator($event));
+			$html .= '</tr>';
+		}
+
+		return $html.'</tbody></table>';
+	}
+
+	/**
+	 * Renders non-teaching, non-reservation calendar events.
+	 */
+	private function renderEventTable(array $events)
+	{
+		$html = '<h2>'.$this->escape($this->phrase('global', 'termine')).'</h2>';
+		$html .= '<table class="stdplan"><thead><tr>';
+		foreach (array(
+			array('global', 'titel'),
+			array('lvplan', 'ort'),
+			array('ui', 'organisierende'),
+			array('ui', 'teilnehmende'),
+			array('global', 'beschreibung')
+		) as $heading)
+		{
+			$html .= '<th>'.$this->escape($this->phrase($heading[0], $heading[1])).'</th>';
+		}
+		$html .= '</tr></thead><tbody>';
+
+		foreach ($events as $index => $event)
+		{
+			$html .= '<tr class="liste'.(($index + 1) % 2).'">';
+			$html .= $this->cell($this->escape($this->getEventTitle($event)));
+			$html .= $this->cell($this->renderRooms($event));
+			$html .= $this->cell($this->renderPeople(
+				isset($event->lektor) ? $event->lektor : array(),
+				'mail'
+			));
+			$html .= $this->cell($this->renderParticipants($event));
+			$html .= $this->cell($this->renderText(
+				$this->getScalar($event, 'beschreibung')
+			));
+			$html .= '</tr>';
+		}
+
+		return $html.'</tbody></table>';
+	}
+
+	private function renderSubjectValues($event, $property)
+	{
+		$values = array();
+		if (isset($event->lehrfach_details) && is_array($event->lehrfach_details))
+		{
+			foreach ($event->lehrfach_details as $subject)
+			{
+				$value = $this->getNestedValue($subject, $property);
+				if ($value !== '')
+					$values[] = $value;
+			}
+		}
+
+		if (empty($values))
+		{
+			$fallback = $property === 'kurzbz'
+				? $this->getScalar($event, 'lehrfach')
+				: $this->getScalar($event, 'lehrfach_bez');
+			if ($fallback !== '')
+				$values[] = $fallback;
+		}
+
+		return $this->renderScalarLines($values);
+	}
+
+	private function renderTeachingGroups($event, $specialGroups)
+	{
+		$values = array();
+		if (isset($event->gruppe) && is_array($event->gruppe))
+		{
+			foreach ($event->gruppe as $group)
+			{
+				$groupCode = $this->getNestedValue($group, 'gruppe_kurzbz');
+				if ($specialGroups && $groupCode !== '')
+					$values[] = $groupCode;
+				elseif (!$specialGroups && $groupCode === '')
+				{
+					$designation = $this->getNestedValue($group, 'bezeichnung');
+					if ($designation !== '')
+						$values[] = $designation;
+				}
+			}
+		}
+
+		return $this->renderGroupLinks($values);
+	}
+
+	private function renderParticipants($event)
+	{
+		$parts = array();
+		$people = $this->renderPeople(
+			isset($event->teilnehmer_person) ? $event->teilnehmer_person : array(),
+			'mail'
+		);
+		if ($people !== '')
+			$parts[] = $people;
+
+		$groups = array();
+		if (isset($event->teilnehmer_gruppe) && is_array($event->teilnehmer_gruppe))
+		{
+			foreach ($event->teilnehmer_gruppe as $group)
+			{
+				$value = $this->getNestedValue($group, 'bezeichnung');
+				if ($value === '')
+					$value = $this->getNestedValue($group, 'gruppe_kurzbz');
+				if ($value !== '')
+					$groups[] = $value;
+			}
+		}
+		$groupLinks = $this->renderGroupLinks($groups);
+		if ($groupLinks !== '')
+			$parts[] = $groupLinks;
+
+		return implode('<br>', $parts);
+	}
+
+	private function renderCreator($event)
+	{
+		if (isset($event->created_by) && (is_array($event->created_by) || is_object($event->created_by)))
+			return $this->renderPeople(array($event->created_by), 'plain');
+
+		return $this->renderPeople(
+			isset($event->lektor) ? $event->lektor : array(),
+			'plain'
+		);
+	}
+
+	private function renderPeople(array $people, $linkType)
+	{
+		$values = array();
+		$seen = array();
+		foreach ($people as $person)
+		{
+			$uid = $this->getNestedValue($person, 'mitarbeiter_uid');
+			if ($uid === '')
+				$uid = $this->getNestedValue($person, 'uid');
+
+			$nameParts = array();
+			foreach (array('titelpre', 'vorname', 'nachname', 'titelpost') as $property)
+			{
+				$value = trim($this->getNestedValue($person, $property));
+				if ($value !== '')
+					$nameParts[] = $value;
+			}
+			$name = implode(' ', $nameParts);
+			if ($name === '')
+				$name = $uid !== '' ? $uid : $this->getNestedValue($person, 'kurzbz');
+			if ($name === '')
+				continue;
+
+			$key = $uid !== '' ? $uid : $name;
+			if (isset($seen[$key]))
+				continue;
+			$seen[$key] = true;
+
+			$label = $this->escape($name);
+			if ($linkType === 'profile' && $uid !== '')
+			{
+				$personalNumber = $this->getNestedValue($person, 'personalnummer');
+				$profileAllowed = $personalNumber === ''
+					|| !is_numeric($personalNumber)
+					|| (int)$personalNumber >= 0;
+				if ($profileAllowed)
+				$label = $this->link($this->getProfileUrl($uid), $label);
+			}
+			elseif ($linkType === 'mail' && $uid !== '' && defined('DOMAIN'))
+			{
+				$label = $this->link(
+					'mailto:'.$uid.'@'.constant('DOMAIN'),
+					$label
+				);
+			}
+
+			$values[] = $label;
+		}
+
+		return implode('<br>', $values);
+	}
+
+	private function renderRooms($event)
+	{
+		$values = array();
+		$seen = array();
+		if (isset($event->ort_details) && is_array($event->ort_details))
+		{
+			foreach ($event->ort_details as $room)
+			{
+				$code = $this->getNestedValue($room, 'ort_kurzbz');
+				if ($code === '' || isset($seen[$code]))
+					continue;
+				$seen[$code] = true;
+
+				$label = $this->escape($code);
+				$contentId = $this->getNestedValue($room, 'content_id');
+				$title = $this->getNestedValue($room, 'bezeichnung');
+				if ($contentId !== '')
+				$label = $this->link($this->getRoomUrl($contentId), $label, $title);
+				elseif ($title !== '')
+					$label = '<span title="'.$this->escape($title).'">'.$label.'</span>';
+
+				$values[] = $label;
+			}
+		}
+
+		if (isset($event->ort_kurzbz) && is_array($event->ort_kurzbz))
+		{
+			foreach ($event->ort_kurzbz as $code)
+			{
+				$code = is_scalar($code) ? (string)$code : '';
+				if ($code === '' || isset($seen[$code]))
+					continue;
+				$seen[$code] = true;
+				$values[] = $this->escape($code);
+			}
+		}
+
+		if (isset($event->locations) && is_array($event->locations))
+		{
+			foreach ($event->locations as $location)
+			{
+				$location = is_scalar($location) ? trim((string)$location) : '';
+				if ($location !== '' && !isset($seen['location:'.$location]))
+				{
+					$seen['location:'.$location] = true;
+					$values[] = $this->escape($location);
+				}
+			}
+		}
+
+		return implode('<br>', $values);
+	}
+
+	private function renderGroupLinks(array $groups)
+	{
+		$values = array();
+		foreach ($this->uniqueScalarValues($groups) as $group)
+		{
+			$label = $this->escape($group);
+			if (defined('DOMAIN'))
+			{
+				$label = $this->link(
+					'mailto:'.mb_strtolower($group).'@'.constant('DOMAIN'),
+					$label
+				);
+			}
+			$values[] = $label;
+		}
+
+		return implode('<br>', $values);
+	}
+
+	private function renderScalarLines($values)
+	{
+		if (!is_array($values))
+			$values = array($values);
+
+		$escaped = array_map(array($this, 'escape'), $this->uniqueScalarValues($values));
+		return implode('<br>', $escaped);
+	}
+
+	private function uniqueScalarValues(array $values)
+	{
+		$result = array();
+		$seen = array();
+		foreach ($values as $value)
+		{
+			if (!is_scalar($value))
+				continue;
+			$value = trim((string)$value);
+			if ($value === '' || isset($seen[$value]))
+				continue;
+			$seen[$value] = true;
+			$result[] = $value;
+		}
+
+		sort($result, SORT_STRING | SORT_FLAG_CASE);
+		return $result;
+	}
+
+	private function renderOldTempusNoticeTagNote($event)
+	{
+		if (empty($event->tags)) return null;
+
+		$parsedTags = $event->tags;
+		if (!is_array($event->tags)) 
+			$parsedTags = json_decode($event->tags, true);
+
+		foreach ($parsedTags as $tag)
+		{
+			if (isset($tag['typ_kurzbz']) && $tag['typ_kurzbz'] === 'hinweis' && isset($tag['insertvon']) && $tag['insertvon'] === 'oldToNewTempusMigration')
+				return $tag['notiz'] ?? null;
+		}
+
+		return null;
+	}
+
+	private function renderText($value)
+	{
+		return nl2br($this->escape($value), false);
+	}
+
+	private function getEventTitle($event)
+	{
+		foreach (array('titel', 'lehrfach_bez', 'lehrfach') as $property)
+		{
+			$value = trim($this->getScalar($event, $property));
+			if ($value !== '')
+				return $value;
+		}
+
+		return '';
+	}
+
+	private function getEventDateTime($event, $isoProperty, $dateProperty, $timeProperty)
+	{
+		$value = isset($event->{$isoProperty}) ? $event->{$isoProperty} : null;
+		if (($value === null || $value === '')
+			&& isset($event->{$dateProperty})
+			&& isset($event->{$timeProperty}))
+		{
+			$value = $event->{$dateProperty}.' '.$event->{$timeProperty};
+		}
+
+		if ($value === null || $value === '')
+			return null;
+
+		try
+		{
+			$date = is_numeric($value)
+				? new DateTime('@'.(int)$value)
+				: new DateTime($value, new DateTimeZone(self::TIMEZONE));
+			$date->setTimezone(new DateTimeZone(self::TIMEZONE));
+			return $date;
+		}
+		catch (Exception $exception)
+		{
+			return null;
+		}
+	}
+
+	private function normalizeTime($time)
+	{
+		$time = (string)$time;
+		if (preg_match('/^(\d{1,2}:\d{2}:\d{2})(?:\.\d+)?$/', $time, $matches))
+			return $matches[1];
+		if (preg_match('/^\d{1,2}:\d{2}$/', $time))
+			return $time.':00';
+
+		return $time;
+	}
+
+	private function formatDate($datum)
+	{
+		$date = DateTime::createFromFormat(
+			'!Y-m-d',
+			$datum,
+			new DateTimeZone(self::TIMEZONE)
+		);
+		return $date === false ? $datum : $date->format('d.m.Y');
+	}
+
+	private function getScalar($object, $property)
+	{
+		return isset($object->{$property}) && is_scalar($object->{$property})
+			? (string)$object->{$property}
+			: '';
+	}
+
+	private function getNestedValue($value, $property)
+	{
+		if (is_array($value) && isset($value[$property]) && is_scalar($value[$property]))
+			return (string)$value[$property];
+		if (is_object($value) && isset($value->{$property}) && is_scalar($value->{$property}))
+			return (string)$value->{$property};
+
+		return '';
+	}
+
+	private function cell($content)
+	{
+		return '<td class="detail-lines">'.$content.'</td>';
+	}
+
+	private function link($url, $escapedLabel, $title = '')
+	{
+		$html = '<a href="'.$this->escape($url).'"';
+		if ($title !== '')
+			$html .= ' title="'.$this->escape($title).'"';
+		return $html.'>'.$escapedLabel.'</a>';
+	}
+
+	private function getProfileUrl($uid)
+	{
+		return $this->getAppRoot().'cis/private/profile/index.php?'
+			.http_build_query(array('uid' => $uid), '', '&', PHP_QUERY_RFC3986);
+	}
+
+	private function getRoomUrl($contentId)
+	{
+		return $this->getAppRoot().'cms/content.php?'
+			.http_build_query(
+				array('content_id' => $contentId),
+				'',
+				'&',
+				PHP_QUERY_RFC3986
+			);
+	}
+
+	private function phrase($category, $phrase, array $parameters = array())
+	{
+		if (($category === 'global' && $phrase === 'termine')
+			|| ($category === 'ui'
+				&& in_array($phrase, array('organisierende', 'teilnehmende'), true)))
+		{
+			return $this->ci->p->t($category, $phrase, $parameters);
+		}
+
+		return $this->legacyPhrases->t($category.'/'.$phrase, $parameters);
+	}
+
+	private function escape($value)
+	{
+		return htmlspecialchars((string)$value, ENT_QUOTES | ENT_SUBSTITUTE, 'UTF-8');
+	}
+
+	private function getAppRoot()
+	{
+		return defined('APP_ROOT') ? rtrim(APP_ROOT, '/').'/' : '/';
+	}
+}

application/libraries/LvPlanHTMLLib.php

@@ -0,0 +1,864 @@
+<?php
+
+if (!defined('BASEPATH'))
+	exit('No direct script access allowed');
+
+class LvPlanHTMLLib
+{
+	const TIMEZONE = 'Europe/Vienna';
+	const DETAIL_WINDOW_NAME = 'Details';
+	const DETAIL_WINDOW_OPTIONS = 'height=320,width=550,left=0,top=0,hotkeys=0,resizable=yes,status=no,scrollbars=no,toolbar=no,location=no,menubar=no,dependent=yes';
+
+	CONST NOTICE_TAG_ICON = '📝';
+
+	private $ci;
+
+	public function __construct()
+	{
+		$this->ci =& get_instance();
+	}
+
+	/**
+	 * Builds a complete printable timetable document.
+	 *
+	 * @param int $begin First included date as Unix timestamp.
+	 * @param int $ende Last included date as Unix timestamp.
+	 * @param string $type Timetable type.
+	 * @param array $filters Type-specific filters.
+	 * @return string
+	 */
+	public function getContent($begin, $ende, $type, array $filters)
+	{
+		if (!in_array($type, array('student', 'lektor', 'verband', 'ort'), true))
+			throw new InvalidArgumentException('Unsupported timetable type');
+
+		if ($type === 'verband')
+			$events = $this->getVerbandEvents($begin, $ende, $filters);
+		elseif ($type === 'ort')
+			$events = $this->getRoomEvents($begin, $ende, $filters);
+		else
+			$events = $this->getPersonalEvents($begin, $ende, $type, $filters);
+
+		$hourRaster = $this->loadHourRaster();
+		$normalizedEvents = $this->normalizeEvents($events);
+		
+		return $this->renderDocument(
+			$begin,
+			$ende,
+			$type,
+			$filters,
+			$hourRaster,
+			$normalizedEvents
+		);
+	}
+
+	/**
+	 * @return array Personal plan events.
+	 */
+	private function getPersonalEvents($begin, $ende, $type, array $filters)
+	{
+		if (!isset($filters['uid']) || !is_string($filters['uid']) || $filters['uid'] === '')
+			throw new InvalidArgumentException('Missing personal timetable UID');
+
+		$uid = $filters['uid'];
+		$isLecturer = $type === 'lektor';
+		$this->ci->load->library('KalenderLib', array('uid' => $uid));
+
+		$startDate = $this->formatLocalDate($begin);
+		$endDate = $this->formatLocalDate($ende);
+
+		if ($isLecturer)
+		{
+			$events = $this->ci->kalenderlib
+				->getPlanForLecturerByLecturer($startDate, $endDate, $uid);
+		}
+		else
+		{
+			$events = $this->ci->kalenderlib
+				->getPlanForStudentByStudent($startDate, $endDate, $uid);
+		}
+
+		return is_array($events) ? $events : array();
+	}
+
+	/**
+	 * @return array Room plan events.
+	 */
+	private function getRoomEvents($begin, $ende, array $filters)
+	{
+		if (!isset($filters['ort_kurzbz'])
+			|| !is_string($filters['ort_kurzbz'])
+			|| $filters['ort_kurzbz'] === '')
+		{
+			throw new InvalidArgumentException('Missing room timetable filter');
+		}
+
+		$this->ci->load->library('KalenderLib', array('uid' => getAuthUID()));
+		$events = $this->ci->kalenderlib->getPlanForRoom(
+			$this->formatLocalDate($begin),
+			$this->formatLocalDate($ende),
+			$filters['ort_kurzbz']
+		);
+
+		return is_array($events) ? $events : array();
+	}
+
+	/**
+	 * @return array Lehrverband plan events.
+	 */
+	private function getVerbandEvents($begin, $ende, array $filters)
+	{
+		foreach (array('stg_kz', 'sem') as $name)
+		{
+			if (!array_key_exists($name, $filters))
+				throw new InvalidArgumentException('Missing Lehrverband filter: '.$name);
+		}
+
+		$this->ci->load->library('KalenderLib', array('uid' => getAuthUID()));
+		$events = $this->ci->kalenderlib->getPlanForVerband(
+			$this->formatLocalDate($begin),
+			$this->formatLocalDate($ende),
+			$filters['stg_kz'],
+			$filters['sem'],
+			isset($filters['ver']) ? $filters['ver'] : null,
+			isset($filters['grp']) ? $filters['grp'] : null
+		);
+
+		return is_array($events) ? $events : array();
+	}
+
+	/**
+	 * @return array Timetable-hour raster.
+	 */
+	private function loadHourRaster()
+	{
+		$this->ci->load->model('ressource/Stunde_model', 'StundeModel');
+		$result = $this->ci->StundeModel->execReadOnlyQuery(
+			'SELECT stunde, beginn, ende
+			FROM lehre.tbl_stunde
+			ORDER BY stunde'
+		);
+
+		if (isError($result))
+			throw new RuntimeException(getError($result));
+		if (!hasData($result))
+			return array();
+
+		$raster = array();
+		foreach (getData($result) as $hour)
+		{
+			$start = $this->timeToSeconds($hour->beginn);
+			$end = $this->timeToSeconds($hour->ende);
+
+			if ($start === null || $end === null || $end <= $start)
+				continue;
+
+			$raster[] = array(
+				'number' => (string)$hour->stunde,
+				'begin' => $start,
+				'end' => $end,
+				'begin_label' => substr((string)$hour->beginn, 0, 5),
+				'end_label' => substr((string)$hour->ende, 0, 5)
+			);
+		}
+
+		return $raster;
+	}
+
+	/**
+	 * @param array $events Events from KalenderLib.
+	 * @return array
+	 */
+	private function normalizeEvents(array $events)
+	{
+		$normalized = array();
+
+		foreach ($events as $event)
+		{
+			$start = $this->getEventDateTime($event, 'isostart', 'datum', 'beginn');
+			$end = $this->getEventDateTime($event, 'isoend', 'datum', 'ende');
+
+			if ($start === null || $end === null || $end <= $start)
+				continue;
+
+			$isReservation = isset($event->type) && $event->type === 'reservierung';
+			
+			$title = '';
+			if ($isReservation) {
+				$title = $this->getScalar($event, 'titel');
+			} else {
+				$title = $this->joinValue(isset($event->topic) ? $event->topic : '');
+			}
+
+			if ($title === '')
+				$title = $this->getScalar($event, 'lehrfach_bez');
+
+			$infoTag = $this->getOldTempusNoticeTag($event);
+			if (!empty($infoTag))
+			{
+				$title .= ' ' . self::NOTICE_TAG_ICON;
+			}
+
+			$normalized[] = array(
+				'start' => $start,
+				'end' => $end,
+				'date' => $start->format('Y-m-d'),
+				'title' => $title,
+				'location' => $this->joinValue(
+					isset($event->ort_kurzbz) ? $event->ort_kurzbz : '',
+					' / '
+				),
+				'detail_ort_kurzbz' => $this->getFirstScalarValue(
+					isset($event->ort_kurzbz) ? $event->ort_kurzbz : ''
+				),
+				'lecturers' => $this->getLecturers($event),
+				'participants' => $this->getParticipants($event),
+				'groups' => $this->getGroups($event),
+				'note' => $this->getEventNote($event, $isReservation),
+				'color' => $this->getColor($event),
+				'infoTagTitle' => !empty($infoTag) && isset($infoTag['notiz']) ? $infoTag['notiz'] : '',
+			);
+		}
+
+		usort($normalized, function ($first, $second) {
+			return $first['start']->getTimestamp() <=> $second['start']->getTimestamp();
+		});
+
+		return $normalized;
+	}
+
+	/**
+	 * Renders the complete HTML document.
+	 */
+	private function renderDocument(
+		$begin,
+		$ende,
+		$type,
+		array $filters,
+		array $hourRaster,
+		array $events
+	) {
+		$timezone = new DateTimeZone(self::TIMEZONE);
+		$rangeStart = (new DateTime('@'.$begin))->setTimezone($timezone)->setTime(0, 0, 0);
+		$rangeEnd = (new DateTime('@'.$ende))->setTimezone($timezone)->setTime(23, 59, 59);
+
+		$weeks = $this->buildWeeks($rangeStart, $rangeEnd, $hourRaster, $events);
+		$title = $this->getDocumentTitle($type, $filters);
+		$appRoot = $this->getAppRoot();
+
+		$html = '<!DOCTYPE html><html lang="de"><head><meta charset="UTF-8">';
+		$html .= '<meta name="viewport" content="width=device-width, initial-scale=1">';
+		$html .= '<title>'.$this->escape('Kalender').'</title>';
+		$html .= '<link rel="stylesheet" href="'.$this->escape($appRoot.'skin/style.css.php').'" type="text/css">';
+		$html .= '<link rel="stylesheet" media="print" href="'.$this->escape($appRoot.'skin/cis.css').'" type="text/css">';
+		$html .= '<link rel="stylesheet" media="print" href="'.$this->escape($appRoot.'skin/print.css').'" type="text/css">';
+		$html .= '<style>'.$this->getStyles().'</style></head>';
+		$html .= '<body id="inhalt"><h1>'.$this->escape($title).'</h1>';
+
+		foreach ($weeks as $week)
+			$html .= $this->renderWeek($week, $hourRaster, $type, $filters);
+
+		if (empty($weeks))
+			$html .= '<p>Keine Termine im gewählten Zeitraum.</p>';
+
+		$html .= '</body></html>';
+		return $html;
+	}
+
+	/**
+	 * Builds week/day/cell collections for rendering.
+	 */
+	private function buildWeeks(DateTime $rangeStart, DateTime $rangeEnd, array $raster, array $events)
+	{
+		$weeks = array();
+		$weekStart = clone $rangeStart;
+
+		while ($weekStart <= $rangeEnd)
+		{
+			$weekKey = $weekStart->format('Y-m-d');
+			$weekEnd = (clone $weekStart)->modify('+6 days');
+			$days = array();
+
+			for ($dayOffset = 0; $dayOffset < 7; $dayOffset++)
+			{
+				$date = (clone $weekStart)->modify('+'.$dayOffset.' days');
+				$days[$date->format('Y-m-d')] = array(
+					'date' => $date,
+					'cells' => array_fill(0, count($raster), array())
+				);
+			}
+
+			$weeks[$weekKey] = array(
+				'start' => clone $weekStart,
+				'end' => $weekEnd,
+				'days' => $days,
+				'outside' => array()
+			);
+
+			$weekStart->modify('+7 days');
+		}
+
+		foreach ($events as $event)
+		{
+			$eventWeek = clone $event['start'];
+			$eventWeek->modify('monday this week')->setTime(0, 0, 0);
+			$weekKey = $eventWeek->format('Y-m-d');
+			$dateKey = $event['date'];
+
+			if (!isset($weeks[$weekKey]['days'][$dateKey]))
+				continue;
+
+			$matchingSlots = $this->getMatchingSlots($event, $raster);
+			if (empty($matchingSlots))
+			{
+				$weeks[$weekKey]['outside'][] = $event;
+				continue;
+			}
+
+			foreach ($matchingSlots as $slot)
+				$weeks[$weekKey]['days'][$dateKey]['cells'][$slot][] = $event;
+		}
+
+		return array_values($weeks);
+	}
+
+	/**
+	 * @return array Raster indexes overlapping an event.
+	 */
+	private function getMatchingSlots(array $event, array $raster)
+	{
+		if ($event['start']->format('Y-m-d') !== $event['end']->format('Y-m-d'))
+			return array();
+
+		$start = $this->timeToSeconds($event['start']->format('H:i:s'));
+		$end = $this->timeToSeconds($event['end']->format('H:i:s'));
+		$matches = array();
+
+		foreach ($raster as $index => $hour)
+		{
+			if ($start < $hour['end'] && $end > $hour['begin'])
+				$matches[] = $index;
+		}
+
+		return $matches;
+	}
+
+	/**
+	 * Renders one printable week.
+	 */
+	private function renderWeek(array $week, array $raster, $type, array $filters)
+	{
+		$weekdayNames = array(
+			1 => 'Montag',
+			2 => 'Dienstag',
+			3 => 'Mittwoch',
+			4 => 'Donnerstag',
+			5 => 'Freitag',
+			6 => 'Samstag',
+			7 => 'Sonntag'
+		);
+		$html = '<div style="padding-top: 10px;" class="page-break-after">';
+		$html .= '<table class="stdplan" width="100%" border="0" cellpadding="1" cellspacing="1" name="Stundenplantabelle" align="center">';
+		$html .= '<thead><tr>';
+		$html .= '<th align="right">Stunde&nbsp;<br>Beginn&nbsp;<br>Ende&nbsp;</th>';
+
+		foreach ($raster as $hour)
+		{
+			$html .= '<th><div align="center">'.$this->escape($hour['number']).'<br>';
+			$html .= '&nbsp;'.$this->escape($hour['begin_label']).'&nbsp;<br>';
+			$html .= '&nbsp;'.$this->escape($hour['end_label']).'&nbsp;</div></th>';
+		}
+
+		$html .= '</tr></thead><tbody>';
+
+		foreach ($week['days'] as $day)
+		{
+			$weekday = (int)$day['date']->format('N');
+			$html .= '<tr><td>'.$weekdayNames[$weekday].'<br>';
+			$html .= $day['date']->format('j.M Y').'<br></td>';
+
+			foreach ($day['cells'] as $slotIndex => $events)
+			{
+				if (empty($events))
+				{
+					$html .= '<td valign="center" align="center"></td>';
+					continue;
+				}
+
+				$html .= '<td nowrap valign="top" align="center">';
+
+				$hourNumber = isset($raster[$slotIndex]['number'])
+					? $raster[$slotIndex]['number']
+					: null;
+				foreach ($events as $event)
+					$html .= $this->renderEvent(
+						$event,
+						$type,
+						false,
+						$filters,
+						$hourNumber
+					);
+				$html .= '</td>';
+			}
+
+			$html .= '</tr>';
+		}
+
+		$html .= '</tbody></table>';
+
+		if (!empty($week['outside']))
+		{
+			$html .= '<div class="outside"><h3>Termine außerhalb des Stundenrasters</h3>';
+			foreach ($week['outside'] as $event)
+			{
+				$html .= $this->renderEvent(
+					$event,
+					$type,
+					true,
+					$filters,
+					$this->getNearestHourNumber($event, $raster)
+				);
+			}
+			$html .= '</div>';
+		}
+
+		if ($type === 'ort')
+			$html .= $this->renderRoomReservationNotice($week, $filters);
+
+		return $html.'</div>';
+	}
+
+	/**
+	 * Renders the room reservation warning used by the legacy weekly plan.
+	 */
+	private function renderRoomReservationNotice(array $week, array $filters)
+	{
+		$requiredFilters = array(
+			'room_reservable',
+			'room_reservation_permitted',
+			'room_reservation_start',
+			'room_reservation_end',
+			'room_not_reservable_message',
+			'room_reservation_restricted_message'
+		);
+		foreach ($requiredFilters as $filter)
+		{
+			if (!array_key_exists($filter, $filters))
+				return '';
+		}
+
+		$weekEnd = (clone $week['end'])->modify('+1 day')->getTimestamp();
+		$canReserveInWeek = $filters['room_reservation_permitted']
+			&& $filters['room_reservable']
+			&& $weekEnd >= time()
+			&& $weekEnd >= $filters['room_reservation_start']
+			&& $week['start']->getTimestamp() <= $filters['room_reservation_end'];
+
+		if ($canReserveInWeek)
+			return '';
+
+		$message = $filters['room_reservation_permitted']
+			&& !$filters['room_reservable']
+			? $filters['room_not_reservable_message']
+			: $filters['room_reservation_restricted_message'];
+
+		return '<table><tr><td><br><span style="color: orange">'
+			.$this->escape($message)
+			.'</span></td></tr></table>';
+	}
+
+	/**
+	 * Renders an escaped event card.
+	 */
+	private function renderEvent(
+		array $event,
+		$type,
+		$showDate,
+		array $filters,
+		$hourNumber
+	) {
+		$style = $event['color'] !== ''
+			? ' style="background-color: #'.$event['color'].'; margin-bottom: 3px;"'
+			: '';
+		$html = '<div align="center"'.$style.'>';
+		$detailUrl = $this->buildDetailUrl($event, $type, $filters, $hourNumber);
+
+		$linkTitle = $this->escape($event['note']);
+		$infoTagTitle = isset($event['infoTagTitle']) && $event['infoTagTitle'] !== ''
+			? $event['infoTagTitle']
+			: null;
+		if ($infoTagTitle !== null)
+		{
+			$linkTitle = $this->escape($infoTagTitle);
+		}
+
+		$html .= '<a class="stpl_detail" title="'.$linkTitle.'"';
+		if ($detailUrl !== null)
+		{
+			$onclick = 'window.open('
+				.$this->encodeJavaScriptString($detailUrl).','
+				.$this->encodeJavaScriptString(self::DETAIL_WINDOW_NAME).','
+				.$this->encodeJavaScriptString(self::DETAIL_WINDOW_OPTIONS)
+				.');return false;';
+			$html .= ' href="'.$this->escape($detailUrl).'"';
+			$html .= ' target="'.self::DETAIL_WINDOW_NAME.'"';
+			$html .= ' onclick="'.$this->escape($onclick).'"';
+		}
+		$html .= '>';
+
+		if ($showDate)
+			$html .= $event['start']->format('d.m.Y H:i').'–'.$event['end']->format('H:i').'<br>';
+
+		$html .= $this->escape($event['title']);
+
+		if (($type === 'lektor' || $type === 'verband' || $type === 'ort')
+			&& $event['groups'] !== '')
+			$html .= '<br>'.$this->renderLines($event['groups']);
+		if ($type !== 'lektor' && $type !== 'ort' && $event['lecturers'] !== '')
+			$html .= '<br>'.$this->renderLines($event['lecturers']);
+		if ($type === 'ort' && $event['participants'] !== '')
+			$html .= '<br>'.$this->renderLines($event['participants']);
+		if ($event['location'] !== '' && $type !== 'ort')
+			$html .= '<br>'.$this->escape($event['location']);
+		if ($event['note'] !== '' && $this->shouldShowNotes())
+			$html .= '<br>'.$this->escape($event['note']);
+
+		return $html.'</a></div>';
+	}
+
+	/**
+	 * Builds the URL consumed by the legacy timetable detail popup.
+	 */
+	private function buildDetailUrl(array $event, $type, array $filters, $hourNumber)
+	{
+		if ($hourNumber === null || !preg_match('/^\d+$/', (string)$hourNumber))
+			return null;
+
+		$uid = isset($filters['uid']) && $filters['uid'] !== ''
+			? $filters['uid']
+			: getAuthUID();
+		$room = $type === 'ort' && isset($filters['ort_kurzbz'])
+			? $filters['ort_kurzbz']
+			: $event['detail_ort_kurzbz'];
+		$parameters = array(
+			'type' => $type,
+			'datum' => $event['date'],
+			'stunde' => (string)$hourNumber,
+			'pers_uid' => $uid,
+			'stg_kz' => isset($filters['stg_kz']) ? $filters['stg_kz'] : '',
+			'sem' => isset($filters['sem']) ? $filters['sem'] : '',
+			'ver' => isset($filters['ver']) && $filters['ver'] !== null
+				? $filters['ver']
+				: '',
+			'grp' => isset($filters['grp']) && $filters['grp'] !== null
+				? $filters['grp']
+				: '',
+			'ort_kurzbz' => $room
+		);
+
+		return $this->getAppRoot().'index.ci.php/lvplan/html/detail?'
+			.http_build_query($parameters, '', '&', PHP_QUERY_RFC3986);
+	}
+
+	/**
+	 * Returns the hour whose configured start is closest to the event start.
+	 */
+	private function getNearestHourNumber(array $event, array $raster)
+	{
+		if (empty($raster))
+			return null;
+
+		$eventStart = $this->timeToSeconds($event['start']->format('H:i:s'));
+		if ($eventStart === null)
+			return null;
+
+		$nearestNumber = null;
+		$nearestDistance = null;
+		foreach ($raster as $hour)
+		{
+			$distance = abs($eventStart - $hour['begin']);
+			if ($nearestDistance === null || $distance < $nearestDistance)
+			{
+				$nearestDistance = $distance;
+				$nearestNumber = $hour['number'];
+			}
+		}
+
+		return $nearestNumber;
+	}
+
+	private function getDocumentTitle($type, array $filters)
+	{
+		//return 'Kalender';
+		if ($type === 'ort')
+		{
+			$title = 'Ort: '.$filters['ort_kurzbz'];
+			if (isset($filters['bezeichnung']) && $filters['bezeichnung'] !== '')
+				$title .= ' - '.$filters['bezeichnung'];
+			return $title;
+		}
+
+		if ($type === 'verband')
+		{
+			$studiengang = isset($filters['stg_kurzbz'])
+				&& $filters['stg_kurzbz'] !== ''
+				? $filters['stg_kurzbz']
+				: $filters['stg_kz'];
+			$title = 'Lehrverband: '.$studiengang.'-'.$filters['sem'];
+
+			if (isset($filters['ver']) && $filters['ver'] !== null)
+				$title .= $filters['ver'];
+			else 
+				$title .= 0;
+			
+			if (isset($filters['grp']) && $filters['grp'] !== null)
+				$title .= $filters['grp'];
+			else 
+				$title .= 0;
+			
+			return $title;
+		}
+
+		if ($type === 'lektor')
+		{
+			$name = isset($filters['full_name']) && $filters['full_name'] !== ''
+				? $filters['full_name']
+				: $filters['uid'];
+			return 'Lektor: '.$name;
+		}
+
+		return 'Student: '.$filters['uid'];
+	}
+
+	private function getEventDateTime($event, $isoProperty, $dateProperty, $timeProperty)
+	{
+		$value = isset($event->{$isoProperty}) ? $event->{$isoProperty} : null;
+		if (($value === null || $value === '')
+			&& isset($event->{$dateProperty})
+			&& isset($event->{$timeProperty}))
+		{
+			$value = $event->{$dateProperty}.' '.$event->{$timeProperty};
+		}
+
+		if ($value === null || $value === '')
+			return null;
+
+		try
+		{
+			$date = is_numeric($value) ? new DateTime('@'.(int)$value) : new DateTime($value);
+			$date->setTimezone(new DateTimeZone(self::TIMEZONE));
+			return $date;
+		}
+		catch (Exception $e)
+		{
+			return null;
+		}
+	}
+
+	private function getLecturers($event)
+	{
+		$values = array();
+		if (!isset($event->lektor) || !is_array($event->lektor))
+			return '';
+
+		foreach ($event->lektor as $lecturer)
+		{
+			$value = $this->getNestedValue($lecturer, array('kurzbz', 'mitarbeiter_uid'));
+			if ($value !== '')
+				$values[] = $value;
+		}
+
+		sort($values, SORT_STRING | SORT_FLAG_CASE);
+
+		return implode(', ', array_unique($values));
+	}
+
+	private function getParticipants($event)
+	{
+		$values = array();
+		if (!isset($event->teilnehmer_person) || !is_array($event->teilnehmer_person))
+			return '';
+
+		foreach ($event->teilnehmer_person as $participant)
+		{
+			$value = $this->getNestedValue($participant, array('kurzbz', 'student_uid'));
+			if ($value !== '')
+				$values[] = $value;
+		}
+
+		sort($values, SORT_STRING | SORT_FLAG_CASE);
+
+		return implode(', ', array_unique($values));
+	}
+
+	private function getGroups($event)
+	{
+		$values = array();
+		foreach (array('teilnehmer_gruppe', 'gruppe') as $property)
+		{
+			if (!isset($event->{$property}) || !is_array($event->{$property}))
+				continue;
+
+			foreach ($event->{$property} as $group)
+			{
+				$value = $this->getNestedValue(
+					$group,
+					array('bezeichnung', 'kuerzel', 'gruppe_kurzbz')
+				);
+				if ($value !== '')
+					$values[] = $value;
+			}
+		}
+
+		sort($values, SORT_STRING | SORT_FLAG_CASE);
+		
+		return implode(', ', array_unique($values));
+	}
+
+	private function getEventNote($event, $isReservation)
+	{
+		$note = $this->getScalar($event, 'beschreibung');
+		if ($note === '')
+			$note = $this->getScalar($event, 'anmerkung');
+		if ($note === '' && !$isReservation)
+			$note = $this->getScalar($event, 'titel');
+		return $note;
+	}
+
+	private function getColor($event)
+	{
+		$color = ltrim($this->getScalar($event, 'farbe'), '#');
+		return preg_match('/^[0-9a-fA-F]{6}$/', $color) ? strtoupper($color) : '';
+	}
+
+	private function getNestedValue($value, array $properties)
+	{
+		foreach ($properties as $property)
+		{
+			if (is_array($value) && isset($value[$property]))
+				return (string)$value[$property];
+			if (is_object($value) && isset($value->{$property}))
+				return (string)$value->{$property};
+		}
+
+		return is_scalar($value) ? (string)$value : '';
+	}
+
+	private function getScalar($event, $property)
+	{
+		return isset($event->{$property}) && is_scalar($event->{$property})
+			? (string)$event->{$property}
+			: '';
+	}
+
+	private function getFirstScalarValue($value)
+	{
+		if (is_scalar($value))
+			return (string)$value;
+		if (!is_array($value))
+			return '';
+
+		foreach ($value as $item)
+		{
+			if (is_scalar($item) && (string)$item !== '')
+				return (string)$item;
+		}
+
+		return '';
+	}
+
+	private function joinValue($value, $separator = ', ')
+	{
+		if (!is_array($value))
+			return is_scalar($value) ? (string)$value : '';
+
+		$values = array();
+		foreach ($value as $item)
+		{
+			if (is_scalar($item) && (string)$item !== '')
+				$values[] = (string)$item;
+		}
+
+		return implode($separator, array_unique($values));
+	}
+
+	private function timeToSeconds($time)
+	{
+		if (!preg_match('/^(\d{1,2}):(\d{2})(?::(\d{2}))?$/', (string)$time, $matches))
+			return null;
+
+		$hours = (int)$matches[1];
+		$minutes = (int)$matches[2];
+		$seconds = isset($matches[3]) ? (int)$matches[3] : 0;
+
+		if ($hours > 23 || $minutes > 59 || $seconds > 59)
+			return null;
+
+		return $hours * 3600 + $minutes * 60 + $seconds;
+	}
+
+	private function formatLocalDate($timestamp)
+	{
+		$date = new DateTime('@'.(int)$timestamp);
+		$date->setTimezone(new DateTimeZone(self::TIMEZONE));
+		return $date->format('Y-m-d');
+	}
+
+	private function escape($value)
+	{
+		return htmlspecialchars((string)$value, ENT_QUOTES | ENT_SUBSTITUTE, 'UTF-8');
+	}
+
+	private function encodeJavaScriptString($value)
+	{
+		return json_encode(
+			(string)$value,
+			JSON_HEX_TAG | JSON_HEX_AMP | JSON_HEX_APOS | JSON_HEX_QUOT
+		);
+	}
+
+	private function renderLines($value)
+	{
+		$lines = array_map('trim', explode(', ', (string)$value));
+		$lines = array_filter($lines, function ($line) {
+			return $line !== '';
+		});
+		$lines = array_map(array($this, 'escape'), $lines);
+
+		return implode('<br>', $lines);
+	}
+
+	private function getAppRoot()
+	{
+		return defined('APP_ROOT') ? rtrim(APP_ROOT, '/').'/' : '/';
+	}
+
+	private function shouldShowNotes()
+	{
+		return !defined('LVPLAN_ANMERKUNG_ANZEIGEN') || LVPLAN_ANMERKUNG_ANZEIGEN;
+	}
+
+	private function getStyles()
+	{
+		return '@page{size:landscape;margin:10mm}'
+			.'.outside{margin-top:10px}.outside>div{display:inline-block;vertical-align:top;min-width:180px;margin:0 3px 3px 0;padding:3px}'
+			.'@media print{.outside>div{break-inside:avoid}}';
+	}
+
+	private function getOldTempusNoticeTag($event)
+	{
+		if (empty($event->tags)) return null;
+
+		$parsedTags = $event->tags;
+		if (!is_array($event->tags)) 
+			$parsedTags = json_decode($event->tags, true);
+
+		foreach ($parsedTags as $tag)
+		{
+			if (isset($tag['typ_kurzbz']) && $tag['typ_kurzbz'] === 'hinweis' && isset($tag['insertvon']) && $tag['insertvon'] === 'oldToNewTempusMigration')
+				return $tag;
+		}
+
+		return null;
+	}
+}

application/libraries/LvPlanICALLib.php

@@ -0,0 +1,449 @@
+<?php
+
+if (!defined('BASEPATH'))
+	exit('No direct script access allowed');
+
+class LvPlanICALLib
+{
+	const CATEGORY_TIMETABLE = 'Stundenplan';
+	const CATEGORY_EXAM = 'StundenplanExam';
+	const CATEGORY_REMOTE = 'StundenplanRemote';
+
+	const ICON_EXAM = '📝';
+	const ICON_REMOTE = '📍';
+	const ICON_RESERVATION = '📌';
+
+	private $ci;
+
+	public function __construct()
+	{
+		$this->ci =& get_instance();
+	}
+
+	/**
+	 * Builds complete iCalendar content for a user.
+	 *
+	 * If no type is given, the user's role is inferred for subscription feeds.
+	 * Downloads pass the type explicitly so dual-role users receive the selected
+	 * timetable.
+	 *
+	 * @param string $uid User UID.
+	 * @param int $begin First included date as Unix timestamp.
+	 * @param int $ende Last included date as Unix timestamp.
+	 * @param string|null $type Timetable type (student, lektor, ort or verband).
+	 * @param int $version iCalendar major version (1 or 2).
+	 * @param string|null $ortKurzbz Room identifier for room plans.
+	 * @param array|null $verbandFilters Lehrverband filters.
+	 * @param string|null $calendarName Display name for calendar subscriptions.
+	 * @return string
+	 */
+	public function getContent(
+		$uid,
+		$begin,
+		$ende,
+		$type = null,
+		$version = 2,
+		$ortKurzbz = null,
+		$verbandFilters = null,
+		$calendarName = null
+	) {
+		if (!in_array($version, array(1, 2), true))
+			throw new InvalidArgumentException('Unsupported iCalendar version');
+		if ($type !== null && !in_array($type, array('student', 'lektor', 'ort', 'verband'), true))
+			throw new InvalidArgumentException('Unsupported timetable type');
+		if ($type === 'ort' && (!is_string($ortKurzbz) || $ortKurzbz === ''))
+			throw new InvalidArgumentException('Missing room timetable filter');
+		if ($type === 'verband'
+			&& (!is_array($verbandFilters)
+				|| !array_key_exists('stg_kz', $verbandFilters)
+				|| !array_key_exists('sem', $verbandFilters)))
+		{
+			throw new InvalidArgumentException('Missing Lehrverband timetable filters');
+		}
+
+		$this->ci->load->library('KalenderLib', array('uid' => $uid));
+
+		if ($type === null)
+		{
+			$this->ci->load->model('ressource/Mitarbeiter_model', 'MitarbeiterModel');
+			$isLecturerResult = $this->ci->MitarbeiterModel->isMitarbeiter($uid);
+			$isLecturer = isSuccess($isLecturerResult) && getData($isLecturerResult) === true;
+		}
+		else
+		{
+			$isLecturer = $type === 'lektor';
+		}
+
+		$startDate = date('Y-m-d', $begin);
+		// KalenderLib uses an exclusive end date; $ende is inclusive here.
+		$endDate = date('Y-m-d', strtotime('+1 day', $ende));
+
+		if ($type === 'verband')
+		{
+			$events = $this->ci->kalenderlib->getPlanForVerband(
+				$startDate,
+				$endDate,
+				$verbandFilters['stg_kz'],
+				$verbandFilters['sem'],
+				isset($verbandFilters['ver']) ? $verbandFilters['ver'] : null,
+				isset($verbandFilters['grp']) ? $verbandFilters['grp'] : null
+			);
+		}
+		elseif ($type === 'ort')
+		{
+			$events = $this->ci->kalenderlib
+				->getPlanForRoom($startDate, $endDate, $ortKurzbz);
+		}
+		elseif ($isLecturer)
+		{
+			$events = $this->ci->kalenderlib
+				->getPlanForLecturerByLecturer($startDate, $endDate, $uid);
+		}
+		else
+		{
+			$events = $this->ci->kalenderlib
+				->getPlanForStudentByStudent($startDate, $endDate, $uid);
+		}
+
+		if (!is_array($events))
+			$events = array();
+
+		$content = $this->buildCalendarHeader($version, $calendarName);
+
+		foreach ($events as $event)
+			$content .= $this->buildEvent($event);
+
+		return $content.$this->buildICalLine('END', 'VCALENDAR');
+	}
+
+	private function buildCalendarHeader($version, $calendarName = null)
+	{
+		$productId = defined('CAMPUS_NAME') && CAMPUS_NAME !== ''
+			? CAMPUS_NAME
+			: 'FHComplete';
+
+		$header = $this->buildICalLine('BEGIN', 'VCALENDAR')
+			.$this->buildICalLine('VERSION', $version.'.0')
+			.$this->buildICalTextLine('PRODID', $productId);
+
+		if (is_string($calendarName) && $calendarName !== '')
+		{
+			$header .= $this->buildICalTextLine('NAME', $calendarName);
+			$header .= $this->buildICalTextLine('X-WR-CALNAME', $calendarName);
+		}
+
+		return $header
+			.$this->buildICalLine('BEGIN', 'VTIMEZONE')
+			.$this->buildICalLine('TZID', 'Europe/Vienna')
+			.$this->buildICalLine('BEGIN', 'DAYLIGHT')
+			.$this->buildICalLine('TZOFFSETFROM', '+0100')
+			.$this->buildICalLine('RRULE', 'FREQ=YEARLY;BYMONTH=3;BYDAY=-1SU')
+			.$this->buildICalLine('DTSTART', '19810329T020000')
+			.$this->buildICalLine('TZNAME', 'GMT+02:00')
+			.$this->buildICalLine('TZOFFSETTO', '+0200')
+			.$this->buildICalLine('END', 'DAYLIGHT')
+			.$this->buildICalLine('BEGIN', 'STANDARD')
+			.$this->buildICalLine('TZOFFSETFROM', '+0200')
+			.$this->buildICalLine('RRULE', 'FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU')
+			.$this->buildICalLine('DTSTART', '19961027T030000')
+			.$this->buildICalLine('TZNAME', 'GMT+01:00')
+			.$this->buildICalLine('TZOFFSETTO', '+0100')
+			.$this->buildICalLine('END', 'STANDARD')
+			.$this->buildICalLine('END', 'VTIMEZONE');
+	}
+
+	private function buildEvent($event)
+	{
+		$isReservation = $event->type === 'reservierung';
+
+		$summaryIcon = '';
+		$summary = $this->getSummary($event);
+		$description = $this->getDescription($event);
+
+		$category = self::CATEGORY_TIMETABLE;
+		if ($event->type === 'lehreinheit')
+		{
+			if ($event->lehrform === 'EXAM')
+			{
+				$summaryIcon = self::ICON_EXAM;
+				$category = self::CATEGORY_EXAM;
+			}
+			elseif (!isset($event->ko_ort_kurzbz) || $event->ko_ort_kurzbz === '')
+			{
+				$summaryIcon = self::ICON_REMOTE;
+				$category = self::CATEGORY_REMOTE;
+			}
+		}
+		elseif ($event->type === 'reservierung'
+			&& (!isset($event->ko_ort_kurzbz) || $event->ko_ort_kurzbz === ''))
+		{
+			$summaryIcon = self::ICON_RESERVATION;
+			$category = self::CATEGORY_REMOTE;
+		}
+
+		if ($summaryIcon !== '')
+			$summary = $summaryIcon.' '.$summary;
+
+		$startDate = $this->formatICalLocalDateTime($event->isostart);
+		$endDate = $this->formatICalLocalDateTime($event->isoend);
+		$lastModified = $this->formatICalUtcDateTime(
+			isset($event->updateamum) ? $event->updateamum : null
+		);
+		$dtStamp = $lastModified ?: $this->formatICalUtcDateTime($event->isostart);
+
+		if ($dtStamp === null)
+			$dtStamp = '19700101T000000Z';
+
+		$fragment = $this->buildICalLine('BEGIN', 'VEVENT')
+			.$this->buildICalTextLine('UID', $event->eindeutige_kalender_gruppen_id)
+			.$this->buildICalLine('SEQUENCE', (int)$event->kalender_id)
+			.$this->buildICalTextLine('SUMMARY', $summary)
+			.$this->buildICalTextLine('DESCRIPTION', $description)
+			.$this->buildICalTextLine('LOCATION', $this->joinValues($event->ort_kurzbz))
+			.$this->buildICalTextLine('CATEGORIES', $category)
+			.$this->buildICalLine('DTSTART', $startDate, array('TZID' => 'Europe/Vienna'))
+			.$this->buildICalLine('DTEND', $endDate, array('TZID' => 'Europe/Vienna'));
+
+		if ($lastModified !== null)
+			$fragment .= $this->buildICalLine('LAST-MODIFIED', $lastModified);
+
+		return $fragment
+			.$this->buildICalLine('DTSTAMP', $dtStamp)
+			.$this->buildICalLine('END', 'VEVENT');
+	}
+
+	/**
+	 * @param object $event Calendar event.
+	 * @return string Event summary.
+	 */
+	private function getSummary($event)
+	{
+		if (isset($event->type) && $event->type === 'reservierung')
+		{
+			return isset($event->titel) ? $event->titel : '';
+		}
+
+		$subject = isset($event->lehrfach_bez) ? $event->lehrfach_bez : '';
+
+		if ($subject === '')
+			$subject = $this->joinValues(isset($event->topic) ? $event->topic : array());
+
+		return $subject;
+	}
+
+	/**
+	 * @param object $event Calendar event.
+	 * @return string Event description.
+	 */
+	private function getDescription($event)
+	{
+		$isReservation = isset($event->type) && $event->type === 'reservierung';
+		$parts = array();
+		$subject = $isReservation && isset($event->lehrfach_bez)
+			? $event->lehrfach_bez
+			: '';
+
+		if ($subject !== '')
+			$parts[] = $this->ci->p->t('global', 'lehrfach').': '.$subject;
+
+		if ($isReservation)
+		{
+			$participants = $this->getParticipants($event);
+
+			if ($participants !== '')
+				$parts[] = $this->ci->p->t('ui', 'teilnehmende').': '.$participants;
+		}
+		else
+		{
+			$lecturers = $this->getLecturers($event);
+
+			if ($lecturers !== '')
+				$parts[] = $this->ci->p->t('lehre', 'lektorInnen').': '.$lecturers;
+		}
+
+		$groups = $this->getGroups($event);
+		if ($groups !== '')
+			$parts[] = $this->ci->p->t('global', 'gruppen').': '.$groups;
+
+		$description = isset($event->beschreibung) ? $event->beschreibung : '';
+		if ($description !== '')
+			$parts[] = $this->ci->p->t('global', 'beschreibung').': '.$description;
+
+		return implode("\r\n", $parts);
+	}
+
+	private function joinValues($value)
+	{
+		return is_array($value) ? implode(', ', $value) : (string)$value;
+	}
+
+	private function buildICalTextLine($name, $value, array $parameters = array())
+	{
+		return $this->buildICalLine($name, $this->escapeICalText($value), $parameters);
+	}
+
+	private function buildICalLine($name, $value, array $parameters = array())
+	{
+		$line = strtoupper($name);
+
+		foreach ($parameters as $parameterName => $parameterValue)
+		{
+			$parameterValues = is_array($parameterValue) ? $parameterValue : array($parameterValue);
+			$escapedValues = array();
+
+			foreach ($parameterValues as $singleParameterValue)
+				$escapedValues[] = $this->escapeICalParameterValue($singleParameterValue);
+
+			$line .= ';'.strtoupper($parameterName).'='.implode(',', $escapedValues);
+		}
+
+		return $this->foldICalLine($line.':'.(string)$value);
+	}
+
+	private function foldICalLine($line)
+	{
+		$line = (string)$line;
+		$folded = '';
+
+		while (strlen($line) > 75)
+		{
+			$part = mb_strcut($line, 0, 75, 'UTF-8');
+			$folded .= $part."\r\n";
+			$line = ' '.mb_strcut($line, strlen($part), strlen($line) - strlen($part), 'UTF-8');
+		}
+
+		return $folded.$line."\r\n";
+	}
+
+	private function escapeICalText($value)
+	{
+		$value = (string)$value;
+		$value = str_replace('\\', '\\\\', $value);
+		$value = str_replace(array("\r\n", "\r", "\n"), '\\n', $value);
+		return str_replace(array(';', ','), array('\\;', '\\,'), $value);
+	}
+
+	private function escapeICalParameterValue($value)
+	{
+		$value = (string)$value;
+		$value = str_replace(array('\\', '"', "\r", "\n"), array('\\\\', '\\"', '', ''), $value);
+
+		if (preg_match('/[;:,]/', $value))
+			return '"'.$value.'"';
+
+		return $value;
+	}
+
+	private function formatICalLocalDateTime($dateTime)
+	{
+		$dateTime = $this->createDateTime($dateTime);
+		if ($dateTime === null)
+			return null;
+
+		$dateTime->setTimezone(new DateTimeZone('Europe/Vienna'));
+		return $dateTime->format('Ymd\THis');
+	}
+
+	private function formatICalUtcDateTime($dateTime)
+	{
+		$dateTime = $this->createDateTime($dateTime);
+		if ($dateTime === null)
+			return null;
+
+		$dateTime->setTimezone(new DateTimeZone('UTC'));
+		return $dateTime->format('Ymd\THis\Z');
+	}
+
+	private function createDateTime($dateTime)
+	{
+		if ($dateTime instanceof DateTime)
+			return clone $dateTime;
+
+		if ($dateTime === null || $dateTime === '')
+			return null;
+
+		try
+		{
+			if (is_numeric($dateTime))
+				return new DateTime('@'.(int)$dateTime);
+
+			return new DateTime($dateTime);
+		}
+		catch (Exception $e)
+		{
+			return null;
+		}
+	}
+
+		/**
+	 * @param object $event Calendar event.
+	 * @return string Participant group labels.
+	 */
+	private function getGroups($event)
+	{
+		$groups = array();
+
+		if (isset($event->gruppe) && is_array($event->gruppe))
+		{
+			foreach ($event->gruppe as $group)
+			{
+				if (isset($group['bezeichnung']) && $group['bezeichnung'] !== '')
+					$groups[] = $group['bezeichnung'];
+			}
+		}
+
+		if (isset($event->teilnehmer_gruppe) && is_array($event->teilnehmer_gruppe))
+		{
+			foreach ($event->teilnehmer_gruppe as $group)
+			{
+				if (isset($group['gruppe_kurzbz']) && $group['gruppe_kurzbz'] !== '')
+					$groups[] = $group['gruppe_kurzbz'];
+			}
+		}
+
+		sort($groups, SORT_NATURAL | SORT_FLAG_CASE);
+
+		return implode(',', array_unique($groups));
+	}
+
+	/**
+	 * @param object $event Calendar event.
+	 * @return string Lecturer abbreviations.
+	 */
+	private function getLecturers($event)
+	{
+		$lecturers = array();
+
+		if (isset($event->lektor) && is_array($event->lektor))
+		{
+			foreach ($event->lektor as $lecturer)
+			{
+				if (isset($lecturer['kurzbz']) && $lecturer['kurzbz'] !== '')
+					$lecturers[] = $lecturer['kurzbz'];
+			}
+		}
+
+		sort($lecturers, SORT_NATURAL | SORT_FLAG_CASE);
+
+		return implode(' / ', array_unique($lecturers));
+	}
+
+	private function getParticipants($event)
+	{
+		$values = array();
+		if (!isset($event->teilnehmer_person) || !is_array($event->teilnehmer_person))
+			return '';
+
+		foreach ($event->teilnehmer_person as $participant)
+		{
+			$value = $participant['vorname'] . ' ' . $participant['nachname'];
+
+			if ($value !== '')
+				$values[] = $value;
+		}
+
+		sort($values, SORT_NATURAL | SORT_FLAG_CASE);
+
+		return implode(', ', array_unique($values));
+	}
+}

application/libraries/PermissionLib.php

@@ -50,6 +50,7 @@ class PermissionLib
 	const LOGINAS_PERSONIDS_BLACKLIST = 'permission_loginas_personids_blacklist';
 
 	private $_ci; // CI instance
+	private $access_rights; // current users access rights
 	private static $bb; // benutzerberechtigung
 
 	/**
@@ -61,6 +62,8 @@ class PermissionLib
 		// Loads CI instance
 		$this->_ci =& get_instance();
 
+		$this->access_rights = null;
+
 		$this->_ci->config->load('permission'); // Loads permission configuration
 
 		// If it's NOT called from command line
@@ -69,8 +72,10 @@ class PermissionLib
 			// API Caller rights initialization
 			$authObj = $this->_ci->authlib->getAuthObj();
 			self::$bb = new benutzerberechtigung();
-			if ($authObj)
+			if ($authObj) {
 				self::$bb->getBerechtigungen($authObj->{AuthLib::AO_USERNAME});
+				$this->access_rights = self::$bb->berechtigungen;
+			}
 		}
 	}
 
@@ -340,6 +345,16 @@ class PermissionLib
         }
     }
 
+	/**
+	 * Returns the access rights for the current user
+	 *
+	 * @return array|null
+	 */
+	public function getAccessRights()
+	{
+		return $this->access_rights;
+	}
+
 	//------------------------------------------------------------------------------------------------------------------
 	// Private methods
 

application/libraries/ProfilLib.php

@@ -263,6 +263,59 @@ class ProfilLib{
 			$element->mailto = "mailto:" . $element->gruppe_kurzbz . "@" . DOMAIN;
 			return $element;
 		}, $mailverteiler_res);
+
+		$this->ci->load->model("crm/Student_model", "StudentModel");
+		$this->ci->StudentModel->addJoin("tbl_benutzer", "tbl_benutzer.uid = tbl_student.student_uid");
+		$this->ci->StudentModel->addJoin("tbl_person", "tbl_benutzer.person_id = tbl_person.person_id");
+		$this->ci->StudentModel->addJoin("tbl_studiengang", "tbl_student.studiengang_kz = tbl_studiengang.studiengang_kz");
+		$this->ci->StudentModel->addSelect("matr_nr, semester, verband, gruppe, kurzbzlang");
+
+		$studentResult = $this->ci->StudentModel->loadWhere(["student_uid" => $uid]);
+		if (isError($studentResult)) {
+			return error(getData($studentResult));
+		}
+
+		$studentResultData = getData($studentResult);
+		$studentData = null;
+		if (is_array($studentResultData) && count($studentResultData)) {
+			$studentData = $studentResultData[0];
+		}
+
+		if ($studentData && $studentData->matr_nr) {
+			$this->ci->load->library("phrasesLib", ["profil"], "phrases");
+			$standardCourseVerteiler = trim($studentData->kurzbzlang) . "_STD";
+			$mailverteiler_res[] = [
+				"beschreibung" => $this->ci->phrases->t('profil', 'alleStudentenVon') . " " . $standardCourseVerteiler,
+				"gruppe_kurzbz" => $standardCourseVerteiler,
+				"mailto" => "mailto:" . strtolower($standardCourseVerteiler) . "@" . DOMAIN,
+			];
+
+			$semesterVerteiler = trim($studentData->kurzbzlang) . trim($studentData->semester);
+			$mailverteiler_res[] = [
+				"beschreibung" => $this->ci->phrases->t('profil', 'alleStudentenVon') . " " . $semesterVerteiler,
+				"gruppe_kurzbz" => $semesterVerteiler,
+				"mailto" => "mailto:" . strtolower($semesterVerteiler) . "@" . DOMAIN,
+			];
+
+			if ($studentData->verband && strlen(trim($studentData->verband))) {
+				$verbandVerteiler = $semesterVerteiler . trim($studentData->verband);
+				$mailverteiler_res[] = [
+					"beschreibung" => $this->ci->phrases->t('profil', 'alleStudentenVon') . " " . $verbandVerteiler,
+					"gruppe_kurzbz" => $verbandVerteiler,
+					"mailto" => "mailto:" . strtolower($verbandVerteiler) . "@" . DOMAIN,
+				];
+
+				if ($studentData->gruppe && strlen(trim($studentData->gruppe))) {
+					$gruppeVerteiler = $verbandVerteiler . trim($studentData->gruppe);
+					$mailverteiler_res[] = [
+						"beschreibung" => $this->ci->phrases->t('profil', 'alleStudentenVon') . " " . $gruppeVerteiler,
+						"gruppe_kurzbz" => $gruppeVerteiler,
+						"mailto" => "mailto:" . strtolower($gruppeVerteiler) . "@" . DOMAIN,
+					];
+				}
+			}
+		}
+
 		return $mailverteiler_res;
 	}
 

application/libraries/RaumvorschlagLib.php

@@ -0,0 +1,283 @@
+<?php
+
+if (! defined("BASEPATH")) exit("No direct script access allowed");
+
+use CI3_Events as Events;
+
+class RaumvorschlagLib
+{
+	private $_ci;
+	private $_uid;
+
+	public function __construct($params)
+	{
+		$this->_ci =& get_instance();
+
+		if (isset($params['uid']) && !isEmptyString($params['uid'])){
+			$this->_uid = $params['uid'];
+		} else {
+			show_error('uid of logged user not passed!');
+		}
+
+		$this->_ci->load->model('ressource/Kalender_model', 'KalenderModel');
+		$this->_ci->load->model('ressource/Kalender_Lehreinheit_model', 'KalenderLehreinheitModel');
+		$this->_ci->load->model('ressource/Kalender_Event_model', 'KalenderEventModel');
+		$this->_ci->load->model('ressource/Kalender_Event_Teilnehmer_model', 'KalenderEventTeilnehmerModel');
+		$this->_ci->load->model('ressource/Kalender_Ort_model', 'KalenderOrtModel');
+		$this->_ci->load->model('education/Lehreinheit_model', 'LehreinheitModel');
+		$this->_ci->load->model('education/Lehrveranstaltung_model', 'LehrveranstaltungModel');
+		$this->_ci->load->model('education/LehreinheitMitarbeiter_model', 'LehreinheitMitarbeiterModel');
+		$this->_ci->load->model('ressource/Ort_model', 'OrtModel');
+		$this->_ci->load->model('organisation/gruppe_model', 'GruppeModel');
+		$this->_ci->load->model('organisation/Lehrverband_model', 'LehrverbandModel');
+
+		$this->_ci->load->model('education/Lehreinheitgruppe_model', 'LehreinheitgruppeModel');
+		$this->_ci->load->model('education/Lehreinheitgruppe_model', 'LehreinheitgruppeModel');
+
+		$this->_ci->load->library('CollisionChecker', ["uid" => getAuthUID()]);
+		$this->_ci->load->library('KalenderLib', ["uid" => getAuthUID()]);
+		$this->_ci->load->library('PhrasesLib', array('ui'));
+	}
+
+
+	public function getVorschlaege($kalender_id)
+	{
+		$event = $this->_ci->kalenderlib->getByKalenderId($kalender_id);
+		$event = $event[0];
+
+		$lektor_uids = array_column($event->lektor, 'mitarbeiter_uid');
+		$gruppen_kurzbz = array_values(array_filter(array_column($event->gruppe, 'gruppe_kurzbz')));
+
+		$lehrverband_gruppen = array_values(array_filter($event->gruppe, function($gruppe)
+		{
+			return empty($gruppe['gruppe_kurzbz']);
+		}));
+
+		$tages_events = $this->_ci->kalenderlib->getForRaumvorschlag(
+			$event->datum,
+			$event->datum,
+			$lektor_uids,
+			$gruppen_kurzbz,
+			$lehrverband_gruppen
+		);
+
+		$lektor_davor = $this->_getEventDavor($tages_events, $event->isostart, $lektor_uids, 'lektor');
+		$gruppen_davor = $this->_getEventDavor($tages_events, $event->isostart, $gruppen_kurzbz, 'gruppe');
+
+		$lektor_davor_ort = $lektor_davor ? $this->_getOrtDetails($lektor_davor->ort_kurzbz) : null;
+		$gruppen_davor_ort = $gruppen_davor ? $this->_getOrtDetails($gruppen_davor->ort_kurzbz) : null;
+
+		$kandidaten = $this->_getRaumkandidaten($event);
+		if (empty($kandidaten)) return [];
+
+
+		$ratings = [];
+		foreach ($kandidaten as $raum)
+		{
+			$rating = ['ort_kurzbz' => $raum->ort_kurzbz, 'score' => 100, 'details' => []];
+			$this->_rateLektor($rating, $raum, $lektor_davor_ort);
+			$this->_rateGruppen($rating, $raum, $gruppen_davor_ort);
+
+			Events::trigger('room_rating',
+				function & () use (&$rating) {
+					return $rating;
+				},
+				$raum,
+				$event
+			);
+			$ratings[] = $rating;
+		}
+
+		usort($ratings, function($a, $b)
+		{
+			return $b['score'] - $a['score'];
+		});
+
+		return $ratings;
+
+	}
+
+	private function _getOrtDetails($ort_kurzbz_array)
+	{
+		$ort_kurzbz_array = (array) $ort_kurzbz_array;
+		if (empty($ort_kurzbz_array)) return [];
+		$this->_ci->OrtModel->addSelect('ort_kurzbz, stockwerk, standort_id');
+		$this->_ci->OrtModel->db->where_in('ort_kurzbz', $ort_kurzbz_array);
+		$result = $this->_ci->OrtModel->load();
+
+		return hasData($result) ? getData($result) : [];
+	}
+
+	private function _rateLektor(&$rating, $raum, $lektor_davor_orte)
+	{
+		if (empty($lektor_davor_orte)) return;
+
+		foreach ($lektor_davor_orte as $ort)
+		{
+			if ($ort->ort_kurzbz === $raum->ort_kurzbz)
+			{
+				$rating['score'] += 20;
+				$rating['details'][] = '+20 ' . $this->_ci->phraseslib->t('ui', 'lecturer_already_here');
+				return;
+			}
+		}
+
+		$gleiches_gebaeude = array_filter($lektor_davor_orte, function($ort) use ($raum)
+		{
+			return $ort->standort_id === $raum->standort_id;
+		});
+
+		if (empty($gleiches_gebaeude))
+		{
+			$rating['score'] -= 20;
+			$rating['details'][] = '-20 '. $this->_ci->phraseslib->t('ui', 'lecturer_building_change');
+			return;
+		}
+
+		$diffs = array_map(function($ort) use ($raum)
+		{
+			return abs($ort->stockwerk - $raum->stockwerk);
+		}, $gleiches_gebaeude);
+
+		$diff = min($diffs);
+
+		if ($diff > 0)
+		{
+			$rating['score'] -= $diff * 5;
+			$rating['details'][] = '-' . ($diff * 5) . ' ' . $this->_ci->phraseslib->t('ui', 'lecturer_floor_change');
+		}
+	}
+
+	private function _rateGruppen(&$rating, $raum, $gruppen_davor_orte)
+	{
+		if (empty($gruppen_davor_orte)) return;
+
+		foreach ($gruppen_davor_orte as $ort)
+		{
+			if ($ort->ort_kurzbz === $raum->ort_kurzbz)
+			{
+				$rating['score'] += 10;
+				$rating['details'][] = '+10 ' . $this->_ci->phraseslib->t('ui', 'student_already_here');
+				return;
+			}
+		}
+
+		$gleiches_gebaeude = array_filter($gruppen_davor_orte, function($ort) use ($raum)
+		{
+			return $ort->standort_id === $raum->standort_id;
+		});
+
+		if (empty($gleiches_gebaeude))
+		{
+			$rating['score'] -= 20;
+			$rating['details'][] = '-20 '. $this->_ci->phraseslib->t('ui', 'student_building_change');
+			return;
+		}
+
+		$diffs = array_map(function($ort) use ($raum)
+		{
+			return abs($ort->stockwerk - $raum->stockwerk);
+		}, $gleiches_gebaeude);
+
+		$diff = min($diffs);
+
+		if ($diff > 0)
+		{
+			$rating['score'] -= $diff * 5;
+			$rating['details'][] = '-' . ($diff * 5) . ' '. $this->_ci->phraseslib->t('ui', 'student_floor_change');
+		}
+	}
+
+	private function _getEventDavor($events, $von, $uids, $type)
+	{
+		$kandidat = null;
+
+		foreach ($events as $event)
+		{
+			if ($event->isoend > $von)
+				continue;
+
+			//Wenn zwischen zwei Events eine 30+ Minuten Pause liegt, wird das Event davor nicht berücksichtigt
+			if ((strtotime($von) - strtotime($event->isoend)) > 30 * 60)
+				continue;
+
+			if (empty($event->ort_kurzbz))
+				continue;
+
+			if ($type === 'lektor')
+				$event_uids = array_column($event->lektor, 'mitarbeiter_uid');
+			else
+				$event_uids = array_column($event->gruppe, 'gruppe_kurzbz');
+
+			if (empty(array_intersect($event_uids, $uids)))
+				continue;
+
+			if ($kandidat === null || $event->isoend > $kandidat->isoend)
+				$kandidat = $event;
+		}
+
+		return $kandidat;
+	}
+
+	private function _getRaumkandidaten($event)
+	{
+		$lehreinheit = $this->_ci->LehreinheitModel->load($event->lehreinheit_id[0]);
+		if (!hasData($lehreinheit)) return [];
+		$lehreinheit = getData($lehreinheit)[0];
+
+		$this->_ci->KalenderModel->addSelect('tbl_kalender_ort.ort_kurzbz');
+		$this->_ci->KalenderModel->addJoin('lehre.tbl_kalender_ort', 'tbl_kalender.kalender_id = tbl_kalender_ort.kalender_id');
+		$this->_ci->KalenderModel->db->where('tbl_kalender.von <', $event->isoend);
+		$this->_ci->KalenderModel->db->where('tbl_kalender.bis >', $event->isostart);
+		$this->_ci->KalenderModel->db->where_not_in('tbl_kalender.status_kurzbz', ['deleted']);
+		$this->_ci->KalenderModel->db->where('tbl_kalender_ort.ort_kurzbz IS NOT NULL', null, false);
+		$belegte = $this->_ci->KalenderModel->load();
+
+		$belegte_orte = hasData($belegte) ? array_column(getData($belegte), 'ort_kurzbz') : [];
+
+		if (empty($lehreinheit->raumtyp))
+		{
+			$raeume = $this->_getFreieRaeume(null, $belegte_orte);
+			return hasData($raeume) ? getData($raeume) : [];
+		}
+
+		$vorschlaege = [];
+
+		$raeume = $this->_getFreieRaeume($lehreinheit->raumtyp, $belegte_orte);
+		if (hasData($raeume))
+			$vorschlaege = getData($raeume);
+
+		if (count($vorschlaege) < 5 && !empty($lehreinheit->raumtypalternativ))
+		{
+			$bereits_gefunden = array_merge($belegte_orte, array_column($vorschlaege, 'ort_kurzbz'));
+			$alternativ = $this->_getFreieRaeume($lehreinheit->raumtypalternativ, $bereits_gefunden);
+
+			if (!isError($alternativ) && hasData($alternativ))
+				$vorschlaege = array_merge($vorschlaege, getData($alternativ));
+		}
+
+		return $vorschlaege;
+	}
+
+	private function _getFreieRaeume($raumtyp, $belegte_orte)
+	{
+		$this->_ci->OrtModel->addSelect('ort_kurzbz, stockwerk, standort_id');
+		$this->_ci->OrtModel->addJoin('public.tbl_ortraumtyp', 'ort_kurzbz');
+		$this->_ci->OrtModel->db->where('raumtyp_kurzbz', $raumtyp);
+		$this->_ci->OrtModel->db->where('aktiv', true);
+		$this->_ci->OrtModel->db->where("ort_kurzbz NOT LIKE '\_%'", null, false);
+
+		if (!empty($belegte_orte))
+			$this->_ci->OrtModel->db->where_not_in('ort_kurzbz', $belegte_orte);
+		$this->_ci->OrtModel->addOrder('hierarchie, ort_kurzbz');
+
+		return $this->_ci->OrtModel->load();
+	}
+
+
+
+
+
+
+
+}

application/libraries/StundenplanLib.php

@@ -40,13 +40,16 @@ class StundenplanLib
 	 * @return stdClass
 	 * @access public
 	 */
-	public function getEventsUser($start, $end)
+	public function getEventsUser($start, $end, $uid = null)
 	{
 		$this->_ci =& get_instance();
 
 		$this->_ci->load->model('ressource/Mitarbeiter_model', 'MitarbeiterModel');
 
-		$uid = getAuthUID();
+		if (!$uid) {
+			$uid = getAuthUID();
+		}
+		
 		if (is_null($uid))
 			return error("No UID");
 		
@@ -217,7 +220,7 @@ class StundenplanLib
 	 * @param string	$ort_kurzbz
 	 * @return stdClass
 	 */
-	public function getReservierungen($start_date, $end_date, $ort_kurzbz = '')
+	public function getReservierungen($start_date, $end_date, $ort_kurzbz = '', $uid = null)
 	{
 		$this->_ci =& get_instance();
 
@@ -228,14 +231,14 @@ class StundenplanLib
 		$this->_ci->load->model('ressource/Reservierung_model', 'ReservierungModel');
 		$this->_ci->load->model('ressource/Stundenplan_model', 'StundenplanModel');
 
-		$is_mitarbeiter = getData($this->_ci->MitarbeiterModel->isMitarbeiter(getAuthUID()));
+		$is_mitarbeiter = getData($this->_ci->MitarbeiterModel->isMitarbeiter($uid ?? getAuthUID()));
 
 		if ($is_mitarbeiter && empty($ort_kurzbz)) {
 			// request for personal lvplan show only reservations of logged in user
-			$reservierungen = $this->_ci->ReservierungModel->getReservierungenMitarbeiter($start_date, $end_date);
+			$reservierungen = $this->_ci->ReservierungModel->getReservierungenMitarbeiter($start_date, $end_date, $uid);
 		} else {
 			// querying the reservierungen
-			$reservierungen = $this->_ci->ReservierungModel->getReservierungen($start_date, $end_date, $ort_kurzbz);
+			$reservierungen = $this->_ci->ReservierungModel->getReservierungen($start_date, $end_date, $ort_kurzbz, $uid);
 		}
 		
 		if (isError($reservierungen))
@@ -357,7 +360,10 @@ class StundenplanLib
 				if (isError($ort_content_object)) {
 					return error(getData($ort_content_object));
 				}
-				$ort_content_object = getData($ort_content_object)[0];
+				$ort_content_object_data = getData($ort_content_object);
+				$ort_content_object = (is_array($ort_content_object_data) && count($ort_content_object_data) > 0)
+					? $ort_content_object_data[0]
+					: null;
 				if($ort_content_object) {
 					$item->ort_content_id = $ort_content_object->content_id;
 				}
@@ -445,6 +451,24 @@ class StundenplanLib
 		return success($ferienEventsFlattened);
 	}
 
+	public function getEventsStgOrg( $start, $end, $stg_kz, $sem, $verband, $gruppe)
+	{
+		$this->_ci =& get_instance();
+
+		$this->_ci->load->model('ressource/Stundenplan_model', 'StundenplanModel');
+
+		$stundenplan_data = $this->_ci->StundenplanModel->getStundenplanStudiengang($start, $end, $stg_kz, $sem, $verband, $gruppe);
+		if (isError($stundenplan_data))
+			return $stundenplan_data;
+		$stundenplan_data = getData($stundenplan_data) ?? [];
+
+		$function_error = $this->expandObjectInformation($stundenplan_data);
+		if ($function_error)
+			return $function_error;
+
+		return success($stundenplan_data);
+	}
+
 	// start of the private functions ########################################################################################################
 
 	// function used to sort an array of studiensemester strings

application/libraries/VariableLib.php

@@ -14,9 +14,9 @@ class VariableLib
 	/**
 	 * VariableLib constructor.
 	 * Loads variable of logged in user.
-	 * @param $loggeduid
+	 * @param $params
 	 */
-	public function __construct($loggeduid)
+	public function __construct($params)
 	{
 		$this->_ci =& get_instance();
 
@@ -25,8 +25,8 @@ class VariableLib
 		$this->_ci->load->model('system/Variable_model', 'VariableModel');
 		$this->_ci->load->model('organisation/studiensemester_model', 'StudiensemesterModel');
 
-		if (isset($loggeduid['uid']) && !isEmptyString($loggeduid['uid']))
-			$this->_setVariables($loggeduid['uid']);
+		if (isset($params['uid']) && !isEmptyString($params['uid']))
+			$this->_setVariables($params['uid']);
 		else
 		{
 			show_error('uid of logged user not passed!');

application/libraries/collision/checks/LectureCollisionCheck.php

@@ -0,0 +1,266 @@
+<?php
+
+class LectureCollisionCheck implements ICollisionCheck
+{
+
+	private $_ci;
+	private $_uid;
+
+	public function __construct($params)
+	{
+		$this->_ci =& get_instance();
+		
+		if (isset($params['uid']) && !isEmptyString($params['uid'])){
+			$this->_uid = $params['uid'];
+		} else {
+			show_error('uid of logged user not passed!');
+		}
+
+		$this->_ci->load->model('ressource/Kalender_model', 'KalenderModel');
+		$this->_ci->load->model('ressource/zeitsperre_model', 'ZeitsperreModel');
+		$this->_ci->load->library('VariableLib', ['uid' => $this->_uid]);
+		$this->_ci->load->library('PhrasesLib', array('ui'));
+
+	}
+
+	public function getName()
+	{
+		return 'lecture';
+	}
+
+	public function check($data)
+	{
+		if (!isset($data->von, $data->bis, $data->kalender_id)) return [];
+
+		if ($this->_ci->variablelib->getVar('ignore_kollision') === 'true') return [];
+
+		$uids = $this->_getUids($data->kalender_id);
+
+		if (empty($uids)) return [];
+
+		$collisions = [];
+
+		$collisions = array_merge($collisions, $this->_checkLehreinheit($uids, $data));
+		$collisions = array_merge($collisions, $this->_checkReservierung($uids, $data));
+		$collisions = array_merge($collisions, $this->_checkZeitsperre($uids, $data));
+
+		return $collisions;
+	}
+
+	public function checkAll($kalender_ids)
+	{
+		if (empty($kalender_ids)) return [];
+
+		$kollisionsfreie_user = unserialize(KOLLISIONSFREIE_USER);
+		$grouped = [];
+
+		$this->_ci->KalenderModel->addSelect('DISTINCT ON (tbl_kalender.kalender_id) tbl_kalender.kalender_id');
+		$this->_ci->KalenderModel->addJoin('lehre.tbl_kalender_lehreinheit current_kalender_le', 'current_kalender_le.kalender_id = tbl_kalender.kalender_id');
+		$this->_ci->KalenderModel->addJoin('lehre.tbl_lehreinheit current_lehreinheit', 'current_lehreinheit.lehreinheit_id = current_kalender_le.lehreinheit_id');
+		$this->_ci->KalenderModel->addJoin('lehre.tbl_lehreinheitmitarbeiter current_lehreinheit_ma', 'current_lehreinheit_ma.lehreinheit_id = current_lehreinheit.lehreinheit_id');
+		$this->_ci->KalenderModel->addJoin('lehre.tbl_lehreinheitmitarbeiter other_lehreinheithreinheit_ma', 'other_lehreinheithreinheit_ma.mitarbeiter_uid = current_lehreinheit_ma.mitarbeiter_uid');
+		$this->_ci->KalenderModel->addJoin('lehre.tbl_lehreinheit other_lehreinheit', 'other_lehreinheit.lehreinheit_id = other_lehreinheithreinheit_ma.lehreinheit_id');
+		$this->_ci->KalenderModel->addJoin('lehre.tbl_kalender_lehreinheit other_kalender_le', 'other_kalender_le.lehreinheit_id = other_lehreinheit.lehreinheit_id');
+		$this->_ci->KalenderModel->addJoin('lehre.tbl_kalender other_kalender', 'other_kalender.kalender_id = other_kalender_le.kalender_id');
+
+		$this->_ci->KalenderModel->db->where('other_kalender.kalender_id != tbl_kalender.kalender_id', null, false);
+		$this->_ci->KalenderModel->db->where('other_kalender.von < tbl_kalender.bis', null, false);
+		$this->_ci->KalenderModel->db->where('other_kalender.bis > tbl_kalender.von', null, false);
+		$this->_ci->KalenderModel->db->where_not_in('other_kalender.status_kurzbz', ['archived', 'deleted', 'to_delete']);
+		$this->_ci->KalenderModel->db->where_not_in('current_lehreinheit_ma.mitarbeiter_uid', $kollisionsfreie_user);
+		$this->_ci->KalenderModel->db->where_in('tbl_kalender.kalender_id', $kalender_ids);
+		$this->_ci->KalenderModel->db->where(
+			'other_kalender.kalender_id NOT IN (SELECT vorgaenger_kalender_id FROM lehre.tbl_kalender WHERE vorgaenger_kalender_id IS NOT NULL)',
+			null, false
+		);
+		$result = $this->_ci->KalenderModel->load();
+		if (!isError($result) && hasData($result))
+		{
+			foreach (getData($result) as $row)
+			{
+				$grouped[$row->kalender_id][] = true;
+			}
+		}
+
+		$this->_ci->KalenderModel->addSelect('DISTINCT ON (tbl_kalender.kalender_id) tbl_kalender.kalender_id');
+		$this->_ci->KalenderModel->addJoin('lehre.tbl_kalender_lehreinheit current_kalender_le', 'current_kalender_le.kalender_id = tbl_kalender.kalender_id');
+		$this->_ci->KalenderModel->addJoin('lehre.tbl_lehreinheit current_lehreinheit', 'current_lehreinheit.lehreinheit_id = current_kalender_le.lehreinheit_id');
+		$this->_ci->KalenderModel->addJoin('lehre.tbl_lehreinheitmitarbeiter current_lehreinheit_ma', 'current_lehreinheit_ma.lehreinheit_id = current_lehreinheit.lehreinheit_id');
+		$this->_ci->KalenderModel->addJoin('lehre.tbl_kalender_event_teilnehmer other_t', 'other_t.uid = current_lehreinheit_ma.mitarbeiter_uid');
+		$this->_ci->KalenderModel->addJoin('lehre.tbl_kalender_event other_e', 'other_e.kalender_id = other_t.kalender_id');
+		$this->_ci->KalenderModel->addJoin('lehre.tbl_kalender other_kalender', 'other_kalender.kalender_id = other_e.kalender_id');
+
+		$this->_ci->KalenderModel->db->where('other_kalender.kalender_id != tbl_kalender.kalender_id', null, false);
+		$this->_ci->KalenderModel->db->where('other_kalender.von < tbl_kalender.bis', null, false);
+		$this->_ci->KalenderModel->db->where('other_kalender.bis > tbl_kalender.von', null, false);
+		$this->_ci->KalenderModel->db->where_not_in('other_kalender.status_kurzbz', ['archived', 'deleted', 'to_delete']);
+		$this->_ci->KalenderModel->db->where_not_in('current_lehreinheit_ma.mitarbeiter_uid', $kollisionsfreie_user);
+		$this->_ci->KalenderModel->db->where_in('tbl_kalender.kalender_id', $kalender_ids);
+		$this->_ci->KalenderModel->db->where(
+			'other_kalender.kalender_id NOT IN (SELECT vorgaenger_kalender_id FROM lehre.tbl_kalender WHERE vorgaenger_kalender_id IS NOT NULL)',
+			null, false
+		);
+		$result = $this->_ci->KalenderModel->load();
+		if (!isError($result) && hasData($result))
+		{
+			foreach (getData($result) as $row)
+			{
+				$grouped[$row->kalender_id][] = true;
+			}
+		}
+
+		$this->_ci->KalenderModel->addSelect('DISTINCT ON (tbl_kalender.kalender_id) tbl_kalender.kalender_id');
+		$this->_ci->KalenderModel->addJoin('lehre.tbl_kalender_lehreinheit current_kalender_le', 'current_kalender_le.kalender_id = tbl_kalender.kalender_id');
+		$this->_ci->KalenderModel->addJoin('lehre.tbl_lehreinheit current_lehreinheit', 'current_lehreinheit.lehreinheit_id = current_kalender_le.lehreinheit_id');
+		$this->_ci->KalenderModel->addJoin('lehre.tbl_lehreinheitmitarbeiter current_lehreinheit_ma', 'current_lehreinheit_ma.lehreinheit_id = current_lehreinheit.lehreinheit_id');
+		$this->_ci->KalenderModel->addJoin('campus.tbl_zeitsperre z',
+			"z.mitarbeiter_uid = current_lehreinheit_ma.mitarbeiter_uid 
+			AND z.zeitsperretyp_kurzbz != 'ZVerfueg'");
+		$this->_ci->KalenderModel->addJoin('lehre.tbl_stunde vonstunde_z', 'vonstunde_z.stunde = z.vonstunde', 'LEFT');
+		$this->_ci->KalenderModel->addJoin('lehre.tbl_stunde bisstunde_z', 'bisstunde_z.stunde = z.bisstunde', 'LEFT');
+
+		$this->_ci->KalenderModel->db->where('(z.vondatum + COALESCE(vonstunde_z.beginn, \'00:00\'))::timestamp < tbl_kalender.bis', null, false);
+		$this->_ci->KalenderModel->db->where('(z.bisdatum + COALESCE(bisstunde_z.ende, \'23:59\'))::timestamp > tbl_kalender.von', null, false);
+		$this->_ci->KalenderModel->db->where_not_in('current_lehreinheit_ma.mitarbeiter_uid', $kollisionsfreie_user);
+		$this->_ci->KalenderModel->db->where_in('tbl_kalender.kalender_id', $kalender_ids);
+		$result = $this->_ci->KalenderModel->load();
+
+
+		if (!isError($result) && hasData($result))
+		{
+			foreach (getData($result) as $row)
+			{
+				$grouped[$row->kalender_id][] = true;
+			}
+		}
+
+		return $grouped;
+	}
+
+	private function _getUids($kalender_id)
+	{
+		$kollisionsfreie_user = unserialize(KOLLISIONSFREIE_USER);
+
+		$this->_ci->KalenderModel->addDistinct('mitarbeiter_uid, tbl_kalender_event_teilnehmer.uid');
+		$this->_ci->KalenderModel->addSelect('mitarbeiter_uid, tbl_kalender_event_teilnehmer.uid');
+		$this->_ci->KalenderModel->addJoin('lehre.tbl_kalender_lehreinheit', 'kalender_id', 'LEFT');
+		$this->_ci->KalenderModel->addJoin('lehre.tbl_lehreinheit', 'lehreinheit_id', 'LEFT');
+		$this->_ci->KalenderModel->addJoin('lehre.tbl_lehreinheitmitarbeiter', 'lehreinheit_id', 'LEFT');
+		$this->_ci->KalenderModel->addJoin('lehre.tbl_kalender_event', 'kalender_id', 'LEFT');
+		$this->_ci->KalenderModel->addJoin('lehre.tbl_kalender_event_teilnehmer', 'tbl_kalender_event.kalender_id = tbl_kalender_event_teilnehmer.kalender_id', 'LEFT');
+
+		$this->_ci->KalenderModel->db->group_start();
+			$this->_ci->KalenderModel->db->where_not_in('mitarbeiter_uid', $kollisionsfreie_user);
+			$this->_ci->KalenderModel->db->or_where('mitarbeiter_uid IS NULL', null, false);
+		$this->_ci->KalenderModel->db->group_end();
+
+		$result = $this->_ci->KalenderModel->loadWhere(array(
+			'tbl_kalender.kalender_id' => $kalender_id
+		));
+
+		if (isError($result) || !hasData($result)) return [];
+
+		$data = getData($result);
+		$mitarbeiter_uids = array_filter(array_column($data, 'mitarbeiter_uid'));
+		$event_teilnehmer = array_filter(array_column($data, 'uid'));
+
+		return array_unique(array_merge($mitarbeiter_uids, $event_teilnehmer));
+	}
+
+	private function _checkLehreinheit($uids, $data)
+	{
+		$kollisionsfreie_user = unserialize(KOLLISIONSFREIE_USER);
+
+		$this->_ci->KalenderModel->addDistinct('mitarbeiter_uid, tbl_kalender.von, tbl_kalender.bis');
+		$this->_ci->KalenderModel->addSelect('mitarbeiter_uid, tbl_kalender.von, tbl_kalender.bis');
+		$this->_ci->KalenderModel->addJoin('lehre.tbl_kalender_lehreinheit', 'kalender_id', 'LEFT');
+		$this->_ci->KalenderModel->addJoin('lehre.tbl_lehreinheit', 'lehreinheit_id', 'LEFT');
+		$this->_ci->KalenderModel->addJoin('lehre.tbl_lehreinheitmitarbeiter', 'lehreinheit_id', 'LEFT');
+
+		$this->_ci->KalenderModel->db->where_in('mitarbeiter_uid', $uids);
+		$this->_ci->KalenderModel->db->where('tbl_kalender.kalender_id !=', $data->kalender_id);
+		$this->_ci->KalenderModel->db->where_not_in('tbl_kalender.status_kurzbz', array('archived', 'deleted', 'to_delete'));
+		$this->_ci->KalenderModel->db->where_not_in('mitarbeiter_uid', $kollisionsfreie_user);
+		$this->_ci->KalenderModel->db->where(
+			'tbl_kalender.kalender_id NOT IN (SELECT vorgaenger_kalender_id FROM lehre.tbl_kalender WHERE vorgaenger_kalender_id IS NOT NULL)',
+			null, false
+		);
+
+		$result = $this->_ci->KalenderModel->loadWhere(array(
+			'von <' => $data->bis,
+			'bis >' => $data->von,
+		));
+
+		if (isError($result) || !hasData($result)) return [];
+
+		return array_map(function($row)
+		{
+			return [
+				'message' => $this->_ci->phraseslib->t('ui', 'ma_le_kollision') . ': ' . $row->mitarbeiter_uid . ' (' . date('d.m.Y H:i', strtotime($row->von)) . ' - ' . date('d.m.Y H:i', strtotime($row->bis)) . ')',
+				'errorCode' => 'lector_collision',
+			];
+		}, getData($result));
+	}
+
+	private function _checkReservierung($uids, $data)
+	{
+		if ($this->_ci->variablelib->getVar('ignore_reservierung') === 'true') return [];
+
+		$kollisionsfreie_user = unserialize(KOLLISIONSFREIE_USER);
+
+
+		$this->_ci->KalenderModel->addDistinct('tbl_kalender_event_teilnehmer.uid, tbl_kalender.von, tbl_kalender.bis');
+		$this->_ci->KalenderModel->addSelect('tbl_kalender_event_teilnehmer.uid, tbl_kalender.von, tbl_kalender.bis');
+		$this->_ci->KalenderModel->addJoin('lehre.tbl_kalender_event', 'kalender_id', 'LEFT');
+		$this->_ci->KalenderModel->addJoin('lehre.tbl_kalender_event_teilnehmer', 'tbl_kalender_event.kalender_id = tbl_kalender_event_teilnehmer.kalender_id', 'LEFT');
+
+		$this->_ci->KalenderModel->db->where_in('tbl_kalender_event_teilnehmer.uid', $uids);
+		$this->_ci->KalenderModel->db->where('tbl_kalender.kalender_id !=', $data->kalender_id);
+		$this->_ci->KalenderModel->db->where_not_in('tbl_kalender.status_kurzbz', array('archived', 'deleted', 'to_delete'));
+		$this->_ci->KalenderModel->db->where_not_in('uid', $kollisionsfreie_user);
+		$this->_ci->KalenderModel->db->where(
+			'tbl_kalender.kalender_id NOT IN (SELECT vorgaenger_kalender_id FROM lehre.tbl_kalender WHERE vorgaenger_kalender_id IS NOT NULL)',
+			null, false
+		);
+		$result = $this->_ci->KalenderModel->loadWhere(array(
+			'von <' => $data->bis,
+			'bis >' => $data->von,
+		));
+
+		if (isError($result) || !hasData($result)) return [];
+
+		return array_map(function($row)
+		{
+			return [
+				'message' => $this->_ci->phraseslib->t('ui', 'reservierung_kollision') . ': ' . $row->uid . ' (' . date('d.m.Y H:i', strtotime($row->von)) . ' - ' . date('d.m.Y H:i', strtotime($row->bis)) . ')',
+				'errorCode' => 'reservation_collision',
+			];
+		}, getData($result));
+	}
+
+	private function _checkZeitsperre($uids, $data)
+	{
+		if ($this->_ci->variablelib->getVar('ignore_zeitsperre') === 'true') return [];
+
+		$this->_ci->ZeitsperreModel->addSelect('mitarbeiter_uid, vondatum, vonstunde_z.beginn as von_beginn, bisdatum, bisstunde_z.ende as bis_ende');
+		$this->_ci->ZeitsperreModel->addJoin('lehre.tbl_stunde vonstunde_z', 'vonstunde_z.stunde = tbl_zeitsperre.vonstunde', 'LEFT');
+		$this->_ci->ZeitsperreModel->addJoin('lehre.tbl_stunde bisstunde_z', 'bisstunde_z.stunde = tbl_zeitsperre.bisstunde', 'LEFT');
+		$this->_ci->ZeitsperreModel->db->where('zeitsperretyp_kurzbz !=', 'ZVerfueg');
+		$this->_ci->ZeitsperreModel->db->where('(tbl_zeitsperre.vondatum + COALESCE(vonstunde_z.beginn, \'00:00\'))::timestamp <', $data->bis);
+		$this->_ci->ZeitsperreModel->db->where('(tbl_zeitsperre.bisdatum + COALESCE(bisstunde_z.ende, \'23:59\'))::timestamp >', $data->von);
+
+		$this->_ci->ZeitsperreModel->db->where_in('mitarbeiter_uid', $uids);
+		$result = $this->_ci->ZeitsperreModel->load();
+
+		if (isError($result) || !hasData($result)) return [];
+
+		return array_map(function($row)
+		{
+			return [
+				'message' => $this->_ci->phraseslib->t('ui', 'ma_zeitsperre_kollision') . ': ' . $row->mitarbeiter_uid . ' (' . date('d.m.Y H:i', strtotime($row->vondatum . ' ' . $row->von_beginn)) . ' - ' . date('d.m.Y H:i', strtotime($row->bisdatum . ' ' . $row->bis_ende)) . ')',
+				'errorCode' => 'absences_collision',
+			];
+		}, getData($result));
+	}
+
+}

application/libraries/collision/checks/ResourcesCollisionCheck.php

@@ -0,0 +1,93 @@
+<?php
+
+class ResourcesCollisionCheck implements ICollisionCheck
+{
+
+	private $_ci;
+	private $_uid;
+
+	public function __construct($params)
+	{
+		$this->_ci =& get_instance();
+		
+		if (isset($params['uid']) && !isEmptyString($params['uid'])){
+			$this->_uid = $params['uid'];
+		} else {
+			show_error('uid of logged user not passed!');
+		}
+
+		$this->_ci->load->model('ressource/Kalender_model', 'KalenderModel');
+		$this->_ci->load->library('VariableLib', array('uid' => $this->_uid));
+		$this->_ci->load->library('PhrasesLib', array('ui'));
+	}
+
+	public function getName()
+	{
+		return 'resources';
+	}
+
+	public function check($data)
+	{
+		if (!isset($data->betriebsmittel_ids, $data->von, $data->bis, $data->kalender_id)) return [];
+
+		if (empty($data->betriebsmittel_ids)) return [];
+
+		if ($this->_ci->variablelib->getVar('ignore_kollision') === 'true') return [];
+		if ($this->_ci->variablelib->getVar('ignore_resources_collisions') === 'true') return [];
+
+		$this->_ci->KalenderModel->addSelect('kalender_id, von, bis, bm.beschreibung AS betriebsmittel_beschreibung');
+		$this->_ci->KalenderModel->addJoin('lehre.tbl_betriebsmittel_kalender bk', 'bk.eindeutige_kalender_gruppen_id = tbl_kalender.eindeutige_kalender_gruppen_id');
+		$this->_ci->KalenderModel->addJoin('wawi.tbl_betriebsmittel bm', 'bm.betriebsmittel_id = bk.betriebsmittel_id');
+
+		$this->_ci->KalenderModel->db->where('tbl_kalender.kalender_id !=', $data->kalender_id);
+		$this->_ci->KalenderModel->db->where('tbl_kalender.kalender_id NOT IN (SELECT vorgaenger_kalender_id FROM lehre.tbl_kalender WHERE vorgaenger_kalender_id IS NOT NULL)', null, false);
+		$this->_ci->KalenderModel->db->where_not_in('tbl_kalender.status_kurzbz', ['archived', 'deleted', 'to_delete']);
+		$this->_ci->KalenderModel->db->where_in('bk.betriebsmittel_id', $data->betriebsmittel_ids);
+
+
+		$result = $this->_ci->KalenderModel->loadWhere(array(
+			'von <' => $data->bis,
+			'bis >' => $data->von,
+		));
+
+		if (isError($result)) return [];
+		if (!hasData($result)) return [];
+
+		return array_map(function($row)
+		{
+			return [
+				'errorCode' => 'resource_collision',
+				'message' => $this->_ci->phraseslib->t('ui', 'resource_collision') . ': ' . $row->betriebsmittel_beschreibung . ' (' . date('d.m.Y H:i', strtotime($row->von)) . ' - ' . date('d.m.Y H:i', strtotime($row->bis)) . ')'
+			];
+		}, getData($result));
+	}
+
+	public function checkAll($kalender_ids) 
+	{
+		if (empty($kalender_ids)) return [];
+
+		$this->_ci->KalenderModel->addSelect('DISTINCT ON (tbl_kalender.kalender_id) tbl_kalender.kalender_id');
+		$this->_ci->KalenderModel->addJoin('lehre.tbl_betriebsmittel_kalender current_bk', 'current_bk.eindeutige_kalender_gruppen_id = tbl_kalender.eindeutige_kalender_gruppen_id');
+		$this->_ci->KalenderModel->addJoin('lehre.tbl_betriebsmittel_kalender other_bk', 'other_bk.betriebsmittel_id = current_bk.betriebsmittel_id');
+		$this->_ci->KalenderModel->addJoin('lehre.tbl_kalender other_kalender', 'other_kalender.eindeutige_kalender_gruppen_id = other_bk.eindeutige_kalender_gruppen_id');
+
+		$this->_ci->KalenderModel->db->where('other_kalender.kalender_id != tbl_kalender.kalender_id', null, false);
+		$this->_ci->KalenderModel->db->where('other_kalender.von < tbl_kalender.bis', null, false);
+		$this->_ci->KalenderModel->db->where('other_kalender.bis > tbl_kalender.von', null, false);
+		$this->_ci->KalenderModel->db->where_not_in('other_kalender.status_kurzbz', ['archived', 'deleted', 'to_delete']);
+		$this->_ci->KalenderModel->db->where_in('tbl_kalender.kalender_id', $kalender_ids);
+		$this->_ci->KalenderModel->db->where('other_kalender.kalender_id NOT IN (SELECT vorgaenger_kalender_id FROM lehre.tbl_kalender WHERE vorgaenger_kalender_id IS NOT NULL)', null, false);
+
+		$result = $this->_ci->KalenderModel->load();
+
+		if (isError($result) || !hasData($result)) return [];
+
+		$grouped = [];
+		foreach (getData($result) as $row)
+		{
+			$grouped[$row->kalender_id][] = true;
+		}
+
+		return $grouped;
+	}
+}

application/libraries/collision/checks/RoomCollisionCheck.php

@@ -0,0 +1,89 @@
+<?php
+
+class RoomCollisionCheck implements ICollisionCheck
+{
+
+	private $_ci;
+	private $_uid;
+
+	public function __construct($params)
+	{
+		$this->_ci =& get_instance();
+		
+		if (isset($params['uid']) && !isEmptyString($params['uid'])){
+			$this->_uid = $params['uid'];
+		} else {
+			show_error('uid of logged user not passed!');
+		}
+
+		$this->_ci->load->model('ressource/Kalender_model', 'KalenderModel');
+		$this->_ci->load->library('VariableLib', array('uid' => $this->_uid));
+		$this->_ci->load->library('PhrasesLib', array('ui'));
+	}
+
+	public function getName()
+	{
+		return 'room';
+	}
+
+	public function check($data)
+	{
+		if (!isset($data->ort_kurzbz, $data->von, $data->bis, $data->kalender_id) || isEmptyArray($data->ort_kurzbz)) return [];
+
+		if ($this->_ci->variablelib->getVar('ignore_kollision') === 'true') return [];
+
+		$this->_ci->KalenderModel->addSelect('kalender_id, ort_kurzbz, von, bis');
+		$this->_ci->KalenderModel->addJoin('lehre.tbl_kalender_ort', 'kalender_id');
+
+		$this->_ci->KalenderModel->db->where('tbl_kalender.kalender_id !=', $data->kalender_id);
+		$this->_ci->KalenderModel->db->where('tbl_kalender.kalender_id NOT IN (SELECT vorgaenger_kalender_id FROM lehre.tbl_kalender WHERE vorgaenger_kalender_id IS NOT NULL)', null, false);
+		$this->_ci->KalenderModel->db->where_not_in('tbl_kalender.status_kurzbz', ['archived', 'deleted', 'to_delete']);
+
+		$this->_ci->KalenderModel->db->where_in('ort_kurzbz', $data->ort_kurzbz);
+		$result = $this->_ci->KalenderModel->loadWhere(array(
+			'von <' => $data->bis,
+			'bis >' => $data->von,
+		));
+
+		if (isError($result)) return [];
+		if (!hasData($result)) return [];
+
+		return array_map(function($row)
+		{
+			return [
+				'errorCode' => 'room_collision',
+				'message' => $this->_ci->phraseslib->t('ui', 'raum_kollision') . ': ' . $row->ort_kurzbz . ' (' . date('d.m.Y H:i', strtotime($row->von)) . ' - ' . date('d.m.Y H:i', strtotime($row->bis)) . ')'
+			];
+		}, getData($result));
+	}
+
+	public function checkAll($kalender_ids)
+	{
+		if (empty($kalender_ids)) return [];
+
+		$this->_ci->KalenderModel->addSelect('DISTINCT ON (tbl_kalender.kalender_id) tbl_kalender.kalender_id');
+		$this->_ci->KalenderModel->addJoin('lehre.tbl_kalender_ort current_ort', 'current_ort.kalender_id = tbl_kalender.kalender_id');
+		$this->_ci->KalenderModel->addJoin('lehre.tbl_kalender_ort other_ort', 'other_ort.ort_kurzbz = current_ort.ort_kurzbz');
+		$this->_ci->KalenderModel->addJoin('lehre.tbl_kalender other_kalender', 'other_kalender.kalender_id = other_ort.kalender_id');
+
+		$this->_ci->KalenderModel->db->where('other_kalender.kalender_id != tbl_kalender.kalender_id', null, false);
+		$this->_ci->KalenderModel->db->where('other_kalender.von < tbl_kalender.bis', null, false);
+		$this->_ci->KalenderModel->db->where('other_kalender.bis > tbl_kalender.von', null, false);
+		$this->_ci->KalenderModel->db->where_not_in('other_kalender.status_kurzbz', ['archived', 'deleted', 'to_delete']);
+		$this->_ci->KalenderModel->db->where_in('tbl_kalender.kalender_id', $kalender_ids);
+		$this->_ci->KalenderModel->db->where('other_kalender.kalender_id NOT IN (SELECT vorgaenger_kalender_id FROM lehre.tbl_kalender WHERE vorgaenger_kalender_id IS NOT NULL)', null, false);
+
+		$result = $this->_ci->KalenderModel->load();
+
+
+		if (isError($result) || !hasData($result)) return [];
+
+		$grouped = [];
+		foreach (getData($result) as $row)
+		{
+			$grouped[$row->kalender_id][] = true;
+		}
+
+		return $grouped;
+	}
+}

application/libraries/collision/checks/StudentCollisionCheck.php

@@ -0,0 +1,255 @@
+<?php
+
+class StudentCollisionCheck implements ICollisionCheck
+{
+	private $_ci;
+	private $_uid;
+
+	public function __construct($params)
+	{
+		$this->_ci =& get_instance();
+		
+		if (isset($params['uid']) && !isEmptyString($params['uid'])){
+			$this->_uid = $params['uid'];
+		} else {
+			show_error('uid of logged user not passed!');
+		}
+
+		$this->_ci->load->model('ressource/Kalender_model', 'KalenderModel');
+		$this->_ci->load->library('VariableLib', array('uid' => $this->_uid));
+		$this->_ci->load->library('PhrasesLib', array('ui'));
+	}
+
+	public function getName()
+	{
+		return 'student';
+	}
+
+	public function check($data)
+	{
+		if (!isset($data->von, $data->bis, $data->kalender_id)) return [];
+
+		if ($this->_ci->variablelib->getVar('ignore_kollision') === 'true') return [];
+		if ($this->_ci->variablelib->getVar('kollision_student') !== 'true') return [];
+
+		$kollisionsfreie_user = unserialize(KOLLISIONSFREIE_USER);
+		$placeholders = implode(',', array_fill(0, count($kollisionsfreie_user), '?'));
+
+
+		$dbModel = new DB_Model();
+
+		$qry1 = "
+			SELECT DISTINCT tbl_benutzergruppe.uid
+			FROM lehre.tbl_kalender
+			JOIN lehre.tbl_kalender_lehreinheit USING(kalender_id)
+			JOIN lehre.tbl_lehreinheit ON tbl_lehreinheit.lehreinheit_id = tbl_kalender_lehreinheit.lehreinheit_id
+			JOIN lehre.tbl_lehreinheitgruppe ON tbl_lehreinheitgruppe.lehreinheit_id = tbl_lehreinheit.lehreinheit_id
+			JOIN public.tbl_gruppe
+				ON tbl_gruppe.studiengang_kz = tbl_lehreinheitgruppe.studiengang_kz
+				AND tbl_gruppe.semester = tbl_lehreinheitgruppe.semester
+				AND tbl_gruppe.gruppe_kurzbz = tbl_lehreinheitgruppe.gruppe_kurzbz
+			JOIN public.tbl_benutzergruppe ON tbl_benutzergruppe.gruppe_kurzbz = tbl_gruppe.gruppe_kurzbz
+				AND tbl_benutzergruppe.studiensemester_kurzbz = tbl_lehreinheit.studiensemester_kurzbz
+
+			WHERE tbl_kalender.kalender_id = ?
+				AND tbl_benutzergruppe.uid NOT IN ($placeholders)
+			UNION ALL
+
+			SELECT DISTINCT tbl_studentlehrverband.student_uid AS uid
+			FROM lehre.tbl_kalender
+			JOIN lehre.tbl_kalender_lehreinheit USING(kalender_id)
+			JOIN lehre.tbl_lehreinheit ON tbl_lehreinheit.lehreinheit_id = tbl_kalender_lehreinheit.lehreinheit_id
+			JOIN lehre.tbl_lehreinheitgruppe ON tbl_lehreinheitgruppe.lehreinheit_id = tbl_lehreinheit.lehreinheit_id
+			JOIN public.tbl_studentlehrverband
+				ON tbl_studentlehrverband.studiengang_kz = tbl_lehreinheitgruppe.studiengang_kz
+				AND tbl_studentlehrverband.semester = tbl_lehreinheitgruppe.semester
+				AND tbl_studentlehrverband.studiensemester_kurzbz = tbl_lehreinheit.studiensemester_kurzbz
+				AND (tbl_lehreinheitgruppe.verband = tbl_studentlehrverband.verband OR tbl_lehreinheitgruppe.verband IS NULL OR btrim(tbl_lehreinheitgruppe.verband::text) = '' OR tbl_studentlehrverband.verband IS NULL)
+				AND (tbl_lehreinheitgruppe.gruppe = tbl_studentlehrverband.gruppe OR tbl_lehreinheitgruppe.gruppe IS NULL OR btrim(tbl_lehreinheitgruppe.gruppe::text) = '' OR tbl_studentlehrverband.gruppe IS NULL)
+			WHERE tbl_kalender.kalender_id = ?
+				AND tbl_studentlehrverband.student_uid NOT IN ($placeholders)
+
+		";
+
+		$result1 = $dbModel->execReadOnlyQuery($qry1, array_merge(
+			[$data->kalender_id],
+			$kollisionsfreie_user,
+			[$data->kalender_id],
+			$kollisionsfreie_user
+		));
+
+		if (isError($result1) || !hasData($result1)) return [];
+
+		$curUids = array_flip(array_column(getData($result1), 'uid'));
+
+		$qry2 = "
+			SELECT DISTINCT tbl_kalender.kalender_id, tbl_kalender.von, tbl_kalender.bis, tbl_benutzergruppe.uid
+			FROM lehre.tbl_kalender
+			JOIN lehre.tbl_kalender_lehreinheit ON tbl_kalender_lehreinheit.kalender_id = tbl_kalender.kalender_id
+			JOIN lehre.tbl_lehreinheit ON tbl_lehreinheit.lehreinheit_id = tbl_kalender_lehreinheit.lehreinheit_id
+			JOIN lehre.tbl_lehreinheitgruppe ON tbl_lehreinheitgruppe.lehreinheit_id = tbl_lehreinheit.lehreinheit_id
+			JOIN public.tbl_gruppe
+				ON tbl_gruppe.studiengang_kz = tbl_lehreinheitgruppe.studiengang_kz
+				AND tbl_gruppe.semester = tbl_lehreinheitgruppe.semester
+				AND tbl_gruppe.gruppe_kurzbz = tbl_lehreinheitgruppe.gruppe_kurzbz
+			JOIN public.tbl_benutzergruppe ON tbl_benutzergruppe.gruppe_kurzbz = tbl_gruppe.gruppe_kurzbz
+				AND tbl_benutzergruppe.studiensemester_kurzbz = tbl_lehreinheit.studiensemester_kurzbz
+			WHERE tbl_kalender.von < ?
+				AND tbl_kalender.bis > ?
+				AND tbl_kalender.kalender_id != ?
+				AND tbl_kalender.status_kurzbz NOT IN ('archived', 'deleted', 'to_delete')
+				AND tbl_benutzergruppe.uid NOT IN ($placeholders)
+				AND NOT EXISTS (
+					SELECT 1 FROM lehre.tbl_kalender vorgaenger
+					WHERE vorgaenger.vorgaenger_kalender_id = tbl_kalender.kalender_id
+				)
+
+			UNION ALL
+			
+			SELECT DISTINCT tbl_kalender.kalender_id, tbl_kalender.von, tbl_kalender.bis, tbl_studentlehrverband.student_uid AS uid
+			FROM lehre.tbl_kalender
+			JOIN lehre.tbl_kalender_lehreinheit ON tbl_kalender_lehreinheit.kalender_id = tbl_kalender.kalender_id
+			JOIN lehre.tbl_lehreinheit ON tbl_lehreinheit.lehreinheit_id = tbl_kalender_lehreinheit.lehreinheit_id
+			JOIN lehre.tbl_lehreinheitgruppe ON tbl_lehreinheitgruppe.lehreinheit_id = tbl_lehreinheit.lehreinheit_id
+			JOIN public.tbl_studentlehrverband
+				ON tbl_studentlehrverband.studiengang_kz = tbl_lehreinheitgruppe.studiengang_kz
+				AND tbl_studentlehrverband.semester = tbl_lehreinheitgruppe.semester
+				AND tbl_studentlehrverband.studiensemester_kurzbz = tbl_lehreinheit.studiensemester_kurzbz
+				AND (tbl_lehreinheitgruppe.verband = tbl_studentlehrverband.verband OR tbl_lehreinheitgruppe.verband IS NULL OR btrim(tbl_lehreinheitgruppe.verband::text) = '' OR tbl_studentlehrverband.verband IS NULL)
+				AND (tbl_lehreinheitgruppe.gruppe = tbl_studentlehrverband.gruppe OR tbl_lehreinheitgruppe.gruppe IS NULL OR btrim(tbl_lehreinheitgruppe.gruppe::text) = '' OR tbl_studentlehrverband.gruppe IS NULL)
+			WHERE tbl_kalender.von < ?
+				AND tbl_kalender.bis > ?
+				AND tbl_kalender.kalender_id != ?
+				AND tbl_kalender.status_kurzbz NOT IN ('archived', 'deleted', 'to_delete')
+				AND tbl_studentlehrverband.student_uid NOT IN ($placeholders)
+				AND NOT EXISTS (
+					SELECT 1 FROM lehre.tbl_kalender vorgaenger
+					WHERE vorgaenger.vorgaenger_kalender_id = tbl_kalender.kalender_id
+				)
+		";
+
+		$result2 = $dbModel->execReadOnlyQuery($qry2, array_merge(
+			[$data->bis, $data->von, $data->kalender_id],
+			$kollisionsfreie_user,
+			[$data->bis, $data->von, $data->kalender_id],
+			$kollisionsfreie_user
+		));
+
+		if (isError($result2) || !hasData($result2)) return [];
+
+		$conflicts = [];
+		foreach (getData($result2) as $row)
+		{
+			if (isset($curUids[$row->uid]))
+			{
+				$conflicts[] = [
+					'message' =>
+						$this->_ci->phraseslib->t('ui', 'student_kollision')
+						. ': ' . $row->uid
+						. ' (' . date('d.m.Y H:i', strtotime($row->von))
+						. ' - ' . date('d.m.Y H:i', strtotime($row->bis)) . ')',
+					'errorCode' => 'student_collision'
+				];
+
+			}
+		}
+
+		return $conflicts;
+	}
+
+	public function checkAll($kalender_ids)
+	{
+
+		if (empty($kalender_ids)) return [];
+
+		if ($this->_ci->variablelib->getVar('kollision_student') !== 'true') return [];
+
+		$dbModel = new DB_Model();
+		$placeholders = implode(',', array_fill(0, count($kalender_ids), '?'));
+
+		$sql = "
+			SELECT DISTINCT current_kalender.kalender_id, current_benutzergruppe.uid
+			FROM lehre.tbl_kalender current_kalender
+			JOIN lehre.tbl_kalender_lehreinheit current_kalender_le ON current_kalender_le.kalender_id = current_kalender.kalender_id
+			JOIN lehre.tbl_lehreinheit current_lehreinheit ON current_lehreinheit.lehreinheit_id = current_kalender_le.lehreinheit_id
+			JOIN lehre.tbl_lehreinheitgruppe current_lehreinheitgruppe ON current_lehreinheitgruppe.lehreinheit_id = current_lehreinheit.lehreinheit_id
+			JOIN public.tbl_gruppe current_gruppe
+				ON current_gruppe.studiengang_kz = current_lehreinheitgruppe.studiengang_kz
+				AND current_gruppe.semester = current_lehreinheitgruppe.semester
+				AND current_gruppe.gruppe_kurzbz = current_lehreinheitgruppe.gruppe_kurzbz
+			JOIN public.tbl_benutzergruppe current_benutzergruppe ON current_benutzergruppe.gruppe_kurzbz = current_gruppe.gruppe_kurzbz
+					AND current_benutzergruppe.studiensemester_kurzbz = current_lehreinheit.studiensemester_kurzbz
+			JOIN lehre.tbl_kalender other_kalender
+				ON other_kalender.kalender_id != current_kalender.kalender_id
+				AND other_kalender.von < current_kalender.bis
+				AND other_kalender.bis > current_kalender.von
+				AND other_kalender.status_kurzbz NOT IN ('archived', 'deleted', 'to_delete')
+				AND NOT EXISTS (
+					SELECT 1 FROM lehre.tbl_kalender vorgaenger
+					WHERE vorgaenger.vorgaenger_kalender_id = other_kalender.kalender_id
+				)
+			JOIN lehre.tbl_kalender_lehreinheit other_kalender_le ON other_kalender_le.kalender_id = other_kalender.kalender_id
+			JOIN lehre.tbl_lehreinheit other_lehreinheit ON other_lehreinheit.lehreinheit_id = other_kalender_le.lehreinheit_id
+			JOIN lehre.tbl_lehreinheitgruppe other_lehreinheitgruppe ON other_lehreinheitgruppe.lehreinheit_id = other_lehreinheit.lehreinheit_id
+			JOIN public.tbl_gruppe other_gruppe
+				ON other_gruppe.studiengang_kz = other_lehreinheitgruppe.studiengang_kz
+				AND other_gruppe.semester = other_lehreinheitgruppe.semester
+				AND other_gruppe.gruppe_kurzbz = other_lehreinheitgruppe.gruppe_kurzbz
+			JOIN public.tbl_benutzergruppe other_benutzergruppe
+				ON other_benutzergruppe.gruppe_kurzbz = other_gruppe.gruppe_kurzbz
+				AND other_benutzergruppe.uid = current_benutzergruppe.uid
+				AND other_benutzergruppe.studiensemester_kurzbz = other_lehreinheit.studiensemester_kurzbz
+
+
+			WHERE current_kalender.kalender_id IN ($placeholders)
+
+			UNION ALL
+
+			SELECT DISTINCT current_kalender.kalender_id, current_studentlehrverband.student_uid AS uid
+			FROM lehre.tbl_kalender current_kalender
+			JOIN lehre.tbl_kalender_lehreinheit current_kalender_le ON current_kalender_le.kalender_id = current_kalender.kalender_id
+			JOIN lehre.tbl_lehreinheit current_lehreinheit ON current_lehreinheit.lehreinheit_id = current_kalender_le.lehreinheit_id
+			JOIN lehre.tbl_lehreinheitgruppe current_lehreinheitgruppe ON current_lehreinheitgruppe.lehreinheit_id = current_lehreinheit.lehreinheit_id
+			JOIN public.tbl_studentlehrverband current_studentlehrverband
+				ON current_studentlehrverband.studiengang_kz = current_lehreinheitgruppe.studiengang_kz
+				AND current_studentlehrverband.semester = current_lehreinheitgruppe.semester
+				AND current_studentlehrverband.studiensemester_kurzbz = current_lehreinheit.studiensemester_kurzbz
+				AND (current_lehreinheitgruppe.verband = current_studentlehrverband.verband OR current_lehreinheitgruppe.verband IS NULL OR btrim(current_lehreinheitgruppe.verband::text) = '' OR current_studentlehrverband.verband IS NULL)
+				AND (current_lehreinheitgruppe.gruppe = current_studentlehrverband.gruppe OR current_lehreinheitgruppe.gruppe IS NULL OR btrim(current_lehreinheitgruppe.gruppe::text) = '' OR current_studentlehrverband.gruppe IS NULL)
+
+			JOIN lehre.tbl_kalender other_kalender
+				ON other_kalender.kalender_id != current_kalender.kalender_id
+				AND other_kalender.von < current_kalender.bis
+				AND other_kalender.bis > current_kalender.von
+				AND other_kalender.status_kurzbz NOT IN ('archived', 'deleted', 'to_delete')
+				AND NOT EXISTS (
+					SELECT 1 FROM lehre.tbl_kalender vorgaenger
+					WHERE vorgaenger.vorgaenger_kalender_id = other_kalender.kalender_id
+				)
+			JOIN lehre.tbl_kalender_lehreinheit other_kalender_le ON other_kalender_le.kalender_id = other_kalender.kalender_id
+			JOIN lehre.tbl_lehreinheit other_lehreinheit ON other_lehreinheit.lehreinheit_id = other_kalender_le.lehreinheit_id
+			JOIN lehre.tbl_lehreinheitgruppe other_lehreinheitgruppe ON other_lehreinheitgruppe.lehreinheit_id = other_lehreinheit.lehreinheit_id
+			JOIN public.tbl_studentlehrverband other_slv
+				ON other_slv.studiengang_kz = other_lehreinheitgruppe.studiengang_kz
+				AND other_slv.semester = other_lehreinheitgruppe.semester
+				AND other_slv.studiensemester_kurzbz = other_lehreinheit.studiensemester_kurzbz
+				AND other_slv.student_uid = current_studentlehrverband.student_uid
+				AND (other_lehreinheitgruppe.verband = other_slv.verband OR other_lehreinheitgruppe.verband IS NULL OR btrim(other_lehreinheitgruppe.verband::text) = '' OR other_slv.verband IS NULL)
+				AND (other_lehreinheitgruppe.gruppe = other_slv.gruppe OR other_lehreinheitgruppe.gruppe IS NULL OR btrim(other_lehreinheitgruppe.gruppe::text) = '' OR other_slv.gruppe IS NULL)
+
+			WHERE current_kalender.kalender_id IN ($placeholders)
+		";
+
+		$result = $dbModel->execReadOnlyQuery($sql, array_merge($kalender_ids, $kalender_ids));
+
+		if (isError($result) || !hasData($result)) return [];
+
+		$grouped = [];
+		foreach (getData($result) as $row)
+		{
+			$grouped[$row->kalender_id][] = true;
+		}
+
+		return $grouped;
+	}
+}

application/libraries/collision/checks/VerbandCollisionCheck.php

@@ -0,0 +1,370 @@
+<?php
+
+class VerbandCollisionCheck implements ICollisionCheck
+{
+
+	private $_ci;
+	private $_uid;
+
+	public function __construct($params)
+	{
+		$this->_ci =& get_instance();
+		
+		if (isset($params['uid']) && !isEmptyString($params['uid'])){
+			$this->_uid = $params['uid'];
+		} else {
+			show_error('uid of logged user not passed!');
+		}
+
+		$this->_ci->load->model('ressource/Kalender_model', 'KalenderModel');
+		$this->_ci->load->library('VariableLib', array('uid' => $this->_uid));
+		$this->_ci->load->library('PhrasesLib', array('ui'));
+
+	}
+
+	public function getName()
+	{
+		return 'verband';
+	}
+
+	public function check($data)
+	{
+		if (!isset($data->von, $data->bis, $data->kalender_id)) return [];
+
+		if ($this->_ci->variablelib->getVar('ignore_kollision') === 'true') return [];
+
+		$kollision_student = $this->_ci->variablelib->getVar('kollision_student') === 'false';
+		$kollision_reservierung = $this->_ci->variablelib->getVar('ignore_reservierung') === 'false';
+
+		if (!$kollision_student && !$kollision_reservierung) return [];
+
+		$dbModel = new DB_Model();
+		$collisions = [];
+
+		if ($kollision_student)
+		{
+			$union_event = "";
+
+			if ($kollision_reservierung)
+			{
+				$union_event = "
+					UNION
+					SELECT tbl_kalender_event_teilnehmer.studiengang_kz, tbl_kalender_event_teilnehmer.semester, tbl_kalender_event_teilnehmer.verband, tbl_kalender_event_teilnehmer.gruppe, tbl_kalender_event_teilnehmer.gruppe_kurzbz, tbl_kalender_event_teilnehmer.kalender_id
+					FROM lehre.tbl_kalender_event_teilnehmer
+					WHERE tbl_kalender_event_teilnehmer.rolle_kurzbz = 'teilnehmer'
+				";
+			}
+
+			$sql_gruppen = "
+				SELECT
+					other_kalender.von,
+					other_kalender.bis,
+					COALESCE(
+						other_lehreinheitguppe.gruppe_kurzbz,
+						UPPER(stg.typ::text || stg.kurzbz::text) || '-' || other_lehreinheitguppe.semester ||
+						COALESCE(other_lehreinheitguppe.verband::text, '') ||
+						COALESCE(other_lehreinheitguppe.gruppe::text, '')
+					) AS gruppenname
+				FROM lehre.tbl_kalender current_kalender
+
+				JOIN (
+					SELECT tbl_lehreinheitgruppe.studiengang_kz, tbl_lehreinheitgruppe.semester, tbl_lehreinheitgruppe.verband, tbl_lehreinheitgruppe.gruppe,
+						tbl_lehreinheitgruppe.gruppe_kurzbz, tbl_kalender_lehreinheit.kalender_id
+					FROM lehre.tbl_kalender_lehreinheit
+					JOIN lehre.tbl_lehreinheit ON tbl_lehreinheit.lehreinheit_id = tbl_kalender_lehreinheit.lehreinheit_id
+					JOIN lehre.tbl_lehreinheitgruppe ON tbl_lehreinheitgruppe.lehreinheit_id = tbl_lehreinheit.lehreinheit_id
+					". $union_event ."
+				) current_lehreinheitguppe ON current_lehreinheitguppe.kalender_id = current_kalender.kalender_id
+
+				LEFT JOIN public.tbl_gruppe current_gruppe
+					ON current_gruppe.gruppe_kurzbz = current_lehreinheitguppe.gruppe_kurzbz
+
+				JOIN lehre.tbl_kalender other_kalender
+					ON other_kalender.kalender_id != current_kalender.kalender_id
+					AND other_kalender.von < ?
+					AND other_kalender.bis > ?
+
+				JOIN (
+					SELECT tbl_lehreinheitgruppe.studiengang_kz, tbl_lehreinheitgruppe.semester, tbl_lehreinheitgruppe.verband, tbl_lehreinheitgruppe.gruppe,
+						tbl_lehreinheitgruppe.gruppe_kurzbz, tbl_kalender_lehreinheit.kalender_id
+					FROM lehre.tbl_kalender_lehreinheit
+					JOIN lehre.tbl_lehreinheit ON tbl_lehreinheit.lehreinheit_id = tbl_kalender_lehreinheit.lehreinheit_id
+					JOIN lehre.tbl_lehreinheitgruppe ON tbl_lehreinheitgruppe.lehreinheit_id = tbl_lehreinheit.lehreinheit_id
+					". $union_event ."
+				) other_lehreinheitguppe ON other_lehreinheitguppe.kalender_id = other_kalender.kalender_id
+
+				LEFT JOIN public.tbl_gruppe other_gruppe
+					ON other_gruppe.gruppe_kurzbz = other_lehreinheitguppe.gruppe_kurzbz
+
+				LEFT JOIN public.tbl_studiengang stg
+					ON stg.studiengang_kz = other_lehreinheitguppe.studiengang_kz
+
+				WHERE current_kalender.kalender_id = ?
+				AND other_kalender.status_kurzbz NOT IN ('archived', 'deleted', 'to_delete')
+				AND current_lehreinheitguppe.studiengang_kz = other_lehreinheitguppe.studiengang_kz
+				AND current_lehreinheitguppe.semester = other_lehreinheitguppe.semester
+				AND (
+					(
+						current_lehreinheitguppe.gruppe_kurzbz IS NULL
+						AND other_lehreinheitguppe.gruppe_kurzbz IS NULL
+						AND (
+							current_lehreinheitguppe.verband IS NULL
+							OR (
+								current_lehreinheitguppe.verband = other_lehreinheitguppe.verband
+								AND (current_lehreinheitguppe.gruppe IS NULL OR other_lehreinheitguppe.gruppe IS NULL OR current_lehreinheitguppe.gruppe = other_lehreinheitguppe.gruppe)
+							)
+						)
+					)
+					OR
+					(
+						current_lehreinheitguppe.gruppe_kurzbz IS NOT NULL
+						AND other_lehreinheitguppe.gruppe_kurzbz IS NOT NULL
+						AND current_gruppe.direktinskription IS NOT TRUE
+						AND other_gruppe.direktinskription IS NOT TRUE
+					)
+					OR
+					(
+						(
+							current_lehreinheitguppe.gruppe_kurzbz IS NULL
+							AND other_lehreinheitguppe.gruppe_kurzbz IS NOT NULL
+							AND other_gruppe.direktinskription IS NOT TRUE
+						)
+						OR
+						(
+							current_lehreinheitguppe.gruppe_kurzbz IS NOT NULL
+							AND other_lehreinheitguppe.gruppe_kurzbz IS NULL
+							AND current_gruppe.direktinskription IS NOT TRUE
+						)
+					)
+				)
+				AND other_kalender.kalender_id NOT IN (
+					SELECT vorgaenger_kalender_id
+					FROM lehre.tbl_kalender
+					WHERE vorgaenger_kalender_id IS NOT NULL
+				)
+			";
+
+			$result = $dbModel->execReadOnlyQuery($sql_gruppen, [
+				$data->bis,
+				$data->von,
+				$data->kalender_id,
+			]);
+
+			if (!isError($result) && hasData($result))
+			{
+				foreach (getData($result) as $row)
+				{
+					$collisions[] = [
+						'message' => $this->_ci->phraseslib->t('ui', 'verband_kollision') . ': ' . $row->gruppenname . ' (' . date('d.m.Y H:i', strtotime($row->von)) . ' - ' . date('d.m.Y H:i', strtotime($row->bis)) . ')',
+						'errorCode' => 'verband_collision',
+					];
+				}
+			}
+		}
+
+		if ($kollision_reservierung && !$kollision_student)
+		{
+			$sql_reservierung = "
+				SELECT
+					other_kalender.von,
+					other_kalender.bis,
+					COALESCE(
+						other_event_teilnehmer.gruppe_kurzbz,
+						UPPER(stg.typ::text || stg.kurzbz::text) || '-' || other_event_teilnehmer.semester ||
+						COALESCE(other_event_teilnehmer.verband::text, '') ||
+						COALESCE(other_event_teilnehmer.gruppe::text, '')
+					) AS gruppenname
+				FROM lehre.tbl_kalender_event_teilnehmer current_event_teilnehmer
+				LEFT JOIN public.tbl_gruppe current_gruppe
+					ON current_gruppe.gruppe_kurzbz = current_event_teilnehmer.gruppe_kurzbz
+
+				JOIN lehre.tbl_kalender other_kalender
+					ON other_kalender.kalender_id != ?
+					AND other_kalender.von < ?
+					AND other_kalender.bis > ?
+
+				JOIN lehre.tbl_kalender_event_teilnehmer other_event_teilnehmer
+					ON other_event_teilnehmer.kalender_id = other_kalender.kalender_id
+					AND other_event_teilnehmer.rolle_kurzbz = 'teilnehmer'
+
+				LEFT JOIN public.tbl_gruppe other_gruppe
+					ON other_gruppe.gruppe_kurzbz = other_event_teilnehmer.gruppe_kurzbz
+
+				LEFT JOIN public.tbl_studiengang stg
+					ON stg.studiengang_kz = other_event_teilnehmer.studiengang_kz
+
+				WHERE current_event_teilnehmer.kalender_id = ?
+				AND current_event_teilnehmer.rolle_kurzbz = 'teilnehmer'
+				AND other_kalender.status_kurzbz NOT IN ('archived', 'deleted', 'to_delete')
+				AND current_event_teilnehmer.studiengang_kz = other_event_teilnehmer.studiengang_kz
+				AND current_event_teilnehmer.semester = other_event_teilnehmer.semester
+				AND (
+					(
+						current_event_teilnehmer.gruppe_kurzbz IS NULL
+						AND other_event_teilnehmer.gruppe_kurzbz IS NULL
+						AND (
+							current_event_teilnehmer.verband IS NULL
+							OR (
+								current_event_teilnehmer.verband = other_event_teilnehmer.verband
+								AND (current_event_teilnehmer.gruppe IS NULL OR other_event_teilnehmer.gruppe IS NULL OR current_event_teilnehmer.gruppe = other_event_teilnehmer.gruppe)
+							)
+						)
+					)
+					OR
+					(
+						current_event_teilnehmer.gruppe_kurzbz IS NOT NULL
+						AND other_event_teilnehmer.gruppe_kurzbz IS NOT NULL
+						AND current_gruppe.direktinskription IS NOT TRUE
+						AND other_gruppe.direktinskription IS NOT TRUE
+					)
+					OR
+					(
+						(
+							current_event_teilnehmer.gruppe_kurzbz IS NULL
+							AND other_event_teilnehmer.gruppe_kurzbz IS NOT NULL
+							AND other_gruppe.direktinskription IS NOT TRUE
+						)
+						OR
+						(
+							current_event_teilnehmer.gruppe_kurzbz IS NOT NULL
+							AND other_event_teilnehmer.gruppe_kurzbz IS NULL
+							AND current_gruppe.direktinskription IS NOT TRUE
+						)
+					)
+				)
+				AND other_kalender.kalender_id NOT IN (
+					SELECT vorgaenger_kalender_id
+					FROM lehre.tbl_kalender
+					WHERE vorgaenger_kalender_id IS NOT NULL
+				)
+			";
+
+			$result = $dbModel->execReadOnlyQuery($sql_reservierung, [
+				$data->kalender_id,
+				$data->bis,
+				$data->von,
+				$data->kalender_id,
+			]);
+
+			if (!isError($result) && hasData($result))
+			{
+				foreach (getData($result) as $row)
+				{
+					$collisions[] = [
+						'errorCode' => 'reservation_collision',
+						'message' => $this->_ci->phraseslib->t('ui', 'reservierung_kollision') . ': ' . $row->gruppenname . ' (' . date('d.m.Y H:i', strtotime($row->von)) . ' - ' . date('d.m.Y H:i', strtotime($row->bis)) . ')'
+					];
+				}
+			}
+		}
+
+		return $collisions;
+	}
+
+	public function checkAll($kalender_ids)
+	{
+		if (empty($kalender_ids)) return [];
+
+		$dbModel = new DB_Model();
+
+		$placeholders = implode(',', array_fill(0, count($kalender_ids), '?'));
+
+		$sql = "
+			SELECT DISTINCT ON (current_kalender.kalender_id) current_kalender.kalender_id
+			FROM lehre.tbl_kalender current_kalender
+	
+			JOIN (
+				SELECT tbl_lehreinheitgruppe.studiengang_kz, tbl_lehreinheitgruppe.semester, tbl_lehreinheitgruppe.verband, tbl_lehreinheitgruppe.gruppe,
+					tbl_lehreinheitgruppe.gruppe_kurzbz, tbl_kalender_lehreinheit.kalender_id
+				FROM lehre.tbl_kalender_lehreinheit
+				JOIN lehre.tbl_lehreinheit ON tbl_lehreinheit.lehreinheit_id = tbl_kalender_lehreinheit.lehreinheit_id
+				JOIN lehre.tbl_lehreinheitgruppe ON tbl_lehreinheitgruppe.lehreinheit_id = tbl_lehreinheit.lehreinheit_id
+				UNION
+				SELECT tbl_kalender_event_teilnehmer.studiengang_kz, tbl_kalender_event_teilnehmer.semester, tbl_kalender_event_teilnehmer.verband, tbl_kalender_event_teilnehmer.gruppe,
+					tbl_kalender_event_teilnehmer.gruppe_kurzbz, tbl_kalender_event_teilnehmer.kalender_id
+				FROM lehre.tbl_kalender_event_teilnehmer
+			) current_lehreinheitguppe ON current_lehreinheitguppe.kalender_id = current_kalender.kalender_id
+	
+			LEFT JOIN public.tbl_gruppe current_gruppe
+				ON current_gruppe.gruppe_kurzbz = current_lehreinheitguppe.gruppe_kurzbz
+	
+			JOIN lehre.tbl_kalender other_kalender
+				ON other_kalender.kalender_id != current_kalender.kalender_id
+				AND other_kalender.von < current_kalender.bis
+				AND other_kalender.bis > current_kalender.von
+	
+			JOIN (
+				SELECT tbl_lehreinheitgruppe.studiengang_kz, tbl_lehreinheitgruppe.semester, tbl_lehreinheitgruppe.verband, tbl_lehreinheitgruppe.gruppe,
+					tbl_lehreinheitgruppe.gruppe_kurzbz, tbl_kalender_lehreinheit.kalender_id
+				FROM lehre.tbl_kalender_lehreinheit
+				JOIN lehre.tbl_lehreinheit ON tbl_lehreinheit.lehreinheit_id = tbl_kalender_lehreinheit.lehreinheit_id
+				JOIN lehre.tbl_lehreinheitgruppe ON tbl_lehreinheitgruppe.lehreinheit_id = tbl_lehreinheit.lehreinheit_id
+				UNION
+				SELECT tbl_kalender_event_teilnehmer.studiengang_kz, tbl_kalender_event_teilnehmer.semester, tbl_kalender_event_teilnehmer.verband, tbl_kalender_event_teilnehmer.gruppe,
+					tbl_kalender_event_teilnehmer.gruppe_kurzbz, tbl_kalender_event_teilnehmer.kalender_id
+				FROM lehre.tbl_kalender_event_teilnehmer
+			) other_lehreinheitguppe ON other_lehreinheitguppe.kalender_id = other_kalender.kalender_id
+	
+			LEFT JOIN public.tbl_gruppe other_gruppe
+				ON other_gruppe.gruppe_kurzbz = other_lehreinheitguppe.gruppe_kurzbz
+	
+			WHERE current_kalender.kalender_id IN ({$placeholders})
+			AND other_kalender.status_kurzbz NOT IN ('archived', 'deleted', 'to_delete')
+			AND current_lehreinheitguppe.studiengang_kz = other_lehreinheitguppe.studiengang_kz
+			AND current_lehreinheitguppe.semester = other_lehreinheitguppe.semester
+			AND (
+				(
+					current_lehreinheitguppe.gruppe_kurzbz IS NULL
+					AND other_lehreinheitguppe.gruppe_kurzbz IS NULL
+					AND (
+						current_lehreinheitguppe.verband IS NULL
+						OR (
+							current_lehreinheitguppe.verband = other_lehreinheitguppe.verband
+							AND (current_lehreinheitguppe.gruppe IS NULL OR other_lehreinheitguppe.gruppe IS NULL OR current_lehreinheitguppe.gruppe = other_lehreinheitguppe.gruppe)
+						)
+					)
+				)
+				OR
+				(
+					current_lehreinheitguppe.gruppe_kurzbz IS NOT NULL
+					AND other_lehreinheitguppe.gruppe_kurzbz IS NOT NULL
+					AND current_gruppe.direktinskription IS NOT TRUE
+					AND other_gruppe.direktinskription IS NOT TRUE
+				)
+				OR
+				(
+					(
+						current_lehreinheitguppe.gruppe_kurzbz IS NULL
+						AND other_lehreinheitguppe.gruppe_kurzbz IS NOT NULL
+						AND other_gruppe.direktinskription IS NOT TRUE
+					)
+					OR
+					(
+						current_lehreinheitguppe.gruppe_kurzbz IS NOT NULL
+						AND other_lehreinheitguppe.gruppe_kurzbz IS NULL
+						AND current_gruppe.direktinskription IS NOT TRUE
+					)
+				)
+			)
+			AND other_kalender.kalender_id NOT IN (
+				SELECT vorgaenger_kalender_id
+				FROM lehre.tbl_kalender
+				WHERE vorgaenger_kalender_id IS NOT NULL
+			)
+			
+		";
+
+		$result = $dbModel->execReadOnlyQuery($sql, $kalender_ids);
+
+		if (isError($result) || !hasData($result)) return [];
+
+		$grouped = [];
+		foreach (getData($result) as $row)
+		{
+			$grouped[$row->kalender_id][] = true;
+		}
+
+		return $grouped;
+	}
+
+}

application/libraries/dashboard/DashboardLib.php

@@ -37,7 +37,9 @@ class DashboardLib
 	
 	public function getDashboardByKurzbz($dashboard_kurzbz)
 	{
-		$result = $this->_ci->DashboardModel->getDashboardByKurzbz($dashboard_kurzbz);
+		$result = $this->_ci->DashboardModel->loadWhere([
+			'dashboard_kurzbz' => $dashboard_kurzbz
+		]);
 
 		if (hasData($result))
 		{
@@ -47,30 +49,55 @@ class DashboardLib
 		return null;
 	}
 	
-	public function getMergedConfig($dashboard_id, $uid)
+	public function getMergedUserConfig($dashboard_id, $uid)
 	{
-		$defaultconfig = $this->getDefaultConfig($dashboard_id, $uid);
-		$userconfig = $this->getUserConfig($dashboard_id, $uid);
+		$defaultconfig = $this->getUserBaseConfig($dashboard_id);
+		$userconfig = $this->getUserOverrideConfig($dashboard_id, $uid);
 		
-		$mergedconfig = array_replace_recursive($defaultconfig, $userconfig);
+		$sourceconfig = array_map(function ($value) {
+			return ['source' => $value['source']];
+		}, $defaultconfig);
+		
+		$mergedconfig = array_replace_recursive($defaultconfig, $userconfig, $sourceconfig);
 		
 		return $mergedconfig;
 	}
 	
-	public function getDefaultConfig($dashboard_id, $uid)
+	protected function getUserBaseConfig($dashboard_id)
 	{
-		$res_presets = $this->_ci->DashboardPresetModel->getPresets($dashboard_id, $uid);
+		$funktion_kurzbzs = [];
+		$rights = $this->_ci->permissionlib->getAccessRights();
+		if ($rights)
+			$funktion_kurzbzs = array_unique(array_map(function ($right) {
+				return $right->funktion_kurzbz;
+			}, $rights));
+		
+		$this->_ci->DashboardPresetModel->db
+			->group_start()
+				->where_in('funktion_kurzbz', $funktion_kurzbzs)
+				->or_where('funktion_kurzbz IS NULL')
+			->group_end();
+
+		$this->_ci->DashboardPresetModel->addOrder('funktion_kurzbz', 'DESC');
+		
+		$result = $this->_ci->DashboardPresetModel->loadWhere([
+			'dashboard_id' => $dashboard_id
+		]);
 		$defaultconfig = array();
 		
-		if (hasData($res_presets))
+		if (hasData($result))
 		{
-			$presets = getData($res_presets);
+			$presets = getData($result);
 			foreach ($presets as $presetobj)
 			{
 				$preset = json_decode($presetobj->preset, true);
 				if (null !== $preset)
 				{
-					$defaultconfig = array_replace_recursive($defaultconfig, $preset);
+					$preset = array_map(function ($value) use ($presetobj) {
+						$value['source'] = $presetobj->funktion_kurzbz ?: self::SECTION_IF_FUNKTION_KURZBZ_IS_NULL;
+						return $value;
+					}, $preset);
+					$defaultconfig = array_merge_recursive($defaultconfig, $preset);
 				}
 			}
 		}
@@ -78,7 +105,7 @@ class DashboardLib
 		return $defaultconfig;
 	}
 	
-	public function getUserConfig($dashboard_id, $uid)
+	protected function getUserOverrideConfig($dashboard_id, $uid)
 	{
 		$res_userconfig = $this->_ci->DashboardOverrideModel->getOverride($dashboard_id, $uid);
 		
@@ -107,7 +134,7 @@ class DashboardLib
 		$emptyoverride = new stdClass();
 		$emptyoverride->dashboard_id = $dashboard->dashboard_id;
 		$emptyoverride->uid = $uid;
-		$emptyoverride->override = '{"' . self::USEROVERRIDE_SECTION . '": {"widgets":{}}, "custom": { "widgets" : {}}}';
+		$emptyoverride->override = '[]';
 		
 		return $emptyoverride;
 	}
@@ -126,8 +153,7 @@ class DashboardLib
 		$emptypreset = new stdClass();
 		$emptypreset->dashboard_id = $dashboard->dashboard_id;
 		$emptypreset->funktion_kurzbz = $funktion_kurzbz;
-		$section = ($funktion_kurzbz !== null) ? $funktion_kurzbz : self::SECTION_IF_FUNKTION_KURZBZ_IS_NULL;
-		$emptypreset->preset = '{"' . $section . '": { "widgets" : {}},"custom": { "widgets" : {}}}';
+		$emptypreset->preset = '[]';
 		
 		return $emptypreset;
 	}
@@ -137,8 +163,10 @@ class DashboardLib
 		$dashboard = $this->getDashboardByKurzbz($dashboard_kurzbz);
 		
 		$funktion_kurzbz = ($section === self::SECTION_IF_FUNKTION_KURZBZ_IS_NULL) ? null : $section;
-		$result = $this->_ci->DashboardPresetModel
-			->getPresetByDashboardAndFunktion($dashboard->dashboard_id, $funktion_kurzbz);
+		$result = $this->_ci->DashboardPresetModel->loadWhere([
+			'dashboard_id' => $dashboard->dashboard_id,
+			'funktion_kurzbz' => $funktion_kurzbz
+		]);
 		
 		if (hasData($result))
 		{
@@ -190,44 +218,4 @@ class DashboardLib
 		
 		return $result;
 	}
-
-	public function addWidgetsToWidgets(&$widgets, $dashboard_kurzbz, $section, $addwigets)
-	{
-		foreach ($addwigets as $widget)
-		{
-			if(!isset($widget->widgetid))
-			{
-				$widget->widgetid = $this->generateWidgetId($dashboard_kurzbz);
-			}
-			$this->addWidgetToWidgets($widgets, $section, $widget, $widget->widgetid);
-		}
-	}
-	
-	public function addWidgetToWidgets(&$widgets, $section, $widget, $widgetid)
-	{
-		$section = ($section !== null) ? $section : self::SECTION_IF_FUNKTION_KURZBZ_IS_NULL;
-		if (!isset($widgets[$section]) || !isset($widgets[$section]["widgets"]) || !is_array($widgets[$section]))
-		{
-			$widgets[$section] = array();
-			$widgets[$section]["widgets"] = array();
-		}
-		
-		$widgets[$section]["widgets"][$widgetid] = $widget;
-	}
-	
-	public function removeWidgetFromWidgets(&$widgets, $section, $widgetid)
-	{
-		$section = ($section !== null) ? $section : self::SECTION_IF_FUNKTION_KURZBZ_IS_NULL;
-		if (isset($widgets[$section]) && isset($widgets[$section]["widgets"][$widgetid]))
-		{
-			unset($widgets[$section]["widgets"][$widgetid]);
-			if(empty($widgets[$section]["widgets"]) && $section !== self::USEROVERRIDE_SECTION) {
-				unset($widgets[$section]);
-			}
-			return true;
-		}
-		else {
-			return false;
-		}
-	}
 }

application/libraries/sabredav/SabreDAVAuthLib.php

@@ -0,0 +1,38 @@
+<?php
+
+class SabreDAVAuthLib extends \Sabre\DAV\Auth\Backend\AbstractBasic
+{
+	private $_ci;
+	protected $currentUser = null;
+
+	public function __construct()
+	{
+		$this->_ci =& get_instance();
+		
+		$this->_ci->load->library('AuthLib', array(false));
+		$this->_ci->load->helper('hlp_authentication');
+	}
+
+	public function getCurrentUser()
+	{
+		if ($this->currentUser)
+			return $this->currentUser;
+
+		if (isLogged())
+			return getAuthUID();
+
+		return null;
+	}
+
+	protected function validateUserPass($username, $password)
+	{
+		if (isSuccess($this->_ci->authlib->checkUserAuthByUsernamePassword($username, $password)))
+		{
+			$this->currentUser = $username;
+			return true;
+		}
+
+		$this->currentUser = null;
+		return false;
+	}
+}

application/libraries/sabredav/SabreDAVCalDAVLib.php

@@ -0,0 +1,11 @@
+<?php
+
+require_once __DIR__.'/caldav/SabreDAVACLPrincipalBackend.php';
+require_once __DIR__.'/caldav/SabreDAVCalDAVBackend.php';
+
+/**
+ * Loads the SabreDAV CalDAV classes for the LVPlan calendar endpoint.
+ */
+class SabreDAVCalDAVLib
+{
+}

application/libraries/sabredav/caldav/SabreDAVACLPrincipalBackend.php

@@ -0,0 +1,179 @@
+<?php
+
+/**
+ * PDO principal backend
+ *
+ * This is a simple principal backend that maps exactly to the users table, as
+ * used by Sabre_DAV_Auth_Backend_PDO.
+ *
+ * It assumes all principals are in a single collection. The default collection
+ * is 'principals/', but this can be overriden.
+ *
+ * @package Sabre
+ * @subpackage DAVACL
+ * @copyright Copyright (C) 2007-2011 Rooftop Solutions. All rights reserved.
+ * @author Evert Pot (http://www.rooftopsolutions.nl/)
+ * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
+ */
+class SabreDAVACLPrincipalBackend implements \Sabre\DAVACL\PrincipalBackend\BackendInterface
+{
+    /**
+     * PDO table name for 'principals'
+     *
+     * @var string
+     */
+    protected $tableName;
+
+    /**
+     * PDO table name for 'group members'
+     *
+     * @var string
+     */
+    protected $groupMembersTableName;
+
+	protected $result_ma;
+	protected $auth;
+    /**
+     * Sets up the backend.
+     *
+     * @param PDO $pdo
+     * @param string $tableName
+     */
+    public function __construct($auth)
+	{
+		$this->auth = $auth;
+
+		/*
+		$ma = new mitarbeiter();
+		$this->result_ma = $ma->getMitarbeiter(null,null,null);
+		*/
+    }
+
+	/**
+	 * Liefert den eingeloggten User
+	 */
+	function getUser()
+	{
+		return $this->auth->getCurrentUser();
+	}
+
+
+    /**
+     * Returns a list of principals based on a prefix.
+     *
+     * This prefix will often contain something like 'principals'. You are only
+     * expected to return principals that are in this base path.
+     *
+     * You are expected to return at least a 'uri' for every user, you can
+     * return any additional properties if you wish so. Common properties are:
+     *   {DAV:}displayname
+     *   {http://sabredav.org/ns}email-address - This is a custom SabreDAV
+     *     field that's actualy injected in a number of other properties. If
+     *     you have an email address, use this property.
+     *
+     * @param string $prefixPath
+     * @return array
+     */
+    public function getPrincipalsByPrefix($prefixPath)
+	{
+		//$prefixPath = principals
+		//error_log('Principal.php/getPrincipalsByPrefix('.$prefixPath.')');
+        $principals = array();
+		$user = $this->getUser();
+
+		if($prefixPath=='principals')
+		{
+
+		    $principals[] = array(
+					'id' => $user,
+		            'uri' => 'principals/'.$user,
+		            '{DAV:}displayname' => $user,
+		            '{http://sabredav.org/ns}email-address' => $user.'@example.com',
+		        );
+		}
+
+        return $principals;
+
+    }
+
+    /**
+     * Returns a specific principal, specified by it's path.
+     * The returned structure should be the exact same as from
+     * getPrincipalsByPrefix.
+     *
+     * @param string $path
+     * @return array
+     */
+    public function getPrincipalByPath($path)
+	{
+		$user = mb_substr($path,11);
+
+        $result = array(
+            'id'  => $user,
+            'uri' => 'principals/'.$user,
+            '{DAV:}displayname' => $user,
+            '{http://sabredav.org/ns}email-address' => $user.'@example.com',
+        );
+
+		return $result;
+    }
+
+    /**
+     * Returns the list of members for a group-principal
+     *
+     * @param string $principal
+     * @return array
+     */
+    public function getGroupMemberSet($principal)
+	{
+        $result = array();
+
+		return $result;
+    }
+
+    /**
+     * Returns the list of groups a principal is a member of
+     *
+     * @param string $principal
+     * @return array
+     */
+    public function getGroupMembership($principal)
+	{
+		$result = array();
+		if(preg_match('/^principals\/[0-9A-Za-z\-]*$/',$principal))
+		{
+			$user = mb_substr($principal,11);
+		}
+        return $result;
+
+    }
+
+    /**
+     * Updates the list of group members for a group principal.
+     *
+     * The principals should be passed as a list of uri's.
+     *
+     * @param string $principal
+     * @param array $members
+     * @return void
+     */
+    public function setGroupMemberSet($principal, array $members)
+	{
+		throw new \Sabre\DAV\Exception('Not implemented');
+    }
+
+   public function updatePrincipal($path, \Sabre\DAV\PropPatch $propPatch)
+   {
+	$propPatch->setRemainingResultCode(403);
+   }
+
+	public function searchPrincipals($prefixPath, array $searchProperties, $test = 'allof')
+	{
+		return array();
+	}
+
+	public function findByUri($uri, $principalPrefix)
+	{
+		return null;
+	}
+}

application/libraries/sabredav/caldav/SabreDAVCalDAVBackend.php

@@ -0,0 +1,574 @@
+<?php
+
+/**
+ * CalDAV backend
+ */
+class SabreDAVCalDAVBackend extends \Sabre\CalDAV\Backend\AbstractBackend
+{
+	protected $auth;
+
+	protected $CI;
+
+	CONST CALENDAR_NAME = 'LVPlan';
+	CONST CAL_CATEGORY_STUNDENPLAN = 'Stundenplan';
+	CONST CAL_CATEGORY_STUNDENPLAN_EXAM = 'StundenplanExam';
+	CONST CAL_CATEGORY_STUNDENPLAN_REMOTE = 'StundenplanRemote';
+
+	CONST CAL_CATEGORY_STUNDENPLAN_EXAM_ICON = '📝';
+	CONST CAL_CATEGORY_STUNDENPLAN_REMOTE_ICON = '📍';
+	CONST CAL_CATEGORY_RESERVATION_ICON = '📌';
+	/**
+     * Creates the backend
+     *
+     * @param AuthBackend $auth
+     */
+    public function __construct($auth)
+	{
+		$this->auth = $auth;
+
+		$this->CI =& get_instance();
+    }
+
+	/**
+	 * Liefert den eingeloggten User
+	 */
+	function getUser()
+	{
+		return $this->auth->getCurrentUser();
+	}
+
+    /**
+     * Returns a list of calendars for a principal.
+     *
+     * Every project is an array with the following keys:
+     *  * id, a unique id that will be used by other functions to modify the
+     *    calendar. This can be the same as the uri or a database key.
+     *  * uri, which the basename of the uri with which the calendar is
+     *    accessed.
+     *  * principalUri. The owner of the calendar. Almost always the same as
+     *    principalUri passed to this method.
+     *
+     * Furthermore it can contain webdav properties in clark notation. A very
+     * common one is '{DAV:}displayname'.
+     *
+     * @param string $principalUri
+     * @return array
+     */
+    public function getCalendarsForUser($principalUri)
+	{
+		$user = mb_substr($principalUri,11);
+        $calendars = array();
+		$calendar = array(
+			'id' => $user,
+			'uri' => self::CALENDAR_NAME.'-'.$user,
+			'principaluri' => 'principals/'.$user,
+			'{' . \Sabre\CalDAV\Plugin::NS_CALENDARSERVER . '}getctag' => $this->buildCalendarCtag($user),
+			'{' . \Sabre\CalDAV\Plugin::NS_CALDAV . '}supported-calendar-component-set' => new \Sabre\CalDAV\Xml\Property\SupportedCalendarComponentSet(array('VEVENT')),
+			'{DAV:}displayname'                          => self::CALENDAR_NAME,
+			'{urn:ietf:params:xml:ns:caldav}calendar-description' => 'description comes here',
+			'{urn:ietf:params:xml:ns:caldav}calendar-timezone'    => 'Europe/Vienna',
+			'{http://apple.com/ns/ical/}calendar-order'  => '1',
+			'{http://apple.com/ns/ical/}calendar-color'  => '#FF0000',
+			'{http://sabredav.org/ns}read-only' => 1
+        );
+		$calendars[] = $calendar;
+
+        return $calendars;
+    }
+
+    /**
+     * Creates a new calendar for a principal.
+     *
+     * If the creation was a success, an id must be returned that can be used to reference
+     * this calendar in other methods, such as updateCalendar
+     *
+     * @param string $principalUri
+     * @param string $calendarUri
+     * @param array $properties
+     */
+    public function createCalendar($principalUri,$calendarUri, array $properties)
+	{
+		return $calendarUri;
+    }
+
+    /**
+     * Updates properties for a calendar.
+     *
+     * The mutations array uses the propertyName in clark-notation as key,
+     * and the array value for the property value. In the case a property
+     * should be deleted, the property value will be null.
+     *
+     * This method must be atomic. If one property cannot be changed, the
+     * entire operation must fail.
+     *
+     * If the operation was successful, true can be returned.
+     * If the operation failed, false can be returned.
+     *
+     * Deletion of a non-existant property is always succesful.
+     *
+     * Lastly, it is optional to return detailed information about any
+     * failures. In this case an array should be returned with the following
+     * structure:
+     *
+     * array(
+     *   403 => array(
+     *      '{DAV:}displayname' => null,
+     *   ),
+     *   424 => array(
+     *      '{DAV:}owner' => null,
+     *   )
+     * )
+     *
+     * In this example it was forbidden to update {DAV:}displayname.
+     * (403 Forbidden), which in turn also caused {DAV:}owner to fail
+     * (424 Failed Dependency) because the request needs to be atomic.
+     *
+     * @param string $calendarId
+     * @param array $mutations
+     * @return bool|array
+     */
+    public function updateCalendar($calendarId, \Sabre\DAV\PropPatch $propPatch)
+	{
+        $propPatch->setRemainingResultCode(200);
+    }
+
+    /**
+     * Delete a calendar and all it's objects
+     *
+     * @param string $calendarId
+     * @return void
+     */
+    public function deleteCalendar($calendarId)
+	{
+		return null;
+    }
+
+
+	public function getCalendarData($userUID, $objectUri=null)
+	{
+		$this->CI->load->model("ressource/Mitarbeiter_model", "MitarbeiterModel");
+		$this->CI->load->model("person/Benutzer_model", "BenutzerModel");
+
+		$user = $this->CI->BenutzerModel->loadWhere(array("uid" => $userUID));
+		if(!$user)
+			die('User invalid');
+
+		$this->CI->load->library('KalenderLib', ['uid' => $userUID]);
+
+		$isUserEmployeeResult = $this->CI->MitarbeiterModel->isMitarbeiter($userUID);
+		if (isError($isUserEmployeeResult)) {
+			return;
+		}
+		$isUserEmployee = getData($isUserEmployeeResult);
+
+		$startDate = date('Y-m-d', mktime(0,0,0,date('m'),date('d')-14,date('Y')));
+		$endDate = date('Y-m-d', mktime(0,0,0,date('m')+6,date('d'),date('Y')));
+
+		$data = [];
+
+		if ($isUserEmployee) {
+			$data = $this->CI->kalenderlib->getPlanForLecturerByLecturer($startDate, $endDate, $userUID);
+		} else {
+			$data = $this->CI->kalenderlib->getPlanForStudentByStudent($startDate, $endDate, $userUID);
+		}
+
+		if(!is_array($data))
+			$data = array();
+
+		foreach($data as $item)
+		{
+			$item->calendarDataFragment = $this->buildCalendarDataFragment($item);
+		}
+
+		if (is_null($objectUri))
+		{
+			return $data;
+		}
+
+		$normalizedObjectUri = $this->normalizeObjectUri($objectUri);
+		foreach($data as $row)
+		{
+			if(md5($row->eindeutige_kalender_gruppen_id) == $normalizedObjectUri)
+			{
+				return $row;
+			}
+		}
+
+		return null;
+	}
+
+	public function makeCal($event)
+	{
+		return $this->buildICalLine('BEGIN', 'VCALENDAR')
+			.$this->buildICalLine('VERSION', '2.0')
+			.$this->buildICalTextLine('PRODID', 'FH Technikum Wien')
+			.$this->buildICalLine('BEGIN', 'VTIMEZONE')
+			.$this->buildICalLine('TZID', 'Europe/Vienna')
+			.$this->buildICalLine('BEGIN', 'DAYLIGHT')
+			.$this->buildICalLine('TZOFFSETFROM', '+0100')
+			.$this->buildICalLine('RRULE', 'FREQ=YEARLY;BYMONTH=3;BYDAY=-1SU')
+			.$this->buildICalLine('DTSTART', '19810329T020000')
+			.$this->buildICalLine('TZNAME', 'GMT+02:00')
+			.$this->buildICalLine('TZOFFSETTO', '+0200')
+			.$this->buildICalLine('END', 'DAYLIGHT')
+			.$this->buildICalLine('BEGIN', 'STANDARD')
+			.$this->buildICalLine('TZOFFSETFROM', '+0200')
+			.$this->buildICalLine('RRULE', 'FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU')
+			.$this->buildICalLine('DTSTART', '19961027T030000')
+			.$this->buildICalLine('TZNAME', 'GMT+01:00')
+			.$this->buildICalLine('TZOFFSETTO', '+0100')
+			.$this->buildICalLine('END', 'STANDARD')
+			.$this->buildICalLine('END', 'VTIMEZONE')
+			.$event
+			.$this->buildICalLine('END', 'VCALENDAR');
+	}
+
+	protected function buildCalendarDataFragment($item)
+	{
+		$summaryIcon = '';
+		$summary = $item->type == 'reservierung' ? $item->titel : $item->topic;
+
+		$description = "";
+		if ($item->type == 'reservierung') {
+			$description = $item->beschreibung;
+		} else {
+			$description = $item->lehrfach_bez . "\r\n";
+
+			if (isset($item->lektor) && is_array($item->lektor) && count($item->lektor) > 0) {
+				$description .= "Lektor*in: " . join(", ", array_map(function($teacher) { return $teacher["kurzbz"]; }, $item->lektor)) . "\r\n";
+			}
+		}
+
+
+		$category = self::CAL_CATEGORY_STUNDENPLAN;
+		if ($item->type === 'lehreinheit') {
+			if ($item->lehrform === 'EXAM') {
+				$summaryIcon = self::CAL_CATEGORY_STUNDENPLAN_EXAM_ICON;
+				$category = self::CAL_CATEGORY_STUNDENPLAN_EXAM;
+			} else if (!isset($item->ko_ort_kurzbz) || $item->ko_ort_kurzbz === '') {
+				$summaryIcon = self::CAL_CATEGORY_STUNDENPLAN_REMOTE_ICON;
+				$category = self::CAL_CATEGORY_STUNDENPLAN_REMOTE;
+			}
+		} else if ($item->type === 'reservierung' && (!isset($item->ko_ort_kurzbz) || $item->ko_ort_kurzbz === '')) {
+			$summaryIcon = self::CAL_CATEGORY_RESERVATION_ICON;
+			$category = self::CAL_CATEGORY_STUNDENPLAN_REMOTE;
+		}
+		
+		if ($summaryIcon !== '') {
+			$summary = $summaryIcon . ' ' . $summary;
+		}
+
+		$parsedStartDate = $this->formatICalLocalDateTime($item->isostart);
+		$parsedEndDate = $this->formatICalLocalDateTime($item->isoend);
+		$lastModified = $this->formatICalUtcDateTime(isset($item->updateamum) ? $item->updateamum : null);
+		$dtStamp = $lastModified ?: $this->formatICalUtcDateTime($item->isostart);
+
+		if($dtStamp === null)
+			$dtStamp = '19700101T000000Z';
+
+		$fragment = $this->buildICalLine('BEGIN', 'VEVENT')
+			.$this->buildICalTextLine('UID', $item->eindeutige_kalender_gruppen_id)
+			.$this->buildICalLine('SEQUENCE', (int)$item->kalender_id)
+			.$this->buildICalTextLine('SUMMARY', $summary)
+			.$this->buildICalTextLine('DESCRIPTION', $description)
+			.$this->buildICalTextLine('LOCATION', isset($item->ort_kurzbz) ? $item->ort_kurzbz : '')
+			.$this->buildICalTextLine('CATEGORIES', $category)
+			.$this->buildICalLine('DTSTART', $parsedStartDate, array('TZID' => 'Europe/Vienna'))
+			.$this->buildICalLine('DTEND', $parsedEndDate, array('TZID' => 'Europe/Vienna'));
+
+		if($lastModified !== null)
+			$fragment .= $this->buildICalLine('LAST-MODIFIED', $lastModified);
+
+		return $fragment
+			.$this->buildICalLine('DTSTAMP', $dtStamp)
+			.$this->buildICalLine('END', 'VEVENT');
+	}
+
+	protected function buildCalendarCtag($userUID)
+	{
+		$data = $this->getCalendarData($userUID);
+		if(!is_array($data))
+			$data = array();
+
+		$fragments = array();
+		foreach($data as $row)
+		{
+			$lastModified = isset($row->updateamum) ? $this->getLastModifiedTimestamp($row->updateamum) : null;
+			$calendarData = isset($row->calendarDataFragment) ? $this->makeCal($row->calendarDataFragment) : '';
+			$fragments[] = $this->getObjectUri($row).':'.$lastModified.':'.md5($calendarData);
+		}
+
+		sort($fragments, SORT_STRING);
+		return self::CALENDAR_NAME.'-'.$userUID.'-'.md5(implode('|', $fragments));
+	}
+
+	protected function buildICalTextLine($name, $value, array $parameters = array())
+	{
+		return $this->buildICalLine($name, $this->escapeICalText($value), $parameters);
+	}
+
+	protected function buildICalLine($name, $value, array $parameters = array())
+	{
+		$line = strtoupper($name);
+
+		foreach($parameters as $parameterName => $parameterValue)
+		{
+			$parameterValues = is_array($parameterValue) ? $parameterValue : array($parameterValue);
+			$escapedValues = array();
+
+			foreach($parameterValues as $singleParameterValue)
+				$escapedValues[] = $this->escapeICalParameterValue($singleParameterValue);
+
+			$line .= ';'.strtoupper($parameterName).'='.implode(',', $escapedValues);
+		}
+
+		return $this->foldICalLine($line.':'.(string)$value);
+	}
+
+	protected function foldICalLine($line)
+	{
+		$line = (string)$line;
+		$folded = '';
+
+		while(strlen($line) > 75)
+		{
+			$part = mb_strcut($line, 0, 75, 'UTF-8');
+			$folded .= $part."\r\n";
+			$line = ' '.mb_strcut($line, strlen($part), strlen($line) - strlen($part), 'UTF-8');
+		}
+
+		return $folded.$line."\r\n";
+	}
+
+	protected function escapeICalText($value)
+	{
+		$value = (string)$value;
+		$value = str_replace('\\', '\\\\', $value);
+		$value = str_replace(array("\r\n", "\r", "\n"), '\n', $value);
+		return str_replace(array(';', ','), array('\;', '\,'), $value);
+	}
+
+	protected function escapeICalParameterValue($value)
+	{
+		$value = (string)$value;
+		$value = str_replace(array('\\', '"', "\r", "\n"), array('\\\\', '\"', '', ''), $value);
+
+		if(preg_match('/[;:,]/', $value))
+			return '"'.$value.'"';
+
+		return $value;
+	}
+
+	protected function formatICalLocalDateTime($dateTime)
+	{
+		$dateTime = $this->createDateTime($dateTime);
+		if($dateTime === null)
+			return null;
+
+		$dateTime->setTimezone(new DateTimeZone('Europe/Vienna'));
+		return $dateTime->format('Ymd\THis');
+	}
+
+	protected function formatICalUtcDateTime($dateTime)
+	{
+		$dateTime = $this->createDateTime($dateTime);
+		if($dateTime === null)
+			return null;
+
+		$dateTime->setTimezone(new DateTimeZone('UTC'));
+		return $dateTime->format('Ymd\THis\Z');
+	}
+
+	protected function createDateTime($dateTime)
+	{
+		if($dateTime instanceof DateTime)
+			return clone $dateTime;
+
+		if($dateTime === null || $dateTime === '')
+			return null;
+
+		try
+		{
+			if(is_numeric($dateTime))
+				return new DateTime('@'.(int)$dateTime);
+
+			return new DateTime($dateTime);
+		}
+		catch(Exception $e)
+		{
+			return null;
+		}
+	}
+
+	protected function getObjectUri($row)
+	{
+		return md5($row->eindeutige_kalender_gruppen_id).'.ics';
+	}
+
+	protected function normalizeObjectUri($objectUri)
+	{
+		$normalizedObjectUri = (string)$objectUri;
+
+		if(substr($normalizedObjectUri, -4) === '.ics')
+			$normalizedObjectUri = substr($normalizedObjectUri, 0, -4);
+
+		if(mb_strpos($normalizedObjectUri, '@') !== false)
+			$normalizedObjectUri = mb_substr($normalizedObjectUri, mb_strpos($normalizedObjectUri, '@') + 1);
+
+		if($this->hasObjectUriDatePrefix($normalizedObjectUri))
+			return mb_substr($normalizedObjectUri, mb_strpos($normalizedObjectUri, '-') + 1);
+
+		return $normalizedObjectUri;
+	}
+
+	protected function hasObjectUriDatePrefix($objectUri)
+	{
+		$hyphenPosition = mb_strpos($objectUri, '-');
+		if($hyphenPosition !== 15)
+			return false;
+
+		return preg_match('/^\d{8}T\d{6}$/', mb_substr($objectUri, 0, 15)) === 1;
+	}
+
+	protected function buildCalendarObject($row, $calendarId)
+	{
+		$calendarData = $this->makeCal($row->calendarDataFragment);
+
+		return array(
+			"id"=>$row->eindeutige_kalender_gruppen_id,
+			"calendardata"=>$calendarData,
+			"uri"=>$this->getObjectUri($row),
+			"lastmodified"=>$this->getLastModifiedTimestamp($row->updateamum),
+			"etag"=>'"'.md5($calendarData).'"',
+			"calendarid"=>$calendarId,
+			"size"=>strlen($calendarData),
+			"component"=>'vevent'
+		);
+	}
+
+	protected function getLastModifiedTimestamp($lastModified)
+	{
+		if($lastModified === null || $lastModified === '')
+			return null;
+
+		if(is_numeric($lastModified))
+			return (int)$lastModified;
+
+		$timestamp = strtotime($lastModified);
+		if($timestamp === false)
+			return null;
+
+		return $timestamp;
+	}
+
+    /**
+     * Returns all calendar objects within a calendar.
+     *
+     * Every item contains an array with the following keys:
+     *   * id - unique identifier which will be used for subsequent updates
+     *   * calendardata - The iCalendar-compatible calnedar data
+     *   * uri - a unique key which will be used to construct the uri. This can be any arbitrary string.
+     *   * lastmodified - a timestamp of the last modification time
+     *   * etag - An arbitrary string, surrounded by double-quotes. (e.g.:
+     *   '  "abcdef"')
+     *   * calendarid - The calendarid as it was passed to this function.
+     *
+     * Note that the etag is optional, but it's highly encouraged to return for
+     * speed reasons.
+     *
+     * The calendardata is also optional. If it's not returned
+     * 'getCalendarObject' will be called later, which *is* expected to return
+     * calendardata.
+     *
+     * @param string $calendarId
+     * @return array
+     */
+    public function getCalendarObjects($calendarId)
+	{
+		//$user = $this->getUser();
+		$user = $calendarId;
+		$data = $this->getCalendarData($user);
+
+		//error_log("Caldav_Backend.php/getCalendarObjects($calendarId) ");
+		$return  = array();
+
+		if(!is_array($data))
+			return $return;
+
+		foreach($data as $row)
+		{
+			$return[] = $this->buildCalendarObject($row, $calendarId);
+		}
+		return $return;
+    }
+
+    /**
+     * Returns information from a single calendar object, based on it's object
+     * uri.
+     *
+     * The returned array must have the same keys as getCalendarObjects. The
+     * 'calendardata' object is required here though, while it's not required
+     * for getCalendarObjects.
+     *
+     * @param string $calendarId
+     * @param string $objectUri
+     * @return array
+     */
+    public function getCalendarObject($calendarId,$objectUri)
+	{
+		$user = $calendarId;
+		$data = $this->getCalendarData($user,$objectUri);
+
+		if(empty($data))
+		{
+			return null;
+		}
+		elseif(is_object($data))
+		{
+			$ret = $this->buildCalendarObject($data, $calendarId);
+		}
+
+		return isset($ret) ? $ret : null;
+    }
+
+    /**
+     * Creates a new calendar object.
+     *
+     * @param string $calendarId
+     * @param string $objectUri
+     * @param string $calendarData
+     * @return void
+     */
+    public function createCalendarObject($calendarId,$objectUri,$calendarData)
+	{
+		return null;
+    }
+
+    /**
+     * Updates an existing calendarobject, based on it's uri.
+     *
+     * @param string $calendarId
+     * @param string $objectUri
+     * @param string $calendarData
+     * @return void
+     */
+    public function updateCalendarObject($calendarId,$objectUri,$calendarData)
+	{
+		if(is_resource($calendarData))
+			$calendarData = stream_get_contents($calendarData);
+
+		return '"'.md5((string)$calendarData).'"';
+    }
+
+    /**
+     * Deletes an existing calendar object.
+     *
+     * @param string $calendarId
+     * @param string $objectUri
+     * @return void
+     */
+    public function deleteCalendarObject($calendarId,$objectUri)
+	{
+		return null;
+    }
+}

application/libraries/sabredav/caldav/read_only_calendar/SabreDAVReadOnlyACL.php

@@ -0,0 +1,36 @@
+<?php
+
+class SabreDAVReadOnlyACL
+{
+	public static function getAcl($principalUri, $includeFreeBusy = false)
+	{
+		$acl = array(
+			array(
+				'privilege' => '{DAV:}read',
+				'principal' => $principalUri,
+				'protected' => true,
+			),
+			array(
+				'privilege' => '{DAV:}read',
+				'principal' => $principalUri.'/calendar-proxy-read',
+				'protected' => true,
+			),
+		);
+
+		if($includeFreeBusy)
+		{
+			$acl[] = array(
+				'privilege' => '{'.\Sabre\CalDAV\Plugin::NS_CALDAV.'}read-free-busy',
+				'principal' => '{DAV:}authenticated',
+				'protected' => true,
+			);
+		}
+
+		return $acl;
+	}
+
+	public static function ignoreWrite()
+	{
+		return null;
+	}
+}

application/libraries/sabredav/caldav/read_only_calendar/SabreDAVReadOnlyCalendar.php

@@ -0,0 +1,80 @@
+<?php
+
+class SabreDAVReadOnlyCalendar extends \Sabre\CalDAV\Calendar
+{
+	protected $readOnlyCaldavBackend;
+	protected $readOnlyCalendarInfo;
+
+	public function __construct(\Sabre\CalDAV\Backend\BackendInterface $caldavBackend, $calendarInfo)
+	{
+		parent::__construct($caldavBackend, $calendarInfo);
+		$this->readOnlyCaldavBackend = $caldavBackend;
+		$this->readOnlyCalendarInfo = $calendarInfo;
+	}
+
+	public function getChild($name)
+	{
+		$obj = $this->readOnlyCaldavBackend->getCalendarObject($this->readOnlyCalendarInfo['id'], $name);
+
+		if(!$obj)
+			throw new \Sabre\DAV\Exception\NotFound('Calendar object not found');
+
+		$obj['acl'] = $this->getCalendarObjectAcl();
+
+		return new SabreDAVReadOnlyCalendarObject($this->readOnlyCaldavBackend, $this->readOnlyCalendarInfo, $obj);
+	}
+
+	public function getChildren()
+	{
+		$objs = $this->readOnlyCaldavBackend->getCalendarObjects($this->readOnlyCalendarInfo['id']);
+		$children = array();
+
+		foreach($objs as $obj)
+		{
+			$obj['acl'] = $this->getCalendarObjectAcl();
+			$children[] = new SabreDAVReadOnlyCalendarObject($this->readOnlyCaldavBackend, $this->readOnlyCalendarInfo, $obj);
+		}
+
+		return $children;
+	}
+
+	public function createFile($name, $calendarData = null)
+	{
+		return SabreDAVReadOnlyACL::ignoreWrite();
+	}
+
+	public function createDirectory($name)
+	{
+		return SabreDAVReadOnlyACL::ignoreWrite();
+	}
+
+	public function delete()
+	{
+		return SabreDAVReadOnlyACL::ignoreWrite();
+	}
+
+	public function setName($newName)
+	{
+		return SabreDAVReadOnlyACL::ignoreWrite();
+	}
+
+	public function updateProperties($mutations)
+	{
+		return true;
+	}
+
+	public function propPatch(\Sabre\DAV\PropPatch $propPatch)
+	{
+		$propPatch->setRemainingResultCode(200);
+	}
+
+	public function getACL()
+	{
+		return SabreDAVReadOnlyACL::getAcl($this->getOwner(), true);
+	}
+
+	protected function getCalendarObjectAcl()
+	{
+		return SabreDAVReadOnlyACL::getAcl($this->getOwner());
+	}
+}

application/libraries/sabredav/caldav/read_only_calendar/SabreDAVReadOnlyCalendarHome.php

@@ -0,0 +1,57 @@
+<?php
+
+class SabreDAVReadOnlyCalendarHome extends \Sabre\CalDAV\CalendarHome
+{
+	protected $readOnlyCaldavBackend;
+	protected $readOnlyPrincipalInfo;
+
+	public function __construct(\Sabre\CalDAV\Backend\BackendInterface $caldavBackend, $principalInfo)
+	{
+		parent::__construct($caldavBackend, $principalInfo);
+		$this->readOnlyCaldavBackend = $caldavBackend;
+		$this->readOnlyPrincipalInfo = $principalInfo;
+	}
+
+	public function getChildren()
+	{
+		$calendars = $this->readOnlyCaldavBackend->getCalendarsForUser($this->readOnlyPrincipalInfo['uri']);
+		$objs = array();
+
+		foreach($calendars as $calendar)
+		{
+			$objs[] = new SabreDAVReadOnlyCalendar($this->readOnlyCaldavBackend, $calendar);
+		}
+
+		return $objs;
+	}
+
+	public function createExtendedCollection($name, \Sabre\DAV\MkCol $mkCol)
+	{
+		return SabreDAVReadOnlyACL::ignoreWrite();
+	}
+
+	public function createFile($filename, $data = null)
+	{
+		return SabreDAVReadOnlyACL::ignoreWrite();
+	}
+
+	public function createDirectory($filename)
+	{
+		return SabreDAVReadOnlyACL::ignoreWrite();
+	}
+
+	public function delete()
+	{
+		return SabreDAVReadOnlyACL::ignoreWrite();
+	}
+
+	public function setName($name)
+	{
+		return SabreDAVReadOnlyACL::ignoreWrite();
+	}
+
+	public function getACL()
+	{
+		return SabreDAVReadOnlyACL::getAcl($this->readOnlyPrincipalInfo['uri']);
+	}
+}