Merge branch 'master' into feature-19172/Abgabetool_digitale_signatur_pruefen

2026-07-21 17:02:19 +00:00 · 2023-04-17 10:21:09 +02:00
parent 8880e07bf2 9c801d2723
commit 8eb423414a
1109 changed files with 28716 additions and 100283 deletions
@@ -0,0 +1,268 @@
+<?php
+
+/**
+ * FH-Complete
+ *
+ * @package             FHC-Helper
+ * @author              FHC-Team
+ * @copyright           Copyright (c) 2022 fhcomplete.net
+ * @license             GPLv3
+ */
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+class AkteLib
+{
+	const AKTE_KATEGORIE_KURZBZ = 'Akte'; // kategorie_kurzbz of dms when inserting for akte
+
+	private $_ci; // Code igniter instance
+	private $_who; // who added this document
+
+	/**
+	 * Object initialization
+	 */
+	public function __construct($params = null)
+	{
+		$this->_ci =& get_instance();
+
+		// Set the the _who property
+		$this->_who = 'Akte system'; // default
+		// It is possible to set it using the who parameter
+		if (!isEmptyArray($params) && isset($params['who']) && !isEmptyString($params['who'])) $this->_who = $params['who'];
+
+		$this->_ci->load->model('crm/Akte_model', 'AkteModel');
+		$this->_ci->load->model('content/DmsFS_model', 'DmsFSModel');
+
+		$this->_ci->load->library('DmsLib');
+	}
+
+	/**
+	 * Writes a new file, adds a new dms entry with given akte data,
+	 * adds a new dms version 0 for the written file, and adds Akte if dms add was successfull
+	 * Returns success with inserted akte id or error
+	 */
+	public function add(
+		$person_id, $dokument_kurzbz, $titel, $mimetype, $fileHandle, // Required parameters
+		$bezeichnung = null, $archiv = false, $signiert = false, $stud_selfservice = false
+	)
+	{
+		// add new dms entry and new dms version for the Akte, using Akte data (title, mimetype, file content as handle)
+		$dmsAddResult = $this->_ci->dmslib->add($titel, $mimetype, $fileHandle, self::AKTE_KATEGORIE_KURZBZ, $dokument_kurzbz, $bezeichnung);
+
+		if (isError($dmsAddResult)) return $dmsAddResult;
+
+		if (!hasData($dmsAddResult)) return error("Dms document could not be added");
+
+		$dmsAddData = getData($dmsAddResult);
+
+		// insert the Akte
+		return $this->_ci->AkteModel->insert(
+			array(
+				'person_id' => $person_id,
+				'dokument_kurzbz' => $dokument_kurzbz,
+				'titel' => $titel,
+				'mimetype' => $mimetype,
+				'bezeichnung' => $bezeichnung,
+				'erstelltam' => date('Y-m-d'),
+				'dms_id' => $dmsAddData->dms_id,
+				'archiv' => $archiv,
+				'signiert' => $signiert,
+				'stud_selfservice' => $stud_selfservice,
+				'insertamum' => date('Y-m-d H:i:s'),
+				'insertvon' => $this->_who
+			)
+		);
+	}
+
+	/**
+	 * Writes a new file, adds a new dms version 0 for the written file, and updates Akte if dms version add was successfull
+	 * Returns success with updated akte id or error
+	 */
+	public function update($akte_id, $titel, $mimetype, $fileHandle, $bezeichnung = null, $archiv = false, $signiert = false, $stud_selfservice = false)
+	{
+		// check if Akte with dms exists
+		$this->_ci->AkteModel->addSelect('dms_id');
+		$akteResult = $this->_ci->AkteModel->load($akte_id);
+
+		if (isError($akteResult)) return $akteResult;
+
+		if (!hasData($akteResult)) return error("Akte not found");
+
+		$dms_id = getData($akteResult)[0]->dms_id;
+
+		if (isEmptyString($dms_id)) return error("Akte has no dms document");
+
+		// if Akte with dms found, update the last dms version
+		$dmsUpdateResult = $this->_ci->dmslib->updateLastVersion($dms_id, $fileHandle, $titel, $mimetype, $bezeichnung);
+
+		if (isError($dmsUpdateResult)) return $dmsUpdateResult;
+
+		if (!hasData($dmsUpdateResult)) return error("Dms document could not be updated");
+
+		// update the Akte
+		return $this->_ci->AkteModel->update(
+			$akte_id,
+			array(
+				'titel' => $titel,
+				'mimetype' => $mimetype,
+				'bezeichnung' => $bezeichnung,
+				'erstelltam' => date('Y-m-d'),
+				'dms_id' => $dms_id,
+				'archiv' => $archiv,
+				'signiert' => $signiert,
+				'stud_selfservice' => $stud_selfservice,
+				'updateamum' => date('Y-m-d H:i:s'),
+				'updatevon' => $this->_who
+			)
+		);
+	}
+
+	/**
+	 * Gets akte data and associated dms data by akte Id
+	 * Returns success with akte and dms data or error
+	 */
+	public function get($akte_id)
+	{
+		// get Akte data
+		$this->_ci->AkteModel->addSelect('person_id, dokument_kurzbz, mimetype, erstelltam, titel, bezeichnung,
+											gedruckt, uid, dms_id, nachgereicht, nachgereicht_am, anmerkung,
+											ausstellungsnation, formal_geprueft_amum, archiv, signiert,
+											stud_selfservice, akzeptiertamum, insertvon, insertamum, updatevon, updateamum');
+		$this->_ci->AkteModel->load($akte_id);
+		$akteResult = $this->_ci->AkteModel->load($akte_id);
+
+		if (isError($akteResult)) return $akteResult;
+
+		if (!hasData($akteResult)) return error("Akte not found");
+
+		$resultObject = getData($akteResult)[0];
+
+		// set properties with same name in Akte and Dms table
+		$resultObject->akte_mimetype = $resultObject->mimetype;
+
+		// get dms data
+		$dmsResult = $this->_ci->dmslib->getLastVersion($resultObject->dms_id);
+
+		if (isError($dmsResult)) return $dmsResult;
+
+		// properties to retrieve from dms
+		$dmsProperties = array('version', 'filename', 'mimetype', 'name', 'beschreibung', 'cis_suche', 'schlagworte', DmsLib::FILE_CONTENT_PROPERTY);
+
+		// set dms properties
+		if (hasData($dmsResult))
+		{
+			$dmsData = getData($dmsResult);
+
+			foreach ($dmsProperties as $dmsProperty)
+			{
+				$resultObject->{$dmsProperty} = $dmsData->{$dmsProperty};
+			}
+		}
+		else
+		{
+			// set null if no dms result found
+			foreach ($dmsProperties as $dmsProperty)
+			{
+				$resultObject->{$dmsProperty} = null;
+			}
+		}
+
+		// return the object containing akte and dms data
+		return success($resultObject);
+	}
+
+	/**
+	 * Gets Akte data and associated dms data by person Id and dokument_kurzbz
+	 * Returns success with result array with akte and dms data or error
+	 */
+	public function getByPersonIdAndDocumentType($person_id, $dokument_kurzbz)
+	{
+		// load all Akte entries for given person and dokument_kurzbz
+		$this->_ci->AkteModel->addSelect('akte_id');
+		$akteResult = $this->_ci->AkteModel->loadWhere(
+			array(
+				'person_id' => $person_id,
+				'dokument_kurzbz' => $dokument_kurzbz
+			)
+		);
+
+		if (!hasData($akteResult)) return error("Akte not found");
+
+		$akteData = getData($akteResult);
+
+		$resultArr = array();
+
+		// for each found akte entry
+		foreach ($akteData as $akte)
+		{
+			// get dms and akte data from akte Id
+			$getAkteDmsResult = $this->get($akte->akte_id);
+
+			if (isError($getAkteDmsResult)) return $getAkteDmsResult;
+
+			$resultArr[] = getData($getAkteDmsResult);
+		}
+
+		// return all found entries
+		return success($resultArr);
+	}
+
+	/**
+	 * Removes Akte by akte Id, removes all associated dms entries and versions, and deletes all associated files
+	 * Returns success with removed version numbers or error
+	 */
+	public function remove($akte_id)
+	{
+		// get dms_id for akte
+		$this->_ci->AkteModel->addSelect('dms_id');
+		$akteResult = $this->_ci->AkteModel->load($akte_id);
+
+		if (isError($akteResult)) return $akteResult;
+
+		if (!hasData($akteResult)) return error("Akte not found");
+
+		$dms_id = getData($akteResult)[0]->dms_id;
+		$error = null;
+
+		// Start DB transaction to avoid deleting only part of the data
+		$this->_ci->db->trans_begin();
+
+		// delete Akte
+		$deleteResult = $this->_ci->AkteModel->delete($akte_id);
+
+		if (isError($deleteResult))
+		{
+			$error = $deleteResult;
+		}
+		else
+		{
+			// remove all dms entry for dms of the akte
+			$removeAllResult = $this->_ci->dmslib->removeAll($dms_id);
+
+			if (isError($removeAllResult))
+				$error = $removeAllResult;
+		}
+
+		// Transaction complete!
+		$this->_ci->db->trans_complete();
+
+		// Check if everything went ok during the transaction
+		if ($this->_ci->db->trans_status() === false || isset($error))
+		{
+			$this->_ci->db->trans_rollback();
+
+			// return occured error
+			if (isset($error))
+				return $error;
+			else
+				return error("Error occured when deleting, rolled back");
+		}
+		else
+		{
+			$this->_ci->db->trans_commit();
+
+			// return removed dms entry data
+			return $removeAllResult;
+		}
+	}
+}
@@ -80,14 +80,24 @@ class AnrechnungLib
 		// Get latest ZGV
 		$result = $this->ci->PrestudentModel->getLatestZGVBezeichnung($prestudent_id);
 		$latest_zgv_bezeichnung = hasData($result) ? getData($result)[0]->bezeichnung : '';
-		
+
+        // Get Sum of berufliche and schulische ECTS
+        $result = $this->ci->LehrveranstaltungModel->getEctsSumSchulisch($uid, $prestudent_id, $lv->studiengang_kz);
+        $sumEctsSchulisch = getData($result)[0]->ectssumschulisch;
+
+        $result = $this->ci->LehrveranstaltungModel->getEctsSumBeruflich($uid);
+        $sumEctsBeruflich = getData($result)[0]->ectssumberuflich;
+
 		// Set the given studiensemester
 		$antrag_data->lv_id = $lv_id;
 		$antrag_data->lv_bezeichnung = $lv->bezeichnung;
 		$antrag_data->ects = $lv->ects;
+        $antrag_data->sumEctsSchulisch = $sumEctsSchulisch;
+        $antrag_data->sumEctsBeruflich = $sumEctsBeruflich;
 		$antrag_data->studiensemester_kurzbz = $studiensemester_kurzbz;
 		$antrag_data->vorname = $person->vorname;
 		$antrag_data->nachname = $person->nachname;
+		$antrag_data->student_uid = $uid;
 		$antrag_data->matrikelnr = $student->matrikelnr;
        $antrag_data->studiengang_kz = $studiengang->studiengang_kz;
 		$antrag_data->stg_bezeichnung = $studiengang->bezeichnung;
@@ -112,6 +122,7 @@ class AnrechnungLib

 		$anrechnung_data = new StdClass();

+        $this->ci->AnrechnungModel->addJoin('lehre.tbl_anrechnung_begruendung', 'begruendung_id');
 		$result = $this->ci->AnrechnungModel->load($anrechnung_id);

 		if (isError($result))
@@ -145,6 +156,7 @@ class AnrechnungLib
 		$anrechnung_data->prestudent_id = '';
 		$anrechnung_data->lehrveranstaltung = '';
 		$anrechnung_data->begruendung_id = '';
+		$anrechnung_data->begruendung = '';
 		$anrechnung_data->anmerkung = '';
 		$anrechnung_data->dms_id = '';
 		$anrechnung_data->insertamum = '';
@@ -155,6 +167,7 @@ class AnrechnungLib
 		$anrechnung_data->status = getUserLanguage() == 'German' ? 'neu' : 'new';
 		$anrechnung_data->dokumentname = '';

+        $this->ci->AnrechnungModel->addJoin('lehre.tbl_anrechnung_begruendung', 'begruendung_id');
 		$result = $this->ci->AnrechnungModel->loadWhere(
 			array(
 				'lehrveranstaltung_id' => $lehrveranstaltung_id,
@@ -800,6 +813,7 @@ class AnrechnungLib
 		$anrechnung_data->prestudent_id = $anrechnung->prestudent_id;
 		$anrechnung_data->lehrveranstaltung_id = $anrechnung->lehrveranstaltung_id;
 		$anrechnung_data->begruendung_id =  $anrechnung->begruendung_id;
+		$anrechnung_data->begruendung =  $anrechnung->bezeichnung;
 		$anrechnung_data->anmerkung = $anrechnung->anmerkung_student;
 		$anrechnung_data->dms_id = $anrechnung->dms_id;
 		$anrechnung_data->insertamum = (new DateTime($anrechnung->insertamum))->format('d.m.Y');
@@ -823,4 +837,110 @@ class AnrechnungLib

 		return $anrechnung_data;
 	}
+
+    /**
+     * If Student is a Quereinsteiger, get ECTS Summe of all angerechnete Studiensemester.
+     *
+     * @param $prestudent_id
+     * @param $studiengang_kz Studiengang_kz der LV
+     * @return int|mixed
+     */
+    public function getQuereinsteigerEctsSumme($prestudent_id, $studiengang_kz)
+    {
+        $sumEctsQuereinsteiger = 0;
+
+        // Check, if student is Quereinsteiger
+        $this->ci->load->model('crm/Prestudentstatus_model', 'PrestudentstatusModel');
+        $result = $this->ci->PrestudentstatusModel->getFirstStatus($prestudent_id, 'Student');
+
+        $prestudentFirstStudentStatus = getData($result)[0];
+
+        // If Prestudent is not a Quereinsteiger
+        if ($prestudentFirstStudentStatus->ausbildungssemester == 1)
+        {
+            return $sumEctsQuereinsteiger; // return 0
+        }
+
+        $anzahlAngerechneteStudiensemester = $prestudentFirstStudentStatus->ausbildungssemester - 1;
+
+        // If Prestudent is a Quereinsteiger
+        if ($prestudentFirstStudentStatus->ausbildungssemester > 1)
+        {
+            // Get the 'angerechnete Studiensemester'
+            $this->ci->load->model('organisations/Studiensemester_model', 'StudiensemesterModel');
+            $result = $this->ci->StudiensemesterModel->getPreviousFrom(
+                $prestudentFirstStudentStatus->studiensemester_kurzbz,
+                $anzahlAngerechneteStudiensemester
+            );
+
+            // Get ECTS Summe of each 'angerechnetes Studiensemester'
+            foreach (getData($result) as $studiensemester)
+            {
+                $result = $this->ci->LehrveranstaltungModel->getSumQuereinstiegsECTSProSemester(
+                    $studiengang_kz,
+                    $studiensemester->studiensemester_kurzbz,
+                    $anzahlAngerechneteStudiensemester--,
+                    $prestudentFirstStudentStatus->orgform_kurzbz
+                );
+
+                if (hasData($result))
+                {
+                    $sumEctsQuereinsteiger = $sumEctsQuereinsteiger + getData($result)[0]->sum_ects;
+                }
+            }
+        }
+        return $sumEctsQuereinsteiger;  // return sum of ects of all 'angerechnete Studiensemester'
+    }
+
+    /**
+     * Get ECTS Summe of all Anrechnungen based on schulische Kenntnisse.
+     *
+     * @param $student_uid
+     * @return int|mixed
+     */
+    public function getSchulischeAnrechnungenEctsSumme($student_uid)
+    {
+        $sumEctsSchule = 0;
+
+        $result = $this->ci->LehrveranstaltungModel->getSumAngerechneteECTSByBegruendung($student_uid);
+
+        if (hasData($result))
+        {
+            foreach (getData($result) as $ects)
+            {
+                if ($ects->begruendung_id != 4)
+                {
+                    $sumEctsSchule = $sumEctsSchule + $ects->sum;
+                }
+            }
+        }
+
+        return $sumEctsSchule;
+    }
+
+    /**
+     * Get ECTS Summe of all Anrechnungen based on berufliche Kenntnisse.
+     *
+     * @param $student_uid
+     * @return int
+     */
+    public function getBeruflicheAnrechnungenEctsSumme($student_uid)
+    {
+        $sumEctsBeruflich = 0;
+
+        $result = $this->ci->LehrveranstaltungModel->getSumAngerechneteECTSByBegruendung($student_uid);
+
+        if (hasData($result))
+        {
+            foreach (getData($result) as $ects)
+            {
+                if ($ects->begruendung_id == 4)
+                {
+                    $sumEctsBeruflich = $ects->sum;
+                }
+            }
+        }
+
+        return $sumEctsBeruflich;
+    }
 }
@@ -1,26 +1,483 @@
 <?php

+/**
+ * FH-Complete
+ *
+ * @package		FHC-Helper
+ * @author		FHC-Team
+ * @copyright		Copyright (c) 2022 fhcomplete.net
+ * @license		GPLv3
+ */
+
 if (! defined('BASEPATH')) exit('No direct script access allowed');

-class DmsLib extends FHC_Controller
+use \stdClass as stdClass;
+
+class DmsLib
 {
-	const FILE_CONTENT_PROPERTY = 'file_content';
-	
-	private $UPLOAD_PATH = DMS_PATH; // temporary directory to store the upload file
+	const FILE_CONTENT_PROPERTY = 'file_content'; // property name for file content
+
+	private $_ci; // code igniter instance
+	private $_who; // who added this document

 	/**
 	 * Object initialization
 	 */
-	public function __construct()
+	public function __construct($params = null)
 	{
-		$this->ci =& get_instance();
+		$this->_ci =& get_instance();

-		$this->ci->load->model('crm/Akte_model', 'AkteModel');
-		$this->ci->load->model('content/Dms_model', 'DmsModel');
-		$this->ci->load->model('content/DmsVersion_model', 'DmsVersionModel');
-		$this->ci->load->model('content/DmsFS_model', 'DmsFSModel');
+		// Set the the _who property
+		$this->_who = 'DMS system'; // default
+		// It is possible to set it using the who parameter
+		if (!isEmptyArray($params) && isset($params['who']) && !isEmptyString($params['who'])) $this->_who = $params['who'];
+
+		$this->_ci->load->model('crm/Akte_model', 'AkteModel'); // deprecated, should not be used here!
+		$this->_ci->load->model('content/Dms_model', 'DmsModel');
+		$this->_ci->load->model('content/DmsVersion_model', 'DmsVersionModel');
+		$this->_ci->load->model('content/DmsFS_model', 'DmsFSModel');
 	}
-	
+
+	// -----------------------------------------------------------------------------------------------------------
+	// Public methods
+
+	/**
+	 * Writes a new file, adds a new dms entry and a new dms version 0 for the written file
+	 * Returns success info of added dms entry (dms_id, version, filename) or error
+	 */
+	public function add(
+		$name, $mimetype, $fileHandle, // Required parameters
+		$kategorie_kurzbz = null, $dokument_kurzbz = null, $beschreibung = null, $cis_suche = false, $schlagworte = null
+	)
+	{
+			// create unique filename, using original document name to detect file extension
+			$filename = $this->_getUniqueFilename($name);
+
+			// copy file from fileHandle to dms folder
+			$copyFileResult = $this->_copyFile($fileHandle, $filename);
+
+			if (isError($copyFileResult)) return $copyFileResult;
+
+			// if file written successful, insert dms
+			$dmsResult = $this->_ci->DmsModel->insert(
+				array(
+					'kategorie_kurzbz' => $kategorie_kurzbz,
+					'dokument_kurzbz' => $dokument_kurzbz
+				)
+			);
+
+			if (isError($dmsResult)) return $dmsResult;
+
+			if (hasData($dmsResult))
+			{
+				$dms_id = getData($dmsResult);
+				$version = 0;
+
+				// insert dms version
+				$dmsVersion = array(
+					'dms_id' => $dms_id,
+					'version' => $version,
+					'filename' => $filename,
+					'mimetype' => $mimetype,
+					'name' => $name,
+					'beschreibung' => $beschreibung,
+					'cis_suche' => $cis_suche,
+					'schlagworte' => $schlagworte,
+					'insertvon' => $this->_who,
+					'insertamum' => date('Y-m-d H:i:s')
+				);
+
+				$dmsVersionResult = $this->_ci->DmsVersionModel->insert($dmsVersion);
+
+				if (isError($dmsVersionResult)) return $dmsVersionResult;
+
+				// return dms info
+				$resObj = new stdClass();
+				$resObj->dms_id = $dms_id;
+				$resObj->version = $version;
+				$resObj->filename = $filename;
+
+				return success($resObj);
+			}
+			else
+				return error("error when inserting DMS");
+	}
+
+	/**
+	 * Writes a new file with content of fileHandle, adds a new dms version (max version number + 1) for the written file
+	 * Returns success with info of added dms version (version, filename) or error
+	 */
+	public function addNewVersion($dms_id, $fileHandle, $name = null, $mimetype = null, $beschreibung = null, $cis_suche = false, $schlagworte = null)
+	{
+		// get the latest version
+		$lastVersionResult = $this->getLastVersion($dms_id);
+
+		if (isError($lastVersionResult)) return $lastVersionResult;
+
+		if (hasData($lastVersionResult))
+		{
+			$lastVersion = getData($lastVersionResult);
+
+			$originalName = isset($name) ? $name : $lastVersion->name;
+
+			// create unique filename, using original document name to detect file extension
+			$filename = $this->_getUniqueFilename($originalName);
+
+			// copy file from fileHandle to dms folder
+			$copyFileResult = $this->_copyFile($fileHandle, $filename);
+
+			if (isError($copyFileResult)) return $copyFileResult;
+
+			// insert new version
+			$newVersionNumber = $lastVersion->version + 1;
+
+			// if new parameters given, use them, otherwise use parameters from last version
+			$newVersion = array(
+				'dms_id' => $dms_id,
+				'name' => $originalName,
+				'filename' => $filename,
+				'version' => $newVersionNumber,
+				'mimetype' => isset($mimetype) ? $mimetype : $lastVersion->mimetype,
+				'beschreibung' => isset($beschreibung) ? $beschreibung : $lastVersion->beschreibung,
+				'cis_suche' => isset($cis_suche) ? $cis_suche : $lastVersion->cis_suche,
+				'schlagworte' => isset($schlagworte) ? $schlagworte : $lastVersion->schlagworte,
+				'insertvon' => $this->_who,
+				'insertamum' => date('Y-m-d H:i:s')
+			);
+
+			$addVersionResult = $this->_ci->DmsVersionModel->insert($newVersion);
+
+			if (isError($addVersionResult)) return $addVersionResult;
+
+			// return dms info
+			$resObj = new stdClass();
+			$resObj->version = $newVersionNumber;
+			$resObj->filename = $filename;
+
+			return success($resObj);
+		}
+		else
+			return error("last version not found");
+	}
+
+	/**
+	 * Updates the last version (max version number) of a dms entry
+	 * Overwrites the file associated with this version with content read from fileHandle
+	 * Returns success with info of added dms version (version, filename) or error
+	 */
+	public function updateLastVersion($dms_id, $fileHandle, $name = null, $mimetype = null, $beschreibung = null, $cis_suche = false, $schlagworte = null)
+	{
+		// get the latest version
+		$lastVersionResult = $this->getLastVersion($dms_id);
+
+		if (isError($lastVersionResult)) return $lastVersionResult;
+
+		if (hasData($lastVersionResult))
+		{
+			$lastVersion = getData($lastVersionResult);
+			$filename = $lastVersion->filename;
+
+			// update file in filesystem
+			$copyFileResult = $this->_copyFile($fileHandle, $filename);
+
+			if (isError($copyFileResult)) return $copyFileResult;
+
+			// if new parameters given, use them, otherwise use parameters from last version
+			$newVersion = array(
+				'name' => isset($name) ? $name : $lastVersion->name,
+				'filename' => $filename,
+				'mimetype' => isset($mimetype) ? $mimetype : $lastVersion->mimetype,
+				'beschreibung' => isset($beschreibung) ? $beschreibung : $lastVersion->beschreibung,
+				'cis_suche' => isset($cis_suche) ? $cis_suche : $lastVersion->cis_suche,
+				'schlagworte' => isset($schlagworte) ? $schlagworte : $lastVersion->schlagworte,
+			);
+
+			// update last dms version
+			$addVersionResult = $this->_ci->DmsVersionModel->update(
+				array($dms_id, $lastVersion->version),
+				$newVersion
+			);
+
+			if (isError($addVersionResult)) return $addVersionResult;
+
+			// return dms info
+			$resObj = new stdClass();
+			$resObj->version = $lastVersion->version;
+			$resObj->filename = $filename;
+
+			return success($resObj);
+		}
+		else
+			return error("last version not found");
+	}
+
+	/**
+	 * Gets dms version with highest number
+	 * Returns success with dms data and fileHandle with file content or error
+	 */
+	public function getLastVersion($dms_id)
+	{
+		// get the latest version number
+		$this->_ci->DmsVersionModel->addSelect('version');
+		$this->_ci->DmsVersionModel->addOrder('version', 'DESC');
+		$this->_ci->DmsVersionModel->addOrder('insertamum', 'DESC');
+		$this->_ci->DmsVersionModel->addLimit(1);
+		$lastDmsVersionResult = $this->_ci->DmsVersionModel->loadWhere(
+			array('dms_id' => $dms_id)
+		);
+
+		if (isError($lastDmsVersionResult)) return $lastDmsVersionResult;
+
+		if (hasData($lastDmsVersionResult))
+		{
+			$lastDmsVersionData = getData($lastDmsVersionResult)[0];
+			$lastDmsVersion = $lastDmsVersionData->version;
+
+			// call get Version with last version number
+			return $this->getVersion($dms_id, $lastDmsVersion);
+		}
+		else
+			return error("Dms last version not found");
+	}
+
+	/**
+	 * Gets specified dms version
+	 * Returns success with dms data and fileHandle with file content or error
+	 */
+	public function getVersion($dms_id, $version)
+	{
+		$this->_ci->DmsVersionModel->addSelect('dms_id, version, filename, mimetype, name, beschreibung, cis_suche, schlagworte');
+		$dmsVersionResult = $this->_ci->DmsVersionModel->loadWhere(
+			array(
+				'dms_id' => $dms_id,
+				'version' => $version
+			)
+		);
+
+		if (isError($dmsVersionResult)) return $dmsVersionResult;
+
+		if (hasData($dmsVersionResult))
+		{
+			$dmsVersion = getData($dmsVersionResult)[0];
+
+			// get file content as file pointer
+			$fileHandleResult = $this->_ci->DmsFSModel->openRead($dmsVersion->filename);
+
+			if (isError($fileHandleResult)) return $fileHandleResult;
+
+			if (hasData($fileHandleResult))
+			{
+				$fileHandle = getData($fileHandleResult);
+				$dmsVersion->{self::FILE_CONTENT_PROPERTY} = $fileHandle;
+
+				// close file pointer
+				$closeResult = $this->_ci->DmsFSModel->close($fileHandle);
+
+				if (isError($closeResult)) return $closeResult;
+
+				return success($dmsVersion);
+			}
+			else
+				return error("File could not be opened");
+		}
+		else
+			return error("Dms version not found");
+	}
+
+	/**
+	 * Removes dms entry and all its versions, deletes all associated files
+	 * Returns success with removed version numbers or error
+	 */
+	public function removeAll($dms_id)
+	{
+		$versionsRemoved = array();
+
+		$this->_ci->DmsVersionModel->addSelect('version, filename');
+		$allVersionsResult = $this->_ci->DmsVersionModel->loadWhere(array('dms_id' => $dms_id));
+
+		if (hasData($allVersionsResult))
+		{
+			$allVersionsData = getData($allVersionsResult);
+
+			$error = null;
+
+			// Start DB transaction to avoid deleting only part of the data
+			$this->_ci->db->trans_begin();
+
+			// remove all versions of the dms Id
+			foreach ($allVersionsData as $version)
+			{
+				$removeVersionResult = $this->removeVersion($dms_id, $version->version);
+
+				if (isError($removeVersionResult))
+				{
+					$error = $removeVersionResult;
+					break;
+				}
+				else
+					$versionsRemoved[] = $version; // return removed versions
+			}
+
+			// Transaction complete!
+			$this->_ci->db->trans_complete();
+
+			// Check if everything went ok during the transaction
+			if ($this->_ci->db->trans_status() === false || isset($error))
+			{
+				$this->_ci->db->trans_rollback();
+
+				if (isset($error))
+					return $error;
+				else
+					return error("Error occured when deleting, rolled back");
+			}
+			else
+			{
+				$this->_ci->db->trans_commit();
+			}
+		}
+
+		return success($versionsRemoved);
+	}
+
+	/**
+	 * Removes latest version and its associated file
+	 * Returns success with removed dms version data (dms_id, version, filename) or error
+	 */
+	public function removeLastVersion($dms_id)
+	{
+		$lastVersionNumber = 0;
+		// get the latest version
+		$lastVersionResult = $this->getLastVersion($dms_id);
+
+		if (isError($lastVersionResult)) return $lastVersionResult;
+
+		if (hasData($lastVersionResult))
+		{
+			$lastVersion = getData($lastVersionResult);
+			$lastVersionNumber = $lastVersion->version;
+		}
+
+		// call remove method for latest version
+		return $this->removeVersion($dms_id, $lastVersionNumber);
+	}
+
+	/**
+	 * Removes latest version and its associated file
+	 * Returns success with removed dms version data (dms_id, version, filename) or error
+	 */
+	public function removeVersion($dms_id, $version)
+	{
+		$removeVersionResultObj = new stdClass();
+		$removeVersionResultObj->dms_id = null;
+		$removeVersionResultObj->version = null;
+		$removeVersionResultObj->filename = null;
+
+		// load dms version and check how many versions there are
+		$db = new DB_Model();
+
+		$checkDeleteResult = $db->execReadOnlyQuery(
+			"SELECT filename,
+					(SELECT count(version)
+						FROM campus.tbl_dms_version dv_anzahl
+						WHERE dv_anzahl.dms_id = dv.dms_id) AS anzahl_versionen
+					FROM campus.tbl_dms_version dv
+					WHERE dms_id=?
+					AND version=?",
+			array($dms_id, $version)
+		);
+
+		if (isError($checkDeleteResult)) return $checkDeleteResult;
+
+		if (hasData($checkDeleteResult))
+		{
+			$checkDeleteData = getData($checkDeleteResult)[0];
+
+			// delete version
+			$deleteVersionResult = $this->_ci->DmsVersionModel->delete(array($dms_id, $version));
+
+			if (isError($deleteVersionResult)) return $deleteVersionResult;
+
+			$removeVersionResultObj->version = $version;
+			$removeVersionResultObj->filename = $checkDeleteData->filename;
+
+			// delete dms too if no versions left
+			if ($checkDeleteData->anzahl_versionen <= 1)
+			{
+				$deleteDmsResult = $this->_ci->DmsModel->delete($dms_id);
+
+				if (isError($deleteDmsResult)) return $deleteDmsResult;
+
+				$removeVersionResultObj->dms_id = $dms_id;
+			}
+
+			// delete file from file system
+			$removeResult = $this->_ci->DmsFSModel->remove($checkDeleteData->filename);
+
+			if (isError($removeResult)) return $removeResult;
+		}
+
+		return success($removeVersionResultObj);
+	}
+
+	// -----------------------------------------------------------------------------------------------------------
+	// Private methods
+
+	/**
+	 * Copies file from sourceFileHandle to destinationFilename in DMS folder
+	 * Returns success or error on fail
+	 */
+	private function _copyFile($sourceFileHandle, $destinationFilename)
+	{
+		// get file location from file handle
+		$metaData = stream_get_meta_data($sourceFileHandle);
+
+		if (isset($metaData['uri']) && !isEmptyString($metaData['uri']))
+		{
+			// if file location determined, copy file
+			$source = $metaData['uri'];
+
+			if (copy($source, DMS_PATH.$destinationFilename))
+			{
+				return success();
+			}
+			else
+			{
+				// error if copy returned false
+				return error('error occured while copying file');
+			}
+		}
+		else
+		{
+			// error when source location could not be determined
+			return error('error occured while getting source file name');
+		}
+
+		return success($resObj);
+	}
+
+	/**
+	 * Generates unique filename, appends file extension from document name
+	 * Returns the filename string
+	 */
+	private function _getUniqueFilename($dokname)
+	{
+		// create unique id
+		$uniqueFilename = uniqid();
+
+		// getting extension of file from document name
+		$fileExtension = pathinfo($dokname, PATHINFO_EXTENSION);
+
+		// if file extension found, append it
+		if (!isEmptyString($fileExtension))
+			$uniqueFilename .= '.'.$fileExtension;
+
+		return $uniqueFilename;
+	}
+
+	// -----------------------------------------------------------------------------------------------------------
+	// Deprecated methods, not to be used
+
 	/**
 	 * Load a DMS Document.
 	 * If no version is particularly given, the latest version is loaded.
@@ -33,19 +490,20 @@ class DmsLib extends FHC_Controller
 	{
 		if (is_numeric($dms_id))
 		{
-			$this->ci->DmsModel->addJoin('campus.tbl_dms_version', 'dms_id');
-			$this->ci->DmsModel->addOrder('version', 'DESC');
-			$this->ci->DmsModel->addLimit(1);
-			
+			$this->_ci->DmsModel->addJoin('campus.tbl_dms_version', 'dms_id');
+			$this->_ci->DmsModel->addOrder('version', 'DESC');
+			$this->_ci->DmsModel->addLimit(1);
+
 			if (!is_numeric($version))
 			{
-				return $this->ci->DmsModel->load($dms_id);
+				return $this->_ci->DmsModel->load($dms_id);
 			}
 			else
 			{
-				return $this->ci->DmsModel->loadWhere(array('dms_id' => $dms_id, 'version' => $version));
+				return $this->_ci->DmsModel->loadWhere(array('dms_id' => $dms_id, 'version' => $version));
 			}
 		}
+
 		return error('The parameter DMS ID must be a number');
 	}

@@ -57,34 +515,30 @@ class DmsLib extends FHC_Controller
 	 */
 	public function read($dms_id, $version = null)
 	{
-		$result = null;
+		$result = error('Wrong dms_id parameter');

 		if (isset($dms_id))
 		{
-			$this->ci->DmsModel->addJoin('campus.tbl_dms_version', 'dms_id');
-			$this->ci->DmsModel->addOrder('version', 'DESC');
-			$this->ci->DmsModel->addLimit(1);
+			$this->_ci->DmsModel->addJoin('campus.tbl_dms_version', 'dms_id');
+			$this->_ci->DmsModel->addOrder('version', 'DESC');
+			$this->_ci->DmsModel->addLimit(1);

 			if (!isset($version))
 			{
-				$result = $this->ci->DmsModel->load($dms_id);
+				$result = $this->_ci->DmsModel->load($dms_id);
 			}
 			else
 			{
-				$result = $this->ci->DmsModel->loadWhere(array('dms_id' => $dms_id, 'version' => $version));
+				$result = $this->_ci->DmsModel->loadWhere(array('dms_id' => $dms_id, 'version' => $version));
 			}
-		}

-		if (hasData($result))
-		{
-			$resultFS = $this->ci->DmsFSModel->read($result->retval[0]->filename);
-			if (isSuccess($resultFS))
+			// If a dms has been found
+			if (hasData($result))
 			{
-				$result->retval[0]->{DmsLib::FILE_CONTENT_PROPERTY} = $resultFS->retval;
-			}
-			else
-			{
-				$result = $resultFS;
+				$resultFS = $this->_ci->DmsFSModel->readBase64(getData($result)[0]->filename);
+				if (isError($resultFS)) return $resultFS; // if an error occurred return it
+
+				$result->retval[0]->{self::FILE_CONTENT_PROPERTY} = getData($resultFS);
 			}
 		}

@@ -101,28 +555,22 @@ class DmsLib extends FHC_Controller
 	 */
 	public function getAktenAcceptedDms($person_id, $dokument_kurzbz = null, $no_file = null)
 	{
-		$result = $this->ci->AkteModel->getAktenAcceptedDms($person_id, $dokument_kurzbz);
+		$result = $this->_ci->AkteModel->getAktenAcceptedDms($person_id, $dokument_kurzbz);

 		if (hasData($result) && $no_file == null)
 		{
-			$cnt = count($result->retval);
-			for ($i = 0; $i < $cnt; $i++)
+			for ($i = 0; $i < count(getData($result)); $i++)
 			{
-				$resultFS = $this->ci->DmsFSModel->read($result->retval[$i]->filename);
-				if (isSuccess($resultFS))
-				{
-					$result->retval[$i]->{DmsLib::FILE_CONTENT_PROPERTY} = $resultFS->retval;
-				}
-				else
-				{
-					$result = $resultFS;
-				}
+				$resultFS = $this->_ci->DmsFSModel->readBase64(getData($result)[$i]->filename);
+				if (isError($resultFS)) return $resultFS; // if an error occurred return it
+
+				$result->retval[$i]->{self::FILE_CONTENT_PROPERTY} = getData($resultFS);
 			}
 		}

 		return $result;
 	}
-	
+
 	/**
 	 * Uploads a document and saves it to DMS
 	 * @param $dms DMS assoc array
@@ -135,32 +583,33 @@ class DmsLib extends FHC_Controller
 		// Init upload configs
 		$this->_loadUploadLibrary($allowed_types);

-		if (!$this->ci->upload->do_upload($field_name))
+		if (!$this->_ci->upload->do_upload($field_name))
 		{
-			return error($this->ci->upload->display_errors());
+			return error($this->_ci->upload->display_errors());
 		}

-		$upload_data = $this->ci->upload->data();  // data about the uploaded file
-		$filename = $upload_data['file_name'];
+		$upload_data = $this->_ci->upload->data();  // data about the uploaded file

 		// Insert to DMS table
-		if (!$result = $this->ci->DmsModel->insert($this->ci->DmsModel->filterFields($dms)))
-		{
-			return error('Failed inserting to DMS');
-		}
-		$upload_data['dms_id'] = $result->retval;
+		$insDmsResult = $this->_ci->DmsModel->insert($this->_ci->DmsModel->filterFields($dms));
+		if (isError($insDmsResult)) return $insDmsResult;
+
+		$upload_data['dms_id'] = getData($insDmsResult);

 		// Insert DMS version
-		if (!$result = $this->ci->DmsVersionModel->insert(
-			$this->ci->DmsVersionModel->filterFields($dms, $result->retval, $filename)))
-		{
-			return error('Failed inserting DMS version');
-		}
+		$insVersionResult = $this->_ci->DmsVersionModel->insert(
+			$this->_ci->DmsVersionModel->filterFields(
+				$dms,
+				$upload_data['dms_id'],
+				$upload_data['file_name']
+			)
+		);
+		if (isError($insVersionResult)) return $insVersionResult;

-		// return result of uploaded data
-		return success($upload_data); // data about the uploaded file
+		// Return result of uploaded data
+		return success($upload_data);
 	}
-	
+
 	/**
 	 * Download a document.
 	 *
@@ -171,38 +620,31 @@ class DmsLib extends FHC_Controller
 	 */
 	public function download($dms_id, $filename = null, $disposition = 'inline')
 	{
-		$result = $this->getFileInfo($dms_id);
-		
-		if (isError($result))
+		// Retrieves info about the given dms
+		$fileInfoResult = $this->getFileInfo($dms_id);
+		if (isError($fileInfoResult)) return error(getError($fileInfoResult));
+
+		// If data have been found
+		if (hasData($fileInfoResult))
 		{
-			return error(getError($result));
+			$fileObj = getData($fileInfoResult);
+
+			// Change filename, if filename is provided
+			if (!isEmptyString($filename)) $fileObj->name = $filename;
+
+			// Add file disposition if disposition has a valid value
+			if ($disposition == 'attachment' || $disposition == 'inline')
+			{
+				$fileObj->disposition = $disposition;
+			}
+
+			return success($fileObj);
 		}

-		$fileObj = getData($result);
-		
-		// Change filename, if filename is provided
-		if (is_string($filename))
-		{
-			$fileObj->name = $filename;
-		}
-		
-		// Add file disposition
-		if ($disposition == 'attachment')
-		{
-			$fileObj->disposition = 'attachment';
-		}
-		else
-		{
-			$fileObj->disposition = 'inline';
-		}
-	
-		// Output file
-		if(!$this->outputFile($fileObj))
-		{
-			return error('Error on file output');
-		}
+		// If no data have been found then return an empty success
+		return success();
 	}
-	
+
 	/**
 	 * Get file information.
 	 *
@@ -212,28 +654,28 @@ class DmsLib extends FHC_Controller
 	 */
 	public function getFileInfo($dms_id, $version = null)
 	{
-		if (!is_numeric($dms_id))
-		{
-			return error('Wrong parameter');
-		}
-		
-		// Load file
+		// Checks the dms_id parameter
+		if (!is_numeric($dms_id)) return error('Wrong parameter');
+
+		// Load DMS from database
 		$result = $this->load($dms_id, $version);
+		if (isError($result)) return error(getError($result));

-		if (isError($result))
+		// If data have been found
+		if (hasData($result))
 		{
-			return error(getError($result));
+			// Store file information in fileObj
+			$fileObj = new stdClass();
+			$fileObj->filename = getData($result)[0]->filename;
+			$fileObj->file = DMS_PATH.getData($result)[0]->filename;
+			$fileObj->name = DMS_PATH.getData($result)[0]->name;   // original user filename
+			$fileObj->mimetype = getData($result)[0]->mimetype;
+
+			return success($fileObj);
 		}

-		// Store file information in fileObj
-		$fileObj = new StdClass();
-		$fileObj->filename = getData($result)[0]->filename;
-		$fileObj->file = DMS_PATH. getData($result)[0]->filename;
-		$fileObj->name = DMS_PATH. getData($result)[0]->name;   // original users filename
-		$fileObj->mimetype = DMS_PATH. getData($result)[0]->mimetype;
-		
-		return success($fileObj);
-
+		// If no data have been found return an empty success
+		return success();
 	}

 	/**
@@ -253,20 +695,20 @@ class DmsLib extends FHC_Controller
 			$result = $this->_saveFileOnInsert($dms);
 			if (isSuccess($result))
 			{
-				$filename = $result->retval;
+				$filename = getData($result);
 				if (isset($dms['dms_id']) && $dms['dms_id'] != '')
 				{
-					$result = $this->ci->DmsVersionModel->insert(
-						$this->ci->DmsVersionModel->filterFields($dms, $dms['dms_id'], $filename)
+					$result = $this->_ci->DmsVersionModel->insert(
+						$this->_ci->DmsVersionModel->filterFields($dms, $dms['dms_id'], $filename)
 					);
 				}
 				else
 				{
-					$result = $this->ci->DmsModel->insert($this->ci->DmsModel->filterFields($dms));
+					$result = $this->_ci->DmsModel->insert($this->_ci->DmsModel->filterFields($dms));
 					if (isSuccess($result))
 					{
-						$result = $this->ci->DmsVersionModel->insert(
-							$this->ci->DmsVersionModel->filterFields($dms, $result->retval, $filename)
+						$result = $this->_ci->DmsVersionModel->insert(
+							$this->_ci->DmsVersionModel->filterFields($dms, getData($result), $filename)
 						);
 					}
 				}
@@ -277,15 +719,15 @@ class DmsLib extends FHC_Controller
 			$result = $this->_saveFileOnUpdate($dms);
 			if (isSuccess($result))
 			{
-				$result = $this->ci->DmsModel->update($dms['dms_id'], $this->ci->DmsModel->filterFields($dms));
+				$result = $this->_ci->DmsModel->update($dms['dms_id'], $this->_ci->DmsModel->filterFields($dms));
 				if (isSuccess($result))
 				{
-					$result = $this->ci->DmsVersionModel->update(
+					$result = $this->_ci->DmsVersionModel->update(
 						array(
 							$dms['dms_id'],
 							$dms['version']
 						),
-						$this->ci->DmsVersionModel->filterFields($dms)
+						$this->_ci->DmsVersionModel->filterFields($dms)
 					);
 				}
 			}
@@ -308,56 +750,54 @@ class DmsLib extends FHC_Controller
 		if (is_numeric($person_id) && is_numeric($dms_id))
 		{
 			// Start DB transaction
-			$this->ci->db->trans_start(false);
+			$this->_ci->db->trans_start(false);

 			// Get akte_id from table tbl_akte
-			$result = $this->ci->AkteModel->loadWhere(array('person_id' => $person_id, 'dms_id' => $dms_id));
+			$result = $this->_ci->AkteModel->loadWhere(array('person_id' => $person_id, 'dms_id' => $dms_id));
 			if (isSuccess($result))
 			{
 				// Delete all entries in tbl_akte
-				$cnt = count($result->retval);
-				for ($i = 0; $i < $cnt; $i++)
+				for ($i = 0; $i < count(getData($result)); $i++)
 				{
-					$this->ci->AkteModel->delete($result->retval[$i]->akte_id);
+					$this->_ci->AkteModel->delete(getData($result)[$i]->akte_id);
 				}

 				// Get all filenames related to this dms
-				$resultFileNames = $this->ci->DmsVersionModel->loadWhere(array('dms_id' => $dms_id));
+				$resultFileNames = $this->_ci->DmsVersionModel->loadWhere(array('dms_id' => $dms_id));
 				if (isSuccess($resultFileNames))
 				{
 					// Delete from tbl_dms_version
-					$result = $this->ci->DmsVersionModel->delete(array('dms_id' => $dms_id));
+					$result = $this->_ci->DmsVersionModel->delete(array('dms_id' => $dms_id));
 					if (isSuccess($result))
 					{
 						// Delete from tbl_dms
-						$result = $this->ci->DmsModel->delete($dms_id);
+						$result = $this->_ci->DmsModel->delete($dms_id);
 					}
 				}
 			}

 			// Transaction complete!
-			$this->ci->db->trans_complete();
+			$this->_ci->db->trans_complete();

 			// Check if everything went ok during the transaction
-			if ($this->ci->db->trans_status() === false || isError($result))
+			if ($this->_ci->db->trans_status() === false || isError($result))
 			{
-				$this->ci->db->trans_rollback();
+				$this->_ci->db->trans_rollback();
 				$result = error('An error occurred while performing a delete operation', EXIT_ERROR);
 			}
 			else
 			{
-				$this->ci->db->trans_commit();
+				$this->_ci->db->trans_commit();
 				$result = success('Dms successfully removed from DB');
 			}

 			// If everything is ok
 			if (isSuccess($result))
 			{
-				$cnt = count($resultFileNames->retval);
 				// Remove all files related to this person and dms
-				for ($i = 0; $i < $cnt; $i++)
+				for ($i = 0; $i < count(getData($resultFileNames)); $i++)
 				{
-					$this->ci->DmsFSModel->remove($resultFileNames->retval[$i]->filename);
+					$this->_ci->DmsFSModel->removeBase64(getData($resultFileNames)[$i]->filename);
 				}
 			}
 		}
@@ -376,19 +816,19 @@ class DmsLib extends FHC_Controller
 	 */
 	public function getAkteContent($akte_id)
 	{
-		$akte = $this->ci->AkteModel->load($akte_id);
+		$akte = $this->_ci->AkteModel->load($akte_id);
 		if (hasData($akte))
 		{
-			if ($akte->retval[0]->inhalt != '')
+			if (getData($akte)[0]->inhalt != '')
 			{
-				return success(base64_decode($akte->retval[0]->inhalt));
+				return success(base64_decode(getData($akte)[0]->inhalt));
 			}
-			elseif ($akte->retval[0]->dms_id != '')
+			elseif (getData($akte)[0]->dms_id != '')
 			{
-				$dmscontent = $this->read($akte->retval[0]->dms_id);
+				$dmscontent = $this->read(getData($akte)[0]->dms_id);
 				if (isSuccess($dmscontent))
 				{
-					return success(base64_decode($dmscontent->retval[0]->file_content));
+					return success(base64_decode(getData($dmscontent)[0]->file_content));
 				}
 				else
 				{
@@ -415,10 +855,10 @@ class DmsLib extends FHC_Controller
 	{
 		$filename = uniqid().'.'.pathinfo($dms['name'], PATHINFO_EXTENSION);

-		$result = $this->ci->DmsFSModel->write($filename, $dms['file_content']);
+		$result = $this->_ci->DmsFSModel->writeBase64($filename, $dms['file_content']);
 		if (isSuccess($result))
 		{
-			$result->retval = $filename;
+			$result = success($filename);
 		}

 		return $result;
@@ -439,7 +879,7 @@ class DmsLib extends FHC_Controller

 			if (hasData($result))
 			{
-				$result = $this->ci->DmsFSModel->write($result->retval[0]->filename, $dms['file_content']);
+				$result = $this->_ci->DmsFSModel->writeBase64(getData($result)[0]->filename, $dms['file_content']);
 			}
 		}

@@ -451,12 +891,13 @@ class DmsLib extends FHC_Controller
 	 */
 	private function _loadUploadLibrary($allowed_types)
 	{
-		$config['upload_path']          = $this->UPLOAD_PATH;
-		$config['allowed_types']        = implode('|', $allowed_types);
-		$config['overwrite']            = true;
-		$config['file_name']				= uniqid().'.pdf';
+		$config = array();
+		$config['upload_path'] = DMS_PATH;
+		$config['allowed_types'] = implode('|', $allowed_types);
+		$config['overwrite'] = true;
+		$config['file_name'] = uniqid().'.pdf';

-		$this->ci->load->library('upload', $config);
-		$this->ci->upload->initialize($config);
+		$this->_ci->load->library('upload', $config);
+		$this->_ci->upload->initialize($config);
 	}
 }
@@ -0,0 +1,304 @@
+<?php
+/* Copyright (C) 2022 fhcomplete.net
+ *
+ * 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 2 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
+ *
+ */
+
+require_once(dirname(__FILE__).'/../../vendor/nategood/httpful/bootstrap.php');
+
+use \ZipArchive as ZipArchive;
+
+/**
+ * Simple client to convert documents using Docsbox
+ */
+class DocsboxLib
+{
+	const ERROR = 1;
+	const SUCCESS = 0;
+	const STATUS_FINISHED = 'finished'; // Docsbox status when a document conversion ended
+	const STATUS_QUEUED = 'queued'; // Docsbox status when a file has been queued for the conversion
+	const STATUS_STARTED = 'started'; // Docsbox status when a file has started being worked
+	const STATUS_WORKING = 'working'; // Docsbox status when a file is being converted
+	const OUTPUT_FILENAME = 'out.zip.pdf'; // File name used by docsbox to save a converted document
+
+	const DEFAULT_FORMAT = 'pdf'; // Default supported format
+
+	// -------------------------------------------------------------------------------------------------
+	// Public static methods
+
+	/**
+	 * Static method used to convert a document using a Docsbox installation (local/remote) over the network
+	 * It return 0 on success and any other integer on error
+	 * NOTE: currently format is not supported
+	 */
+	public static function convert($inputFileName, $outputFileName, $format)
+	{
+		// If a format has not been given
+		if (($format == null) || ($format != null && ctype_space($format) === true)) $format = self::DEFAULT_FORMAT;
+
+		// Posts the file to docsbox
+		$queueId = self::_postFile($inputFileName);
+		// If an error occurred
+		if ($queueId == null) return self::ERROR;
+
+		// Checks and waits if the file has been converted
+		$resultUrl = self::_checkConvertion($queueId);
+		// If an error occurred
+		if ($resultUrl == null) return self::ERROR;
+
+		// Download and rename the converted file
+		$downloaded = self::_downloadFile($resultUrl, $outputFileName);
+		// If an error occurred
+		if (!$downloaded) return self::ERROR;
+
+		return self::SUCCESS;
+	}
+
+	// -------------------------------------------------------------------------------------------------
+	// Private static methods
+
+	/**
+	 * Posts the given file to a Docsboxserver and checks the response to return a valid queue id
+	 * On failure it returns a null value
+	 */
+	private static function _postFile($inputFileName)
+	{
+		$queueId = null;
+
+		try
+		{
+			// Posts the given file and expects a response in JSON format
+			$postFileResponse = \Httpful\Request::post(DOCSBOX_SERVER.DOCSBOX_PATH_API)
+				->attach(array('file' => $inputFileName))
+				->expectsJson()
+				->send();
+
+			// Checks that:
+			// - the response is not empty
+			// - the reponse body has the property id
+			// - the property id is a valid string
+			// - the reponse body has the property status
+			// - docsbox queued the conversion of the posted file
+			if (is_object($postFileResponse)
+				&& isset($postFileResponse->body)
+				&& isset($postFileResponse->body->id)
+				&& $postFileResponse->body->id != '' && $postFileResponse->body->id != null
+				&& isset($postFileResponse->body->status)
+				&& $postFileResponse->body->status == self::STATUS_QUEUED)
+			{
+				$queueId = $postFileResponse->body->id;
+			}
+			else
+			{
+				// If docsbox refused to convert the posted file
+				if (isset($postFileResponse->body->status)
+					&& $postFileResponse->body->status != self::STATUS_QUEUED)
+				{
+					error_log(
+						'Docsbox did not queue the posted file. Returned status: '.
+						$postFileResponse->body->status
+					);
+				}
+				else // any other generic error
+				{
+					error_log(
+						'An error occurred while posting to docsbox. Response: '.
+						print_r($postFileResponse, 1)
+					);
+				}
+			}
+		}
+		catch(\Httpful\Exception\ConnectionErrorException $cee) // Httpful exception
+		{
+			error_log($cee->getMessage());
+		}
+		catch (Exception $e) // any other exception
+		{
+			error_log($e->getMessage());
+		}
+
+		return $queueId;
+	}
+
+	/**
+	 * Check the status of the file convertion identified by the given queue element id
+	 * A URL is returned with the path where it is possible to download the converted file
+	 * If an error occurred then a null value is returned
+	 */
+	private static function _checkConvertion($queueId)
+	{
+		$resultUrl = null;
+		$startConvertionsTime = time(); // time when the file conversion has started
+
+		// Until a timeout has occurred
+		while (time() - $startConvertionsTime <= DOCSBOX_CONVERSION_TIMEOUT)
+		{
+			sleep(DOCSBOX_WAITING_SLEEP_TIME); // takes a nap on every round
+
+			try
+			{
+				// Calls the docsbox server to check the status of the
+				// file conversion using the provided queue id
+				// it expects a response in JSON format
+				$getStatusResponse = \Httpful\Request::get(DOCSBOX_SERVER.DOCSBOX_PATH_API.$queueId)
+					->expectsJson()
+					->send();
+
+				// Checks that:
+				// - the response is not empty
+				// - the reponse body has the property id
+				// - the property id is a valid string
+				// - the reponse body has the property status
+				// - docsbox is working the conversion of the posted file
+				if (is_object($getStatusResponse)
+					&& isset($getStatusResponse->body->id)
+					&& $getStatusResponse->body->id != '' && $getStatusResponse->body->id != null
+					&& isset($getStatusResponse->body->status))
+				{
+					// Checks that docsbox has finished working on the file conversion
+					// and that there is a valid resultUrl property
+					if ($getStatusResponse->body->status == self::STATUS_FINISHED
+						&& isset($getStatusResponse->body->result_url)
+						&& $getStatusResponse->body->result_url != ''
+						&& $getStatusResponse->body->result_url != null)
+					{
+						$resultUrl = $getStatusResponse->body->result_url;
+						break;
+					}
+					// Just started or still working on it
+					elseif ($getStatusResponse->body->status == self::STATUS_WORKING
+						|| $getStatusResponse->body->status == self::STATUS_STARTED)
+					{
+						// go on!
+					}
+					else // any other status is abnormal
+					{
+						error_log(
+							'Not valid status for queue element: '.$queueId.'. Response: '.
+							print_r($getStatusResponse, 1)
+						);
+						break; // interrupt the loop on error
+					}
+				}
+				else // if the response from the docsbox server is not valid
+				{
+					error_log(
+						'An error occurred while checking the docsbox activity. Response: '.
+						print_r($getStatusResponse, 1)
+					);
+					break; // interrupt the loop on error
+				}
+			}
+			catch(\Httpful\Exception\ConnectionErrorException $cee) // Httpful exception
+			{
+				error_log($cee->getMessage());
+				break; // interrupt the loop on error
+			}
+			catch (Exception $e) // any other exception
+			{
+				error_log($e->getMessage());
+				break; // interrupt the loop on error
+			}
+		}
+
+		return $resultUrl;
+	}
+
+	/**
+	 * Download the converted file using the provided URL, unzip it, and renames it into the provided file name
+	 */
+	private static function _downloadFile($resultUrl, $outputFileName)
+	{
+		$downloaded = false; // pessimistic assumption
+
+		try
+		{
+			// Download the file
+			$getFileResponse = \Httpful\Request::get(DOCSBOX_SERVER.$resultUrl)->send();
+
+			// If the downloaded file content is valid and not empty
+			if (isset($getFileResponse->body)
+				&& $getFileResponse->body != null
+				&& $getFileResponse->body != '')
+			{
+				// Output directory where to unzip the downloaded zip file
+				$outputDirectory = dirname($outputFileName);
+				// The path and name of the downloaded zip file
+				$temporaryDownloadedZip = sys_get_temp_dir().'/'.basename($resultUrl);
+
+				// Write the file content into a temporary directory and file
+				if (file_put_contents($temporaryDownloadedZip, $getFileResponse->body) != false)
+				{
+					$zipArchive = new ZipArchive;
+
+					// Open and extract the dowloaded zip file into the directory of the output file
+					if ($zipArchive->open($temporaryDownloadedZip) === true
+						&& $zipArchive->extractTo($outputDirectory) === true
+						&& $zipArchive->close() === true)
+					{
+						// Opened, extracted and closed!
+
+						// Rename the extracted file to the given output file name
+						if (rename($outputDirectory.'/'.self::OUTPUT_FILENAME, $outputFileName))
+						{
+							$downloaded = true;
+						}
+						else
+						{
+							error_log(
+								'An error occurred while renaming the extracted file: '.
+								$outputDirectory.'/'.self::OUTPUT_FILENAME.' into: '.
+								$outputFileName
+							);
+						}
+					}
+					else
+					{
+						error_log(
+							'An error occurred while working the dowloaded zip file: '.
+							$temporaryDownloadedZip
+						);
+					}
+				}
+				else // if an error occurred while writing
+				{
+					error_log(
+						'An error occurred while writing the file content to: '.
+						$temporaryDownloadedZip
+					);
+				}
+			}
+			else // if the downloaded file is not valid
+			{
+				error_log(
+					'An error occurred while downloading the file from the docsbox server: '.
+					print_r($getFileResponse, 1)
+				);
+			}
+		}
+		catch(\Httpful\Exception\ConnectionErrorException $cee)
+		{
+			error_log($cee->getMessage());
+		}
+		catch (Exception $e)
+		{
+			error_log($e->getMessage());
+		}
+
+		return $downloaded;
+	}
+}
+
@@ -14,20 +14,28 @@ class DocumentLib
 		// Gets CI instance
 		$this->ci =& get_instance();

-		exec('unoconv --version', $ret_arr);
-
-		if(isset($ret_arr[0]))
+		// Which document converter has to be used
+		if (defined('DOCSBOX_ENABLED') && DOCSBOX_ENABLED === true)
 		{
-			$hlp = explode(' ', $ret_arr[0]);
-			if(isset($hlp[1]))
-			{
-				$this->unoconv_version = $hlp[1];
-			}
-			else
-				show_error('Could not get Unoconv Version');
+			// Use docsbox!!
 		}
 		else
-			show_error('Unoconv not found - Please install Unoconv');
+		{
+			exec('unoconv --version', $ret_arr);
+
+			if(isset($ret_arr[0]))
+			{
+				$hlp = explode(' ', $ret_arr[0]);
+				if(isset($hlp[1]))
+				{
+					$this->unoconv_version = $hlp[1];
+				}
+				else
+					show_error('Could not get Unoconv Version');
+			}
+			else
+				show_error('Unoconv not found - Please install Unoconv');
+		}
 	}

 	/**
@@ -57,9 +65,16 @@ class DocumentLib
 			case 'application/vnd.ms-word':
 			case 'application/vnd.oasis.opendocument.text':
 			case 'text/plain':
-				// Unoconv Version 0.6 seems to fail on converting TXT Files
-				if ($this->unoconv_version == '0.6')
-					return error();
+				if (defined('DOCSBOX_ENABLED') && DOCSBOX_ENABLED === true)
+				{
+					// Use docsbox
+				}
+				else
+				{
+					// Unoconv Version 0.6 seems to fail on converting TXT Files
+					if ($this->unoconv_version == '0.6')
+						return error();
+				}

 				$ret = $this->convert($filename, $outFile, 'pdf');
 				if(isSuccess($ret))
@@ -105,6 +120,7 @@ class DocumentLib

 		finfo_close($finfo);

+		$out = null;
 		exec($cmd, $out, $ret);
 		if ($ret != 0)
 		{
@@ -123,13 +139,26 @@ class DocumentLib
 	 */
 	public function convert($inFile, $outFile, $format)
 	{
-		if ($this->unoconv_version == '0.6')
-			$command = 'unoconv -f %1$s  %3$s > %2$s';
-		else
-			$command = 'unoconv -f %s --output %s %s 2>&1';
-		$command = sprintf($command, $format, $outFile, $inFile);
+		$ret = 0;

-		exec($command, $out, $ret);
+		// If it is set to use docsbox
+		if (defined('DOCSBOX_ENABLED') && DOCSBOX_ENABLED === true)
+		{
+			require_once(dirname(__FILE__).'/../application/libraries/DocsboxLib.php');
+
+			$ret = DocsboxLib::convert($inFile, $outFile, $format);
+		}
+		else // otherwise use unoconv
+		{
+			if ($this->unoconv_version == '0.6')
+				$command = 'unoconv -f %1$s  %3$s > %2$s';
+			else
+				$command = 'unoconv -f %s --output %s %s 2>&1';
+			$command = sprintf($command, $format, $outFile, $inFile);
+
+			$out = null;
+			exec($command, $out, $ret);
+		}

 		if ($ret != 0)
 		{
@@ -191,6 +220,7 @@ class DocumentLib
 		$cmd .= '/countspaces {  [ exch { dup 32 ne { pop } if  } forall ] length } bind def  >> ';
 		$cmd .= 'setpagedevice viewJPEG"';

+		$out = null;
 		exec($cmd, $out, $ret);
 		if ($ret != 0)
 		{
@@ -1,7 +1,25 @@
 <?php
+/**
+ * Copyright (C) 2022 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');

+use \stdClass as stdClass;
+
 /**
 * Library to manage core extensions
 */
@@ -23,7 +41,7 @@ class ExtensionsLib

 	// Directories that are part of the extension archive
 	private $SOFTLINK_TARGET_DIRECTORIES = array(
-		APPPATH => array('config', 'controllers', 'helpers', 'hooks', 'libraries', 'models', 'views', 'widgets'),
+		APPPATH => array('config', 'components', 'controllers', 'helpers', 'hooks', 'libraries', 'models', 'views', 'widgets'),
 		DOC_ROOT => array('public')
 	);

@@ -181,17 +199,15 @@ class ExtensionsLib
 			// Select all the version of this extension
 			$this->_ci->ExtensionsModel->addSelect('extension_id');
 			$result = $this->_ci->ExtensionsModel->loadWhere(array('name' => $extensionName));
-			if (hasData($result)) // if something was found
+			// If something was found
+			if (hasData($result))
 			{
-				$extsArray = array();
-				foreach ($result->retval as $key => $extension) // loops on them
+				// Loops on them
+				foreach ($result->retval as $extension)
 				{
 					// Remove them all
 					$result = $this->_ci->ExtensionsModel->delete($extension->extension_id);
-					if (isSuccess($result))
-					{
-						$delExtension = true;
-					}
+					if (isSuccess($result)) $delExtension = true;
 				}
 			}
 		}
@@ -432,9 +448,13 @@ class ExtensionsLib
 				// If no errors occurred
 				if ($extensionJson != null)
 				{
+					// Default value
+					$fhcomplete_version = 0;
+
 					require_once('version.php'); // get the core version
+
 					// Checks if the required core version of the extension is the same of this system
-					if (isset($extensionJson->core_version) && $extensionJson->core_version == $fhcomplete_version)
+					if (isset($extensionJson->core_version) && version_compare($extensionJson->core_version, $fhcomplete_version,'<='))
 					{
 						$this->_printMessage('Required core version: '.$extensionJson->core_version);
 						$this->_printMessage('Current core version: '.$fhcomplete_version);
@@ -587,18 +607,22 @@ class ExtensionsLib
 		for ($sqlDir = $startVersion; $sqlDir <= $extensionJson->version; $sqlDir++)
 		{
 			// If a directory with the same value of the version is present in the sql scripts directory
-			if (($files = glob($pkgSQLsPath.'/'.$sqlDir.'/*'.ExtensionsLib::SQL_FILE_EXTENSION)) != false)
-	        {
+			$files = glob($pkgSQLsPath.'/'.$sqlDir.'/*'.ExtensionsLib::SQL_FILE_EXTENSION);
+			if ($files != false)
+			{
 				// Loads every sql files
-	            foreach ($files as $file)
-	            {
-	                $sql = file_get_contents($file); // gets the entire content of the file
+				foreach ($files as $file)
+				{
+					$sql = file_get_contents($file); // gets the entire content of the file

 					$this->_printMessage('Executing query:');
 					$this->_printMessage($sql);

 					// Try to execute that
-					if (!isSuccess($result = @$this->_ci->ExtensionsModel->executeQuery($sql)))
+					$resultQuery = @$this->_ci->ExtensionsModel->executeQuery($sql);
+
+					// If _not_ a success
+					if (!isSuccess($resultQuery))
 					{
 						$this->_errorOccurred = true;
 						$this->_printFailure(' error occurred while executing the query');
@@ -608,11 +632,11 @@ class ExtensionsLib
 					else
 					{
 						$this->_printMessage('Query result:');
-						var_dump($result->retval); // KEEP IT!!!
+						var_dump(getData($resultQuery)); // KEEP IT!!!
 						$this->_ci->eprintflib->printEOL();
 					}
-	            }
-	        }
+				}
+			}
 		}

 		$this->_printSuccess(!$this->_errorOccurred);
@@ -673,7 +697,7 @@ class ExtensionsLib

 		foreach ($this->SOFTLINK_TARGET_DIRECTORIES as $rootPath => $targetDirectories)
 		{
-			foreach ($targetDirectories as $key => $targetDirectory)
+			foreach ($targetDirectories as $targetDirectory)
 			{
 				if (file_exists($rootPath.$targetDirectory.'/'.ExtensionsLib::EXTENSIONS_DIR_NAME.'/'.$extensionName))
 				{
@@ -727,7 +751,7 @@ class ExtensionsLib
 		// For every target directory
 		foreach ($this->SOFTLINK_TARGET_DIRECTORIES as $rootPath => $targetDirectories)
 		{
-			foreach ($targetDirectories as $key => $targetDirectory)
+			foreach ($targetDirectories as $targetDirectory)
 			{
 				// If destination of the symlink does not exist
 				if (!file_exists($rootPath.$targetDirectory.'/'.ExtensionsLib::EXTENSIONS_DIR_NAME.'/'.$extensionName))
@@ -1,142 +0,0 @@
-<?php
-/***
- * FH-Complete
- *
- * @package		FHC-API
- * @author		FHC-Team
- * @copyright	Copyright (c) 2016, fhcomplete.org
- * @license		GPLv3
- * @link		http://fhcomplete.org
- * @since		Version 1.0
- * @filesource
- */
-
-if (!defined('BASEPATH')) exit('No direct script access allowed');
-
-class FilesystemLib
-{
-	/**
-	 * checkParameters
-	 */
-	private function checkParameters($filepath, $filename)
-	{
-		if (isset($filepath) && isset($filename) &&
-			$filepath != '' && $filename != '')
-		{
-			return true;
-		}
-		else
-		{
-			return false;
-		}
-	}
-	
-	/**
-	 * read
-	 */
-	public function read($filepath, $filename)
-	{
-		$result = null;
-		
-		if ($this->checkParameters($filepath, $filename))
-		{
-			$resource = $filepath.DIRECTORY_SEPARATOR.$filename;
-			if (file_exists($resource) && $fileHandle = fopen($resource, 'r'))
-			{
-				$result = '';
-				while (!feof($fileHandle))
-				{
-					$result .= fread($fileHandle, 8192);
-				}
-				fclose($fileHandle);
-			}
-		}
-		
-		return $result;
-	}
-	
-	/**
-	 * write
-	 */
-	public function write($filepath, $filename, $content)
-	{
-		$result = null;
-
-		if ($this->checkParameters($filepath, $filename) && isset($content))
-		{
-			$resource = $filepath.DIRECTORY_SEPARATOR.$filename;
-			if (is_writable($filepath) && $fileHandle = fopen($resource, 'w'))
-			{
-				if (fwrite($fileHandle, $content) !== false)
-				{
-					$result = true;
-				}
-				fclose($fileHandle);
-			}
-		}
-		
-		return $result;
-	}
-	
-	/**
-	 * append
-	 */
-	public function append($filepath, $filename, $content)
-	{
-		$result = null;
-
-		if ($this->checkParameters($filepath, $filename) && isset($content))
-		{
-			$resource = $filepath.DIRECTORY_SEPARATOR.$filename;
-			if (is_writable($resource) && $fileHandle = fopen($resource, 'a'))
-			{
-				if (fwrite($fileHandle, $content) !== false)
-				{
-					$result = true;
-				}
-				fclose($fileHandle);
-			}
-		}
-		
-		return $result;
-	}
-	
-	/**
-	 * remove
-	 */
-	public function remove($filepath, $filename)
-	{
-		$result = null;
-
-		if ($this->checkParameters($filepath, $filename))
-		{
-			if (is_writable($filepath))
-			{
-				$resource = $filepath.DIRECTORY_SEPARATOR.$filename;
-				$result = unlink($resource);
-			}
-		}
-		
-		return $result;
-	}
-	
-	/**
-	 * rename
-	 */
-	public function rename($filepath, $filename, $newFilepath, $newFilename)
-	{
-		$result = null;
-
-		if ($this->checkParameters($filepath, $filename) && $this->checkParameters($newFilepath, $newFilename))
-		{
-			$resource = $filepath.DIRECTORY_SEPARATOR.$filename;
-			if (is_writable($filepath) && is_writable($newFilepath) && file_exists($resource))
-			{
-				$destination = $newFilepath.DIRECTORY_SEPARATOR.$newFilename;
-				$result = rename($resource, $destination);
-			}
-		}
-		
-		return $result;
-	}
-}
@@ -340,20 +340,25 @@ class FilterWidgetLib
 			{
 				$filterDefinition = $filters[$filtersCounter]; // definition of one filter

-				if ($filtersCounter > 0)
-					$where .= ' AND '; // if it's NOT the last one
-
-				if (!isEmptyString($filterDefinition->name)) // if the name of the applied filter is valid
+				// If the name of the applied filter is valid
+				if (!isEmptyString($filterDefinition->name))
 				{
-					// ...build the condition
-					$where .= '"'.$filterDefinition->name.'"'.$this->_getDatasetQueryCondition($filterDefinition);
+					// Build the query conditions
+					$datasetQueryCondition = $this->_getDatasetQueryCondition($filterDefinition);
+
+					// If the built condition is valid then add it to the query clause
+					if (!isEmptyString($datasetQueryCondition))
+					{
+						// // If this is NOT the first one
+						if ($filtersCounter > 0) $where .= ' AND ';
+
+						$where .= '"'.$filterDefinition->name.'"'.$datasetQueryCondition;
+					}
 				}
 			}

-			if ($where != '') // if the SQL where clause was built
-			{
-				$datasetQuery .= ' WHERE '.$where;
-			}
+			// If the SQL where clause was built
+			if ($where != '') $datasetQuery .= ' WHERE '.$where;
 		}

 		return $datasetQuery;
@@ -169,6 +169,9 @@ class IssuesLib
 		return $this->_changeIssueStatus($issue_id, $data, $user);
 	}

+	// --------------------------------------------------------------------------------------------------------------
+	// Private methods
+
 	/**
 	 * Changes status of an issue.
 	 * @param int $issue_id
@@ -215,8 +218,15 @@ class IssuesLib
 	 * @param string $inhalt_extern
 	 * @return object success or error
 	 */
-	private function _addIssue($fehlercode, $person_id = null, $oe_kurzbz = null, $fehlertext_params = null, $resolution_params = null, $fehlercode_extern = null, $inhalt_extern = null)
-	{
+	private function _addIssue(
+		$fehlercode,
+		$person_id = null,
+		$oe_kurzbz = null,
+		$fehlertext_params = null,
+		$resolution_params = null,
+		$fehlercode_extern = null,
+		$inhalt_extern = null
+	) {
 		if (isEmptyString($person_id) && isEmptyString($oe_kurzbz))
 			return error("Person_id or oe_kurzbz must be set.");

@@ -226,7 +236,15 @@ class IssuesLib
 		if (hasData($fehlerRes))
 		{
 			$fehlertextVorlage = getData($fehlerRes)[0]->fehlertext;
-			$fehlertext = isEmptyArray($fehlertext_params) ? $fehlertextVorlage : vsprintf($fehlertextVorlage, $fehlertext_params);
+
+			$fehlertext = $fehlertextVorlage;
+			if (!isEmptyArray($fehlertext_params))
+			{
+				if (count($fehlertext_params) != substr_count($fehlertextVorlage, '%s'))
+					return error('Wrong number of parameters for Fehlertext, fehler_kurzbz ' . $fehlercode);
+
+				$fehlertext = vsprintf($fehlertextVorlage, $fehlertext_params);
+			}

 			$openIssuesCountRes = $this->_ci->IssueModel->getOpenIssueCount($fehlercode, $person_id, $oe_kurzbz, $fehlercode_extern);

@@ -252,6 +270,7 @@ class IssuesLib
 							return error("Invalid parameters for resolution");
 					}

+					// insert new issue
 					return $this->_ci->IssueModel->insert(
 						array(
 							'fehlercode' => $fehlercode,
@@ -267,8 +286,8 @@ class IssuesLib
 						)
 					);
 				}
-				else
-					return success($openIssueCount);
+				else // return success if issue already exists
+					return success("Issue already exists");
 			}
 			else
 				return error("Number of open issues could not be determined");
@@ -1,4 +1,20 @@
 <?php
+/**
+ * Copyright (C) 2022 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');

@@ -37,7 +53,7 @@ class NavigationLib
 		// Loads library ExtensionsLib
 		$this->_ci->load->library('ExtensionsLib');

-		$this->_navigationPage = $this->_getNavigationtPage($params); // sets the id for the related navigation widget
+		$this->_navigationPage = $this->_getNavigationPage($params); // sets the id for the related navigation widget
 	}

 	//------------------------------------------------------------------------------------------------------------------
@@ -67,9 +83,19 @@ class NavigationLib
 	 * Returns the structure for one level of the menu
 	 */
 	public function oneLevel(
-		$description, $link = '#', $children = null, $icon = '', $expand = false,
-		$subscriptDescription = null, $subscriptLinkClass = null, $subscriptLinkValue = null, $target = '',
-		$sort = null, $requiredPermissions = null, $subscriptLinkHref = '#')
+		$description,
+		$link = '#',
+		$children = null,
+		$icon = '',
+		$expand = false,
+		$subscriptDescription = null,
+		$subscriptLinkClass = null,
+		$subscriptLinkValue = null,
+		$target = '',
+		$sort = null,
+		$requiredPermissions = null,
+		$subscriptLinkHref = '#'
+	)
 	{
 		return array(
 			'description' => $description,
@@ -223,7 +249,8 @@ class NavigationLib
 					$filename = APPPATH.'config/'.ExtensionsLib::EXTENSIONS_DIR_NAME.'/'.$ext->name.'/'.self::CONFIG_NAVIGATION_FILENAME;
 					if (file_exists($filename))
 					{
-						unset($config);
+						$config = array(); // default value
+
 						include($filename);

 						if (isset($config[$configName]) && is_array($config[$configName]))
@@ -278,7 +305,7 @@ class NavigationLib
 		}
 		else
 		{
-			foreach ($navigationArray as $key=>$row)
+			foreach ($navigationArray as $key => $row)
 			{
 				// Search for * Entries
 				if (mb_strpos($key, '*') === 0 || mb_strpos($key, '*') === mb_strlen($key) - 1)
@@ -300,7 +327,7 @@ class NavigationLib
 	 * Return an unique string that identify this navigation widget
 	 * NOTE: The default value is the URI where the NavigationWidget is called
 	 */
-	private function _getNavigationtPage($params)
+	private function _getNavigationPage($params)
 	{
 		if ($params != null
 			&& is_array($params)
@@ -0,0 +1,298 @@
+<?php
+/**
+ * Copyright (C) 2022 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');
+
+use \stdClass as stdClass;
+
+/**
+ *
+ */
+class SearchBarLib
+{
+	// Error constats
+	const ERROR_WRONG_JSON = 'ERR001';
+	const ERROR_WRONG_SEARCHSTR = 'ERR002';
+	const ERROR_NO_TYPES = 'ERR003';
+	const ERROR_WRONG_TYPES = 'ERR004';
+
+	// List of allowed types of search
+	const ALLOWED_TYPES = ['mitarbeiter', 'organisationunit', 'raum', 'person', 'student', 'prestudent', 'document', 'cms'];
+
+	const PHOTO_IMG_URL = '/cis/public/bild.php?src=person&person_id=';
+
+	private $_ci; // Code igniter instance
+
+	/**
+	 * Gets the CI instance and loads model
+	 */
+	public function __construct()
+	{
+		$this->_ci =& get_instance(); // get code igniter instance
+
+		// It is loaded only to have the DB_Model available
+		$this->_ci->load->model('person/Benutzer_model', 'BenutzerModel');
+	}
+
+	//------------------------------------------------------------------------------------------------------------------
+	// Public methods
+
+	/**
+	 * It performes the search of the given search string using the specified search types
+	 */
+	public function search($searchstr, $types)
+	{
+		// Checks if the given parameters are fine
+		$search = $this->_checkParameters($searchstr, $types);
+
+		// If the check was successful then perform the search
+		if (isSuccess($search)) $search = $this->_search($searchstr, $types);
+
+		return $search; // return the result
+	}
+
+	//------------------------------------------------------------------------------------------------------------------
+	// Private methods
+
+	/**
+	 * Checks:
+	 * - The given searchstr is a not empty string
+	 * - The given types is a not empty array and contains allowed search types
+	 */
+	private function _checkParameters($searchstr, $types)
+	{
+		// If searchstr is empty
+		if (isEmptyString($searchstr)) return error(self::ERROR_WRONG_SEARCHSTR);
+
+		// If types is not an array or it is empty
+		if (isEmptyArray($types)) return error(self::ERROR_NO_TYPES);
+
+		// If all the elements in types are allowed search types
+		if (!isEmptyArray(array_diff($types, self::ALLOWED_TYPES))) return error(self::ERROR_WRONG_TYPES);
+
+		return success(); // The check is fine!
+	}
+
+	/**
+	 * Loops on types and perform the search of that type using searchstr
+	 * Then it collects all the returned data into an array as property of an object
+	 */
+	private function _search($searchstr, $types)
+	{
+		// Object to be returned
+		$result = new stdClass();
+		$result->data = array();
+
+		// For each search type
+		foreach ($types as $type)
+		{
+			// Perform the search and then add the result to data
+			$result->data = array_merge($result->data, $this->{'_'.$type}($searchstr, $type));
+		}
+
+		return $result;
+	}
+
+	/**
+	 * Search for employees
+	 */
+	private function _mitarbeiter($searchstr, $type)
+	{
+		$dbModel = new DB_Model();
+
+		$employees = $dbModel->execReadOnlyQuery('
+			SELECT
+				\''.$type.'\' AS type,
+				b.uid AS uid,
+				p.person_id AS person_id,
+				p.vorname || \' \' || p.nachname AS name,
+				ARRAY_AGG(DISTINCT(org.bezeichnung)) AS organisationunit_name,
+				COALESCE(b.alias, b.uid) || \''.'@'.DOMAIN.'\' AS email,
+				TRIM(COALESCE(k.kontakt, \'\') || \' \' || COALESCE(m.telefonklappe, \'\')) AS phone,
+				\''.base_url(self::PHOTO_IMG_URL).'\' || p.person_id AS photo_url, 
+				ARRAY_AGG(DISTINCT(stdkst.bezeichnung)) AS standardkostenstelle 
+			  FROM public.tbl_mitarbeiter m
+			  JOIN public.tbl_benutzer b ON(b.uid = m.mitarbeiter_uid)
+			  JOIN (
+				SELECT o.bezeichnung, bf.uid
+				  FROM public.tbl_benutzerfunktion bf
+				  JOIN public.tbl_organisationseinheit o USING(oe_kurzbz)
+				 WHERE bf.funktion_kurzbz = \'kstzuordnung\'
+				   AND (bf.datum_von IS NULL OR bf.datum_von <= NOW())
+				   AND (bf.datum_bis IS NULL OR bf.datum_bis >= NOW())
+				GROUP BY o.bezeichnung, bf.uid
+			) stdkst ON stdkst.uid = b.uid 
+			  JOIN public.tbl_person p USING(person_id)
+			  JOIN (
+				SELECT o.bezeichnung, bf.uid
+				  FROM public.tbl_benutzerfunktion bf
+				  JOIN public.tbl_organisationseinheit o USING(oe_kurzbz)
+				 WHERE bf.funktion_kurzbz = \'oezuordnung\'
+				   AND (bf.datum_von IS NULL OR bf.datum_von <= NOW())
+				   AND (bf.datum_bis IS NULL OR bf.datum_bis >= NOW())
+				GROUP BY o.bezeichnung, bf.uid
+			) org ON org.uid = b.uid 
+		     LEFT JOIN (
+				SELECT kontakt, standort_id
+				  FROM public.tbl_kontakt
+				 WHERE kontakttyp = \'telefon\'
+			) k ON(k.standort_id = m.standort_id)
+			 WHERE b.uid ILIKE \'%'.$dbModel->escapeLike($searchstr).'%\'
+			    OR p.vorname ILIKE \'%'.$dbModel->escapeLike($searchstr).'%\'
+			    OR p.nachname ILIKE \'%'.$dbModel->escapeLike($searchstr).'%\'
+			    OR org.bezeichnung ILIKE \'%'.$dbModel->escapeLike($searchstr).'%\'
+			    OR stdkst.bezeichnung ILIKE \'%'.$dbModel->escapeLike($searchstr).'%\'
+		      GROUP BY type, b.uid, p.person_id, name, email, m.telefonklappe, phone
+		');
+
+		// If something has been found then return it
+		if (hasData($employees)) return getData($employees);
+
+		// Otherwise return an empty array
+		return array();
+	}
+
+	/**
+	 * Seach for organisation units
+	 */
+	private function _organisationunit($searchstr, $type)
+	{
+		$dbModel = new DB_Model();
+
+		$ous = $dbModel->execReadOnlyQuery('
+			SELECT
+				\''.$type.'\' AS type,
+				o.oe_kurzbz AS oe_kurzbz,
+				o.bezeichnung AS name,
+				oParent.oe_kurzbz AS parentoe_kurzbz,
+				oParent.bezeichnung AS parentoe_name,
+				ARRAY_AGG(DISTINCT(bfLeader.uid)) AS leader_uid,
+				ARRAY_AGG(DISTINCT(bfLeader.vorname || \' \' || bfLeader.nachname)) AS leader_name,
+				COUNT(bfCount.benutzerfunktion_id) AS number_of_people,
+				(CASE WHEN o.mailverteiler = TRUE THEN o.oe_kurzbz || \''.'@'.DOMAIN.'\' END) AS mailgroup
+			  FROM public.tbl_organisationseinheit o
+		     LEFT JOIN public.tbl_organisationseinheit oParent ON(oParent.oe_kurzbz = o.oe_parent_kurzbz)
+		     LEFT JOIN (
+				SELECT benutzerfunktion_id, oe_kurzbz
+				  FROM public.tbl_benutzerfunktion
+				 WHERE funktion_kurzbz = \'oezuordnung\'
+				   AND (datum_von IS NULL OR datum_von <= NOW())
+				   AND (datum_bis IS NULL OR datum_bis >= NOW())
+			) bfCount ON(bfCount.oe_kurzbz = o.oe_kurzbz)
+		     LEFT JOIN (
+				SELECT bf.oe_kurzbz, bf.uid, p.vorname, p.nachname
+				  FROM public.tbl_benutzerfunktion bf
+				  JOIN public.tbl_benutzer b USING(uid)
+				  JOIN public.tbl_person p USING(person_id)
+				 WHERE funktion_kurzbz = \'Leitung\'
+				   AND (datum_von IS NULL OR datum_von <= NOW())
+				   AND (datum_bis IS NULL OR datum_bis >= NOW())
+				   AND b.aktiv = TRUE
+			) bfLeader ON(bfLeader.oe_kurzbz = o.oe_kurzbz)
+			 WHERE o.oe_kurzbz ILIKE \'%'.$dbModel->escapeLike($searchstr).'%\'
+			    OR o.bezeichnung ILIKE \'%'.$dbModel->escapeLike($searchstr).'%\'
+		      GROUP BY type, o.oe_kurzbz, o.bezeichnung, oParent.oe_kurzbz, oParent.bezeichnung
+		');
+
+		// If something has been found
+		if (hasData($ous))
+		{
+			// Loop through the returned dataset
+			foreach (getData($ous) as $ou)
+			{
+				// Create the new property leaders as an empty array
+				$ou->leaders = array();
+
+				// Loop through the found leaders for this organisation unit
+				for ($i = 0; $i < count($ou->leader_uid); $i++)
+				{
+					// If a leader exists for this organisationunit and has a name :D
+					if (!isEmptyString($ou->leader_uid[$i]) && !isEmptyString($ou->leader_name[$i]))
+					{
+						// Empty object that will contains the leader uid and name
+						$leader = new stdClass();
+						// Set the properties name and uid
+						$leader->uid = $ou->leader_uid[$i];
+						$leader->name = $ou->leader_name[$i];
+						// Add the leader object to the leaders array
+						$ou->leaders[] = $leader;
+					}
+				}
+
+				// Remove the not needed properties leader_uid and leader_name
+				unset($ou->leader_uid);
+				unset($ou->leader_name);
+			}
+
+			// Returns the changed dataset
+			return getData($ous);
+		}
+
+		// Otherwise return an empty array
+		return array();
+	}
+
+	/**
+	 * Search for persons
+	 */
+	private function _person($searchstr, $type)
+	{
+		return array();
+	}
+
+	/**
+	 * Search for students
+	 */
+	private function _student($searchstr, $type)
+	{
+		return array();
+	}
+
+	/**
+	 * Search for prestudents
+	 */
+	private function _prestudent($searchstr, $type)
+	{
+		return array();
+	}
+
+	/**
+	 * Search for documents
+	 */
+	private function _document($searchstr, $type)
+	{
+		return array();
+	}
+
+	/**
+	 * Search for CMSs
+	 */
+	private function _cms($searchstr, $type)
+	{
+		return array();
+	}
+
+	/**
+	 * Search for rooms
+	 */
+	private function _raum($searchstr, $type)
+	{
+		return array();
+	}
+}
+
@@ -0,0 +1,103 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+class PlausicheckProducerLib
+{
+	const CI_LIBRARY_PATH = 'application/libraries';
+	const PLAUSI_ISSUES_FOLDER = 'issues/plausichecks';
+	const EXECUTE_PLAUSI_CHECK_METHOD_NAME = 'executePlausiCheck';
+
+	private $_ci; // ci instance
+	private $_currentStudiensemester; // current Studiensemester
+
+	// set fehler which can be produced by the job
+	// structure: fehler_kurzbz => class (library) name for resolving
+	private $_fehlerLibMappings = array(
+		'AbbrecherAktiv' => 'AbbrecherAktiv',
+		'AbschlussstatusFehlt' => 'AbschlussstatusFehlt',
+		'AktSemesterNull' => 'AktSemesterNull',
+		'AktiverStudentOhneStatus' => 'AktiverStudentOhneStatus',
+		'AktiverStudentstatusOhneKontobuchung' => 'AktiverStudentstatusOhneKontobuchung',
+		'AusbildungssemPrestudentUngleichAusbildungssemStatus' => 'AusbildungssemPrestudentUngleichAusbildungssemStatus',
+		'BewerberNichtZumRtAngetreten' => 'BewerberNichtZumRtAngetreten',
+		'DatumAbschlusspruefungFehlt' => 'DatumAbschlusspruefungFehlt',
+		'DatumSponsionFehlt' => 'DatumSponsionFehlt',
+		'DatumStudiensemesterFalscheReihenfolge' => 'DatumStudiensemesterFalscheReihenfolge',
+		'FalscheAnzahlAbschlusspruefungen' => 'FalscheAnzahlAbschlusspruefungen',
+		'FalscheAnzahlHeimatadressen' => 'FalscheAnzahlHeimatadressen',
+		'FalscheAnzahlZustelladressen' => 'FalscheAnzahlZustelladressen',
+		'GbDatumWeitZurueck' => 'GbDatumWeitZurueck',
+		'InaktiverStudentAktiverStatus' => 'InaktiverStudentAktiverStatus',
+		'IncomingHeimatNationOesterreich' => 'IncomingHeimatNationOesterreich',
+		'IncomingOhneIoDatensatz' => 'IncomingOhneIoDatensatz',
+		'IncomingOrGsFoerderrelevant' => 'IncomingOrGsFoerderrelevant',
+		'InskriptionVorLetzerBismeldung' => 'InskriptionVorLetzerBismeldung',
+		'NationNichtOesterreichAberGemeinde' => 'NationNichtOesterreichAberGemeinde',
+		'OrgformStgUngleichOrgformPrestudent' => 'OrgformStgUngleichOrgformPrestudent',
+		'PrestudentMischformOhneOrgform' => 'PrestudentMischformOhneOrgform',
+		'StgPrestudentUngleichStgStudienplan' => 'StgPrestudentUngleichStgStudienplan',
+		'StgPrestudentUngleichStgStudent' => 'StgPrestudentUngleichStgStudent',
+		'StudentstatusNachAbbrecher' => 'StudentstatusNachAbbrecher'
+		//'StudienplanUngueltig' => 'StudienplanUngueltig'
+	);
+
+	public function __construct()
+	{
+		$this->_ci =& get_instance(); // get ci instance
+
+		// load models
+		$this->_ci->load->model('organisation/studiensemester_model', 'StudiensemesterModel');
+
+		// get current Studiensemester
+		$studiensemesterRes = $this->_ci->StudiensemesterModel->getAkt();
+		if (hasData($studiensemesterRes)) $this->_currentStudiensemester = getData($studiensemesterRes)[0]->studiensemester_kurzbz;
+	}
+
+	/**
+	 * Executes check for a fehler_kurzbz, returns the result.
+	 * @param $fehler_kurzbz string
+	 * @param $studiensemester_kurzbz string optionally needed for issue production
+	 * @param $studiengang_kz int optionally needed for issue production
+	 */
+	public function producePlausicheckIssue($fehler_kurzbz, $studiensemester_kurzbz = null, $studiengang_kz = null)
+	{
+		$libName = $this->_fehlerLibMappings[$fehler_kurzbz];
+
+		// get Studiensemester
+		if (isEmptyString($studiensemester_kurzbz)) $studiensemester_kurzbz = $this->_currentStudiensemester;
+
+		// get path of library for issue to be produced
+		$issuesLibPath = DOC_ROOT . self::CI_LIBRARY_PATH . '/' . self::PLAUSI_ISSUES_FOLDER . '/';
+		$issuesLibFilePath = $issuesLibPath . $libName . '.php';
+
+		// check if library file exists
+		if (!file_exists($issuesLibFilePath)) return error("Issue library file " . $issuesLibFilePath . " does not exist");
+
+		// load library connected to fehlercode
+		$this->_ci->load->library(self::PLAUSI_ISSUES_FOLDER . '/'.$libName);
+
+		$lowercaseLibName = mb_strtolower($libName);
+
+		// check if method is defined in library class
+		if (!is_callable(array($this->_ci->{$lowercaseLibName}, self::EXECUTE_PLAUSI_CHECK_METHOD_NAME)))
+			return error("Method " . self::EXECUTE_PLAUSI_CHECK_METHOD_NAME . " is not defined in library $lowercaseLibName");
+
+		// pass the data needed for issue check
+		$paramsForCheck = array(
+			'studiensemester_kurzbz' => $studiensemester_kurzbz,
+			'studiengang_kz' => $studiengang_kz
+		);
+
+		// call the function for checking for issue production
+		return $this->_ci->{$lowercaseLibName}->{self::EXECUTE_PLAUSI_CHECK_METHOD_NAME}($paramsForCheck);
+	}
+
+	/**
+	 * Gets all fehler_kurzbz for fehler which need to be checked.
+	 */
+	public function getFehlerKurzbz()
+	{
+		return array_keys($this->_fehlerLibMappings);
+	}
+}
@@ -0,0 +1,43 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+require_once('PlausiChecker.php');
+
+/**
+ *
+ */
+class AbbrecherAktiv extends PlausiChecker
+{
+	public function executePlausiCheck($params)
+	{
+		$results = array();
+
+		// pass parameters needed for plausicheck
+		$studiengang_kz = isset($params['studiengang_kz']) ? $params['studiengang_kz'] : null;
+
+		// get all students failing the plausicheck
+		$prestudentRes = $this->_ci->plausichecklib->getAbbrecherAktiv($studiengang_kz);
+
+		if (isError($prestudentRes)) return $prestudentRes;
+
+		if (hasData($prestudentRes))
+		{
+			$prestudents = getData($prestudentRes);
+
+			// populate results with data necessary for writing issues
+			foreach ($prestudents as $prestudent)
+			{
+				$results[] = array(
+					'person_id' => $prestudent->person_id,
+					'oe_kurzbz' => $prestudent->prestudent_stg_oe_kurzbz,
+					'fehlertext_params' => array('prestudent_id' => $prestudent->prestudent_id),
+					'resolution_params' => array('prestudent_id' => $prestudent->prestudent_id)
+				);
+			}
+		}
+
+		// return the results
+		return success($results);
+	}
+}
@@ -0,0 +1,44 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+require_once('PlausiChecker.php');
+
+/**
+ *
+ */
+class AbschlussstatusFehlt extends PlausiChecker
+{
+	public function executePlausiCheck($params)
+	{
+		$results = array();
+
+		// pass parameters needed for plausicheck
+		$studiensemester_kurzbz = isset($params['studiensemester_kurzbz']) ? $params['studiensemester_kurzbz'] : null;
+		$studiengang_kz = isset($params['studiengang_kz']) ? $params['studiengang_kz'] : null;
+
+		// get all students failing the plausicheck
+		$prestudentRes = $this->_ci->plausichecklib->getAbschlussstatusFehlt($studiensemester_kurzbz, $studiengang_kz);
+
+		if (isError($prestudentRes)) return $prestudentRes;
+
+		if (hasData($prestudentRes))
+		{
+			$prestudents = getData($prestudentRes);
+
+			// populate results with data necessary for writing issues
+			foreach ($prestudents as $prestudent)
+			{
+				$results[] = array(
+					'person_id' => $prestudent->person_id,
+					'oe_kurzbz' => $prestudent->prestudent_stg_oe_kurzbz,
+					'fehlertext_params' => array('prestudent_id' => $prestudent->prestudent_id),
+					'resolution_params' => array('prestudent_id' => $prestudent->prestudent_id)
+				);
+			}
+		}
+
+		// return the results
+		return success($results);
+	}
+}
@@ -0,0 +1,50 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+require_once('PlausiChecker.php');
+
+/**
+ *
+ */
+class AktSemesterNull extends PlausiChecker
+{
+	public function executePlausiCheck($params)
+	{
+		$results = array();
+
+		// pass parameters needed for plausicheck
+		$studiensemester_kurzbz = isset($params['studiensemester_kurzbz']) ? $params['studiensemester_kurzbz'] : null;
+		$studiengang_kz = isset($params['studiengang_kz']) ? $params['studiengang_kz'] : null;
+
+		// get all students failing the plausicheck
+		$prestudentRes = $this->_ci->plausichecklib->getAktSemesterNull($studiensemester_kurzbz, $studiengang_kz);
+
+		if (isError($prestudentRes)) return $prestudentRes;
+
+		if (hasData($prestudentRes))
+		{
+			$prestudents = getData($prestudentRes);
+
+			// populate results with data necessary for writing issues
+			foreach ($prestudents as $prestudent)
+			{
+				$results[] = array(
+					'person_id' => $prestudent->person_id,
+					'oe_kurzbz' => $prestudent->prestudent_stg_oe_kurzbz,
+					'fehlertext_params' => array(
+						'prestudent_id' => $prestudent->prestudent_id,
+						'studiensemester_kurzbz' => $prestudent->studiensemester_kurzbz
+					),
+					'resolution_params' => array(
+						'prestudent_id' => $prestudent->prestudent_id,
+						'studiensemester_kurzbz' => $prestudent->studiensemester_kurzbz
+					)
+				);
+			}
+		}
+
+		// return the results
+		return success($results);
+	}
+}
@@ -0,0 +1,43 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+require_once('PlausiChecker.php');
+
+/**
+ *
+ */
+class AktiverStudentOhneStatus extends PlausiChecker
+{
+	public function executePlausiCheck($params)
+	{
+		$results = array();
+
+		// pass parameters needed for plausicheck
+		$studiengang_kz = isset($params['studiengang_kz']) ? $params['studiengang_kz'] : null;
+
+		// get all students failing the plausicheck
+		$prestudentRes = $this->_ci->plausichecklib->getAktiverStudentOhneStatus($studiengang_kz);
+
+		if (isError($prestudentRes)) return $prestudentRes;
+
+		if (hasData($prestudentRes))
+		{
+			$prestudents = getData($prestudentRes);
+
+			// populate results with data necessary for writing issues
+			foreach ($prestudents as $prestudent)
+			{
+				$results[] = array(
+					'person_id' => $prestudent->person_id,
+					'oe_kurzbz' => $prestudent->prestudent_stg_oe_kurzbz,
+					'fehlertext_params' => array('prestudent_id' => $prestudent->prestudent_id),
+					'resolution_params' => array('prestudent_id' => $prestudent->prestudent_id)
+				);
+			}
+		}
+
+		// return the results
+		return success($results);
+	}
+}
@@ -0,0 +1,50 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+require_once('PlausiChecker.php');
+
+/**
+ * Student with active status should have been charged, i.e. have a Kontobuchung with negative or zero value.
+ */
+class AktiverStudentstatusOhneKontobuchung extends PlausiChecker
+{
+	public function executePlausiCheck($params)
+	{
+		$results = array();
+
+		// pass parameters needed for plausicheck
+		$studiensemester_kurzbz = isset($params['studiensemester_kurzbz']) ? $params['studiensemester_kurzbz'] : null;
+		$studiengang_kz = isset($params['studiengang_kz']) ? $params['studiengang_kz'] : null;
+
+		// get all students failing the plausicheck
+		$prestudentRes = $this->_ci->plausichecklib->getAktiverStudentstatusOhneKontobuchung($studiensemester_kurzbz, $studiengang_kz);
+
+		if (isError($prestudentRes)) return $prestudentRes;
+
+		if (hasData($prestudentRes))
+		{
+			$prestudents = getData($prestudentRes);
+
+			// populate results with data necessary for writing issues
+			foreach ($prestudents as $prestudent)
+			{
+				$results[] = array(
+					'person_id' => $prestudent->person_id,
+					'oe_kurzbz' => $prestudent->prestudent_stg_oe_kurzbz,
+					'fehlertext_params' => array(
+						'prestudent_id' => $prestudent->prestudent_id,
+						'studiensemester_kurzbz' => $prestudent->studiensemester_kurzbz
+					),
+					'resolution_params' => array(
+						'prestudent_id' => $prestudent->prestudent_id,
+						'studiensemester_kurzbz' => $prestudent->studiensemester_kurzbz
+					)
+				);
+			}
+		}
+
+		// return the results
+		return success($results);
+	}
+}
@@ -0,0 +1,56 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+require_once('PlausiChecker.php');
+
+/**
+ *
+ */
+class AusbildungssemPrestudentUngleichAusbildungssemStatus extends PlausiChecker
+{
+	public function executePlausiCheck($params)
+	{
+		$results = array();
+
+		// pass parameters needed for plausicheck
+		$studiensemester_kurzbz = isset($params['studiensemester_kurzbz']) ? $params['studiensemester_kurzbz'] : null;
+		$studiengang_kz = isset($params['studiengang_kz']) ? $params['studiengang_kz'] : null;
+
+		// get all students failing the plausicheck
+		$prestudentRes = $this->_ci->plausichecklib->getAusbildungssemPrestudentUngleichAusbildungssemStatus(
+			$studiensemester_kurzbz,
+			$studiengang_kz
+		);
+
+		if (isError($prestudentRes)) return $prestudentRes;
+
+		if (hasData($prestudentRes))
+		{
+			$prestudents = getData($prestudentRes);
+
+			// populate results with data necessary for writing issues
+			foreach ($prestudents as $prestudent)
+			{
+				$results[] = array(
+					'person_id' => $prestudent->person_id,
+					'oe_kurzbz' => $prestudent->prestudent_stg_oe_kurzbz,
+					'fehlertext_params' => array(
+						'status_ausbildungssemester' => $prestudent->status_ausbildungssemester,
+						'student_ausbildungssemester' => $prestudent->student_ausbildungssemester,
+						'student_uid' => $prestudent->student_uid,
+						'prestudent_id' => $prestudent->prestudent_id,
+						'studiensemester_kurzbz' => $prestudent->studiensemester_kurzbz
+					),
+					'resolution_params' => array(
+						'prestudent_id' => $prestudent->prestudent_id,
+						'studiensemester_kurzbz' => $prestudent->studiensemester_kurzbz
+					)
+				);
+			}
+		}
+
+		// return the results
+		return success($results);
+	}
+}
@@ -0,0 +1,47 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+require_once('PlausiChecker.php');
+
+/**
+ *
+ */
+class BewerberNichtZumRtAngetreten extends PlausiChecker
+{
+	public function executePlausiCheck($params)
+	{
+		$results = array();
+
+		// pass parameters needed for plausicheck
+		$studiensemester_kurzbz = isset($params['studiensemester_kurzbz']) ? $params['studiensemester_kurzbz'] : null;
+		$studiengang_kz = isset($params['studiengang_kz']) ? $params['studiengang_kz'] : null;
+
+		// get all students failing the plausicheck
+		$prestudentRes = $this->_ci->plausichecklib->getBewerberNichtZumRtAngetreten($studiensemester_kurzbz, $studiengang_kz);
+
+		if (isError($prestudentRes)) return $prestudentRes;
+
+		if (hasData($prestudentRes))
+		{
+			$prestudents = getData($prestudentRes);
+
+			// populate results with data necessary for writing issues
+			foreach ($prestudents as $prestudent)
+			{
+				$results[] = array(
+					'person_id' => $prestudent->person_id,
+					'oe_kurzbz' => $prestudent->prestudent_stg_oe_kurzbz,
+					'fehlertext_params' => array('prestudent_id' => $prestudent->prestudent_id),
+					'resolution_params' => array(
+						'studiensemester_kurzbz' => $prestudent->studiensemester_kurzbz,
+						'prestudent_id' => $prestudent->prestudent_id
+					)
+				);
+			}
+		}
+
+		// return the results
+		return success($results);
+	}
+}
@@ -0,0 +1,47 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+require_once('PlausiChecker.php');
+
+/**
+ *
+ */
+class DatumAbschlusspruefungFehlt extends PlausiChecker
+{
+	public function executePlausiCheck($params)
+	{
+		$results = array();
+
+		// pass parameters needed for plausicheck
+		$studiensemester_kurzbz = isset($params['studiensemester_kurzbz']) ? $params['studiensemester_kurzbz'] : null;
+		$studiengang_kz = isset($params['studiengang_kz']) ? $params['studiengang_kz'] : null;
+
+		// get all students failing the plausicheck
+		$prestudentRes = $this->_ci->plausichecklib->getDatumAbschlusspruefungFehlt($studiensemester_kurzbz, $studiengang_kz);
+
+		if (isError($prestudentRes)) return $prestudentRes;
+
+		if (hasData($prestudentRes))
+		{
+			$prestudents = getData($prestudentRes);
+
+			// populate results with data necessary for writing issues
+			foreach ($prestudents as $prestudent)
+			{
+				$results[] = array(
+					'person_id' => $prestudent->person_id,
+					'oe_kurzbz' => $prestudent->prestudent_stg_oe_kurzbz,
+					'fehlertext_params' => array(
+						'prestudent_id' => $prestudent->prestudent_id,
+						'abschlusspruefung_id' => $prestudent->abschlusspruefung_id
+					),
+					'resolution_params' => array('abschlusspruefung_id' => $prestudent->abschlusspruefung_id)
+				);
+			}
+		}
+
+		// return the results
+		return success($results);
+	}
+}
@@ -0,0 +1,47 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+require_once('PlausiChecker.php');
+
+/**
+ *
+ */
+class DatumSponsionFehlt extends PlausiChecker
+{
+	public function executePlausiCheck($params)
+	{
+		$results = array();
+
+		// pass parameters needed for plausicheck
+		$studiensemester_kurzbz = isset($params['studiensemester_kurzbz']) ? $params['studiensemester_kurzbz'] : null;
+		$studiengang_kz = isset($params['studiengang_kz']) ? $params['studiengang_kz'] : null;
+
+		// get all students failing the plausicheck
+		$prestudentRes = $this->_ci->plausichecklib->getDatumSponsionFehlt($studiensemester_kurzbz, $studiengang_kz);
+
+		if (isError($prestudentRes)) return $prestudentRes;
+
+		if (hasData($prestudentRes))
+		{
+			$prestudents = getData($prestudentRes);
+
+			// populate results with data necessary for writing issues
+			foreach ($prestudents as $prestudent)
+			{
+				$results[] = array(
+					'person_id' => $prestudent->person_id,
+					'oe_kurzbz' => $prestudent->prestudent_stg_oe_kurzbz,
+					'fehlertext_params' => array(
+						'prestudent_id' => $prestudent->prestudent_id,
+						'abschlusspruefung_id' => $prestudent->abschlusspruefung_id
+					),
+					'resolution_params' =>  array('abschlusspruefung_id' => $prestudent->abschlusspruefung_id)
+				);
+			}
+		}
+
+		// return the results
+		return success($results);
+	}
+}
@@ -0,0 +1,45 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+require_once('PlausiChecker.php');
+
+/**
+ *
+ */
+class DatumStudiensemesterFalscheReihenfolge extends PlausiChecker
+{
+	public function executePlausiCheck($params)
+	{
+		$results = array();
+
+		// pass parameters needed for plausicheck
+		$studiengang_kz = isset($params['studiengang_kz']) ? $params['studiengang_kz'] : null;
+
+		// get all students failing the plausicheck
+		$prestudentRes = $this->_ci->plausichecklib->getDatumStudiensemesterFalscheReihenfolge($studiengang_kz);
+
+		if (isError($prestudentRes)) return $prestudentRes;
+
+		if (hasData($prestudentRes))
+		{
+			$prestudents = getData($prestudentRes);
+
+			// populate results with data necessary for writing issues
+			foreach ($prestudents as $prestudent)
+			{
+				$results[] = array(
+					'person_id' => $prestudent->person_id,
+					'oe_kurzbz' => $prestudent->prestudent_stg_oe_kurzbz,
+					'fehlertext_params' => array('prestudent_id' => $prestudent->prestudent_id),
+					'resolution_params' => array(
+						'prestudent_id' => $prestudent->prestudent_id
+					)
+				);
+			}
+		}
+
+		// return the results
+		return success($results);
+	}
+}
@@ -0,0 +1,44 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+require_once('PlausiChecker.php');
+
+/**
+ *
+ */
+class FalscheAnzahlAbschlusspruefungen extends PlausiChecker
+{
+	public function executePlausiCheck($params)
+	{
+		$results = array();
+
+		// pass parameters needed for plausicheck
+		$studiensemester_kurzbz = isset($params['studiensemester_kurzbz']) ? $params['studiensemester_kurzbz'] : null;
+		$studiengang_kz = isset($params['studiengang_kz']) ? $params['studiengang_kz'] : null;
+
+		// get all students failing the plausicheck
+		$prestudentRes = $this->_ci->plausichecklib->getFalscheAnzahlAbschlusspruefungen($studiensemester_kurzbz, $studiengang_kz);
+
+		if (isError($prestudentRes)) return $prestudentRes;
+
+		if (hasData($prestudentRes))
+		{
+			$prestudents = getData($prestudentRes);
+
+			// populate results with data necessary for writing issues
+			foreach ($prestudents as $prestudent)
+			{
+				$results[] = array(
+					'person_id' => $prestudent->person_id,
+					'oe_kurzbz' => $prestudent->prestudent_stg_oe_kurzbz,
+					'fehlertext_params' => array('prestudent_id' => $prestudent->prestudent_id),
+					'resolution_params' => array('prestudent_id' => $prestudent->prestudent_id)
+				);
+			}
+		}
+
+		// return the results
+		return success($results);
+	}
+}
@@ -0,0 +1,42 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+require_once('PlausiChecker.php');
+
+/**
+ *
+ */
+class FalscheAnzahlHeimatadressen extends PlausiChecker
+{
+	public function executePlausiCheck($params)
+	{
+		$results = array();
+
+		// pass parameters needed for plausicheck
+		$studiensemester_kurzbz = isset($params['studiensemester_kurzbz']) ? $params['studiensemester_kurzbz'] : null;
+		$studiengang_kz = isset($params['studiengang_kz']) ? $params['studiengang_kz'] : null;
+
+		// get all students failing the plausicheck
+		$personRes = $this->_ci->plausichecklib->getFalscheAnzahlHeimatadressen($studiensemester_kurzbz, $studiengang_kz);
+
+		if (isError($personRes)) return $personRes;
+
+		if (hasData($personRes))
+		{
+			$persons = getData($personRes);
+
+			// populate results with data necessary for writing issues
+			foreach ($persons as $person)
+			{
+				$results[] = array(
+					'person_id' => $person->person_id,
+					'resolution_params' => array('person_id' => $person->person_id)
+				);
+			}
+		}
+
+		// return the results
+		return success($results);
+	}
+}
@@ -0,0 +1,42 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+require_once('PlausiChecker.php');
+
+/**
+ *
+ */
+class FalscheAnzahlZustelladressen extends PlausiChecker
+{
+	public function executePlausiCheck($params)
+	{
+		$results = array();
+
+		// pass parameters needed for plausicheck
+		$studiensemester_kurzbz = isset($params['studiensemester_kurzbz']) ? $params['studiensemester_kurzbz'] : null;
+		$studiengang_kz = isset($params['studiengang_kz']) ? $params['studiengang_kz'] : null;
+
+		// get all students failing the plausicheck
+		$personRes = $this->_ci->plausichecklib->getFalscheAnzahlZustelladressen($studiensemester_kurzbz, $studiengang_kz);
+
+		if (isError($personRes)) return $personRes;
+
+		if (hasData($personRes))
+		{
+			$persons = getData($personRes);
+
+			// populate results with data necessary for writing issues
+			foreach ($persons as $person)
+			{
+				$results[] = array(
+					'person_id' => $person->person_id,
+					'resolution_params' => array('person_id' => $person->person_id)
+				);
+			}
+		}
+
+		// return the results
+		return success($results);
+	}
+}
@@ -0,0 +1,42 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+require_once('PlausiChecker.php');
+
+/**
+ *
+ */
+class GbDatumWeitZurueck extends PlausiChecker
+{
+	public function executePlausiCheck($params)
+	{
+		$results = array();
+
+		// pass parameters needed for plausicheck
+		$studiensemester_kurzbz = isset($params['studiensemester_kurzbz']) ? $params['studiensemester_kurzbz'] : null;
+		$studiengang_kz = isset($params['studiengang_kz']) ? $params['studiengang_kz'] : null;
+
+		// get all students failing the plausicheck
+		$personRes = $this->_ci->plausichecklib->getGbDatumWeitZurueck($studiensemester_kurzbz, $studiengang_kz);
+
+		if (isError($personRes)) return $personRes;
+
+		if (hasData($personRes))
+		{
+			$persons = getData($personRes);
+
+			// populate results with data necessary for writing issues
+			foreach ($persons as $person)
+			{
+				$results[] = array(
+					'person_id' => $person->person_id,
+					'resolution_params' => array('person_id' => $person->person_id)
+				);
+			}
+		}
+
+		// return the results
+		return success($results);
+	}
+}
@@ -0,0 +1,47 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+require_once('PlausiChecker.php');
+
+/**
+ *
+ */
+class InaktiverStudentAktiverStatus extends PlausiChecker
+{
+	public function executePlausiCheck($params)
+	{
+		$results = array();
+
+		// pass parameters needed for plausicheck
+		$studiensemester_kurzbz = isset($params['studiensemester_kurzbz']) ? $params['studiensemester_kurzbz'] : null;
+		$studiengang_kz = isset($params['studiengang_kz']) ? $params['studiengang_kz'] : null;
+
+		// get all students failing the plausicheck
+		$prestudentRes = $this->_ci->plausichecklib->getInaktiverStudentAktiverStatus($studiensemester_kurzbz, $studiengang_kz);
+
+		if (isError($prestudentRes)) return $prestudentRes;
+
+		if (hasData($prestudentRes))
+		{
+			$prestudents = getData($prestudentRes);
+
+			// populate results with data necessary for writing issues
+			foreach ($prestudents as $prestudent)
+			{
+				$results[] = array(
+					'person_id' => $prestudent->person_id,
+					'oe_kurzbz' => $prestudent->prestudent_stg_oe_kurzbz,
+					'fehlertext_params' => array('prestudent_id' => $prestudent->prestudent_id),
+					'resolution_params' => array(
+						'prestudent_id' => $prestudent->prestudent_id,
+						'studiensemester_kurzbz' => $studiensemester_kurzbz
+					)
+				);
+			}
+		}
+
+		// return the results
+		return success($results);
+	}
+}
@@ -0,0 +1,42 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+require_once('PlausiChecker.php');
+
+/**
+ *
+ */
+class IncomingHeimatNationOesterreich extends PlausiChecker
+{
+	public function executePlausiCheck($params)
+	{
+		$results = array();
+
+		// pass parameters needed for plausicheck
+		$studiensemester_kurzbz = isset($params['studiensemester_kurzbz']) ? $params['studiensemester_kurzbz'] : null;
+		$studiengang_kz = isset($params['studiengang_kz']) ? $params['studiengang_kz'] : null;
+
+		// get all students failing the plausicheck
+		$personRes = $this->_ci->plausichecklib->getIncomingHeimatNationOesterreich($studiensemester_kurzbz, $studiengang_kz);
+
+		if (isError($personRes)) return $personRes;
+
+		if (hasData($personRes))
+		{
+			$persons = getData($personRes);
+
+			// populate results with data necessary for writing issues
+			foreach ($persons as $person)
+			{
+				$results[] = array(
+					'person_id' => $person->person_id,
+					'resolution_params' => array('person_id' => $person->person_id, 'studiensemester_kurzbz' => $studiensemester_kurzbz)
+				);
+			}
+		}
+
+		// return the results
+		return success($results);
+	}
+}
@@ -0,0 +1,43 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+require_once('PlausiChecker.php');
+
+/**
+ *
+ */
+class IncomingOhneIoDatensatz extends PlausiChecker
+{
+	public function executePlausiCheck($params)
+	{
+		$results = array();
+
+		// pass parameters needed for plausicheck
+		$studiengang_kz = isset($params['studiengang_kz']) ? $params['studiengang_kz'] : null;
+
+		// get all students failing the plausicheck
+		$prestudentRes = $this->_ci->plausichecklib->getIncomingOhneIoDatensatz($studiengang_kz);
+
+		if (isError($prestudentRes)) return $prestudentRes;
+
+		if (hasData($prestudentRes))
+		{
+			$prestudents = getData($prestudentRes);
+
+			// populate results with data necessary for writing issues
+			foreach ($prestudents as $prestudent)
+			{
+				$results[] = array(
+					'person_id' => $prestudent->person_id,
+					'oe_kurzbz' => $prestudent->prestudent_stg_oe_kurzbz,
+					'fehlertext_params' => array('prestudent_id' => $prestudent->prestudent_id),
+					'resolution_params' => array('prestudent_id' => $prestudent->prestudent_id)
+				);
+			}
+		}
+
+		// return the results
+		return success($results);
+	}
+}
@@ -0,0 +1,44 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+require_once('PlausiChecker.php');
+
+/**
+ *
+ */
+class IncomingOrGsFoerderrelevant extends PlausiChecker
+{
+	public function executePlausiCheck($params)
+	{
+		$results = array();
+
+		// pass parameters needed for plausicheck
+		$studiensemester_kurzbz = isset($params['studiensemester_kurzbz']) ? $params['studiensemester_kurzbz'] : null;
+		$studiengang_kz = isset($params['studiengang_kz']) ? $params['studiengang_kz'] : null;
+
+		// get all students failing the plausicheck
+		$prestudentRes = $this->_ci->plausichecklib->getIncomingOrGsFoerderrelevant($studiensemester_kurzbz, $studiengang_kz);
+
+		if (isError($prestudentRes)) return $prestudentRes;
+
+		if (hasData($prestudentRes))
+		{
+			$prestudents = getData($prestudentRes);
+
+			// populate results with data necessary for writing issues
+			foreach ($prestudents as $prestudent)
+			{
+				$results[] = array(
+					'person_id' => $prestudent->person_id,
+					'oe_kurzbz' => $prestudent->prestudent_stg_oe_kurzbz,
+					'fehlertext_params' => array('prestudent_id' => $prestudent->prestudent_id),
+					'resolution_params' => array('prestudent_id' => $prestudent->prestudent_id)
+				);
+			}
+		}
+
+		// return the results
+		return success($results);
+	}
+}
@@ -0,0 +1,51 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+require_once('PlausiChecker.php');
+
+/**
+ *
+ */
+class InskriptionVorLetzerBismeldung extends PlausiChecker
+{
+	public function executePlausiCheck($params)
+	{
+		$results = array();
+
+		// pass parameters needed for plausicheck
+		$studiensemester_kurzbz = isset($params['studiensemester_kurzbz']) ? $params['studiensemester_kurzbz'] : null;
+		$studiengang_kz = isset($params['studiengang_kz']) ? $params['studiengang_kz'] : null;
+
+		// get all students failing the plausicheck
+		$prestudentRes = $this->_ci->plausichecklib->getInskriptionVorLetzerBismeldung($studiensemester_kurzbz, $studiengang_kz);
+
+		if (isError($prestudentRes)) return $prestudentRes;
+
+		if (hasData($prestudentRes))
+		{
+			$prestudents = getData($prestudentRes);
+
+			// populate results with data necessary for writing issues
+			foreach ($prestudents as $prestudent)
+			{
+				$results[] = array(
+					'person_id' => $prestudent->person_id,
+					'oe_kurzbz' => $prestudent->prestudent_stg_oe_kurzbz,
+					'fehlertext_params' => array(
+						'datum_bismeldung' => date_format(date_create($prestudent->datum_bismeldung), 'd.m.Y'),
+						'prestudent_id' => $prestudent->prestudent_id,
+						'studiensemester_kurzbz' => $prestudent->studiensemester_kurzbz
+					),
+					'resolution_params' => array(
+						'prestudent_id' => $prestudent->prestudent_id,
+						'studiensemester_kurzbz' => $prestudent->studiensemester_kurzbz
+					)
+				);
+			}
+		}
+
+		// return the results
+		return success($results);
+	}
+}
@@ -0,0 +1,42 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+require_once('PlausiChecker.php');
+
+/**
+ *
+ */
+class NationNichtOesterreichAberGemeinde extends PlausiChecker
+{
+	public function executePlausiCheck($params)
+	{
+		$results = array();
+
+		// pass parameters needed for plausicheck
+		$studiengang_kz = isset($params['studiengang_kz']) ? $params['studiengang_kz'] : null;
+
+		// get all students failing the plausicheck
+		$personRes = $this->_ci->plausichecklib->getNationNichtOesterreichAberGemeinde($studiengang_kz);
+
+		if (isError($personRes)) return $personRes;
+
+		if (hasData($personRes))
+		{
+			$persons = getData($personRes);
+
+			// populate results with data necessary for writing issues
+			foreach ($persons as $person)
+			{
+				$results[] = array(
+					'person_id' => $person->person_id,
+					'fehlertext_params' => array('gemeinde' => $person->gemeinde, 'adresse_id' => $person->adresse_id),
+					'resolution_params' => array('adresse_id' => $person->adresse_id)
+				);
+			}
+		}
+
+		// return the results
+		return success($results);
+	}
+}
@@ -0,0 +1,52 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+require_once('PlausiChecker.php');
+
+/**
+ *
+ */
+class OrgformStgUngleichOrgformPrestudent extends PlausiChecker
+{
+	public function executePlausiCheck($params)
+	{
+		$results = array();
+
+		// pass parameters needed for plausicheck
+		$studiensemester_kurzbz = isset($params['studiensemester_kurzbz']) ? $params['studiensemester_kurzbz'] : null;
+		$studiengang_kz = isset($params['studiengang_kz']) ? $params['studiengang_kz'] : null;
+
+		// get all students failing the plausicheck
+		$prestudentRes = $this->_ci->plausichecklib->getOrgformStgUngleichOrgformPrestudent($studiensemester_kurzbz, $studiengang_kz);
+
+		if (isError($prestudentRes)) return $prestudentRes;
+
+		if (hasData($prestudentRes))
+		{
+			$prestudents = getData($prestudentRes);
+
+			// populate results with data necessary for writing issues
+			foreach ($prestudents as $prestudent)
+			{
+				$results[] = array(
+					'person_id' => $prestudent->person_id,
+					'oe_kurzbz' => $prestudent->prestudent_stg_oe_kurzbz,
+					'fehlertext_params' => array(
+						'student_studiengang' => $prestudent->student_studiengang,
+						'student_orgform' => $prestudent->student_orgform,
+						'prestudent_id' => $prestudent->prestudent_id,
+						'studiensemester_kurzbz' => $prestudent->studiensemester_kurzbz
+					),
+					'resolution_params' => array(
+						'prestudent_id' => $prestudent->prestudent_id,
+						'studiensemester_kurzbz' => $prestudent->studiensemester_kurzbz
+					)
+				);
+			}
+		}
+
+		// return the results
+		return success($results);
+	}
+}
@@ -0,0 +1,24 @@
+<?php
+
+/**
+ * class defining ressources and method to use for plausicheck issue producer
+ */
+abstract class PlausiChecker
+{
+	protected $_ci; // code igniter instance
+
+	public function __construct()
+	{
+		$this->_ci =& get_instance(); // get code igniter instance
+
+		// load libraries
+		$this->_ci->load->library('issues/PlausicheckLib'); // load plausicheck library
+	}
+
+	/**
+	 * Executes a plausi check.
+	 * @param $paramsForChecking array parameters needed for executing the check
+	 * @return array with objects which failed the plausi check
+	 */
+	abstract public function executePlausiCheck($paramsForChecking);
+}
@@ -0,0 +1,50 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+require_once('PlausiChecker.php');
+
+/**
+ *
+ */
+class PrestudentMischformOhneOrgform extends PlausiChecker
+{
+	public function executePlausiCheck($params)
+	{
+		$results = array();
+
+		// pass parameters needed for plausicheck
+		$studiensemester_kurzbz = isset($params['studiensemester_kurzbz']) ? $params['studiensemester_kurzbz'] : null;
+		$studiengang_kz = isset($params['studiengang_kz']) ? $params['studiengang_kz'] : null;
+
+		// get all students failing the plausicheck
+		$prestudentRes = $this->_ci->plausichecklib->getPrestudentMischformOhneOrgform($studiensemester_kurzbz, $studiengang_kz);
+
+		if (isError($prestudentRes)) return $prestudentRes;
+
+		if (hasData($prestudentRes))
+		{
+			$prestudents = getData($prestudentRes);
+
+			// populate results with data necessary for writing issues
+			foreach ($prestudents as $prestudent)
+			{
+				$results[] = array(
+					'person_id' => $prestudent->person_id,
+					'oe_kurzbz' => $prestudent->prestudent_stg_oe_kurzbz,
+					'fehlertext_params' => array(
+						'prestudent_id' => $prestudent->prestudent_id,
+						'studiensemester_kurzbz' => $prestudent->studiensemester_kurzbz
+					),
+					'resolution_params' => array(
+						'prestudent_id' => $prestudent->prestudent_id,
+						'studiensemester_kurzbz' => $prestudent->studiensemester_kurzbz
+					)
+				);
+			}
+		}
+
+		// return the results
+		return success($results);
+	}
+}
@@ -0,0 +1,43 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+require_once('PlausiChecker.php');
+
+/**
+ *
+ */
+class StgPrestudentUngleichStgStudent extends PlausiChecker
+{
+	public function executePlausiCheck($params)
+	{
+		$results = array();
+
+		// pass parameters needed for plausicheck
+		$studiengang_kz = isset($params['studiengang_kz']) ? $params['studiengang_kz'] : null;
+
+		// get all students failing the plausicheck
+		$prestudentRes = $this->_ci->plausichecklib->getStgPrestudentUngleichStgStudent($studiengang_kz);
+
+		if (isError($prestudentRes)) return $prestudentRes;
+
+		if (hasData($prestudentRes))
+		{
+			$prestudents = getData($prestudentRes);
+
+			// populate results with data necessary for writing issues
+			foreach ($prestudents as $prestudent)
+			{
+				$results[] = array(
+					'person_id' => $prestudent->person_id,
+					'oe_kurzbz' => $prestudent->prestudent_stg_oe_kurzbz,
+					'fehlertext_params' => array('prestudent_id' => $prestudent->prestudent_id),
+					'resolution_params' => array('prestudent_id' => $prestudent->prestudent_id)
+				);
+			}
+		}
+
+		// return the results
+		return success($results);
+	}
+}
@@ -0,0 +1,43 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+require_once('PlausiChecker.php');
+
+/**
+ *
+ */
+class StgPrestudentUngleichStgStudienplan extends PlausiChecker
+{
+	public function executePlausiCheck($params)
+	{
+		$results = array();
+
+		// pass parameters needed for plausicheck
+		$studiengang_kz = isset($params['studiengang_kz']) ? $params['studiengang_kz'] : null;
+
+		// get all students failing the plausicheck
+		$prestudentRes = $this->_ci->plausichecklib->getStgPrestudentUngleichStgStudienplan($studiengang_kz);
+
+		if (isError($prestudentRes)) return $prestudentRes;
+
+		if (hasData($prestudentRes))
+		{
+			$prestudents = getData($prestudentRes);
+
+			// populate results with data necessary for writing issues
+			foreach ($prestudents as $prestudent)
+			{
+				$results[] = array(
+					'person_id' => $prestudent->person_id,
+					'oe_kurzbz' => $prestudent->prestudent_stg_oe_kurzbz,
+					'fehlertext_params' => array('prestudent_id' => $prestudent->prestudent_id, 'studienplan' => $prestudent->studienplan),
+					'resolution_params' => array('prestudent_id' => $prestudent->prestudent_id, 'studienordnung_id' => $prestudent->studienordnung_id)
+				);
+			}
+		}
+
+		// return the results
+		return success($results);
+	}
+}
@@ -0,0 +1,43 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+require_once('PlausiChecker.php');
+
+/**
+ *
+ */
+class StudentstatusNachAbbrecher extends PlausiChecker
+{
+	public function executePlausiCheck($params)
+	{
+		$results = array();
+
+		// pass parameters needed for plausicheck
+		$studiengang_kz = isset($params['studiengang_kz']) ? $params['studiengang_kz'] : null;
+
+		// get all students failing the plausicheck
+		$prestudentRes = $this->_ci->plausichecklib->getStudentstatusNachAbbrecher($studiengang_kz);
+
+		if (isError($prestudentRes)) return $prestudentRes;
+
+		if (hasData($prestudentRes))
+		{
+			$prestudents = getData($prestudentRes);
+
+			// populate results with data necessary for writing issues
+			foreach ($prestudents as $prestudent)
+			{
+				$results[] = array(
+					'person_id' => $prestudent->person_id,
+					'oe_kurzbz' => $prestudent->prestudent_stg_oe_kurzbz,
+					'fehlertext_params' => array('prestudent_id' => $prestudent->prestudent_id),
+					'resolution_params' => array('prestudent_id' => $prestudent->prestudent_id)
+				);
+			}
+		}
+
+		// return the results
+		return success($results);
+	}
+}
@@ -0,0 +1,51 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+require_once('PlausiChecker.php');
+
+/**
+ *
+ */
+class StudienplanUngueltig extends PlausiChecker
+{
+	public function executePlausiCheck($params)
+	{
+		$results = array();
+
+		// pass parameters needed for plausicheck
+		$studiensemester_kurzbz = isset($params['studiensemester_kurzbz']) ? $params['studiensemester_kurzbz'] : null;
+		$studiengang_kz = isset($params['studiengang_kz']) ? $params['studiengang_kz'] : null;
+
+		// get all students failing the plausicheck
+		$prestudentRes = $this->_ci->plausichecklib->getStudienplanUngueltig($studiensemester_kurzbz, $studiengang_kz);
+
+		if (isError($prestudentRes)) return $prestudentRes;
+
+		if (hasData($prestudentRes))
+		{
+			$prestudents = getData($prestudentRes);
+
+			// populate results with data necessary for writing issues
+			foreach ($prestudents as $prestudent)
+			{
+				$results[] = array(
+					'person_id' => $prestudent->person_id,
+					'oe_kurzbz' => $prestudent->prestudent_stg_oe_kurzbz,
+					'fehlertext_params' => array(
+						'studienplan' => $prestudent->studienplan,
+						'ausbildungssemester' => $prestudent->ausbildungssemester,
+						'prestudent_id' => $prestudent->prestudent_id
+					),
+					'resolution_params' => array(
+						'prestudent_id' => $prestudent->prestudent_id,
+						'studiensemester_kurzbz' => $prestudent->studiensemester_kurzbz
+					)
+				);
+			}
+		}
+
+		// return the results
+		return success($results);
+	}
+}
@@ -15,7 +15,6 @@ class CORE_INOUT_0006 implements IIssueResolvedChecker
 		$this->_ci =& get_instance(); // get code igniter instance

 		$this->_ci->load->model('codex/Bisio_model', 'BisioModel');
-		//$this->_ci->load->model('codex/Aufenthaltfoerderung_model', 'AufenthaltfoerderungModel');

 		// get all Zwecke
 		$this->_ci->BisioModel->addSelect('ects_erworben');
@@ -0,0 +1,32 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * Incoming shouldn't have austrian home address.
+ */
+class CORE_INOUT_0007 implements IIssueResolvedChecker
+{
+	public function checkIfIssueIsResolved($params)
+	{
+		if (!isset($params['issue_person_id']) || !is_numeric($params['issue_person_id']))
+			return error('Person Id missing, issue_id: '.$params['issue_id']);
+
+		if (!isset($params['studiensemester_kurzbz']) || isEmptyString($params['studiensemester_kurzbz']))
+			return error('Studiensemester missing, issue_id: '.$params['issue_id']);
+
+		$this->_ci =& get_instance(); // get code igniter instance
+
+		$this->_ci->load->library('issues/PlausicheckLib');
+
+		// check if issue persists
+		$checkRes = $this->_ci->plausichecklib->getIncomingHeimatNationOesterreich($params['studiensemester_kurzbz'], null, $params['issue_person_id']);
+
+		if (isError($checkRes)) return $checkRes;
+
+		if (hasData($checkRes))
+			return success(false); // not resolved if issue is still present
+		else
+			return success(true); // resolved otherwise
+	}
+}
@@ -0,0 +1,29 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * Incoming shouldn't have austrian home address.
+ */
+class CORE_INOUT_0008 implements IIssueResolvedChecker
+{
+	public function checkIfIssueIsResolved($params)
+	{
+		if (!isset($params['prestudent_id']) || !is_numeric($params['prestudent_id']))
+			return error('Prestudent Id missing, issue_id: '.$params['issue_id']);
+
+		$this->_ci =& get_instance(); // get code igniter instance
+
+		$this->_ci->load->library('issues/PlausicheckLib');
+
+		// check if issue persists
+		$checkRes = $this->_ci->plausichecklib->getIncomingOhneIoDatensatz(null, $params['prestudent_id']);
+
+		if (isError($checkRes)) return $checkRes;
+
+		if (hasData($checkRes))
+			return success(false); // not resolved if issue is still present
+		else
+			return success(true); // resolved otherwise
+	}
+}
@@ -0,0 +1,29 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * Incoming or external GS student should not be foerderrelevant.
+ */
+class CORE_INOUT_0009 implements IIssueResolvedChecker
+{
+	public function checkIfIssueIsResolved($params)
+	{
+		if (!isset($params['prestudent_id']) || !is_numeric($params['prestudent_id']))
+			return error('Prestudent Id missing, issue_id: '.$params['issue_id']);
+
+		$this->_ci =& get_instance(); // get code igniter instance
+
+		$this->_ci->load->library('issues/PlausicheckLib');
+
+		// check if issue persists
+		$checkRes = $this->_ci->plausichecklib->getIncomingOrGsFoerderrelevant(null, null, $params['prestudent_id']);
+
+		if (isError($checkRes)) return $checkRes;
+
+		if (hasData($checkRes))
+			return success(false); // not resolved if issue is still present
+		else
+			return success(true); // resolved otherwise
+	}
+}
@@ -0,0 +1,29 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * Incoming shouldn't have austrian home address.
+ */
+class CORE_PERSON_0001 implements IIssueResolvedChecker
+{
+	public function checkIfIssueIsResolved($params)
+	{
+		if (!isset($params['issue_person_id']) || !is_numeric($params['issue_person_id']))
+			return error('Person Id missing, issue_id: '.$params['issue_id']);
+
+		$this->_ci =& get_instance(); // get code igniter instance
+
+		$this->_ci->load->library('issues/PlausicheckLib');
+
+		// check if issue persists
+		$checkRes = $this->_ci->plausichecklib->getGbDatumWeitZurueck(null, null, $params['issue_person_id']);
+
+		if (isError($checkRes)) return $checkRes;
+
+		if (hasData($checkRes))
+			return success(false); // not resolved if issue is still present
+		else
+			return success(true); // resolved otherwise
+	}
+}
@@ -0,0 +1,29 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * Incoming shouldn't have austrian home address.
+ */
+class CORE_PERSON_0002 implements IIssueResolvedChecker
+{
+	public function checkIfIssueIsResolved($params)
+	{
+		if (!isset($params['issue_person_id']) || !is_numeric($params['issue_person_id']))
+			return error('Person Id missing, issue_id: '.$params['issue_id']);
+
+		$this->_ci =& get_instance(); // get code igniter instance
+
+		$this->_ci->load->library('issues/PlausicheckLib');
+
+		// check if issue persists
+		$checkRes = $this->_ci->plausichecklib->getNationNichtOesterreichAberGemeinde(null, $params['issue_person_id']);
+
+		if (isError($checkRes)) return $checkRes;
+
+		if (hasData($checkRes))
+			return success(false); // not resolved if issue is still present
+		else
+			return success(true); // resolved otherwise
+	}
+}
@@ -0,0 +1,29 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * Incoming shouldn't have austrian home address.
+ */
+class CORE_PERSON_0003 implements IIssueResolvedChecker
+{
+	public function checkIfIssueIsResolved($params)
+	{
+		if (!isset($params['issue_person_id']) || !is_numeric($params['issue_person_id']))
+			return error('Person Id missing, issue_id: '.$params['issue_id']);
+
+		$this->_ci =& get_instance(); // get code igniter instance
+
+		$this->_ci->load->library('issues/PlausicheckLib');
+
+		// check if issue persists
+		$checkRes = $this->_ci->plausichecklib->getFalscheAnzahlHeimatadressen(null, null, $params['issue_person_id']);
+
+		if (isError($checkRes)) return $checkRes;
+
+		if (hasData($checkRes))
+			return success(false); // not resolved if issue is still present
+		else
+			return success(true); // resolved otherwise
+	}
+}
@@ -0,0 +1,29 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * Incoming shouldn't have austrian home address.
+ */
+class CORE_PERSON_0004 implements IIssueResolvedChecker
+{
+	public function checkIfIssueIsResolved($params)
+	{
+		if (!isset($params['issue_person_id']) || !is_numeric($params['issue_person_id']))
+			return error('Person Id missing, issue_id: '.$params['issue_id']);
+
+		$this->_ci =& get_instance(); // get code igniter instance
+
+		$this->_ci->load->library('issues/PlausicheckLib');
+
+		// check if issue persists
+		$checkRes = $this->_ci->plausichecklib->getFalscheAnzahlZustelladressen(null, null, $params['issue_person_id']);
+
+		if (isError($checkRes)) return $checkRes;
+
+		if (hasData($checkRes))
+			return success(false); // not resolved if issue is still present
+		else
+			return success(true); // resolved otherwise
+	}
+}
@@ -0,0 +1,29 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * Incoming shouldn't have austrian home address.
+ */
+class CORE_STG_0001 implements IIssueResolvedChecker
+{
+	public function checkIfIssueIsResolved($params)
+	{
+		if (!isset($params['prestudent_id']) || !is_numeric($params['prestudent_id']))
+			return error('Prestudent Id missing, issue_id: '.$params['issue_id']);
+
+		$this->_ci =& get_instance(); // get code igniter instance
+
+		$this->_ci->load->library('issues/PlausicheckLib');
+
+		// check if issue persists
+		$checkRes = $this->_ci->plausichecklib->getStgPrestudentUngleichStgStudent(null, $params['prestudent_id']);
+
+		if (isError($checkRes)) return $checkRes;
+
+		if (hasData($checkRes))
+			return success(false); // not resolved if issue is still present
+		else
+			return success(true); // resolved otherwise
+	}
+}
@@ -0,0 +1,32 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * Incoming shouldn't have austrian home address.
+ */
+class CORE_STG_0002 implements IIssueResolvedChecker
+{
+	public function checkIfIssueIsResolved($params)
+	{
+		if (!isset($params['prestudent_id']) || !is_numeric($params['prestudent_id']))
+			return error('Prestudent Id missing, issue_id: '.$params['issue_id']);
+
+		if (!isset($params['studiensemester_kurzbz']) || isEmptyString($params['studiensemester_kurzbz']))
+			return error('Studiensemester missing, issue_id: '.$params['issue_id']);
+
+		$this->_ci =& get_instance(); // get code igniter instance
+
+		$this->_ci->load->library('issues/PlausicheckLib');
+
+		// check if issue persists
+		$checkRes = $this->_ci->plausichecklib->getOrgformStgUngleichOrgformPrestudent($params['studiensemester_kurzbz'], null, $params['prestudent_id']);
+
+		if (isError($checkRes)) return $checkRes;
+
+		if (hasData($checkRes))
+			return success(false); // not resolved if issue is still present
+		else
+			return success(true); // resolved otherwise
+	}
+}
@@ -0,0 +1,32 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * Incoming shouldn't have austrian home address.
+ */
+class CORE_STG_0003 implements IIssueResolvedChecker
+{
+	public function checkIfIssueIsResolved($params)
+	{
+		if (!isset($params['prestudent_id']) || !is_numeric($params['prestudent_id']))
+			return error('Prestudent Id missing, issue_id: '.$params['issue_id']);
+
+		if (!isset($params['studiensemester_kurzbz']) || isEmptyString($params['studiensemester_kurzbz']))
+			return error('Studiensemester missing, issue_id: '.$params['issue_id']);
+
+		$this->_ci =& get_instance(); // get code igniter instance
+
+		$this->_ci->load->library('issues/PlausicheckLib');
+
+		// check if issue persists
+		$checkRes = $this->_ci->plausichecklib->getPrestudentMischformOhneOrgform($params['studiensemester_kurzbz'], null, $params['prestudent_id']);
+
+		if (isError($checkRes)) return $checkRes;
+
+		if (hasData($checkRes))
+			return success(false); // not resolved if issue is still present
+		else
+			return success(true); // resolved otherwise
+	}
+}
@@ -0,0 +1,32 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * Incoming shouldn't have austrian home address.
+ */
+class CORE_STG_0004 implements IIssueResolvedChecker
+{
+	public function checkIfIssueIsResolved($params)
+	{
+		if (!isset($params['prestudent_id']) || !is_numeric($params['prestudent_id']))
+			return error('Prestudent Id missing, issue_id: '.$params['issue_id']);
+
+		if (!isset($params['studienordnung_id']) || !is_numeric($params['studienordnung_id']))
+			return error('Studienordnung Id missing, issue_id: '.$params['issue_id']);
+
+		$this->_ci =& get_instance(); // get code igniter instance
+
+		$this->_ci->load->library('issues/PlausicheckLib');
+
+		// check if issue persists
+		$checkRes = $this->_ci->plausichecklib->getStgPrestudentUngleichStgStudienplan(null, $params['prestudent_id'], $params['studienordnung_id']);
+
+		if (isError($checkRes)) return $checkRes;
+
+		if (hasData($checkRes))
+			return success(false); // not resolved if issue is still present
+		else
+			return success(true); // resolved otherwise
+	}
+}
@@ -0,0 +1,29 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * Incoming shouldn't have austrian home address.
+ */
+class CORE_STUDENTSTATUS_0001 implements IIssueResolvedChecker
+{
+	public function checkIfIssueIsResolved($params)
+	{
+		if (!isset($params['prestudent_id']) || !is_numeric($params['prestudent_id']))
+			return error('Prestudent Id missing, issue_id: '.$params['issue_id']);
+
+		$this->_ci =& get_instance(); // get code igniter instance
+
+		$this->_ci->load->library('issues/PlausicheckLib');
+
+		// check if issue persists
+		$checkRes = $this->_ci->plausichecklib->getAbbrecherAktiv(null, $params['prestudent_id']);
+
+		if (isError($checkRes)) return $checkRes;
+
+		if (hasData($checkRes))
+			return success(false); // not resolved if issue is still present
+		else
+			return success(true); // resolved otherwise
+	}
+}
@@ -0,0 +1,29 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * Incoming shouldn't have austrian home address.
+ */
+class CORE_STUDENTSTATUS_0002 implements IIssueResolvedChecker
+{
+	public function checkIfIssueIsResolved($params)
+	{
+		if (!isset($params['prestudent_id']) || !is_numeric($params['prestudent_id']))
+			return error('Prestudent Id missing, issue_id: '.$params['issue_id']);
+
+		$this->_ci =& get_instance(); // get code igniter instance
+
+		$this->_ci->load->library('issues/PlausicheckLib');
+
+		// check if issue persists
+		$checkRes = $this->_ci->plausichecklib->getStudentstatusNachAbbrecher(null, $params['prestudent_id']);
+
+		if (isError($checkRes)) return $checkRes;
+
+		if (hasData($checkRes))
+			return success(false); // not resolved if issue is still present
+		else
+			return success(true); // resolved otherwise
+	}
+}
@@ -0,0 +1,32 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * Incoming shouldn't have austrian home address.
+ */
+class CORE_STUDENTSTATUS_0003 implements IIssueResolvedChecker
+{
+	public function checkIfIssueIsResolved($params)
+	{
+		if (!isset($params['prestudent_id']) || !is_numeric($params['prestudent_id']))
+			return error('Prestudent Id missing, issue_id: '.$params['issue_id']);
+
+		if (!isset($params['studiensemester_kurzbz']) || isEmptyString($params['studiensemester_kurzbz']))
+			return error('Studiensemester missing, issue_id: '.$params['issue_id']);
+
+		$this->_ci =& get_instance(); // get code igniter instance
+
+		$this->_ci->load->library('issues/PlausicheckLib');
+
+		// check if issue persists
+		$checkRes = $this->_ci->plausichecklib->getAusbildungssemPrestudentUngleichAusbildungssemStatus($params['studiensemester_kurzbz'], null, $params['prestudent_id']);
+
+		if (isError($checkRes)) return $checkRes;
+
+		if (hasData($checkRes))
+			return success(false); // not resolved if issue is still present
+		else
+			return success(true); // resolved otherwise
+	}
+}
@@ -0,0 +1,32 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * Incoming shouldn't have austrian home address.
+ */
+class CORE_STUDENTSTATUS_0004 implements IIssueResolvedChecker
+{
+	public function checkIfIssueIsResolved($params)
+	{
+		if (!isset($params['prestudent_id']) || !is_numeric($params['prestudent_id']))
+			return error('Prestudent Id missing, issue_id: '.$params['issue_id']);
+
+		if (!isset($params['studiensemester_kurzbz']) || isEmptyString($params['studiensemester_kurzbz']))
+			return error('Studiensemester missing, issue_id: '.$params['issue_id']);
+
+		$this->_ci =& get_instance(); // get code igniter instance
+
+		$this->_ci->load->library('issues/PlausicheckLib');
+
+		// check if issue persists
+		$checkRes = $this->_ci->plausichecklib->getInaktiverStudentAktiverStatus($params['studiensemester_kurzbz'], null, $params['prestudent_id']);
+
+		if (isError($checkRes)) return $checkRes;
+
+		if (hasData($checkRes))
+			return success(false); // not resolved if issue is still present
+		else
+			return success(true); // resolved otherwise
+	}
+}
@@ -0,0 +1,32 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * Incoming shouldn't have austrian home address.
+ */
+class CORE_STUDENTSTATUS_0005 implements IIssueResolvedChecker
+{
+	public function checkIfIssueIsResolved($params)
+	{
+		if (!isset($params['prestudent_id']) || !is_numeric($params['prestudent_id']))
+			return error('Prestudent Id missing, issue_id: '.$params['issue_id']);
+
+		if (!isset($params['studiensemester_kurzbz']) || isEmptyString($params['studiensemester_kurzbz']))
+			return error('Studiensemester missing, issue_id: '.$params['issue_id']);
+
+		$this->_ci =& get_instance(); // get code igniter instance
+
+		$this->_ci->load->library('issues/PlausicheckLib');
+
+		// check if issue persists
+		$checkRes = $this->_ci->plausichecklib->getInskriptionVorLetzerBismeldung($params['studiensemester_kurzbz'], null, $params['prestudent_id']);
+
+		if (isError($checkRes)) return $checkRes;
+
+		if (hasData($checkRes))
+			return success(false); // not resolved if issue is still present
+		else
+			return success(true); // resolved otherwise
+	}
+}
@@ -0,0 +1,29 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * Incoming shouldn't have austrian home address.
+ */
+class CORE_STUDENTSTATUS_0006 implements IIssueResolvedChecker
+{
+	public function checkIfIssueIsResolved($params)
+	{
+		if (!isset($params['prestudent_id']) || !is_numeric($params['prestudent_id']))
+			return error('Prestudent Id missing, issue_id: '.$params['issue_id']);
+
+		$this->_ci =& get_instance(); // get code igniter instance
+
+		$this->_ci->load->library('issues/PlausicheckLib');
+
+		// check if issue persists
+		$checkRes = $this->_ci->plausichecklib->getDatumStudiensemesterFalscheReihenfolge(null, $params['prestudent_id']);
+
+		if (isError($checkRes)) return $checkRes;
+
+		if (hasData($checkRes))
+			return success(false); // not resolved if issue is still present
+		else
+			return success(true); // resolved otherwise
+	}
+}
@@ -0,0 +1,29 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * Incoming shouldn't have austrian home address.
+ */
+class CORE_STUDENTSTATUS_0007 implements IIssueResolvedChecker
+{
+	public function checkIfIssueIsResolved($params)
+	{
+		if (!isset($params['prestudent_id']) || !is_numeric($params['prestudent_id']))
+			return error('Prestudent Id missing, issue_id: '.$params['issue_id']);
+
+		$this->_ci =& get_instance(); // get code igniter instance
+
+		$this->_ci->load->library('issues/PlausicheckLib');
+
+		// check if issue persists
+		$checkRes = $this->_ci->plausichecklib->getAktiverStudentOhneStatus(null, $params['prestudent_id']);
+
+		if (isError($checkRes)) return $checkRes;
+
+		if (hasData($checkRes))
+			return success(false); // not resolved if issue is still present
+		else
+			return success(true); // resolved otherwise
+	}
+}
@@ -0,0 +1,32 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * Incoming shouldn't have austrian home address.
+ */
+class CORE_STUDENTSTATUS_0008 implements IIssueResolvedChecker
+{
+	public function checkIfIssueIsResolved($params)
+	{
+		if (!isset($params['prestudent_id']) || !is_numeric($params['prestudent_id']))
+			return error('Prestudent Id missing, issue_id: '.$params['issue_id']);
+
+		if (!isset($params['studiensemester_kurzbz']) || isEmptyString($params['studiensemester_kurzbz']))
+			return error('Studiensemester missing, issue_id: '.$params['issue_id']);
+
+		$this->_ci =& get_instance(); // get code igniter instance
+
+		$this->_ci->load->library('issues/PlausicheckLib');
+
+		// check if issue persists
+		$checkRes = $this->_ci->plausichecklib->getStudienplanUngueltig($params['studiensemester_kurzbz'], null, $params['prestudent_id']);
+
+		if (isError($checkRes)) return $checkRes;
+
+		if (hasData($checkRes))
+			return success(false); // not resolved if issue is still present
+		else
+			return success(true); // resolved otherwise
+	}
+}
@@ -0,0 +1,29 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * Incoming shouldn't have austrian home address.
+ */
+class CORE_STUDENTSTATUS_0009 implements IIssueResolvedChecker
+{
+	public function checkIfIssueIsResolved($params)
+	{
+		if (!isset($params['prestudent_id']) || !is_numeric($params['prestudent_id']))
+			return error('Prestudent Id missing, issue_id: '.$params['issue_id']);
+
+		$this->_ci =& get_instance(); // get code igniter instance
+
+		$this->_ci->load->library('issues/PlausicheckLib');
+
+		// check if issue persists
+		$checkRes = $this->_ci->plausichecklib->getFalscheAnzahlAbschlusspruefungen(null, null, $params['prestudent_id']);
+
+		if (isError($checkRes)) return $checkRes;
+
+		if (hasData($checkRes))
+			return success(false); // not resolved if issue is still present
+		else
+			return success(true); // resolved otherwise
+	}
+}
@@ -0,0 +1,29 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * Incoming shouldn't have austrian home address.
+ */
+class CORE_STUDENTSTATUS_0010 implements IIssueResolvedChecker
+{
+	public function checkIfIssueIsResolved($params)
+	{
+		if (!isset($params['abschlusspruefung_id']) || !is_numeric($params['abschlusspruefung_id']))
+			return error('Prestudent Id missing, issue_id: '.$params['issue_id']);
+
+		$this->_ci =& get_instance(); // get code igniter instance
+
+		$this->_ci->load->library('issues/PlausicheckLib');
+
+		// check if issue persists
+		$checkRes = $this->_ci->plausichecklib->getDatumAbschlusspruefungFehlt(null, null, $params['abschlusspruefung_id']);
+
+		if (isError($checkRes)) return $checkRes;
+
+		if (hasData($checkRes))
+			return success(false); // not resolved if issue is still present
+		else
+			return success(true); // resolved otherwise
+	}
+}
@@ -0,0 +1,29 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * Incoming shouldn't have austrian home address.
+ */
+class CORE_STUDENTSTATUS_0011 implements IIssueResolvedChecker
+{
+	public function checkIfIssueIsResolved($params)
+	{
+		if (!isset($params['abschlusspruefung_id']) || !is_numeric($params['abschlusspruefung_id']))
+			return error('Prestudent Id missing, issue_id: '.$params['issue_id']);
+
+		$this->_ci =& get_instance(); // get code igniter instance
+
+		$this->_ci->load->library('issues/PlausicheckLib');
+
+		// check if issue persists
+		$checkRes = $this->_ci->plausichecklib->getDatumSponsionFehlt(null, null, $params['abschlusspruefung_id']);
+
+		if (isError($checkRes)) return $checkRes;
+
+		if (hasData($checkRes))
+			return success(false); // not resolved if issue is still present
+		else
+			return success(true); // resolved otherwise
+	}
+}
@@ -0,0 +1,32 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * Incoming shouldn't have austrian home address.
+ */
+class CORE_STUDENTSTATUS_0012 implements IIssueResolvedChecker
+{
+	public function checkIfIssueIsResolved($params)
+	{
+		if (!isset($params['prestudent_id']) || !is_numeric($params['prestudent_id']))
+			return error('Prestudent Id missing, issue_id: '.$params['issue_id']);
+
+		if (!isset($params['studiensemester_kurzbz']) || isEmptyString($params['studiensemester_kurzbz']))
+			return error('Studiensemester missing, issue_id: '.$params['issue_id']);
+
+		$this->_ci =& get_instance(); // get code igniter instance
+
+		$this->_ci->load->library('issues/PlausicheckLib');
+
+		// check if issue persists
+		$checkRes = $this->_ci->plausichecklib->getBewerberNichtZumRtAngetreten($params['studiensemester_kurzbz'], null, $params['prestudent_id']);
+
+		if (isError($checkRes)) return $checkRes;
+
+		if (hasData($checkRes))
+			return success(false); // not resolved if issue is still present
+		else
+			return success(true); // resolved otherwise
+	}
+}
@@ -0,0 +1,32 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * Incoming shouldn't have austrian home address.
+ */
+class CORE_STUDENTSTATUS_0013 implements IIssueResolvedChecker
+{
+	public function checkIfIssueIsResolved($params)
+	{
+		if (!isset($params['prestudent_id']) || !is_numeric($params['prestudent_id']))
+			return error('Prestudent Id missing, issue_id: '.$params['issue_id']);
+
+		if (!isset($params['studiensemester_kurzbz']) || isEmptyString($params['studiensemester_kurzbz']))
+			return error('Studiensemester missing, issue_id: '.$params['issue_id']);
+
+		$this->_ci =& get_instance(); // get code igniter instance
+
+		$this->_ci->load->library('issues/PlausicheckLib');
+
+		// check if issue persists
+		$checkRes = $this->_ci->plausichecklib->getAktSemesterNull($params['studiensemester_kurzbz'], null, $params['prestudent_id']);
+
+		if (isError($checkRes)) return $checkRes;
+
+		if (hasData($checkRes))
+			return success(false); // not resolved if issue is still present
+		else
+			return success(true); // resolved otherwise
+	}
+}
@@ -0,0 +1,29 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * Incoming shouldn't have austrian home address.
+ */
+class CORE_STUDENTSTATUS_0014 implements IIssueResolvedChecker
+{
+	public function checkIfIssueIsResolved($params)
+	{
+		if (!isset($params['prestudent_id']) || !is_numeric($params['prestudent_id']))
+			return error('Prestudent Id missing, issue_id: '.$params['issue_id']);
+
+		$this->_ci =& get_instance(); // get code igniter instance
+
+		$this->_ci->load->library('issues/PlausicheckLib');
+
+		// check if issue persists
+		$checkRes = $this->_ci->plausichecklib->getAbschlussstatusFehlt(null, null, $params['prestudent_id']);
+
+		if (isError($checkRes)) return $checkRes;
+
+		if (hasData($checkRes))
+			return success(false); // not resolved if issue is still present
+		else
+			return success(true); // resolved otherwise
+	}
+}
@@ -0,0 +1,36 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * Student with active status should have been charged, i.e. have a Kontobuchung with negative or zero value.
+ */
+class CORE_STUDENTSTATUS_0015 implements IIssueResolvedChecker
+{
+	public function checkIfIssueIsResolved($params)
+	{
+		if (!isset($params['prestudent_id']) || !is_numeric($params['prestudent_id']))
+			return error('Prestudent Id missing, issue_id: '.$params['issue_id']);
+
+		if (!isset($params['studiensemester_kurzbz']) || isEmptyString($params['studiensemester_kurzbz']))
+			return error('Studiensemester missing, issue_id: '.$params['issue_id']);
+
+		$this->_ci =& get_instance(); // get code igniter instance
+
+		$this->_ci->load->library('issues/PlausicheckLib');
+
+		// check if issue persists
+		$checkRes = $this->_ci->plausichecklib->getAktiverStudentstatusOhneKontobuchung(
+			$params['studiensemester_kurzbz'],
+			null,
+			$params['prestudent_id']
+		);
+
+		if (isError($checkRes)) return $checkRes;
+
+		if (hasData($checkRes))
+			return success(false); // not resolved if issue is still present
+		else
+			return success(true); // resolved otherwise
+	}
+}