prototype menu with traits

application/libraries/MenuBuilderLib.php

@@ -0,0 +1,243 @@
+<?php
+
+/**
+ * Copyright (C) 2026 fhcomplete.org
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+use \ReflectionMethod as ReflectionMethod;
+
+/**
+ * MenuBuilder library
+ * TODO(chris): docu
+ */
+class MenuBuilderLib
+{
+	protected $_ci;
+
+	protected $children = [];
+
+	/**
+	 * Constructor
+	 */
+	public function __construct()
+	{
+		// Get code igniter instance
+		$this->_ci =& get_instance();
+	}
+
+	/*private function registerTraits()
+	{
+		$class = $this;
+		$traits = [];
+
+		do {
+			$traits = array_merge(class_uses($class), $traits);
+		} while ($class = get_parent_class($class));
+
+		$config = $this->registerTraitsRecursive($traits);
+		$this->_ci->addMeta('test', $config);
+	}
+
+	private function registerTraitsRecursive($traits)
+	{
+		// TODO(chris): implement
+		$children = [];
+		foreach ($traits as $name => $trait) {
+			$traitId = ucfirst(str_replace("Trait", "", $name));
+			$initMethod = "init" . $traitId;
+			$this->_ci->addMeta('traits', $initMethod);
+			$child = $this->$initMethod();
+			if (!isset($child['alias']))
+				$child['alias'] = strtolower($traitId);
+			$children[$child['alias']] = $child;
+			$childTraits = class_uses($trait);
+			$children[$child['alias']]['children'] = $this->registerTraits($childTraits);
+		}
+		return $children;
+	}*/
+
+	// TODO(chris): abstract
+
+	final protected function getPathTemplate($path)
+	{
+		return implode('/', $path) . '/%s';
+	}
+
+	protected function getLinkTemplate($path, $vars)
+	{
+		return implode('/', $path) . '/%s';
+	}
+
+	protected function buildMenu()
+	{
+		return $this->buildMenuRecursive($this->children, [], []);
+	}
+
+	private function buildMenuRecursive($children, $identifiers, $path)
+	{
+		$result = [];
+
+		foreach ($children as $key => $segment) {
+			$node_config = $this->getNodeConfig($key, $segment);
+
+			$nodes = $this->buildNode($node_config, $segment, $identifiers, $path);
+
+			foreach ($nodes as $k => $node) {
+				// Convert stdClass to array
+				if (!is_array($node))
+					$node = get_object_vars($node);
+
+				// Render children
+				if (isset($node_config['children'])) {
+					$node_path = explode('/', $node['path']);
+					
+					$node_identifiers = $identifiers;
+					if (isset($node_config['identifiers'])) {
+						if (is_string($node_config['identifiers'])) {
+							$reflection = new ReflectionMethod($this, $node_config['identifiers']);
+							$num_segments = $reflection->getNumberOfParameters();
+							$parameters = array_slice($node_path, $num_segments * -1);
+							$node_identifiers = call_user_func_array([$this, $node_config['identifiers']], $parameters);
+							$node_identifiers = array_merge($identifiers, $node_identifiers);
+						} else {
+							if (count($node_path) < count($node_config['identifiers']))
+								return null; // NOTE(chris): wrong number of url segments
+
+							foreach ($node_config['identifiers'] as $index => $id_name) {
+								$pos = count($node_path) - count($node_config['identifiers']) + $index;
+								$node_identifiers[$id_name] = $node_path[$pos];
+							}
+						}
+					}
+
+					$node['children'] = $this->buildMenuRecursive($node_config['children'], $node_identifiers, $node_path);
+				} else {
+					$node['leaf'] = true;
+				}
+				$nodes[$k] = $node;
+			}
+
+			$result = array_merge($result, $nodes);
+		}
+
+		return $result;
+	}
+
+	final protected function getNodeConfig($key, $segment)
+	{
+		$traitname = is_int($key) ? $segment : $key;
+		$initFunc = 'init' . ucfirst($traitname);
+		
+		// TODO(chris): check identifiers string: single or function??
+
+		return $this->$initFunc();
+	}
+
+	private function buildNode($config, $segment, $identifiers, $path)
+	{// TODO(chris): why slash at beginning: "/inout"
+		if (isset($config['build'])) {
+			$buildFunc = $config['build'];
+			$path[] = $segment;
+			$pathTemplate = $this->getPathTemplate($path);
+			$linkTemplate = $this->getLinkTemplate($path, $identifiers);
+			return $this->$buildFunc($identifiers, $pathTemplate, $linkTemplate);
+		} else {
+			return $this->buildGenericItem($segment, $config, $identifiers, $path);
+		}
+	}
+
+	/**
+	 * @param array			$url_segments
+	 * @return array|null
+	 */
+	protected function buildSubmenu($url_segments)
+	{
+		$children = $this->children;
+		$original_path = $url_segments;
+
+		$segment = '';
+		$identifiers = [];
+		$config = [];
+
+		while(count($url_segments)) {
+			$segment = array_shift($url_segments);
+			$key = array_search($segment, $children);
+			if ($key === false)
+				return []; // NOTE(chris): node not found
+
+			$config = $this->getNodeConfig($key, $segment);
+
+			if (!isset($config['build']) && !isset($config['name']))
+				return null; // TODO(chris): invalid config
+			
+			if (isset($config['identifiers'])) {
+				if (is_string($config['identifiers'])) {
+					$reflection = new ReflectionMethod($this, $config['identifiers']);
+					$num_segments = $reflection->getNumberOfParameters();
+					$parameters = array_slice($url_segments, 0, $num_segments);
+					$url_segments = array_slice($url_segments, $num_segments);
+					$new_identifiers = call_user_func_array([$this, $config['identifiers']], $parameters);
+					$identifiers = array_merge($identifiers, $new_identifiers);
+				} else {
+					if (count($url_segments) < count($config['identifiers']))
+						return null; // NOTE(chris): wrong number of url segments
+
+					foreach ($config['identifiers'] as $id_name) {
+						$identifiers[$id_name] = array_shift($url_segments);
+					}
+				}
+			}
+
+			if (isset($config['children'])) {
+				$children = $config['children'];
+			} elseif (count($url_segments)) {
+				return null; // NOTE(chris): wrong number of url segments
+			} else {
+				return [];
+			}
+		}
+
+		$result = [];
+
+		foreach ($children as $key => $segment) {
+			$node_config = $this->getNodeConfig($key, $segment);
+			$nodes = $this->buildNode($node_config, $segment, $identifiers, $original_path);
+
+			$result = array_merge($result, $nodes);
+		}
+
+		return $result;
+	}
+
+	protected function buildGenericItem($segment, $config, $identifiers, $path)
+	{
+		$vars = isset($config['vars']) ? $config['vars'] : [];
+		
+		$vars = array_merge($identifiers, $vars);
+
+		$vars['name'] = $config['name'];
+
+		if (!isset($config['children']))
+			$vars['leaf'] = true;
+
+		$vars['path'] = sprintf($this->getPathTemplate($path), $segment);
+		$vars['link'] = sprintf($this->getLinkTemplate($path, $vars), $segment);
+		
+		return [ $vars ];
+	}
+}

application/libraries/menu/StvMenuLib.php

@@ -0,0 +1,89 @@
+<?php
+
+/**
+ * Copyright (C) 2026 fhcomplete.org
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+require_once(APPPATH . 'libraries/MenuBuilderLib.php');
+require_once(APPPATH . 'traits/menu/StgTrait.php');
+require_once(APPPATH . 'traits/menu/InoutTrait.php');
+
+use \ReflectionMethod as ReflectionMethod;
+
+/**
+ * StudVw Menu library
+ */
+class StvMenuLib extends MenuBuilderLib
+{
+	use StgTrait, InoutTrait;
+
+	protected $children = [
+		'stg',
+		'inout'
+	];
+
+	public function build($url_segments = [])
+	{
+		$result = $this->buildSubmenu($url_segments);
+
+		if ($result === null)
+			show_404();
+
+		return $result;
+	}
+	public function buildAll()
+	{
+		return $this->buildMenu();
+	}
+
+	protected function getLinkTemplate($path, $vars)
+	{
+		$result = '';
+
+		$children = $this->children;
+		while (count($path)) {
+			$segment = array_shift($path);
+			$key = array_search($segment, $children);
+			$config = $this->getNodeConfig($key, $segment);
+			if (isset($config['identifiers'])) {
+				if (is_array($config['identifiers'])) {
+					$count = count($config['identifiers']);
+				} else {
+					$reflection = new ReflectionMethod($this, $config['identifiers']);
+					$count = $reflection->getNumberOfParameters();
+				}
+				while ($count--) {
+					if (count($path))
+						$result .= array_shift($path) . '/';
+				}
+			} else {
+				$result .= $segment . '/';
+			}
+
+			if (isset($config['children']))
+				$children = $config['children'];
+			else
+				return [];
+		}
+
+		if (!strpos($result, '/prestudent') && !isset($vars['no_sem_reload']))
+			$result = 'CURRENT_SEMESTER/' . $result;
+
+		return $result . '%s';
+	}
+}

application/traits/menu/InoutTrait.php

@@ -0,0 +1,59 @@
+<?php
+
+/**
+ * Copyright (C) 2026 fhcomplete.org
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * 
+ */
+trait InoutTrait
+{
+	protected function initInout()
+	{
+		return [
+			'children' => [
+				'incoming',
+				'outgoing',
+				'SharedStudies' => 'shared_studies'
+			],
+			'name' => 'International' // TODO(chris): translate
+		];
+	}
+
+	protected function initIncoming()
+	{
+		return [
+			'name' => 'Incoming' // TODO(chris): translate
+		];
+	}
+
+	protected function initOutgoing()
+	{
+		return [
+			'name' => 'Outgoing' // TODO(chris): translate
+		];
+	}
+
+	protected function initSharedStudies()
+	{
+		return [
+			'name' => 'Gemeinsame Studien' // TODO(chris): translate
+		];
+	}
+}

application/traits/menu/Stg/OrgformTrait.php

@@ -0,0 +1,77 @@
+<?php
+
+/**
+ * Copyright (C) 2026 fhcomplete.org
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+require_once(APPPATH . 'traits/menu/Stg/PrestudentTrait.php');
+require_once(APPPATH . 'traits/menu/Stg/SemesterTrait.php');
+
+/**
+ * 
+ */
+trait OrgformTrait
+{
+	use PrestudentTrait, SemesterTrait;
+
+	protected function initOrgform()
+	{
+		return [
+			'children' => ['prestudent', 'semester'],
+			'identifiers' => ['orgform_kurzbz'],
+			'build' => 'getOrgform'
+		];
+	}
+
+	protected function getOrgform($vars, $pathTemplate, $linkTemplate)
+	{
+		// TODO(chris): permission on stg
+		// TODO(chris): check vars
+
+		$this->_ci->load->model('organisation/Studiengang_model', 'StudiengangModel');
+
+		// NOTE(chris): if mischform show orgforms
+		$result = $this->_ci->StudiengangModel->load($vars['studiengang_kz']);
+
+		if (!hasData($result))
+			return [];
+
+		$stg = current(getData($result));
+
+		if (!$stg->mischform)
+			return [];
+
+		$this->_ci->load->model('organisation/Studienordnung_model', 'StudienordnungModel');
+
+		$this->_ci->StudienordnungModel->addDistinct();
+		$this->_ci->StudienordnungModel->addSelect("FORMAT(" . $this->_ci->StudienordnungModel->escape($pathTemplate) . ", p.orgform_kurzbz) AS path");
+		$this->_ci->StudienordnungModel->addSelect("FORMAT(" . $this->_ci->StudienordnungModel->escape($linkTemplate) . ", p.orgform_kurzbz) AS link");
+		$this->_ci->StudienordnungModel->addSelect("p.orgform_kurzbz AS name");
+		$this->_ci->StudienordnungModel->addSelect("studiengang_kz AS stg_kz");
+
+		$this->_ci->StudienordnungModel->addJoin('lehre.tbl_studienplan p', 'studienordnung_id');
+
+		$result = $this->_ci->StudienordnungModel->loadWhere([
+			'aktiv' => true,
+			'studiengang_kz' => $vars['studiengang_kz'],
+			'p.orgform_kurzbz !=' => 'DDP'
+		]);
+
+		return getData($result) ?: [];
+	}
+}

application/traits/menu/Stg/Prestudent/Stdsem/StdsemFilterTrait.php

@@ -0,0 +1,144 @@
+<?php
+
+/**
+ * Copyright (C) 2026 fhcomplete.org
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * 
+ */
+trait StdsemFilterTrait
+{
+	protected function initInteressenten()
+	{
+		return [
+			'children' => [
+				'bewebungnichtabgeschickt',
+				'bewerbungabgeschickt',
+				'zgv',
+				'statusbestaetigt',
+				'reihungstestnichtangemeldet',
+				'reihungstestangemeldet'
+			],
+			'name' => 'Interessenten'
+		];
+	}
+
+	protected function initBewebungnichtabgeschickt()
+	{
+		return [ 'name' => 'Bewerbung nicht abgeschickt' ];
+	}
+
+	protected function initBewerbungabgeschickt()
+	{
+		return [ 'name' => 'Bewerbung abgeschickt, Status unbestätigt' ];
+	}
+
+	protected function initZgv()
+	{
+		return [ 'name' => 'ZGV erfüllt' ];
+	}
+
+	protected function initStatusbestaetigt()
+	{
+		return [
+			'children' => [
+				'statusbestaetigtrtnichtangemeldet',
+				'statusbestaetigtrtangemeldet'
+			],
+			'name' => 'Status bestätigt'
+		];
+	}
+
+	protected function initStatusbestaetigtrtnichtangemeldet()
+	{
+		return [ 'name' => 'Nicht zum Reihungstest angemeldet' ];
+	}
+
+	protected function initStatusbestaetigtrtangemeldet()
+	{
+		return [ 'name' => 'Reihungstest angemeldet' ];
+	}
+
+	protected function initReihungstestnichtangemeldet()
+	{
+		return [ 'name' => 'Nicht zum Reihungstest angemeldet' ];
+	}
+
+	protected function initReihungstestangemeldet()
+	{
+		return [ 'name' => 'Reihungstest angemeldet' ];
+	}
+
+	protected function initBewerber()
+	{
+		return [
+			'children' => [
+				'bewerberrtnichtangemeldet',
+				'bewerberrtangemeldet'
+			],
+			'name' => 'Bewerber'
+		];
+	}
+
+	protected function initBewerberrtnichtangemeldet()
+	{
+		return [ 'name' => 'Nicht zum Reihungstest angemeldet' ];
+	}
+
+	protected function initBewerberrtangemeldet()
+	{
+		return [
+			'children' => [
+				'bewerberrtangemeldetteilgenommen',
+				'bewerberrtangemeldetnichtteilgenommen'
+			],
+			'name' => 'Reihungstest angemeldet'
+		];
+	}
+
+	protected function initBewerberrtangemeldetteilgenommen()
+	{
+		return [ 'name' => 'Teilgenommen' ];
+	}
+
+	protected function initBewerberrtangemeldetnichtteilgenommen()
+	{
+		return [ 'name' => 'Nicht teilgenommen' ];
+	}
+
+	protected function initAufgenommen()
+	{
+		return [ 'name' => 'Aufgenommen' ];
+	}
+
+	protected function initWarteliste()
+	{
+		return [ 'name' => 'Warteliste' ];
+	}
+
+	protected function initAbsage()
+	{
+		return [ 'name' => 'Absage' ];
+	}
+
+	protected function initFilterIncoming()
+	{
+		return [ 'name' => 'Incoming' ];
+	}
+}

application/traits/menu/Stg/Prestudent/StdsemTrait.php

@@ -0,0 +1,83 @@
+<?php
+
+/**
+ * Copyright (C) 2026 fhcomplete.org
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+require_once(APPPATH . 'traits/menu/Stg/Prestudent/Stdsem/StdsemFilterTrait.php');
+
+/**
+ * 
+ */
+trait StdsemTrait
+{
+	use StdsemFilterTrait;
+
+	protected function initStdsem()
+	{
+		return [
+			'children' => [
+				'interessenten',
+				'bewerber',
+				'aufgenommen',
+				'warteliste',
+				'absage',
+				'filterIncoming' => 'incoming'
+			],
+			'identifiers' => ['studiensemester_kurzbz'],
+			'build' => 'getStdsem'
+		];
+	}
+
+	protected function getStdsem($vars, $pathTemplate, $linkTemplate)
+	{
+		// TODO(chris): permission on stg
+		// TODO(chris): check vars
+
+		$number_displayed_past_studiensemester = null;
+		
+		$this->_ci->load->model('system/Variable_model', 'VariableModel');
+		
+		$result = $this->_ci->VariableModel->getVariables(getAuthUID(), ['number_displayed_past_studiensemester']);
+		if (isError($result))
+			return [];
+
+		$data = getData($result);
+		if ($data && isset($data['number_displayed_past_studiensemester'])) {
+			$number_displayed_past_studiensemester = $data['number_displayed_past_studiensemester'];
+		} else {
+			$this->_ci->load->config('stv');
+			$number_displayed_past_studiensemester = $this->_ci->config->item('number_displayed_past_studiensemester_default');
+		}
+
+		$this->_ci->load->model('organisation/Studiensemester_model', 'StudiensemesterModel');
+
+		$this->_ci->StudiensemesterModel->addPlusMinus(null, $number_displayed_past_studiensemester);
+		
+		$this->_ci->StudiensemesterModel->addSelect("studiensemester_kurzbz AS name");
+		$this->_ci->StudiensemesterModel->addSelect("FORMAT(" . $this->_ci->StudiensemesterModel->escape($pathTemplate) . ", studiensemester_kurzbz) AS path", false);
+		$this->_ci->StudiensemesterModel->addSelect("FORMAT(" . $this->_ci->StudiensemesterModel->escape($linkTemplate) . ", studiensemester_kurzbz) AS link", false);
+		$this->_ci->StudiensemesterModel->addSelect($this->_ci->StudiensemesterModel->escape($vars['studiengang_kz']) . " AS stg_kz", false);
+		
+		$this->_ci->StudiensemesterModel->addOrder('ende');
+
+		$result = $this->_ci->StudiensemesterModel->load();
+
+		return getData($result) ?: [];
+	}
+}

application/traits/menu/Stg/PrestudentTrait.php

@@ -0,0 +1,43 @@
+<?php
+
+/**
+ * Copyright (C) 2026 fhcomplete.org
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+require_once(APPPATH . 'traits/menu/Stg/Prestudent/StdsemTrait.php');
+
+/**
+ * 
+ */
+trait PrestudentTrait
+{
+	use StdsemTrait;
+
+	protected function initPrestudent()
+	{
+		$name = 'Prestudent'; // TODO(chris): translate
+
+		return [
+			'children' => [ 'stdsem' ],
+			'name' => $name,
+			'vars' => [
+				'no_sem_reload' => true
+			]
+		];
+	}
+}

application/traits/menu/Stg/Semester/GroupTrait.php

@@ -0,0 +1,72 @@
+<?php
+
+/**
+ * Copyright (C) 2026 fhcomplete.org
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * 
+ */
+trait GroupTrait
+{
+	protected function initGroup()
+	{
+		return [
+			'identifiers' => ['gruppe_kurzbz'],
+			'build' => 'getGroup'
+		];
+	}
+
+	protected function getGroup($vars, $pathTemplate, $linkTemplate)
+	{
+		// TODO(chris): permission on stg
+		// TODO(chris): check vars
+
+		$this->_ci->load->model('organisation/Gruppe_model', 'GruppeModel');
+
+		$this->_ci->GruppeModel->addDistinct();
+		$this->_ci->GruppeModel->addSelect("FORMAT(" . $this->_ci->GruppeModel->escape($pathTemplate) . ", gruppe_kurzbz) AS path", false);
+		$this->_ci->GruppeModel->addSelect("FORMAT(" . $this->_ci->GruppeModel->escape($linkTemplate) . ", gruppe_kurzbz) AS link", false);
+		$this->_ci->GruppeModel->addSelect("CONCAT(gruppe_kurzbz, ' (', bezeichnung, ')') AS name", false);
+		$this->_ci->GruppeModel->addSelect("TRUE AS leaf", false);
+
+		$this->_ci->GruppeModel->addSelect('sort');
+		$this->_ci->GruppeModel->addSelect('gruppe_kurzbz');
+		$this->_ci->GruppeModel->addSelect($this->_ci->GruppeModel->escape($vars['studiengang_kz']) . '::integer AS stg_kz', false);
+		$this->_ci->GruppeModel->addSelect("ARRAY['link-strict', 'student-collection'] AS droplink");
+
+		$this->_ci->GruppeModel->addOrder('sort');
+		$this->_ci->GruppeModel->addOrder('gruppe_kurzbz');
+
+		$where = [
+			'studiengang_kz' => $vars['studiengang_kz'],
+			'semester' => $vars['semester'],
+			'lehre' => true,
+			'sichtbar' => true,
+			'aktiv' => true,
+			'direktinskription' => false
+		];
+
+		if (isset($vars['org_form']))
+			$where['orgform_kurzbz'] = $vars['org_form'];
+
+		$result = $this->_ci->GruppeModel->loadWhere($where);
+
+		return getData($result) ?: [];
+	}
+}

application/traits/menu/Stg/Semester/Verband/VerbandsGroupTrait.php

@@ -0,0 +1,73 @@
+<?php
+
+/**
+ * Copyright (C) 2026 fhcomplete.org
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+/**
+ * 
+ */
+trait VerbandsGroupTrait
+{
+	protected function initVerbandsGroup()
+	{
+		return [
+			'identifiers' => ['group'],
+			'build' => 'getVerbandsGroup'
+		];
+	}
+
+	protected function getVerbandsGroup($vars, $pathTemplate, $linkTemplate)
+	{
+		// TODO(chris): permission on stg
+		// TODO(chris): check vars
+
+		$this->_ci->load->model('organisation/Studiengang_model', 'StudiengangModel');
+
+		$this->_ci->StudiengangModel->addJoin('public.tbl_lehrverband v', 'studiengang_kz');
+		
+		$this->_ci->StudiengangModel->addDistinct();
+		$this->_ci->StudiengangModel->addSelect("FORMAT(" . $this->_ci->StudiengangModel->escape($pathTemplate) . ", gruppe) AS path", false);
+		$this->_ci->StudiengangModel->addSelect("FORMAT(" . $this->_ci->StudiengangModel->escape($linkTemplate) . ", gruppe) AS link", false);
+		$this->_ci->StudiengangModel->addSelect("CONCAT(UPPER(CONCAT(typ, kurzbz)), '-', semester, verband, gruppe, (SELECT CASE WHEN bezeichnung IS NULL OR bezeichnung='' THEN ''::TEXT ELSE CONCAT(' (', bezeichnung, ')') END FROM public.tbl_lehrverband WHERE studiengang_kz=v.studiengang_kz AND semester=v.semester AND verband=v.verband AND gruppe=v.gruppe ORDER BY gruppe LIMIT 1)) AS name", false);
+		$this->_ci->StudiengangModel->addSelect("TRUE AS leaf", false);
+
+		$this->_ci->StudiengangModel->addSelect('v.semester');
+		$this->_ci->StudiengangModel->addSelect('v.verband');
+		$this->_ci->StudiengangModel->addSelect('gruppe');
+		$this->_ci->StudiengangModel->addSelect($this->_ci->StudiengangModel->escape($vars['studiengang_kz']) . '::integer AS stg_kz', false);
+		$this->_ci->StudiengangModel->addSelect("ARRAY['link-strict', 'student-collection'] AS droplink");
+		
+		$this->_ci->StudiengangModel->addOrder('gruppe');
+
+		$where = [
+			'v.studiengang_kz' => $vars['studiengang_kz'],
+			'v.semester' => $vars['semester'],
+			'v.verband' => $vars['verband'],
+			'v.gruppe !=' => '',
+			'v.aktiv' => true
+		];
+
+		if (isset($vars['org_form']) && $vars['semester']) // NOTE(chris): on semester 0 show all?
+			$where['v.orgform_kurzbz'] = $vars['org_form'];
+
+		$result = $this->_ci->StudiengangModel->loadWhere($where);
+
+		return getData($result) ?: [];
+	}
+}

application/traits/menu/Stg/Semester/VerbandTrait.php

@@ -0,0 +1,77 @@
+<?php
+
+/**
+ * Copyright (C) 2026 fhcomplete.org
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+require_once(APPPATH . 'traits/menu/Stg/Semester/Verband/VerbandsGroupTrait.php');
+
+/**
+ * 
+ */
+trait VerbandTrait
+{
+	use VerbandsGroupTrait;
+
+	protected function initVerband()
+	{
+		return [
+			'children' => ['VerbandsGroup' => 'group'],
+			'identifiers' => ['verband'],
+			'build' => 'getVerband'
+		];
+	}
+
+	protected function getVerband($vars, $pathTemplate, $linkTemplate)
+	{
+		// TODO(chris): permission on stg
+		// TODO(chris): check vars
+
+		$this->_ci->load->model('organisation/Studiengang_model', 'StudiengangModel');
+		
+		$this->_ci->StudiengangModel->addJoin('public.tbl_lehrverband v', 'studiengang_kz');
+		
+		$this->_ci->StudiengangModel->addSelect("FORMAT(" . $this->_ci->StudiengangModel->escape($pathTemplate) . ", verband) AS path", false);
+		$this->_ci->StudiengangModel->addSelect("FORMAT(" . $this->_ci->StudiengangModel->escape($linkTemplate) . ", verband) AS link", false);
+		$this->_ci->StudiengangModel->addSelect("CONCAT(UPPER(CONCAT(typ, kurzbz)), '-', semester, verband, (SELECT CASE WHEN bezeichnung IS NULL OR bezeichnung='' THEN ''::TEXT ELSE CONCAT(' (', bezeichnung, ')') END FROM public.tbl_lehrverband WHERE studiengang_kz=v.studiengang_kz AND semester=v.semester AND verband=v.verband ORDER BY gruppe LIMIT 1)) AS name", false);
+		$this->_ci->StudiengangModel->addSelect("CASE WHEN MAX(gruppe)='' OR MAX(gruppe)=' ' THEN TRUE ELSE FALSE END AS leaf");
+
+		$this->_ci->StudiengangModel->addSelect($this->_ci->StudiengangModel->escape($vars['semester']) . ' AS semester');
+		$this->_ci->StudiengangModel->addSelect('verband');
+		$this->_ci->StudiengangModel->addSelect($this->_ci->StudiengangModel->escape($vars['studiengang_kz']) . '::integer AS stg_kz', false);
+		$this->_ci->StudiengangModel->addSelect("ARRAY['link-strict', 'student-collection'] AS droplink");
+		
+		$this->_ci->StudiengangModel->addOrder('verband');
+
+		$this->_ci->StudiengangModel->addGroupBy('path, link, name, verband');
+		
+		$where = [
+			'v.studiengang_kz' => $vars['studiengang_kz'],
+			'v.semester' => $vars['semester'],
+			'v.verband !=' => '',
+			'v.aktiv' => true
+		];
+
+		if (isset($vars['org_form']) && $vars['semester']) // NOTE(chris): on semester 0 show all?
+			$where['v.orgform_kurzbz'] = $vars['org_form'];
+
+		$result = $this->_ci->StudiengangModel->loadWhere($where);
+
+		return getData($result) ?: [];
+	}
+}

application/traits/menu/Stg/SemesterTrait.php

@@ -0,0 +1,86 @@
+<?php
+
+/**
+ * Copyright (C) 2026 fhcomplete.org
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+require_once(APPPATH . 'traits/menu/Stg/Semester/GroupTrait.php');
+require_once(APPPATH . 'traits/menu/Stg/Semester/VerbandTrait.php');
+
+/**
+ * 
+ */
+trait SemesterTrait
+{
+	use GroupTrait, VerbandTrait;
+
+	protected function initSemester()
+	{
+		return [
+			'children' => ['group', 'verband'],
+			'identifiers' => ['semester'],
+			'build' => 'getSemester'
+		];
+	}
+
+	protected function getSemester($vars, $pathTemplate, $linkTemplate)
+	{
+		// TODO(chris): permission on stg
+		// TODO(chris): check vars
+
+		$this->_ci->load->model('organisation/Studiengang_model', 'StudiengangModel');
+
+		$this->_ci->StudiengangModel->addJoin('public.tbl_lehrverband v', 'studiengang_kz');
+		
+		$this->_ci->StudiengangModel->addDistinct();
+		$this->_ci->StudiengangModel->addSelect("FORMAT(" . $this->_ci->StudiengangModel->escape($pathTemplate) . ", semester) AS path", false);
+		$this->_ci->StudiengangModel->addSelect("FORMAT(" . $this->_ci->StudiengangModel->escape($linkTemplate) . ", semester) AS link", false);
+		$this->_ci->StudiengangModel->addSelect("CONCAT(
+			UPPER(CONCAT(typ, kurzbz)), 
+			'-', 
+			semester, 
+			(
+				SELECT CASE WHEN bezeichnung IS NULL OR bezeichnung='' THEN ''::TEXT ELSE CONCAT(' (', bezeichnung, ')') END 
+				FROM public.tbl_lehrverband 
+				WHERE studiengang_kz=v.studiengang_kz AND semester=v.semester 
+				ORDER BY verband, gruppe LIMIT 1
+			)
+		) AS name", false);
+
+		$this->_ci->StudiengangModel->addSelect('semester');
+		$this->_ci->StudiengangModel->addSelect($this->_ci->StudiengangModel->escape($vars['studiengang_kz']) . '::integer AS stg_kz', false);
+		$this->_ci->StudiengangModel->addSelect("ARRAY['link-strict', 'student-collection'] AS droplink");
+		
+		$this->_ci->StudiengangModel->addOrder('semester');
+
+		if (isset($vars['org_form'])) {
+			$this->_ci->StudiengangModel->addSelect("v.orgform_kurzbz");
+			$this->_ci->StudiengangModel->db->group_start();
+			$this->_ci->StudiengangModel->db->where('v.semester', 0);
+			$this->_ci->StudiengangModel->db->or_where('v.orgform_kurzbz', $vars['org_form']);
+			$this->_ci->StudiengangModel->db->group_end();
+		}
+
+		$result = $this->_ci->StudiengangModel->loadWhere([
+			'v.studiengang_kz' => $vars['studiengang_kz'],
+			'v.aktiv' => true
+		]);
+
+		return getData($result) ?: [];
+	}
+}

application/traits/menu/StgTrait.php

@@ -0,0 +1,82 @@
+<?php
+
+/**
+ * Copyright (C) 2026 fhcomplete.org
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+require_once(APPPATH . 'traits/menu/Stg/PrestudentTrait.php');
+require_once(APPPATH . 'traits/menu/Stg/SemesterTrait.php');
+require_once(APPPATH . 'traits/menu/Stg/OrgformTrait.php');
+
+/**
+ * 
+ */
+trait StgTrait
+{
+	use OrgformTrait;
+
+	protected function initStg()
+	{
+		// TODO(chris): like this or with functions???
+		return [
+			// children as assoc array to rename them
+			'children' => ['prestudent', 'semester', 'orgform'],
+			#'identifiers' => 'getIdentifiersStg',
+			'identifiers' => ['studiengang_kz'],
+			'build' => 'getStg'
+		];
+	}
+
+	protected function getStg($vars, $pathTemplate, $linkTemplate)
+	{
+		$stgs = $this->_ci->permissionlib->getSTG_isEntitledFor('admin') ?: [];
+		$stgs = array_merge($stgs, $this->_ci->permissionlib->getSTG_isEntitledFor('assistenz') ?: []);
+
+		if (!$stgs)
+			return [];
+
+		$this->_ci->load->model('organisation/Studiengang_model', 'StudiengangModel');
+
+		$this->_ci->StudiengangModel->addJoin('public.tbl_lehrverband v', 'studiengang_kz');
+		
+		$this->_ci->StudiengangModel->addDistinct();
+		$this->_ci->StudiengangModel->addSelect("FORMAT(" . $this->_ci->StudiengangModel->escape($pathTemplate) . ", v.studiengang_kz) AS path");
+		$this->_ci->StudiengangModel->addSelect("FORMAT(" . $this->_ci->StudiengangModel->escape($linkTemplate) . ", v.studiengang_kz) AS link");
+		$this->_ci->StudiengangModel->addSelect(
+			"CONCAT(kurzbzlang, ' (', UPPER(CONCAT(typ, kurzbz)), ') - ', tbl_studiengang.bezeichnung) AS name",
+			false
+		);
+		$this->_ci->StudiengangModel->addSelect("studiengang_kz AS title");
+		$this->_ci->StudiengangModel->addSelect("studiengang_kz AS search");
+		$this->_ci->StudiengangModel->addSelect('erhalter_kz');
+		$this->_ci->StudiengangModel->addSelect('typ');
+		$this->_ci->StudiengangModel->addSelect('kurzbz');
+		$this->_ci->StudiengangModel->addSelect('studiengang_kz');
+		$this->_ci->StudiengangModel->addSelect('studiengang_kz AS stg_kz');
+		
+		$this->_ci->StudiengangModel->addOrder('erhalter_kz');
+		$this->_ci->StudiengangModel->addOrder('typ');
+		$this->_ci->StudiengangModel->addOrder('kurzbz');
+
+		$this->_ci->StudiengangModel->db->where_in('studiengang_kz', $stgs);
+
+		$result = $this->_ci->StudiengangModel->loadWhere(['v.aktiv' => true]);
+
+		return getData($result) ?: [];
+	}
+}