<?php

if (! defined('BASEPATH')) exit('No direct script access allowed');

/**
 * Shows infocenter-related data for a person and its prestudents, enables document and zgv checks,
 * displays and saves Notizen for a person, logs infocenter-related actions for a person
 */
class InfoCenter extends Auth_Controller
{
	// App and Verarbeitungstaetigkeit name for logging
	const APP = 'infocenter';
	const TAETIGKEIT = 'bewerbung';
	const FREIGABE_MAIL_VORLAGE = 'InfocenterMailFreigabeAssistenz';

	const INFOCENTER_URI = 'system/infocenter/InfoCenter'; // URL prefix for this controller
	const INDEX_PAGE = 'index';
	const FREIGEGEBEN_PAGE = 'freigegeben';
	const REIHUNGSTESTABSOLVIERT_PAGE = 'reihungstestAbsolviert';
	const SHOW_DETAILS_PAGE = 'showDetails';

	const NAVIGATION_PAGE = 'navigation_page';
	const ORIGIN_PAGE = 'origin_page';

	const FILTER_ID = 'filter_id';
	const PREV_FILTER_ID = 'prev_filter_id';
	const KEEP_TABLESORTER_FILTER = 'keepTsFilter';

	private $_uid; // contains the UID of the logged user

	// Used to log with PersonLogLib
	private $_logparams = array(
		'saveformalgep' => array(
			'logtype' => 'Action',
			'name' => 'Document formally checked',
			'message' => 'Document %s formally checked, set to %s',
			'success' => null
		),
		'savezgv' => array(
			'logtype' => 'Action',
			'name' => 'ZGV saved',
			'message' => 'ZGV saved for degree program %s, prestudentid %s',
			'success' => null
		),
		'abgewiesen' => array(
			'logtype' => 'Processstate',
			'name' => 'Interessent rejected',
			'message' => 'Interessent with prestudentid %s was rejected for degree program %s, reason: %s'
		),
		'freigegeben' => array(
			'logtype' => 'Processstate',
			'name' => 'Interessent confirmed',
			'message' => 'Status Interessent for prestudentid %s was confirmed for degree program %s%s'
		),
		'savenotiz' => array(
			'logtype' => 'Action',
			'name' => 'Note added',
			'message' => 'Note with title %s was added',
			'success' => null
		),
		'updatenotiz' => array(
			'logtype' => 'Action',
			'name' => 'Note updated',
			'message' => 'Note with title %s was updated',
			'success' => null
		)
	);

	// Name of Interessentenstatus
	const INTERESSENTSTATUS = 'Interessent';
	const ABGEWIESENERSTATUS = 'Abgewiesener';
	const BEWERBERSTATUS = 'Bewerber';

	// Statusgruende for which no Studiengangsfreigabemessage should be sent
	private $_statusgruendeNoStgFreigabeMessage = array('FIT Programm', 'FIT program', 'FIT programme');

	/**
	 * Constructor
	 */
	public function __construct()
    {
        parent::__construct(
			array(
				'index' => 'infocenter:r',
				'freigegeben' => 'infocenter:r',
				'reihungstestAbsolviert' => 'infocenter:r',
				'showDetails' => 'infocenter:r',
				'unlockPerson' => 'infocenter:rw',
				'saveFormalGeprueft' => 'infocenter:rw',
				'getPrestudentData' => 'infocenter:r',
				'getLastPrestudentWithZgvJson' => 'infocenter:r',
				'getZgvInfoForPrestudent' => 'infocenter:r',
				'saveBewPriorisierung' => 'infocenter:rw',
				'saveZgvPruefung' => 'infocenter:rw',
				'saveAbsage' => 'infocenter:rw',
				'saveFreigabe' => 'infocenter:rw',
				'getNotiz' => 'infocenter:r',
				'saveNotiz' => 'infocenter:rw',
				'updateNotiz' => 'infocenter:rw',
				'reloadZgvPruefungen' => 'infocenter:r',
				'reloadMessages' => 'infocenter:r',
				'reloadNotizen' => 'infocenter:r',
				'reloadLogs' => 'infocenter:r',
				'outputAkteContent' => 'infocenter:r',
				'getPostponeDate' => 'infocenter:r',
				'park' => 'infocenter:rw',
				'unpark' => 'infocenter:rw',
				'setOnHold' => 'infocenter:rw',
				'removeOnHold' => 'infocenter:rw',
				'getStudienjahrEnd' => 'infocenter:r',
				'setNavigationMenuArrayJson' => 'infocenter:r'
			)
		);

		// Loads models
		$this->load->model('crm/Akte_model', 'AkteModel');
		$this->load->model('crm/Prestudent_model', 'PrestudentModel');
		$this->load->model('crm/Prestudentstatus_model', 'PrestudentstatusModel');
		$this->load->model('crm/Statusgrund_model', 'StatusgrundModel');
		$this->load->model('person/Notiz_model', 'NotizModel');
		$this->load->model('person/Person_model', 'PersonModel');
		$this->load->model('system/Message_model', 'MessageModel');
		$this->load->model('system/Filters_model', 'FiltersModel');
		$this->load->model('system/PersonLock_model', 'PersonLockModel');

		// Loads libraries
		$this->load->library('PersonLogLib');
		$this->load->library('WidgetLib');

		$this->loadPhrases(
			array(
				'global',
				'person',
				'lehre',
				'ui',
				'infocenter',
				'filter'
			)
		);

		$this->_setAuthUID(); // sets property uid

		$this->load->library('VariableLib', array('uid' => $this->_uid));

		$this->setControllerId(); // sets the controller id
    }

	// -----------------------------------------------------------------------------------------------------------------
	// Public methods

	/**
	 * Main page of the InfoCenter tool
	 */
	public function index()
	{
		$this->_setNavigationMenuIndex(); // define the navigation menu for this page

		$this->load->view('system/infocenter/infocenter.php');
	}

	/**
	 * Freigegeben page of the InfoCenter tool
	 */
	public function freigegeben()
	{
		$this->_setNavigationMenu(self::FREIGEGEBEN_PAGE); // define the navigation menu for this page

		$this->load->view('system/infocenter/infocenterFreigegeben.php');
	}

	/**
	 *
	 */
	public function reihungstestAbsolviert()
	{
		$this->_setNavigationMenu(self::REIHUNGSTESTABSOLVIERT_PAGE); // define the navigation menu for this page

		$this->load->view('system/infocenter/infocenterReihungstestAbsolviert.php');
	}

	/**
	 * Personal details page of the InfoCenter tool
	 * Initialization function, gets person and prestudent data and loads the view with the data
	 */
	public function showDetails()
	{
		$this->_setNavigationMenuShowDetails();

		$person_id = $this->input->get('person_id');

		if (!is_numeric($person_id))
			show_error('person id is not numeric!');

		$personexists = $this->PersonModel->load($person_id);

		if (isError($personexists))
			show_error(getError($personexists));

		if (!hasData($personexists))
			show_error('Person does not exist!');

		$origin_page = $this->input->get(self::ORIGIN_PAGE);
		if ($origin_page == self::INDEX_PAGE)
		{
			// mark person as locked for editing
			$result = $this->PersonLockModel->lockPerson($person_id, $this->_uid, self::APP);

			if (isError($result)) show_error(getError($result));
		}

		$persondata = $this->_loadPersonData($person_id);
		$prestudentdata = $this->_loadPrestudentData($person_id);

		$data = array_merge(
			$persondata,
			$prestudentdata
		);

		$data[self::FHC_CONTROLLER_ID] = $this->getControllerId();
		$data[self::ORIGIN_PAGE] = $origin_page;
		$data[self::PREV_FILTER_ID] = $this->input->get(self::PREV_FILTER_ID);

		$this->load->view('system/infocenter/infocenterDetails.php', $data);
	}

	/**
	 * Unlocks page from edit by a person, redirects to overview filter page
	 * @param $person_id
	 */
	public function unlockPerson($person_id)
	{
		$result = $this->PersonLockModel->unlockPerson($person_id, self::APP);

		if (isError($result)) show_error(getError($result));

		$redirectLink = '/'.self::INFOCENTER_URI.'?'.self::FHC_CONTROLLER_ID.'='.$this->getControllerId();

		// Force reload of Dataset after Unlock
		$redirectLink .= '&'.self::KEEP_TABLESORTER_FILTER.'=true';

		$currentFilterId = $this->input->get(self::FILTER_ID);
		if (isset($currentFilterId))
		{
			$redirectLink .= '&'.self::FILTER_ID.'='.$currentFilterId;
		}

		redirect($redirectLink);
	}

	/**
	 * Saves if a document has been formal geprueft. Saves current timestamp if checked as geprueft, or null if not.
	 * @param $person_id
	 */
	public function saveFormalGeprueft($person_id)
	{
		$akte_id = $this->input->post('akte_id');
		$formalgeprueft = $this->input->post('formal_geprueft');

		$json = null;

		if (isset($akte_id) && isset($formalgeprueft) && isset($person_id))
		{
			$akte = $this->AkteModel->load($akte_id);

			if (hasData($akte))
			{
				$timestamp = ($formalgeprueft === 'true') ? date('Y-m-d H:i:s') : null;
				$result = $this->AkteModel->update($akte_id, array('formal_geprueft_amum' => $timestamp));

				if (isSuccess($result))
				{
					$json = is_null($timestamp) ? '' : $timestamp;

					$this->_log(
						$person_id,
						'saveformalgep',
						array(
							isEmptyString($akte->retval[0]->titel) ? $akte->retval[0]->bezeichnung : $akte->retval[0]->titel,
							is_null($timestamp) ? 'NULL' : $timestamp
						)
					);
				}
			}
		}

		$this->outputJsonSuccess(array($json));
	}

	/**
	 * Gets prestudent data for a person in json format
	 * @param $person_id
	 */
	public function getPrestudentData($person_id)
	{
		$prestudentdata = $this->_loadPrestudentData($person_id);

		$this->outputJsonSuccess($prestudentdata['zgvpruefungen']);
	}

	/**
	 * Gets prestudent that was last modified in json format, for ZGV übernehmen
	 * @param $person_id
	 */
	public function getLastPrestudentWithZgvJson($person_id)
	{
		$prestudent = $this->PrestudentModel->getLastPrestudent($person_id, true);

		$this->outputJson($prestudent);
	}

	/**
	 * Gets Zugangsvoraussetzungen for a prestudent as a description text and shows them in a view
	 * @param $prestudent_id
	 */
	public function getZgvInfoForPrestudent($prestudent_id)
	{
		$studienordnung = $this->PrestudentstatusModel->getStudienordnungWithZgvText($prestudent_id);

		$prestudentdata = $this->_getPersonAndStudiengangFromPrestudent($prestudent_id);
		$studiengangkurzbz = $prestudentdata['studiengang_kurzbz'];
		$studiengangbezeichnung = $prestudentdata['studiengang_bezeichnung'];

		$data = array(
			'studiengang_bezeichnung' => $studiengangbezeichnung,
			'studiengang_kurzbz' => $studiengangkurzbz,
			'data' => null
		);

		if (hasData($studienordnung))
		{
			$data['data'] = $studienordnung->retval[0]->data;
		}

		$this->load->view('system/infocenter/studiengangZgvInfo.php', $data);
	}

	/**
	 * Saves application priority for a prestudent
	 */
	public function saveBewPriorisierung()
	{
		$prestudent_id = $this->input->post('prestudentid');
		$change = $this->input->post('change');
		$json = false;

		if (is_numeric($change) || is_numeric($prestudent_id))
		{
			$json = $this->PrestudentModel->changePrio($prestudent_id, intval($change));
		}

		$this->outputJsonSuccess(array($json));
	}

	/**
	 * Saves a ZGV for a prestudent, includes Ort, Datum, Nation for bachelor and master
	 */
	public function saveZgvPruefung()
	{
		$json = null;

		$prestudent_id = $this->input->post('prestudentid');

		if (isEmptyString($prestudent_id))
			$json = error('Prestudentid missing');
		else
		{
			$ausbildungssemester = $this->input->post('ausbildungssemester');

			// zgvdata
			// Check for string null, in case dropdown changed to default value
			$zgv_code = $this->input->post('zgv') === 'null' ? null : $this->input->post('zgv');
			$zgvort = $this->input->post('zgvort');
			$zgvdatum = $this->input->post('zgvdatum');
			$zgvdatum = isEmptyString($zgvdatum) ? null : date_format(date_create($zgvdatum), 'Y-m-d');
			$zgvnation_code = $this->input->post('zgvnation') === 'null' ? null : $this->input->post('zgvnation');

			// zgvmasterdata
			$zgvmas_code = $this->input->post('zgvmas') === 'null' ? null : $this->input->post('zgvmas');
			$zgvmaort = $this->input->post('zgvmaort');
			$zgvmadatum = $this->input->post('zgvmadatum');
			$zgvmadatum = isEmptyString($zgvmadatum) ? null : date_format(date_create($zgvmadatum), 'Y-m-d');
			$zgvmanation_code = $this->input->post('zgvmanation') === 'null' ? null : $this->input->post('zgvmanation');

			$lastStatus = $this->PrestudentstatusModel->getLastStatus($prestudent_id, '', self::INTERESSENTSTATUS);

			$semresult = null;

			if (hasData($lastStatus))
			{
				$semresult = $this->PrestudentstatusModel->update(
					array('prestudent_id' => $lastStatus->retval[0]->prestudent_id,
						  'status_kurzbz' => $lastStatus->retval[0]->status_kurzbz,
						  'studiensemester_kurzbz' => $lastStatus->retval[0]->studiensemester_kurzbz),
					array('ausbildungssemester' => $ausbildungssemester)
				);
			}

			$prestresult = $this->PrestudentModel->update(
				$prestudent_id,
				array(
					'zgv_code' => $zgv_code,
					'zgvort' => $zgvort,
					'zgvdatum' => $zgvdatum,
					'zgvnation' => $zgvnation_code,
					'zgvmas_code' => $zgvmas_code,
					'zgvmaort' => $zgvmaort,
					'zgvmadatum' => $zgvmadatum,
					'zgvmanation' => $zgvmanation_code,
					'updateamum' => date('Y-m-d H:i:s')
				)
			);

			if (isError($prestresult))
				$json = error('Error when updating Prestudent!');
			elseif (isError($semresult))
				$json = error('Error when updating Ausbildungssemester!');
			else
				$json = success('Zgv saved successfully!');

			if (isSuccess($semresult) || isSuccess($prestresult))
			{
				//get extended Prestudent data for logging
				$logdata = $this->_getPersonAndStudiengangFromPrestudent($prestudent_id);

				$this->_log($logdata['person_id'], 'savezgv', array($logdata['studiengang_kurzbz'], $prestudent_id));
			}
		}

		$this->outputJson($json);
	}

	/**
	 * Saves Absage for Prestudent including the reason for the Absage (statusgrund).
	 * inserts Studiensemester and Ausbildungssemester for the new Absage of (chronologically) last status.
	 */
	public function saveAbsage()
	{
		$json = null;
		$prestudent_id = $this->input->post('prestudent_id');
		$statusgrund = $this->input->post('statusgrund');

		$lastStatus = $this->PrestudentstatusModel->getLastStatus($prestudent_id);

		$this->StatusgrundModel->addSelect('bezeichnung_mehrsprachig');
		$statusgrresult = $this->StatusgrundModel->load($statusgrund);

		if (hasData($lastStatus) && hasData($statusgrresult))
		{
			//check if still Interessent and not freigegeben yet
			if ($lastStatus->retval[0]->status_kurzbz === self::INTERESSENTSTATUS && !isset($lastStatus->retval[0]->bestaetigtam))
			{
				$result = $this->PrestudentstatusModel->insert(
					array(
						'prestudent_id' => $prestudent_id,
						'studiensemester_kurzbz' => $lastStatus->retval[0]->studiensemester_kurzbz,
						'ausbildungssemester' => $lastStatus->retval[0]->ausbildungssemester,
						'datum' => date('Y-m-d'),
						'orgform_kurzbz' => $lastStatus->retval[0]->orgform_kurzbz,
						'studienplan_id' => $lastStatus->retval[0]->studienplan_id,
						'status_kurzbz' => self::ABGEWIESENERSTATUS,
						'statusgrund_id' => $statusgrund,
						'insertvon' => $this->_uid,
						'insertamum' => date('Y-m-d H:i:s')
					)
				);

				$json = $result;
				if (isSuccess($result))
				{
					$logdata = $this->_getPersonAndStudiengangFromPrestudent($prestudent_id);

					//statusgrund bezeichnung for logging
					$statusgrund_bez = $statusgrresult->retval[0]->bezeichnung_mehrsprachig[1];

					$this->_log($logdata['person_id'], 'abgewiesen', array($prestudent_id, $logdata['studiengang_kurzbz'], $statusgrund_bez));
				}
			}
		}

		$this->outputJson($json);
	}

	/**
	 * Saves Freigabe of a Prestudent to the Studiengang.
	 * updates bestaetigtam and bestaetigtvon fields of the last status
	 */
	public function saveFreigabe()
	{
		$json = null;
		$prestudent_id = $this->input->post('prestudent_id');
		$statusgrund_id = $this->input->post('statusgrund_id');

		$lastStatus = $this->PrestudentstatusModel->getLastStatus($prestudent_id);

		$logdata = $this->_getPersonAndStudiengangFromPrestudent($prestudent_id);

		$person_id = $logdata['person_id'];

		$akteresult = $this->AkteModel->loadWhere(array('person_id' => $person_id, 'formal_geprueft_amum !=' => NULL));

		if (hasData($lastStatus) && isSuccess($akteresult))
		{
			$lastStatus = $lastStatus->retval[0];

			//check if still Interessent and not freigegeben yet
			if ($lastStatus->status_kurzbz === self::INTERESSENTSTATUS && !isset($lastStatus->bestaetigtam))
			{
				$statusdata = array(
					'bestaetigtvon' => $this->_uid,
					'bestaetigtam' => date('Y-m-d'),
					'updatevon' => $this->_uid,
					'updateamum' => date('Y-m-d H:i:s')
				);

				if (isset($statusgrund_id) && is_numeric($statusgrund_id))
				{
					$statusdata['statusgrund_id'] = $statusgrund_id;
				}

				$result = $this->PrestudentstatusModel->update(
					array(
						'prestudent_id' => $prestudent_id,
						'status_kurzbz' => $lastStatus->status_kurzbz,
						'studiensemester_kurzbz' => $lastStatus->studiensemester_kurzbz,
						'ausbildungssemester' => $lastStatus->ausbildungssemester
					),
					$statusdata
				);

				$json = $result;

				if (isSuccess($result))
				{
					$this->load->model('crm/Dokumentprestudent_model', 'DokumentprestudentModel');
					$json->retval['nonCriticalErrors'] = array();
					$json->retval['infoMessages'] = array();

					//set documents which have been formal geprüft to accepted
					$dokument_kurzbzs = array();

					foreach ($akteresult->retval as $akte)
					{
						$dokument_kurzbzs[] = $akte->dokument_kurzbz;
					}

					$acceptresult = $this->DokumentprestudentModel->setAcceptedDocuments($prestudent_id, $dokument_kurzbzs);

					// acceptresult returns null if no documents to accept
					if ($acceptresult !== null && isError($acceptresult))
						$json->retval['nonCriticalErrors'][] = 'error when accepting documents in FAS';

					$logparams = array($prestudent_id, $logdata['studiengang_kurzbz'], '');

					if (isset($statusgrund_id) && is_numeric($statusgrund_id))
					{
						$this->StatusgrundModel->addSelect('bezeichnung_mehrsprachig');
						$statusgrund_kurzbz = $this->StatusgrundModel->load($statusgrund_id);

						if (hasData($statusgrund_kurzbz))
							$logparams[2] = ', confirmation type '.$statusgrund_kurzbz->retval[0]->bezeichnung_mehrsprachig[0];
					}
					else
					{
						// check if there is already a Bewerberstatus and Reihungsverfahren already absolviert
						$bewerber = $this->PersonModel->hasBewerber($person_id, $lastStatus->studiensemester_kurzbz, 'b');

						if (hasData($bewerber))
						{
							$bewerbercnt = getData($bewerber);

							if (is_numeric($bewerbercnt[0]->anzahl_bewerber) && $bewerbercnt[0]->anzahl_bewerber > 0)
							{
								// then insert Bewerberstatus and rt absolviert, teilgenommen for prestudent
								$bewerberresult = $this->PrestudentstatusModel->insert(
									array(
										'prestudent_id' => $prestudent_id,
										'status_kurzbz' => self::BEWERBERSTATUS,
										'studiensemester_kurzbz' => $lastStatus->studiensemester_kurzbz,
										'ausbildungssemester' => $lastStatus->ausbildungssemester,
										'datum' => date('Y-m-d'),
										'orgform_kurzbz' => $lastStatus->orgform_kurzbz,
										'studienplan_id' => $lastStatus->studienplan_id,
										'insertvon' => $this->_uid,
										'insertamum' => date('Y-m-d H:i:s')
									)
								);

								if (isError($bewerberresult))
									$json->retval['nonCriticalErrors'][] = 'error when inserting Bewerberstatus';

								$rtangetretenres = $this->PrestudentModel->update(
									$prestudent_id,
									array(
										'reihungstestangetreten' => true
									)
								);

								if (isError($rtangetretenres))
								{
									$json->retval['nonCriticalErrors'][] = 'error when setting reihungstestangetreten';
								}
								else
								{
									$json->retval['infoMessages'][] = $this->p->t('infocenter', 'rtPunkteEintragenInfo');
									$this->load->model('crm/RtPerson_model', 'RtPersonModel');

									$rtteilgenommenres = $this->RtPersonModel->update(
										array(
											'person_id' => $person_id,
											'studienplan_id' => $lastStatus->studienplan_id
										),
										array(
											'teilgenommen' => true
										)
									);

									if (isError($rtteilgenommenres))
										$json->retval['nonCriticalErrors'][] = 'error when setting reihungstest teilgenommen';
								}
							}
						}
					}

					$this->_log($person_id, 'freigegeben', $logparams);

					$this->_sendFreigabeMail($prestudent_id);
				}
			}
		}

		$this->outputJson($json);
	}

	/**
	 * Gets a Notiz
	 */
	public function getNotiz()
	{
		$notiz_id = $this->input->get('notiz_id');

		$result = $this->NotizModel->load(
			$notiz_id
		);

		$this->outputJson($result);
	}

	/**
	 * Saves a new Notiz for a person
	 * @param $person_id
	 */
	public function saveNotiz($person_id)
	{
		$titel = $this->input->post('notiztitel');
		$text = $this->input->post('notiz');
		$erledigt = false;

		$result = $this->NotizModel->addNotizForPerson($person_id, $titel, $text, $erledigt, $this->_uid);

		if (isSuccess($result))
		{
			$this->_log($person_id, 'savenotiz', array($titel));
		}

		$this->outputJson($result);
	}

	/**
	 * Updates a new Notiz for a person
	 * @param int $notiz_id
	 */
	public function updateNotiz($notiz_id)
	{
		$person_id = $this->input->post('person_id');
		$titel = $this->input->post('notiztitel');
		$text = $this->input->post('notiz');

		$result = $this->NotizModel->update(
			$notiz_id,
			array(
				'titel' => $titel,
				'text' => $text,
				'verfasser_uid' => $this->_uid,
				"updateamum" => 'NOW()',
				"updatevon" => $this->_uid
			)
		);

		if (isSuccess($result))
		{
			//set log "Notiz updated"
			$this->_log($person_id, 'updatenotiz', array($titel));
		}

		$this->outputJson($result);
	}

	/**
	 * Loads Zgv Prüfung view for a person, helper for reloading after ajax request
	 * @param $person_id
	 */
	public function reloadZgvPruefungen($person_id)
	{
		$prestudentdata = $this->_loadPrestudentData($person_id);

		$prestudentdata[self::FHC_CONTROLLER_ID] = $this->getControllerId();

		$this->load->view('system/infocenter/zgvpruefungen.php', $prestudentdata);
	}

	/**
	 * Loads Messages view for a person, helper for reloading after ajax request
	 * @param $person_id
	 */
	public function reloadMessages($person_id)
	{
		$messages = $this->MessageModel->getMessagesOfPerson($person_id, 1);
		$this->load->view('system/infocenter/messageList.php', array('messages' => $messages->retval));
	}

	/**
	 * Loads Notizen view for a person, helper for reloading after ajax request
	 * @param $person_id
	 */
	public function reloadNotizen($person_id)
	{
		$notizen = $this->NotizModel->getNotiz($person_id);

		if (isError($notizen))
		{
			show_error(getError($notizen));
		}

		$this->load->view('system/infocenter/notizen.php', array('notizen' => $notizen->retval));
	}

	/**
	 * Loads Logs view for a person, helper for reloading after ajax request
	 * @param $person_id
	 */
	public function reloadLogs($person_id)
	{
		$logs = $this->personloglib->getLogs($person_id);
		$this->load->view('system/infocenter/logs.php', array('logs' => $logs));
	}

	/**
	 * Outputs content of an Akte, sends appropriate headers (so the document can be downloaded)
	 * @param $akte_id
	 */
	public function outputAkteContent($akte_id)
	{
		$this->load->library('DmsLib');

		$akte = $this->AkteModel->load($akte_id);

		if (isError($akte))
		{
			show_error(getError($akte));
		}

		$aktecontent = $this->dmslib->getAkteContent($akte_id);

		if (isError($aktecontent))
		{
			show_error(getError($aktecontent));
		}

		$this->output
			->set_status_header(200)
			->set_content_type($akte->retval[0]->mimetype, 'utf-8')
			->set_header('Content-Disposition: attachment; filename="'.$akte->retval[0]->titel.'"')
			->set_output($aktecontent->retval)
			->_display();
	}

	/**
	 * Gets the date until which a person is parked
	 * @param $person_id
	 */
	public function getPostponeDate($person_id)
	{
		$result = array(
			'type' => null,
			'date' => null
		);

		$parkedDate = $this->personloglib->getParkedDate($person_id);

		if (isset($parkedDate))
		{
			$result['type'] = 'parked';
			$result['date'] = $parkedDate;
		}
		else
		{
			$onholdDate = $this->personloglib->getOnHoldDate($person_id);

			if (isset($onholdDate))
			{
				$result['type'] = 'onhold';
				$result['date'] = $onholdDate;
			}
		}

		$this->outputJsonSuccess($result);
	}

	/**
	 * Initializes parking of a person, i.e. a person is not expected to do any actions while parked
	 */
	public function park()
	{
		$person_id = $this->input->post('person_id');
		$date = $this->input->post('parkdate');

		$result = $this->personloglib->park($person_id, date_format(date_create($date), 'Y-m-d'), self::TAETIGKEIT, self::APP, null, $this->_uid);

		$this->outputJson($result);
	}

	/**
	 * Removes parking of a person
	 */
	public function unPark()
	{
		$person_id = $this->input->post('person_id');

		$result = $this->personloglib->unPark($person_id);

		$this->outputJson($result);
	}

	/**
	 * Sets a person on hold ("zurückstellen")
	 */
	public function setOnHold()
	{
		$person_id = $this->input->post('person_id');
		$date = $this->input->post('onholddate');

		$result = $this->personloglib->setOnHold($person_id, date_format(date_create($date), 'Y-m-d'), self::TAETIGKEIT, self::APP, null, $this->_uid);

		$this->outputJson($result);
	}

	/**
	 * Removed on hold status of a person
	 */
	public function removeOnHold()
	{
		$person_id = $this->input->post('person_id');

		$result = $this->personloglib->removeOnHold($person_id);

		$this->outputJson($result);
	}

	/**
	 * Gets the End date of the current Studienjahr
	 */
	public function getStudienjahrEnd()
	{
		$this->load->model('organisation/studienjahr_model', 'StudienjahrModel');

		$result = $this->StudienjahrModel->getCurrStudienjahr();

		$json = null;

		if (hasData($result))
		{
			$json = $result->retval[0]->ende;
		}

		$this->outputJsonSuccess(array($json));
	}

	/**
	 * Wrapper for setNavigationMenu, returns JSON message
	 */
	public function setNavigationMenuArrayJson()
	{
		$navigation_page = $this->input->get(self::NAVIGATION_PAGE);

		if (strpos($navigation_page, self::INDEX_PAGE) !== false)
		{
			$this->_setNavigationMenuIndex();
		}
		elseif (strpos($navigation_page, self::FREIGEGEBEN_PAGE) !== false)
		{
			$this->_setNavigationMenu(self::FREIGEGEBEN_PAGE);
		}
		elseif (strpos($navigation_page, self::REIHUNGSTESTABSOLVIERT_PAGE) !== false)
		{
			$this->_setNavigationMenu(self::REIHUNGSTESTABSOLVIERT_PAGE);
		}

		$this->outputJsonSuccess('success');
	}

	// -----------------------------------------------------------------------------------------------------------------
	// Private methods

	/**
	 * Retrieve the UID of the logged user and checks if it is valid
	 */
	private function _setAuthUID()
	{
		$this->_uid = getAuthUID();

		if (!$this->_uid) show_error('User authentification failed');
	}

	/**
	 *  Define the navigation menu for the index page
	 */
	private function _setNavigationMenuIndex()
	{
		$this->load->library('NavigationLib', array(self::NAVIGATION_PAGE => self::INFOCENTER_URI.'/'.self::INDEX_PAGE));

		$listFiltersSent = array();
		$listFiltersNotSent = array();
		$listCustomFilters = array();

		$filtersSent = $this->FiltersModel->getFilterList('infocenter', 'overview', '%InfoCenterSentApplication%');
		if (hasData($filtersSent))
		{
			for ($filtersCounter = 0; $filtersCounter < count($filtersSent->retval); $filtersCounter++)
			{
				$filter = $filtersSent->retval[$filtersCounter];

				$listFiltersSent[$filter->filter_id] = $filter->description[0];
			}
		}

		$filtersNotSent = $this->FiltersModel->getFilterList('infocenter', 'overview', '%InfoCenterNotSentApplication%');
		if (hasData($filtersNotSent))
		{
			for ($filtersCounter = 0; $filtersCounter < count($filtersNotSent->retval); $filtersCounter++)
			{
				$filter = $filtersNotSent->retval[$filtersCounter];

				$listFiltersNotSent[$filter->filter_id] = $filter->description[0];
			}
		}

		$customFilters = $this->FiltersModel->getCustomFiltersList('infocenter', 'overview', $this->_uid);
		if (hasData($customFilters))
		{
			for ($filtersCounter = 0; $filtersCounter < count($customFilters->retval); $filtersCounter++)
			{
				$filter = $customFilters->retval[$filtersCounter];

				$listCustomFilters[$filter->filter_id] = $filter->description[0];
			}
		}

		$filtersArray = array();

		$filtersArray['abgeschickt'] = $this->navigationlib->oneLevel(
			ucfirst($this->p->t('global', 'abgeschickt')), 	// description
			'#',											// link
			array(),										// children
			'',												// icon
			true,											// expand
			null, 											// subscriptDescription
			null, 											// subscriptLinkClass
			null, 											// subscriptLinkValue
			'', 											// target
			1 												// sort
		);

		$filtersArray['nichtabgeschickt'] = $this->navigationlib->oneLevel(
			ucfirst($this->p->t('global', 'nichtAbgeschickt')),	// description
			'#',												// link
			array(),											// children
			'',													// icon
			true,												// expand
			null, 											// subscriptDescription
			null, 											// subscriptLinkClass
			null, 											// subscriptLinkValue
			'', 											// target
			2 												// sort
		);

		$this->_fillFilters($listFiltersSent, $filtersArray['abgeschickt']);
		$this->_fillFilters($listFiltersNotSent, $filtersArray['nichtabgeschickt']);

		if (count($listCustomFilters) > 0)
		{
			$filtersArray['personal'] = $this->navigationlib->oneLevel(
				'Personal filters',	// description
				'#',				// link
				array(),			// children
				'',					// icon
				true,				// expand
				null, 											// subscriptDescription
				null, 											// subscriptLinkClass
				null, 											// subscriptLinkValue
				'', 											// target
				3 												// sort
			);

			$this->_fillCustomFilters($listCustomFilters, $filtersArray['personal']);
		}

		$freigegebenLink = site_url(self::INFOCENTER_URI.'/'.self::FREIGEGEBEN_PAGE);
		$reihungstestAbsolviertLink = site_url(self::INFOCENTER_URI.'/'.self::REIHUNGSTESTABSOLVIERT_PAGE);

		$currentFilterId = $this->input->get(self::FILTER_ID);
		if (isset($currentFilterId))
		{
			$freigegebenLink .= '?'.self::PREV_FILTER_ID.'='.$currentFilterId;
			$reihungstestAbsolviertLink .= '?'.self::PREV_FILTER_ID.'='.$currentFilterId;
		}

		$this->navigationlib->setSessionMenu(
			array('filters' => $this->navigationlib->oneLevel(
					'Filters',		// description
					'#',			// link
					$filtersArray,	// children
					'filter',				// icon
					true,			// expand
					null,			// subscriptDescription
					null,			// subscriptLinkClass
					null, 			// subscriptLinkValue
					'', 			// target
					1 				// sort
				),
				'freigegeben' => $this->navigationlib->oneLevel(
					'zum RT freigegeben',		// description
					$freigegebenLink,	// link
					null,				// children
					'thumbs-up',		// icon
					null,				// subscriptDescription
					false,				// expand
					null,				// subscriptLinkClass
					null, 				// subscriptLinkValue
					'', 				// target
					10   				// sort
				),
				'reihungstestAbsolviert' => $this->navigationlib->oneLevel(
					'Reihungstest absolviert',		// description
					$reihungstestAbsolviertLink,				// link
					null,				// children
					'check',					// icon
					null,				// subscriptDescription
					false,				// expand
					null,				// subscriptLinkClass
					null, 				// subscriptLinkValue
					'', 				// target
					20   				// sort
				)
			)
		);
	}

	/**
	 *  Define the navigation menu for the showDetails page
	 */
	private function _setNavigationMenuShowDetails()
	{
		$this->load->library('NavigationLib', array(self::NAVIGATION_PAGE => self::INFOCENTER_URI.'/'.self::SHOW_DETAILS_PAGE));

		$origin_page = $this->input->get(self::ORIGIN_PAGE);

		$link = site_url(self::INFOCENTER_URI);
		if ($origin_page == self::FREIGEGEBEN_PAGE)
		{
			$link = site_url(self::INFOCENTER_URI.'/'.self::FREIGEGEBEN_PAGE);
		}
		if ($origin_page == self::REIHUNGSTESTABSOLVIERT_PAGE)
		{
			$link = site_url(self::INFOCENTER_URI.'/'.self::REIHUNGSTESTABSOLVIERT_PAGE);
		}

		$prevFilterId = $this->input->get(self::PREV_FILTER_ID);
		if (isset($prevFilterId))
		{
			$link .= '?'.self::FILTER_ID.'='.$prevFilterId.'&'.self::KEEP_TABLESORTER_FILTER.'=true';
		}

		$this->navigationlib->setSessionMenu(
			array(
				'back' => $this->navigationlib->oneLevel(
					'Zurück',		// description
					$link,			// link
					null,			// children
					'angle-left',	// icon
					true,			// expand
					null, 			// subscriptDescription
					null, 			// subscriptLinkClass
					null, 			// subscriptLinkValue
					'', 			// target
					1 				// sort
				)
			)
		);
	}

	/**
	 *  Define the navigation menu for the freigegeben page
	 */
	private function _setNavigationMenu($page)
	{
		// Loads NavigationLib
		$this->load->library('NavigationLib', array(self::NAVIGATION_PAGE => self::INFOCENTER_URI.'/'.$page));

		// Generate the home link with the eventually loaded filter
		$homeLink = site_url(self::INFOCENTER_URI.'/'.self::INDEX_PAGE);
		$freigegebenLink = site_url(self::INFOCENTER_URI.'/'.self::FREIGEGEBEN_PAGE);
		$absolviertLink = site_url(self::INFOCENTER_URI.'/'.self::REIHUNGSTESTABSOLVIERT_PAGE);
		$prevFilterId = $this->input->get(self::PREV_FILTER_ID);
		if (isset($prevFilterId))
		{
			$homeLink .= '?'.self::FILTER_ID.'='.$prevFilterId;
		}

		$this->navigationlib->setSessionElementMenu(
			'uebersicht',
			$this->navigationlib->oneLevel(
				'Infocenter Übersicht',		// description
				$homeLink,			// link
				null,				// children
				'info',				// icon
				null,				// subscriptDescription
				false,				// expand
				null,				// subscriptLinkClass
				null, 				// subscriptLinkValue
				'', 				// target
				20   				// sort
			)
		);

		if($page == self::REIHUNGSTESTABSOLVIERT_PAGE)
		{
			$this->navigationlib->setSessionElementMenu(
				'freigegeben',
				$this->navigationlib->oneLevel(
					'zum RT freigegeben',		// description
					$freigegebenLink,	// link
					null,				// children
					'thumbs-up',		// icon
					null,				// subscriptDescription
					false,				// expand
					null,				// subscriptLinkClass
					null, 				// subscriptLinkValue
					'', 				// target
					30   				// sort
				)
			);
		}
		if($page == self::FREIGEGEBEN_PAGE)
		{
			$this->navigationlib->setSessionElementMenu(
				'reihungstestAbsolviert',
				$this->navigationlib->oneLevel(
					'Reihungstest absolviert',		// description
					$absolviertLink,	// link
					null,				// children
					'check',			// icon
					null,				// subscriptDescription
					false,				// expand
					null,				// subscriptLinkClass
					null, 				// subscriptLinkValue
					'', 				// target
					30   				// sort
				)
			);
		}
	}

	/**
	 * Utility method used to fill elements of the InfoCenter left menu of the main InfoCenter page
	 */
	private function _fillFilters($filters, &$toFill)
	{
		foreach ($filters as $filterId => $description)
		{
			$toFill['children'][] = $this->navigationlib->oneLevel(
				$description,				// description
				sprintf(
					'%s?%s=%s',
					site_url(self::INFOCENTER_URI),
					self::FILTER_ID,
					$filterId
				)							// link
			);
		}
	}

	/**
	 * Utility method used to fill elements of the InfoCenter left menu
	 * with the list of the custom filter of the authenticated user
	 */
	private function _fillCustomFilters($filters, &$toFill)
	{
		foreach ($filters as $filterId => $description)
		{
			$toFill['children'][] = $this->navigationlib->oneLevel(
				$description,				// description
				sprintf(
					'%s?%s=%s',
					site_url(self::INFOCENTER_URI),
					self::FILTER_ID,
					$filterId
				),							// link
				null,						// children
				'',							// icon
				false,						// expand
				'Remove',					// subscriptDescription
				'remove-custom-filter',		// subscriptLinkClass
				$filterId,					// subscriptLinkValue
				null,						// sort
				null						// requiredPermissions
			);
		}
	}

	/**
	 * Loads all necessary Person data: Stammdaten (name, svnr, contact, ...), Dokumente, Logs and Notizen
	 * @param $person_id
	 * @return array
	 */
	private function _loadPersonData($person_id)
	{
		$locked = $this->PersonLockModel->checkIfLocked($person_id, self::APP);

		if (isError($locked))
		{
			show_error(getError($locked));
		}

		$lockedby = null;

		//mark red if locked by other user
		$lockedbyother = false;

		if (isset($locked->retval[0]->uid))
		{
			$lockedby = $locked->retval[0]->uid;
			if ($lockedby !== $this->_uid)
				$lockedbyother = true;
		}

		$stammdaten = $this->PersonModel->getPersonStammdaten($person_id, true);

		if (isError($stammdaten))
		{
			show_error(getError($stammdaten));
		}

		if (!isset($stammdaten->retval))
			return null;

		$dokumente = $this->AkteModel->getAktenWithDokInfo($person_id, null, false);

		if (isError($dokumente))
		{
			show_error(getError($dokumente));
		}

		$dokumente_nachgereicht = $this->AkteModel->getAktenWithDokInfo($person_id, null, true);

		if (isError($dokumente_nachgereicht))
		{
			show_error(getError($dokumente_nachgereicht));
		}

		$messages = $this->MessageModel->getMessagesOfPerson($person_id, 1);

		if (isError($messages))
		{
			show_error(getError($messages));
		}

		$logs = $this->personloglib->getLogs($person_id);

		$notizen = $this->NotizModel->getNotiz($person_id);

		if (isError($notizen))
		{
			show_error(getError($notizen));
		}

		$notizen_bewerbung = $this->NotizModel->getNotizByTitel($person_id, 'Anmerkung zur Bewerbung%');

		if (isError($notizen_bewerbung))
		{
			show_error(getError($notizen_bewerbung));
		}

		$user_person = $this->PersonModel->getByUid($this->_uid);

		if (isError($user_person))
		{
			show_error(getError($user_person));
		}

		$data = array (
			'lockedby' => $lockedby,
			'lockedbyother' => $lockedbyother,
			'stammdaten' => $stammdaten->retval,
			'dokumente' => $dokumente->retval,
			'dokumente_nachgereicht' => $dokumente_nachgereicht->retval,
			'messages' => $messages->retval,
			'logs' => $logs,
			'notizen' => $notizen->retval,
			'notizenbewerbung' => $notizen_bewerbung->retval
		);

		return $data;
	}

	/**
	 * Loads all necessary Prestudent data: Zgv data, Statusgruende
	 * @param $person_id
	 * @return array
	 */
	private function _loadPrestudentData($person_id)
	{
		$zgvpruefungen = array();

		$prestudenten = $this->PrestudentModel->loadWhere(array('person_id' => $person_id));

		if (isError($prestudenten))
		{
			show_error(getError($prestudenten));
		}

		foreach ($prestudenten->retval as $prestudent)
		{
			$prestudentWithZgv = $this->PrestudentModel->getPrestudentWithZgv($prestudent->prestudent_id);

			if (isError($prestudentWithZgv))
			{
				show_error(getError($prestudentWithZgv));
			}

			$zgvpruefung = getData($prestudentWithZgv);

			if (isset($zgvpruefung->prestudentstatus))
			{
				//get orgform for german and english
				if (isset($zgvpruefung->prestudentstatus->bezeichnung_orgform) && is_array($zgvpruefung->prestudentstatus->bezeichnung_orgform))
				{
					$zgvpruefung->prestudentstatus->bezeichnung_orgform_german = getPhraseByLanguage($zgvpruefung->prestudentstatus->bezeichnung_orgform, 'German');
					$zgvpruefung->prestudentstatus->bezeichnung_orgform_english = getPhraseByLanguage($zgvpruefung->prestudentstatus->bezeichnung_orgform, 'English');
				}

				$position = strpos($zgvpruefung->prestudentstatus->anmerkung, 'Alt:');

				//parse Anmerkung for Alternative (Prio is given in orgform and sprache anyway)
				$zgvpruefung->prestudentstatus->alternative = is_numeric($position) ? substr($zgvpruefung->prestudentstatus->anmerkung, $position) : null;
			}
			//if prestudent is not interessent or is already bestaetigt, then show only as information, non-editable
			$zgvpruefung->infoonly = !isset($zgvpruefung->prestudentstatus)
				|| isset($zgvpruefung->prestudentstatus->bestaetigtam)
				|| $zgvpruefung->prestudentstatus->status_kurzbz != self::INTERESSENTSTATUS;

			//wether prestudent was freigegeben for RT/Stg
			$zgvpruefung->isRtFreigegeben = false;
			$zgvpruefung->isStgFreigegeben = false;
			$zgvpruefung->sendStgFreigabeMsg = true;//wether Stgudiengangfreigabemessage can be sent (for "exceptions", Studiengänge with no message sending)

			$isFreigegeben = null;
			if (isset($zgvpruefung->prestudentstatus->studiensemester_kurzbz))
			{
				$this->PrestudentstatusModel->addSelect('bestaetigtam, statusgrund_id, tbl_status_grund.bezeichnung_mehrsprachig AS bezeichnung_statusgrund');
				$this->PrestudentstatusModel->addJoin('public.tbl_status_grund', 'statusgrund_id', 'LEFT');
				$isFreigegeben = $this->PrestudentstatusModel->loadWhere(array('studiensemester_kurzbz' => $zgvpruefung->prestudentstatus->studiensemester_kurzbz,
															  'tbl_prestudentstatus.status_kurzbz' => self::INTERESSENTSTATUS, 'prestudent_id' => $prestudent->prestudent_id));
			}

			if (hasData($isFreigegeben))
			{
				foreach ($isFreigegeben->retval as $prestudentstatus)
				{
					if (isset($prestudentstatus->bestaetigtam))
					{
						//if statusgrund set - freigegeben for Studiengang, otherwise freigegeben for RT
						if (isset($prestudentstatus->statusgrund_id))
						{
							if (isset($prestudentstatus->bezeichnung_statusgrund[0])
								&& in_array($prestudentstatus->bezeichnung_statusgrund[0], $this->_statusgruendeNoStgFreigabeMessage))
								$zgvpruefung->sendStgFreigabeMsg = false;
							else
								$zgvpruefung->isStgFreigegeben = true;

						}
						else
							$zgvpruefung->isRtFreigegeben = true;
					}
				}
            }

            //application priority change possible?
            $zgvpruefung->changeup = false;
            $zgvpruefung->changedown = false;
            $zgvpruefung->hasBewerber = false;

            if (isset($zgvpruefung->prestudentstatus->status_kurzbz) && $zgvpruefung->prestudentstatus->status_kurzbz == self::INTERESSENTSTATUS)
            {
                if (isset($zgvpruefung->prestudentstatus->studiensemester_kurzbz))
                {
                    $studiensemester = $zgvpruefung->prestudentstatus->studiensemester_kurzbz;
                    //show warning if there is already another bewerber (RT result already exists)
                    $bewerber = $this->PersonModel->hasBewerber($person_id, $studiensemester, 'b');

                    if (hasData($bewerber))
                    {
                        $bewerbercnt = getData($bewerber);

                        if (is_numeric($bewerbercnt[0]->anzahl_bewerber) && $bewerbercnt[0]->anzahl_bewerber > 0)
                        {
                            $zgvpruefung->hasBewerber = true;
                        }
                    }

                    $zgvpruefung->changeup = $this->PrestudentModel->checkPrioChange($zgvpruefung->prestudent_id, $studiensemester, -1);
                    $zgvpruefung->changedown = $this->PrestudentModel->checkPrioChange($zgvpruefung->prestudent_id, $studiensemester, 1);
                }
            }

            $zgvpruefungen[] = $zgvpruefung;
		}

		$this->_sortPrestudents($zgvpruefungen);

		$abwstatusgruende = $this->StatusgrundModel->loadWhere(array('status_kurzbz' => self::ABGEWIESENERSTATUS))->retval;
		$intstatusgruende = $this->StatusgrundModel->loadWhere(array('status_kurzbz' => self::INTERESSENTSTATUS))->retval;

		$data = array (
			'zgvpruefungen' => $zgvpruefungen,
			'abwstatusgruende' => $abwstatusgruende,
			'intstatusgruende' => $intstatusgruende
		);

		return $data;
	}

	/**
	 * Helper function for sorting prestudents
	 * @param $zgvpruefungen
	 */
	private function _sortPrestudents(&$zgvpruefungen)
	{
		$this->load->model('organisation/studiensemester_model', 'StudiensemesterModel');

		@usort($zgvpruefungen, function ($a, $b) {
			//sort:
			// 1: Studiensemester
			if (isset($a->prestudentstatus->studiensemester_kurzbz) || isset($b->prestudentstatus->studiensemester_kurzbz))
			{
				if (!isset($a->prestudentstatus->studiensemester_kurzbz))
					return 1;
				elseif(!isset($b->prestudentstatus->studiensemester_kurzbz))
					return -1;

				$starta = $this->StudiensemesterModel->load($a->prestudentstatus->studiensemester_kurzbz);
				if (!hasData($starta))
				{
					show_error(getError($starta));
				}

				$startb = $this->StudiensemesterModel->load($b->prestudentstatus->studiensemester_kurzbz);
				if (!hasData($startb))
				{
					show_error(getError($startb));
				}

				$starta = date_format(date_create($starta->retval[0]->start), 'Y-m-d');
				$startb = date_format(date_create($startb->retval[0]->start), 'Y-m-d');

				if ($starta > $startb)
					return -1;
				elseif ($starta < $startb)
					return 1;
			}
			// 2: Status
			if (isset($a->prestudentstatus->status_kurzbz) || isset($a->prestudentstatus->status_kurzbz))
			{
				if (!isset($b->prestudentstatus->status_kurzbz))
					return -1;
				elseif (!isset ($a->prestudentstatus->status_kurzbz))
					return 1;
				elseif ($a->prestudentstatus->status_kurzbz !== $b->prestudentstatus->status_kurzbz)
				{
					if ($a->prestudentstatus->status_kurzbz === self::INTERESSENTSTATUS)
						return -1;
					elseif ($b->prestudentstatus->status_kurzbz === self::INTERESSENTSTATUS)
						return 1;
				}
			}

			// 3: Priorisierung, Nulls last
			if (isset($a->priorisierung) || isset($b->priorisierung))
			{
				if (!isset($a->priorisierung))
					return 1;
				elseif (!isset($b->priorisierung))
					return -1;
				elseif ($a->priorisierung > $b->priorisierung)
					return 1;
				elseif ($a->priorisierung < $b->priorisierung)
					return -1;
			}

			// 4: Bewerbungsdatum
			$starta = isset($a->prestudentstatus->bewerbung_abgeschicktamum) ? $a->prestudentstatus->bewerbung_abgeschicktamum : null;
			$startb = isset($b->prestudentstatus->bewerbung_abgeschicktamum) ? $b->prestudentstatus->bewerbung_abgeschicktamum : null;

			if (isset($starta) || isset($startb))
			{
				if (!isset($starta))
					return 1;
				elseif(!isset($startb))
					return -1;
				elseif ($starta > $startb)
					return -1;
				elseif ($starta < $startb)
					return 1;
			}

			// 5: prestudentid
			return (int)$b->prestudent_id - (int)$a->prestudent_id;
		});
	}

	/**
	 * Helper function retrieves personid and studiengang kurzbz from a prestudent id
	 * @param $prestudent_id
	 * @return array
	 */
	private function _getPersonAndStudiengangFromPrestudent($prestudent_id)
	{
		$prestudent = $this->PrestudentModel->getPrestudentWithZgv($prestudent_id);

		if (isError($prestudent))
		{
			show_error(getError($prestudent));
		}

		$prestudentdata = getData($prestudent);
		$person_id = $prestudentdata->person_id;
		$studiengang_kurzbz = $prestudentdata->studiengang;
		$studiengang_bezeichnung = $prestudentdata->studiengangbezeichnung;

		return array('person_id' => $person_id, 'studiengang_kurzbz' => $studiengang_kurzbz, 'studiengang_bezeichnung' => $studiengang_bezeichnung);
	}

	/**
	 * Helper function for logging
	 * @param $person_id
	 * @param $logname
	 * @param $messageparams
	 */
	private function _log($person_id, $logname, $messageparams)
	{
		$logdata = $this->_logparams[$logname];

		$datatolog = array(
			'name' => $logdata['name']
		);

		if (isset($logdata['message']))
			$datatolog['message'] = vsprintf($logdata['message'], $messageparams);

		if (array_key_exists('success', $logdata))
			$datatolog['success'] = true;

		$this->personloglib->log(
			$person_id,
			$logdata['logtype'],
			$datatolog,
			self::TAETIGKEIT,
			self::APP,
			null,
			$this->_uid
		);
	}

	/**
	 * Sends infomail to Studiengang with prestudent and person data when Prestudent is freigegeben
	 * @param $prestudent_id
	 */
	private function _sendFreigabeMail($prestudent_id)
	{
		//get data
		$prestudent = $this->PrestudentModel->getPrestudentWithZgv($prestudent_id);
		$prestudent = getData($prestudent);
		$prestudentstatus = $prestudent->prestudentstatus;
		$person_id = $prestudent->person_id;
		$person = $this->PersonModel->getPersonStammdaten($person_id, true)->retval;
		$dokumente = $this->AkteModel->getAktenWithDokInfo($person_id, null, false)->retval;
		$dokumenteNachzureichen = $this->AkteModel->getAktenWithDokInfo($person_id, null, true)->retval;

		//fill mail variables
		$interessentbez = $person->geschlecht == 'm' ? 'Ein Interessent' : 'Eine Interessentin';
		$sprache = $prestudentstatus->sprachedetails->bezeichnung[0];
		$orgform = $prestudentstatus->orgform != '' ? ' ('.$prestudentstatus->orgform.')' : '';
		$statusgrund = isset($prestudentstatus->statusgrund_id) ?
			'<tr>
				<td><b>Statusgrund</b></td>
				<td>'.$prestudentstatus->bezeichnung_statusgrund[0].'</td>
			</tr>' : '';
		//$geschlecht = $person->geschlecht == 'm' ? 'm&auml;nnlich' : 'weiblich';
		//$geburtsdatum = date('d.m.Y', strtotime($person->gebdatum));
		/*$zgvort = !isEmptyString($prestudent->zgvort) ? ' in '.$prestudent->zgvort : '';
		$zgvnation = !isEmptyString($prestudent->zgvnation_bez) ? ', '.$prestudent->zgvnation_bez : '';
		$zgvdatum = !isEmptyString($prestudent->zgvdatum) ? ', am '.date_format(date_create($prestudent->zgvdatum), 'd.m.Y') : '';*/

		$dokumenteNachzureichenMail = $dokumenteMail = array();
		//convert documents to array so they can be parsed, and keeping only needed fields
		$lastel = end($dokumente);
		foreach ($dokumente as $dokument)
		{
			$postfix = $lastel === $dokument ? '' : ' |';
			$dokumenteMail[] = array('dokument_bezeichnung' => $dokument->dokument_bezeichnung.$postfix);
		}

		foreach ($dokumenteNachzureichen as $dokument)
		{
			$anmerkung = !isEmptyString($dokument->anmerkung) ? ' | Anmerkung: '.$dokument->anmerkung : '';
			$nachgereichtam = !isEmptyString($dokument->nachgereicht_am) ? ' | wird nachgereicht bis '.date_format(date_create($dokument->nachgereicht_am), 'd.m.Y') : '';
			$dokumenteNachzureichenMail[] = array('dokument_bezeichnung' => $dokument->dokument_bezeichnung, 'anmerkung' => $anmerkung, 'nachgereicht_am' => $nachgereichtam);
		}

		$notizenBewerbung = $this->NotizModel->getNotizByTitel($person_id, 'Anmerkung zur Bewerbung')->retval;

		$notizentext = '<ul style="padding-left: 20px; margin-left: 0;">';
		foreach ($notizenBewerbung as $notiz)
		{
			// For applicant-notices the user is not shown
			if ($notiz->insertvon != 'online_notiz')
				$notizentext .= '<li>'.$notiz->text.' ('.$notiz->insertvon.')</li>';
			else
				$notizentext .= '<li>'.$notiz->text.'</li>';
		}
		$notizentext .= '</ul>';

		$data = array
		(
			'interessentbez' => $interessentbez,
			'studiengangbez' => $prestudentstatus->studiengangbezeichnung,
			'studiengangtypbez' => $prestudent->studiengangtyp_bez,
			'orgform' => $orgform,
			'studiensemester' => $prestudentstatus->studiensemester_kurzbz,
			'ausbildungssemester' => $prestudentstatus->ausbildungssemester,
			'sprache' => $sprache,
			'vorname' => $person->vorname,
			'nachname' => $person->nachname,
			'prestudentid' => $prestudent_id,
			'statusgrund' => $statusgrund,
			/*'zgvbez' => $prestudent->zgv_bez,
			'zgvort' => $zgvort,
			'zgvdatum' => $zgvdatum,
			'zgvnation' => $zgvnation,
			*/
			'notizentext' => $notizentext,
			'dokumente' => $dokumenteMail,
			'dokumente_nachgereicht' => $dokumenteNachzureichenMail,
			'persondetailslink' => APP_ROOT.'vilesci/personen/personendetails.php?id='.$person_id
		);

		$this->load->library('LogLib');
		$this->load->helper('hlp_sancho');

		$subject = ($person->geschlecht == 'm' ? 'Interessent ' : 'Interessentin ').$person->vorname.' '.$person->nachname.' für '.$prestudentstatus->studiengangbezeichnung.$orgform.' freigegeben';

		$receiver = $prestudent->studiengangmail;

		if (!isEmptyString($receiver))
		{
			//Freigabeinformationmail sent from default system mail to studiengang mail(s)
			sendSanchoMail(
				self::FREIGABE_MAIL_VORLAGE,
				$data,
				$receiver,
				$subject,
				'sancho_header_min_bw.jpg',
				'sancho_footer_min_bw.jpg'
			);
		}
		else
		{
			$this->loglib->logError('Studiengang has no mail for sending Freigabe mail');
		}
	}
}