Merge branch 'main' into issue-3911issue-3911

1 files changed, 0 insertions, 978 deletions

diff --git a/lib/raumzeit/SingleDate.class.php b/lib/raumzeit/SingleDate.class.php
deleted file mode 100644
index 82a89db..0000000
--- a/lib/raumzeit/SingleDate.class.php
+++ /dev/null
@@ -1,978 +0,0 @@
-<?php
-# Lifter002: TODO
-# Lifter007: TODO
-# Lifter003: TODO
-# Lifter010: TODO
-/**
- * SingelDate.class.php - Ein (Ex-)Termin
- *
- * Diese Klasse stellt einen einzelnen Eintrag in der Tabelle termine, bzw. ex_termine dar.
- *
- * 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.
- *
- * @author      Till Glöggler <tgloeggl@uos.de>
- * @license     http://www.gnu.org/licenses/gpl-2.0.html GPL version 2
- * @category    Stud.IP
- */
-require_once 'lib/dates.inc.php';
-
-class SingleDate
-{
-    var $termin_id       = '';
-    var $date_typ        = 1;
-    var $metadate_id     = '';
-    var $date            = 0;
-    var $end_time        = 0;
-    var $mkdate          = 0;
-    var $chdate          = 0;
-    var $orig_ex         = false;
-    var $ex_termin       = false;
-    var $range_id        = '';
-    var $author_id       = '';
-    var $resource_id     = '';
-    var $raum            = '';
-    var $request_id      = NULL;
-    var $requestData     = NULL;
-    var $update          = false;
-    var $issues          = NULL;
-    var $messages        = NULL;
-    var $content         = '';
-    var $room_request    = NULL;
-    var $related_persons = [];
-    var $related_groups  = [];
-
-    /**
-     * Return the SingleDate instance of the given id
-     *
-     * @param string      the id of the instance
-     * @return SingleDate the SingleDate instance
-     */
-    function getInstance($singledate_id)
-    {
-        static $singledate_object_pool;
-
-        if ($singledate_id) {
-            if (is_object($singledate_object_pool[$singledate_id]) && $singledate_object_pool[$singledate_id]->getTerminId() == $singledate_id) {
-                return $singledate_object_pool[$singledate_id];
-            } else {
-                $singledate_object_pool[$singledate_id] = new SingleDate($singledate_id);
-
-                return $singledate_object_pool[$singledate_id];
-            }
-        } else {
-            return new SingleDate();
-        }
-
-    }
-
-    function __construct($data = '')
-    {
-        global $user, $id;
-        $termin_id = '';
-        if ($data instanceOf CourseDate || $data instanceof CourseExDate) {
-            $single_date_data = $data->toArray();
-            $single_date_data['ex_termin'] = $data instanceOf CourseDate ? 0 : 1;
-            $single_date_data['resource_id'] = $data->room_booking->resource_id ?: '';
-            if ($data instanceOf CourseDate) {
-                $single_date_data['related_persons'] = $data->dozenten->pluck('user_id');
-                $single_date_data['related_groups'] = $data->statusgruppen->pluck('statusgruppe_id');
-            }
-            $this->fillValuesFromArray($single_date_data);
-        } else {
-            if (is_array($data)) {
-                if ($data['termin_id']) $termin_id = $data['termin_id'];
-                if ($data['seminar_id']) $id = $data['seminar_id'];
-            } else {
-                $termin_id = $data;
-            }
-            if ($termin_id !== '') {
-                $this->termin_id = $termin_id;
-                $this->update = true;
-                $this->restore();
-            } else {
-                $this->termin_id = md5(uniqid('SingleDate', 1));
-                $this->author_id = $user->id;
-                $this->range_id = $id;
-                $this->mkdate = time();
-                $this->chdate = time();
-                $this->update = false;
-            }
-        }
-    }
-
-    public function __toString()
-    {
-        return $this->toString();
-    }
-
-    function getStartTime()
-    {
-        return $this->date;
-    }
-
-    function setTime($start, $end)
-    {
-        if (($start == 0) || ($end == 0)) return false;
-
-        if (($this->date != $start) || ($this->end_time != $end)) {
-            // validate the passed variables: they have to be ints and $start
-            // has to be smaller than $end
-            if ($this->validate($start, $end)) {
-                $before = $this->toString();
-
-                // if the time-span has been shortened, keep the room-booking,
-                // otherwise remove it.
-                if ($this->resource_id) {
-                    if ($start >= $this->date && $end <= $this->end_time) {
-                        //Shrink the booking.
-                        if ($assign_id = SingleDateDB::getAssignID($this->termin_id)) {
-                            $assign_object = new ResourceBooking($assign_id);
-                            $assign_object->resource_id = $this->resource_id;
-                            $assign_object->begin = $start;
-                            $assign_object->end = $end;
-                            $assign_object->repeat_end = $end;
-                            $assign_object->store();
-                        }
-                    } else {
-                        $this->killAssign();
-                    }
-                }
-
-                $this->date = $start;
-                $this->end_time = $end;
-
-                $after = $this->toString();
-                // logging
-                if ($before) {
-                    StudipLog::log('SINGLEDATE_CHANGE_TIME', $this->range_id, $this->id, $before . ' -> ' . $after);
-                } else {
-                    StudipLog::log('SEM_ADD_SINGLEDATE', $this->range_id, $this->id, $after);
-                }
-
-                return true;
-            }
-
-            return false;
-        }
-
-        return false;
-    }
-
-    function getEndTime()
-    {
-        return $this->end_time;
-    }
-
-    function setComment($comment)
-    {
-        $this->content = $comment;
-    }
-
-    function getComment()
-    {
-        if (!$this->isExTermin()) return '';
-
-        return $this->content;
-    }
-
-    function getMetaDateID()
-    {
-        return $this->metadate_id;
-    }
-
-    function setMetaDateID($id)
-    {
-        if ($id != '') {
-            $this->metadate_id = $id;
-
-            return true;
-        } else {
-            $this->metadate_id = 0;
-
-            return false;
-        }
-    }
-
-    function getRangeID()
-    {
-        return $this->range_id;
-    }
-
-    function setDateType($typ)
-    {
-        $this->date_typ = $typ;
-
-        return true;
-    }
-
-    function getDateType()
-    {
-        return $this->date_typ;
-    }
-
-    function getTypeName()
-    {
-        global $TERMIN_TYP;
-
-        return $TERMIN_TYP[$this->date_typ]['name'];
-    }
-
-    function getAuthorID()
-    {
-        return $this->author_id;
-    }
-
-    function getChDate()
-    {
-        return $this->chdate;
-    }
-
-    function getMkDate()
-    {
-        return $this->mkdate;
-    }
-
-    function setSeminarID($seminar_id)
-    {
-        $this->range_id = $seminar_id;
-    }
-
-    function getSeminarID()
-    {
-        return $this->range_id;
-    }
-
-    function getSingleDateID()
-    {
-        return $this->termin_id;
-    }
-
-    function getResourceID()
-    {
-        return $this->resource_id;
-    }
-
-    function getTerminID()
-    {
-        return $this->termin_id;
-    }
-
-    function getFreeRoomText()
-    {
-        return $this->raum;
-    }
-
-    function setFreeRoomText($freeRoomText)
-    {
-        $this->raum = $freeRoomText;
-    }
-
-    function getCycleID()
-    {
-        return $this->metadate_id;
-    }
-
-    /**
-     * @deprecated
-     */
-    function killIssue()
-    {
-        $issue_ids = $this->getIssueIDs();
-        if (count($issue_ids) > 0) {
-            CourseTopic::deleteBySQL("issue_id IN (?)", $issue_ids);
-
-            foreach ($issue_ids as $issue_id) {
-                unset($this->issues[$issue_id]);
-            }
-        }
-    }
-
-    function delete()
-    {
-        $cache = StudipCacheFactory::getCache();
-        $cache->expire('course/undecorated_data/' . $this->range_id);
-
-        $this->chdate = time();
-        $this->killAssign();
-
-        return SingleDateDB::deleteSingleDate($this->termin_id, $this->ex_termin);
-    }
-
-    function store()
-    {
-
-        $cache = StudipCacheFactory::getCache();
-        $cache->expire('course/undecorated_data/' . $this->range_id);
-
-        $this->chdate = time();
-        if ($this->ex_termin) {
-            $this->killAssign();
-        }
-
-        // date_typ = 0 defaults to TERMIN_TYP[1] because there never exists one with zero
-        if (!$this->date_typ) $this->date_typ = 1;
-
-        if ($this->orig_ex != $this->ex_termin) {
-            SingleDateDB::deleteSingleDate($this->termin_id, $this->orig_ex);
-        }
-
-        return SingleDateDB::storeSingleDate($this);
-    }
-
-    function restore()
-    {
-        if (!($data = SingleDateDB::restoreSingleDate($this->termin_id))) {
-            return false;
-        }
-        $this->fillValuesFromArray($data);
-
-        return true;
-    }
-
-    function setExTermin($ex)
-    {
-        if ($ex != $this->ex_termin) {
-            $this->update = false;
-            $this->ex_termin = $ex;
-
-            return true;
-        }
-
-        return false;
-    }
-
-    function isExTermin()
-    {
-        return $this->ex_termin;
-    }
-
-    function isPresence()
-    {
-        return $GLOBALS['TERMIN_TYP'][$this->date_typ]['sitzung'] ? true : false;
-    }
-
-    function isUpdate()
-    {
-        return $this->update;
-    }
-
-    function isHoliday()
-    {
-        $name = null;
-        foreach (SemesterHoliday::getAll() as $val) {
-            if (($val['beginn'] <= $this->date) && ($val['ende'] >= $this->end_time)) {
-                $name = $val['name'];
-            }
-        }
-
-        if (!$name) {
-            $holy_type = holiday($this->date);
-            $name = $holy_type['name'];
-        }
-
-        if ($name) {
-            return $name;
-        } else {
-            return false;
-        }
-    }
-
-    function fillValuesFromArray($daten)
-    {
-        $this->metadate_id = $daten['metadate_id'];
-        $this->termin_id = $daten['termin_id'];
-        if ($daten['date_typ'] != 0) {
-            $this->date_typ = $daten['date_typ'];
-        } else {
-            // if no date_typ is specified it defaults to 1
-            $this->date_typ = 1;
-        }
-        $this->date = $daten['date'];
-        $this->end_time = $daten['end_time'];
-        $this->mkdate = $daten['mkdate'];
-        $this->chdate = $daten ['chdate'];
-        $this->ex_termin = $daten['ex_termin'] ?? null;
-        $this->orig_ex = $daten['ex_termin'] ?? null;
-        $this->range_id = $daten['range_id'];
-        $this->author_id = $daten['autor_id'];
-        $this->resource_id = $daten['resource_id'];
-        $this->raum = $daten['raum'];
-        $this->content = $daten['content'];
-        $this->update = true;
-        $this->related_persons = is_array($daten['related_persons']) ? $daten['related_persons'] : [];
-        $this->related_groups = is_array($daten['related_groups']) ? $daten['related_groups'] : [];
-
-        return true;
-    }
-
-    function toString()
-    {
-        $end_hours = strtotime(strftime('%H:%M', $this->end_time));
-        $start_hours = strtotime(strftime('%H:%M', $this->date));
-        if (!$this->date) {
-            return null;
-        } elseif ((($end_hours - $start_hours) / 60 / 60) > 23) {
-            return sprintf('%s (%s)', strftime('%A, %d.%m.%Y', $this->date),
-                _('ganztägig'));
-        } else {
-            return sprintf('%s - %s', strftime('%A, %d.%m.%Y %H:%M', $this->date),
-                strftime('%H:%M', $this->end_time));
-        }
-    }
-
-    function bookRoom($room_id, $preparation_time = 0)
-    {
-        if ($this->ex_termin || !$room_id) {
-            return false;
-        }
-
-        // create a resource-object of the passed room
-        $room = Room::find($room_id);
-
-        // there is no room with the passed id
-        if (!$room) {
-            return false;
-        }
-
-        // check permissions (is current user allowed to book the passed room?)
-        if (!$room->userHasBookingRights(User::findCurrent(), $this->date, $this->end_time)) {
-            return false;
-        }
-
-        // clear the freetext-field, if we book a room
-        $this->setFreeRoomText('');
-        $this->store();
-
-        //If there is already a room assigned, "change" the booking.
-        //Otherwise create a new one.
-        if ($this->resource_id != '') {
-            $this->changeAssign($room, $preparation_time);
-        } else {
-            $this->insertAssign($room, $preparation_time);
-        }
-
-        return $room;
-    }
-
-
-    /**
-     * This method converts overlap data about an overlapping booking
-     * to a string that can be used to output overlap information to the user.
-     * Only one overlap is converted by this method. For multiple overlaps
-     * this method must be called multiple times.
-     *
-     * @param ResourceBooking $booking The overlapping booking.
-     *
-     * @return string A string representation of the overlap.
-     */
-    protected function getOverlapMessage(ResourceBooking $booking)
-    {
-        $message = '';
-
-        if ($booking->booking_type == ResourceBooking::TYPE_LOCK) {
-            $message .= sprintf(
-                _('Vom %1$s, %2$s Uhr bis zum %3$s, %4$s Uhr (Sperrzeit)') . "\n",
-                date("d.m.Y", $booking->begin),
-                date("H:i", $booking->begin),
-                date("d.m.Y", $booking->end),
-                date("H:i", $booking->end)
-            );
-        } else {
-            $course = Course::find($booking->course_id);
-
-            if ($course) {
-                $user_has_permissions = $GLOBALS['perm']->have_studip_perm(
-                    'dozent',
-                    $course->id,
-                    $GLOBALS['user']->id
-                );
-                if ($user_has_permissions) {
-                    $course_link = URLHelper::getLink(
-                        'dispatch.php/course/timesrooms/index',
-                        [
-                            'cid' => $course->id
-                        ]
-                    );
-                    $message .= sprintf(
-                        _('Am %1$s von %2$s bis %3$s Uhr durch Veranstaltung %4$s') . "\n",
-                        date('d.m.Y', $booking->begin),
-                        date('H:i', $booking->begin),
-                        date('H:i', $booking->end),
-                        sprintf(
-                            '<a href="%1$s">%2$s</a>',
-                            $course_link,
-                            htmlReady($course->name)
-                        )
-                    );
-                } else {
-                    $course_link = URLHelper::getLink(
-                        'dispatch.php/course/details',
-                        [
-                            'sem_id' => $course->id
-                        ]
-                    );
-                    $message .= sprintf(
-                        _('Am %1$s von %2$s bis %3$s Uhr durch Veranstaltung %4$s') . "\n",
-                        date('d.m.Y', $booking->begin),
-                        date('H:i', $booking->begin),
-                        date('H:i', $booking->end),
-                        sprintf(
-                            '<a href="%1$s">%2$s</a>',
-                            $course_link,
-                            htmlReady($course->name)
-                        )
-                    );
-                }
-            } else {
-                $message .= sprintf(
-                    _('Am %1$s von %2$s bis %3$s Uhr belegt von "%4$s"') . "\n",
-                    date("d.m.Y", $booking->begin),
-                    date("H:i", $booking->begin),
-                    date("H:i", $booking->end),
-                    htmlReady($booking->description)
-                );
-            }
-        }
-
-        return $message;
-    }
-
-
-    private function insertAssign(Room $room, $preparation_time = 0)
-    {
-        $begin = new DateTime();
-        $begin->setTimestamp($this->date);
-        $end = new DateTime();
-        $end->setTimestamp($this->end_time);
-
-        //If the following code is executed a new room booking can be created:
-        try {
-            $booking = $room->createBooking(
-                User::findCurrent(),
-                $this->termin_id,
-                [
-                    [
-                        'begin' => $begin,
-                        'end' => $end
-                    ]
-                ],
-                null,
-                0,
-                null,
-                $preparation_time * 60
-            );
-            if ($booking instanceof ResourceBooking) {
-                $booking->deleteOverlappingReservations();
-                $room_link_string = sprintf(
-                    '<a href="%1$s" data-dialog="1">%2$s</a>',
-                    $room->getActionLink(),
-                    htmlReady($room->name)
-                );
-
-                SingleDateDB::storeSingleDate($this);
-                $msg = sprintf(
-                    _('Für den Termin %1$s wurde der Raum %2$s gebucht.'),
-                    $this->toString(),
-                    $room_link_string
-                );
-                $this->messages['success'][] = $msg;
-            }
-        } catch (ResourceBookingRangeException $e) {
-            $this->messages['error'][] = _('Fehler beim Verknüpfen der Raumbelegung mit dem Einzeltermin!');
-            return false;
-        } catch (ResourceBookingOverlapException $e) {
-            $error_message = sprintf(
-                _('Für den Termin %1$s konnte der Raum %2$s nicht gebucht werden, da es Überschneidungen mit folgenden Terminen gibt:'),
-                $this->toString(),
-                htmlReady($room->name)
-                ) . '<br>';
-            $overlapping_bookings = array_merge(
-                $room->getResourceBookings($begin, $end),
-                $room->getResourceLocks($begin, $end)
-            );
-            foreach ($overlapping_bookings as $overlapping_booking) {
-                $course_link = null;
-                if ($overlapping_booking->course) {
-                    $user_is_lecturer = $GLOBALS['perm']->have_studip_perm(
-                        'dozent',
-                        $overlapping_booking->course->id,
-                        $GLOBALS['user']->id
-                    );
-                    if ($user_is_lecturer) {
-                        $course_link = URLHelper::getLink(
-                            'dispatch.php/course/timesrooms/index',
-                            [
-                                'cid' => $overlapping_booking->course->id
-                            ]
-                        );
-                    }
-                }
-
-                $error_message .= $this->getOverlapMessage(
-                    $overlapping_booking
-                );
-            }
-            $this->messages['error'][] = $error_message;
-            return false;
-        } catch (ResourcePermissionException $e) {
-            $this->messages['error'][] = $e->getMessage();
-            return false;
-        } catch (ResourceBookingException $e) {
-            $this->messages['error'][] = $e->getMessage();
-            return false;
-        }
-
-        return true;
-    }
-
-
-    private function changeAssign(Room $room, $preparation_time = 0)
-    {
-        $max_preparation_time = (Config::get()->RESOURCES_MAX_PREPARATION_TIME);
-        if ($preparation_time > $max_preparation_time) {
-            $this->messages['error'][] = sprintf(
-                _('Die eingegebene Rüstzeit überschreitet das erlaubte Maximum von %d Minuten!'),
-                $max_preparation_time
-            );
-            return false;
-        }
-        if ($assign_id = SingleDateDB::getAssignID($this->termin_id)) {
-            $changeAssign = new ResourceBooking($assign_id);
-            $changeAssign->resource_id = $room->id;
-            $changeAssign->range_id = $this->termin_id;
-            $changeAssign->begin = $this->date;
-            $changeAssign->end = $this->end_time;
-            $changeAssign->repeat_end = $this->end_time;
-            $changeAssign->repetition_interval = '';
-            if ($preparation_time > 0) {
-                $changeAssign->preparation_time = $preparation_time * 60;
-            }
-
-            $room_link_string = sprintf(
-                '<a href="%1$s" data-dialog="1">%2$s</a>',
-                $room->getActionLink(),
-                htmlReady($room->name)
-            );
-
-            $overlaps = $changeAssign->getOverlappingBookings();
-            if (is_array($overlaps) && (sizeof($overlaps) > 0)) {
-                $msg = sprintf(
-                    _('Für den Termin %1$s konnte der Raum %2$s nicht gebucht werden, da es Überschneidungen mit folgenden Terminen gibt:'),
-                    $this->toString(),
-                    $room_link_string
-                    ) . '<br>';
-                foreach ($overlaps as $overlap) {
-                    $msg .= $this->getOverlapMessage($overlap);
-                }
-                $this->messages['error'][] = $msg;
-
-                return false;
-            }
-
-            $this->resource_id = $room->id;
-            try {
-                $changeAssign->store();
-            } catch (ResourceBookingOverlapException $e) {
-                $room = $changeAssign->resource->getDerivedClassInstance();
-                if($room instanceof Room) {
-                    $room_text = $link = sprintf(
-                        '<a href="%1$s" data-dialog="1">%2$s</a>',
-                        $room->getActionLink(),
-                        htmlReady($room->name)
-                    );
-                } else {
-                    $room_text = $changeAssign->resource->name;
-                }
-                $this->messages['error'][] = sprintf(
-                    _('%1$s: Die Buchung vom %2$s bis %3$s konnte wegen Überlappungen nicht gespeichert werden: %4$s'),
-                    $room_text,
-                    date('d.m.Y H:i', $changeAssign->begin),
-                    date('H:i', $changeAssign->end),
-                    htmlReady($e->getMessage())
-                );
-            }
-
-            $msg = sprintf(
-                _('Für den Termin %1$s wurde der Raum %2$s gebucht.'),
-                $this->toString(),
-                $room_link_string
-            );
-            $this->messages['success'][] = $msg;
-
-            return true;
-        }
-
-        return false;
-    }
-
-    function killAssign()
-    {
-        $this->resource_id = '';
-        if ($assign_id = SingleDateDB::getAssignID($this->termin_id)) {
-            $assign_object = new ResourceBooking($assign_id);
-            $assign_object->delete();
-        }
-    }
-
-
-    /**
-     * Returns the room name for this SingleDate object.
-     *
-     * @returns string The room name.
-     */
-    public function getRoom()
-    {
-        if (!$this->resource_id) {
-            return null;
-        } else {
-            $room = Room::find($this->resource_id);
-
-            return $room->name;
-        }
-    }
-
-
-    function readIssueIDs()
-    {
-        if (!$this->issues) {
-            if ($data = SingleDateDB::getIssueIDs($this->termin_id)) {
-                foreach ($data as $val) {
-                    $this->issues[$val['issue_id']] = $val['issue_id'];
-                }
-            }
-        }
-
-        return true;
-    }
-
-    function getIssueIDs()
-    {
-        $this->readIssueIDs();
-
-        return $this->issues;
-    }
-
-    function addIssueID($issue_id)
-    {
-        $this->readIssueIDs();
-        $this->issues[$issue_id] = $issue_id;
-
-        return true;
-    }
-
-    function deleteIssueID($issue_id)
-    {
-        $this->readIssueIDs();
-        unset($this->issues[$issue_id]);
-        SingleDateDB::deleteIssueID($issue_id, $this->termin_id);
-
-        return true;
-    }
-
-    function getMessages()
-    {
-        $temp = $this->messages;
-        $this->messages = NULL;
-
-        return $temp;
-    }
-
-    // checks, if the single-date has plausible values
-    function validate($start = 0, $end = 0)
-    {
-        if ($start == 0) {
-            $start = $this->date;
-        }
-        if ($end == 0) {
-            $end = $this->end_time;
-        }
-
-        if ($start < 100000) return false;
-        if ($end < 100000) return false;
-        if ($start > $end) {
-            $this->messages['error'][] = _("Die Endzeitpunkt darf nicht vor dem Anfangszeitpunkt liegen!");
-
-            return false;
-        }
-
-        return true;
-    }
-
-
-    /**
-     * returns a html representation of the date
-     *
-     * @param  array  optional variables which are passed to the template
-     * @return  string  the html-representation of the date
-     *
-     * @author Till Glöggler <tgloeggl@uos.de>
-     */
-    function getDatesHTML($params = [])
-    {
-        $template = $GLOBALS['template_factory']->open('dates/date_html.php');
-        $template->set_attributes($params);
-
-        return $this->getDatesTemplate($template);
-    }
-
-    /**
-     * returns a representation without html of the date
-     *
-     * @param  array  optional variables which are passed to the template
-     * @return  string  the representation of the date without html
-     *
-     * @author Till Glöggler <tgloeggl@uos.de>
-     */
-    function getDatesExport($params = [])
-    {
-        $template = $GLOBALS['template_factory']->open('dates/date_export.php');
-        $params['link'] = false;
-        $template->set_attributes($params);
-
-        return $this->getDatesTemplate($template);
-    }
-
-    /**
-     * returns a xml-representation of the date
-     *
-     * @param  array  optional variables which are passed to the template
-     * @return  string  the xml-representation of the date
-     *
-     * @author Till Glöggler <tgloeggl@uos.de>
-     */
-    function getDatesXML($params = [])
-    {
-        $template = $GLOBALS['template_factory']->open('dates/date_xml.php');
-        $template->set_attributes($params);
-
-        return $this->getDatesTemplate($template);
-    }
-
-    /**
-     * returns a representation of the date with a specifiable template
-     *
-     * @param  mixed  this can be a template-object or a string pointing to a template in path_to_studip/templates
-     * @return  string  the template output of the date
-     *
-     * @author Till Glöggler <tgloeggl@uos.de>
-     */
-    function getDatesTemplate($template)
-    {
-        if (!$template instanceof Flexi_Template && is_string($template)) {
-            $template = $GLOBALS['template_factory']->open($template);
-        }
-
-        $template->set_attribute('date', $this);
-
-        return $template->render();
-    }
-
-    /**
-     * adds a given user_id as a related person to the date
-     * @param string $user_id user_id from auth_user_md5 of the person to be added
-     */
-    public function addRelatedPerson($user_id)
-    {
-        $this->related_persons[] = $user_id;
-        $this->related_persons = array_unique($this->related_persons);
-    }
-
-    /**
-     * unsets a given user_id from the array of related persons
-     * @param string $user_id user_id from auth_user_md5 of the person to be added
-     */
-    public function deleteRelatedPerson($user_id)
-    {
-        if (!$this->related_persons) {
-            $sem = Seminar::getInstance($this->getSeminarID());
-            $this->related_persons = array_keys($sem->getMembers('dozent'));
-        }
-        foreach ($this->related_persons as $key => $related_person) {
-            if ($related_person === $user_id) {
-                unset($this->related_persons[$key]);
-            }
-        }
-    }
-
-    /**
-     * gets all user_ids of related persons of this date
-     * @return array of user_ids
-     */
-    public function getRelatedPersons()
-    {
-        if (count($this->related_persons)) {
-            return $this->related_persons;
-        } else {
-            $sem = Seminar::getInstance($this->getSeminarID());
-
-            return array_keys($sem->getMembers('dozent'));
-        }
-    }
-
-    /**
-     * clears all related persons (in the interface this means that all dozents are
-     * marked as related to the date)
-     */
-    public function clearRelatedPersons()
-    {
-        $this->related_persons = [];
-    }
-
-    /**
-     * adds a given statusgruppe_id as a related group to the date
-     * @param string $statusgruppe_id statusgruppe_id from statusgruppen of the group to be added
-     */
-    public function addRelatedGroup($statusgruppe_id)
-    {
-        $this->related_groups[] = $statusgruppe_id;
-        $this->related_groups = array_unique($this->related_groups);
-    }
-
-    /**
-     * unsets a given statusgruppe_id from the array of related statusgruppen
-     * @param string $statusgruppe_id statusgruppe_id from statusgruppen of the group to be removed
-     */
-    public function deleteRelatedGroup($statusgruppe_id)
-    {
-        if (!$this->related_groups) {
-            $groups = Statusgruppen::findBySeminar_id($this->getSeminarID());
-            $this->related_groups = array_map(function ($g) {
-                return $g->getId();
-            }, $groups);
-        }
-        foreach ($this->related_groups as $key => $related_group) {
-            if ($related_group === $statusgruppe_id) {
-                unset($this->related_groups[$key]);
-            }
-        }
-    }
-
-    /**
-     * gets all statusgruppe_ids of related groups of this date
-     * @return array of statusgruppe_ids
-     */
-    public function getRelatedGroups()
-    {
-        if (count($this->related_groups)) {
-            return $this->related_groups;
-        } else {
-            $groups = Statusgruppen::findBySeminar_id($this->getSeminarID());
-
-            return array_map(function ($g) {
-                return $g->getId();
-            }, $groups);
-        }
-    }
-
-    /**
-     * clears all related groups
-     */
-    public function clearRelatedGroups()
-    {
-        $this->related_groups = [];
-        $this->messages['success'][] = _('Die beteiligten Gruppen wurden zurückgesetzt!');
-    }
-}