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

1 files changed, 0 insertions, 814 deletions

diff --git a/lib/classes/InstituteCalendarHelper.class.php b/lib/classes/InstituteCalendarHelper.class.php
deleted file mode 100644
index 9412a34..0000000
--- a/lib/classes/InstituteCalendarHelper.class.php
+++ /dev/null
@@ -1,814 +0,0 @@
-<?php
-
-/**
- * InstituteCalendarHelper.class.php - class for institute calendar convenience functions
- *
- * @author      Timo Hartge <hartge@data-quest>
- * @license     http://www.gnu.org/licenses/gpl-2.0.html GPL version 2
- * @category    Stud.IP
- *
- */
-
-class InstituteCalendarHelper
-{
-    const COLUMN_DATAFIELD_ID = '69f6485f3c937766866a03d9d642ecbb';
-    const COLOR_DATAFIELD_ID = '41cda2be71fe9efd6e28b853fc0681f3';
-    const INST_DEFAULT_COLOR_DATAFIELD_ID = '0c63321a8e93b3ccc927611709248e07';
-    const DEFAULT_EVENT_COLOR = '#899ab9';
-
-    /**
-     * Returns the default calendar columns.
-     *
-     * @return array   default column names
-     */
-    private static function getDefaultColumns()
-    {
-        return [
-            1 => ['Spalte 1', 1],
-            2 => ['Spalte 2', 1],
-            3 => ['Spalte 3', 1],
-            4 => ['Spalte 4', 1],
-            5 => ['Spalte 5', 1],
-            6 => ['Spalte 6', 1]
-        ];
-    }
-
-    /**
-     * Fetches the stores columns merged with defaults.
-     *
-     * @param string $institut_id
-     * @param boolean $only_visible only return visible columns
-     *
-     * @return array column array in a fullcalender expected format
-     */
-    public static function getResourceColumns($institut_id, $only_visible = false)
-    {
-        /*
-        returns the columns in following format:
-            $columns = [
-                ['id' => '0', 'title' => 'Sammelspalte'],
-                ['id' => '1', 'title' => 'Spalte 1']
-            ];
-        */
-
-        $columns = [];
-        $inst_columns = [
-            0 => ['Sammelspalte', 1]
-        ];
-
-        $db_inst_columns = InstitutePlanColumn::findByInstitute($institut_id);
-
-        if ($db_inst_columns) {
-            foreach ($db_inst_columns as $col_info) {
-                $inst_columns[$col_info['column']] = [$col_info['name'], $col_info['visible']];
-            }
-        } else {
-            $inst_columns = array_merge($inst_columns, self::getDefaultColumns());
-        }
-        foreach ($inst_columns as $id => $info) {
-            if ($only_visible && !$info[1]) continue;
-            $columns[] = ['id' => $id, 'title' => $info[0], 'visible' => $info[1]];
-        }
-        return $columns;
-    }
-
-    /**
-     * Adds the default resource columns
-     *
-     * @param string $institut_id
-     *
-     * @return int last resource column number
-     */
-    public static function addDefaultResourceColumns($institut_id)
-    {
-        $max_col = 0;
-        foreach (self::getDefaultColumns() as $col_id => $col_info) {
-            $new_col = new InstitutePlanColumn([$institut_id, $col_id]);
-            $new_col->name = $col_info[0];
-            $new_col->visible = $col_info[1];
-            if ($new_col->store()) {
-                $max_col = $col_id;
-            }
-        }
-        return $max_col;
-    }
-
-    /**
-     * Adds a resource column
-     *
-     * @param string $institut_id
-     * @param string $name
-     * @param int $specific_column_number
-     *
-     * @return int number of affected rows
-     */
-    public static function addResourceColumn($institut_id, $name, $specific_column_number = 0)
-    {
-        $last_col = InstitutePlanColumn::getLastColumnOfInstitute($institut_id);
-        if ($last_col !== null) {
-            $max_col = $last_col->column;
-        } else {
-            $max_col = self::addDefaultResourceColumns($institut_id);
-        }
-        $column_number = $specific_column_number>0?$specific_column_number:intval($max_col)+1;
-        $new_col = new InstitutePlanColumn([$institut_id, $column_number]);
-        $new_col->name = $name;
-        $new_col->visible = 1;
-        return $new_col->store();
-    }
-
-    /**
-     * Looks up column id for course events
-     *
-     * @param Course $course
-     *
-     * @return array course events with column id
-     */
-    public static function getCourseEventcolumns(Course $course)
-    {
-        $df = DatafieldEntryModel::findByModel($course, self::COLUMN_DATAFIELD_ID);
-        if ($df[0] && $df[0]->content) {
-            $event_columns = unserialize($df[0]->content);
-        } else {
-            $event_columns = [];
-        }
-        return $event_columns;
-    }
-
-    /**
-     * Sets the column id for course events
-     *
-     * @param Course $course
-     * @param string $event_id SeminarCycleDate id
-     * @param string $institut_id
-     * @param string $column number of the column
-     *
-     * @return bool stored
-     */
-    public static function setCourseEventcolumn($course, $event_id, $institut_id, $column)
-    {
-        $df = DatafieldEntryModel::findByModel($course, self::COLUMN_DATAFIELD_ID);
-        if ($df[0]) {
-            $event_columns = self::getCourseEventcolumns($course);
-            if (!is_array($event_columns[$event_id])) {
-                unset($event_columns[$event_id]);
-            }
-            $event_columns[$event_id][$institut_id] = $column;
-            $df[0]->content = serialize($event_columns);
-            return $df[0]->store();
-        }
-        return false;
-    }
-
-    /**
-     * Looks up color value for course events
-     *
-     * @param Course $course
-     *
-     * @return array course events with color value
-     */
-    public static function getCourseEventcolors($course)
-    {
-        $df = DatafieldEntryModel::findByModel($course, self::COLOR_DATAFIELD_ID);
-        if ($df[0] && $df[0]->content) {
-            $event_colors = unserialize($df[0]->content);
-        } else {
-            $event_colors = [];
-        }
-        return $event_colors;
-    }
-
-    /**
-     * Sets color value for course events
-     *
-     * @param Course $course
-     * @param string $event_id SeminarCycleDate id
-     * @param string $institut_id
-     * @param string $color colorcode
-     *
-     * @return bool stored
-     */
-    public static function setCourseEventcolor($course, $event_id, $institut_id, $color)
-    {
-        $df = DatafieldEntryModel::findByModel($course, self::COLOR_DATAFIELD_ID);
-        if ($df[0]) {
-            $event_colors = self::getCourseEventcolors($course);
-            if (!is_array($event_colors[$event_id])) {
-                unset($event_colors[$event_id]);
-            }
-            $event_colors[$event_id][$institut_id] = $color;
-            $df[0]->content = serialize($event_colors);
-            return $df[0]->store();
-        }
-        return false;
-    }
-
-    /**
-     * Looks up default color value for institute course events
-     *
-     * @param Course $course
-     *
-     * @return array course events with color value
-     */
-    public static function getInstituteDefaultEventcolors($institut)
-    {
-        $df = DatafieldEntryModel::findByModel($institut, self::INST_DEFAULT_COLOR_DATAFIELD_ID);
-        if ($df && $df[0]->content) {
-            $event_colors = unserialize($df[0]->content);
-        } else {
-            $event_colors = [];
-        }
-        return $event_colors;
-    }
-
-    /**
-     * Sets default institute course events color value for semtypes
-     *
-     * @param Institut $institut
-     * @param string $semtype
-     * @param string $color colorcode
-     *
-     * @return bool stored
-     */
-    public static function setInstituteDefaultEventcolor($institut, $semtype, $color)
-    {
-        $df = DatafieldEntryModel::findByModel($institut, self::INST_DEFAULT_COLOR_DATAFIELD_ID);
-        if ($df[0]) {
-            $event_colors = self::getInstituteDefaultEventcolors($institut);
-            $event_colors[$semtype['name']] = $color;
-            $df[0]->content = serialize($event_colors);
-            return $df[0]->store();
-        }
-        return false;
-    }
-
-    /**
-     * Sets color value for every course events of given courses semtype
-     *
-     * @param Course $course
-     * @param string $institut_id
-     * @param string $color colorcode
-     *
-     * @return bool stored
-     */
-    public static function setSemtypeEventcolor($course, $institut_id, $color)
-    {
-        $semtype = $course->getSemType();
-        $institut = Institute::find($institut_id);
-        if ($institut) {
-            self::setInstituteDefaultEventcolor($institut, $semtype, $color);
-        }
-        $courses = Course::findBySQL('status =? AND Institut_id=?', [$semtype['id'], $course->institut_id]);
-        if ($courses) {
-            foreach ($courses as $semtype_course) {
-                foreach (SeminarCycleDate::findBySeminar($semtype_course->seminar_id) as $cycle_date) {
-                    self::setCourseEventcolor($semtype_course, $cycle_date->id, $institut_id, $color);
-                }
-            }
-            return true;
-        }
-        return false;
-    }
-
-    /**
-     * Prepares an array of course id and names for creation of dropable calendar events
-     *
-     * @param array $courses Array of courses
-     * @param array $semester Semester
-     *
-     * @return array prepared array
-     */
-    public static function getEventlessCourses($courses, $semester = null)
-    {
-        $eventless = [];
-        foreach (array_keys($courses) as $cid) {
-            $course = Course::find($cid);
-            $cycle_dates = SeminarCycleDate::findBySeminar($course->seminar_id);
-            if (count($cycle_dates) < 1) {
-                $eventless[$cid] = $course->getFullName('number-name');
-            } elseif ($semester) {
-                $has_date_in_semester = false;
-                foreach ($cycle_dates as $cycle_date) {
-                    foreach ($cycle_date->getAllDates() as $course_date) {
-                        if ($course_date->date >= $semester->beginn && $course_date->date <= $semester->ende) {
-                            $has_date_in_semester = true;
-                            break;
-                        }
-                    }
-                    if ($has_date_in_semester) break;
-                }
-                if (!$has_date_in_semester) {
-                    $eventless[$cid] = $course->getFullName('number-name');
-                }
-            }
-        }
-        return $eventless;
-    }
-
-    /**
-     * Creates FullCalendar event date of course events
-     *
-     * @param array $courses Array of courses
-     * @param string $institut_id
-     * @param array $semester Semester
-     * @param array $specific_weekday fetch only events for specific weekday
-     *
-     * @return array fullcalendar events
-     */
-    public static function getEvents($courses, $institut_id, $semester = null, $specific_weekday = null)
-    {
-        $events = [];
-        $today = date('w');
-
-        $user_insts = array_map(function ($arr) {
-            return $arr['Institut_id'];
-        }, Institute::getMyInstitutes($GLOBALS['user']->id));
-
-        $min_time = explode(':', Config::get()->INSTITUTE_COURSE_PLAN_START_HOUR);
-        $minbigtime = (int) $min_time[0];
-        $max_time = explode(':', Config::get()->INSTITUTE_COURSE_PLAN_END_HOUR);
-        $maxbigtime = (int) $max_time[0];
-
-        $institut = Institute::find($institut_id);
-        $inst_default_colors = self::getInstituteDefaultEventcolors($institut);
-
-        Course::findAndMapMany(function ($course) use (
-            $courses,
-            &$events,
-            $today,
-            $minbigtime,
-            $maxbigtime,
-            $user_insts,
-            $institut_id,
-            $inst_default_colors,
-            $semester,
-            $specific_weekday
-        ) {
-            $semtype = $course->getSemType();
-
-            $event_columns = self::getCourseEventcolumns($course) ?: [];
-            $event_colors = self::getCourseEventcolors($course) ?: [];
-
-            if (in_array($course->institut_id, $user_insts)) {
-                $is_editable = true;
-                $is_start_editable = !LockRules::Check($course->id, 'room_time');
-                $is_duration_editable = false;
-            } else {
-                $is_editable = false;
-                $is_start_editable = false;
-                $is_duration_editable = false;
-            }
-
-            foreach (SeminarCycleDate::findBySeminar($course->seminar_id) as $cycle_date) {
-                if ($semester) {
-                    $has_date_in_semester = false;
-                    foreach ($cycle_date->getAllDates() as $course_date) {
-                        if ($course_date->date >= $semester->beginn && $course_date->date <= $semester->ende) {
-                            $has_date_in_semester = true;
-                            break;
-                        }
-                    }
-                    if (!$has_date_in_semester) {
-                        continue;
-                    }
-                }
-
-                if (is_numeric($specific_weekday) && $specific_weekday != $cycle_date['weekday']) {
-                    continue;
-                }
-
-                $conform = true;
-
-                if ($cycle_date['weekday'] == 0) {
-                    $day_offset = 7 - $today;
-                } else {
-                    $day_offset = $cycle_date['weekday'] - $today;
-                }
-
-                $start_time = explode(':', $cycle_date['start_time']);
-                $bigtime = (int) $start_time[0];
-                if ($bigtime > $maxbigtime || $bigtime < $minbigtime) {
-                    $conform = false;
-                } elseif ($bigtime % 2) {
-                    $bigtime--;
-                }
-                $start_time = $bigtime . ':00:00';
-
-                $end_time = explode(':', $start_time);
-                $end_time[0] += 2;
-                $end_time = implode(':', $end_time);
-
-                $move_url = URLHelper::getURL('dispatch.php/admin/courseplanning/move_event');
-                $name = $course->getFullName('number-name');
-
-                if ($start_time != $cycle_date['start_time'] && $end_time != $cycle_date['end_time']) {
-                    $start = self::iso8601date(strtotime($day_offset . ' days'), $cycle_date['start_time']);
-                    $end = self::iso8601date(strtotime($day_offset . ' days'), $cycle_date['end_time']);
-                    $backgroundcolor = '#6c737a';
-                    $textcolor = '#ffffff';
-                } else {
-                    $start = self::iso8601date(strtotime($day_offset . ' days'), $start_time);
-                    $end = self::iso8601date(strtotime($day_offset . ' days'), $end_time);
-
-                    $backgroundcolor = null;
-                    if (array_key_exists($cycle_date->id, $event_colors)) {
-                        if (is_array($event_colors[$cycle_date->id]) && array_key_exists($institut_id, $event_colors[$cycle_date->id])) {
-                            $backgroundcolor = $event_colors[$cycle_date->id][$institut_id];
-                        }
-                    }
-                    if (!$backgroundcolor) {
-                        $backgroundcolor = array_key_exists($semtype['name'], $inst_default_colors)
-                                         ? $inst_default_colors[$semtype['name']]
-                                         : self::DEFAULT_EVENT_COLOR;
-                    }
-
-                    $textcolor = '#ffffff';
-                    if (self::calculateLuminosityRatio($backgroundcolor, $textcolor) < 3) {
-                        $textcolor = '#000000';
-                    }
-                }
-                if (!$is_editable) {
-                    $backgroundcolor = '#c4c7c9';
-                    $textcolor = '#000000';
-                }
-
-                $resource_column = '0';
-                if (array_key_exists($cycle_date->id, $event_columns)) {
-                    if (is_array($event_columns[$cycle_date->id]) && array_key_exists($institut_id, $event_columns[$cycle_date->id])) {
-                        $resource_column = $event_columns[$cycle_date->id][$institut_id];
-                    }
-                }
-
-                $events[] = [
-                    'resourceId'       => $resource_column,
-                    'id'               => $cycle_date->id,
-                    'title'            => $name,
-                    'start'            => $start,
-                    'end'              => $end,
-                    'textColor'        => $textcolor,
-                    'backgroundColor'  => $backgroundcolor,
-                    'borderColor'      => '#000',
-                    'editable'         => $is_editable,
-                    'startEditable'    => $is_start_editable,
-                    'durationEditable' => $is_duration_editable,
-                    'resourceEditable' => true,
-                    'studip_api_urls'  => ['move' => $move_url],
-                    'studip_view_urls' => ['edit' => URLHelper::getURL('dispatch.php/course/details/index/' . $cycle_date->seminar_id)],
-                    'metadate_id'      => $cycle_date->metadate_id,
-                    'course_id'        => $cycle_date->seminar_id,
-                    'tooltip'          => self::getCycleInfos($course, $cycle_date),
-                    'icon'             => $is_start_editable ? '' : 'lock-locked',
-                    'conform'          => $conform,
-                ];
-            }
-        }, array_keys($courses));
-
-        return $events;
-    }
-
-    /**
-     * Creates a fullcalendar event of given SeminarCycleDate
-     *
-     * @param SeminarCycleDate $cycle_date
-     * @param string $institut_id
-     *
-     * @return string enriched course info string for tooltip
-     */
-    public static function getCycleEvent($cycle_date, $institut_id)
-    {
-        $course = Course::find($cycle_date->seminar_id);
-        $semtype = $course->getSemType();
-        $institut = Institute::find($institut_id);
-        $inst_default_colors = self::getInstituteDefaultEventcolors($institut);
-
-        $today = date('w');
-        $user_insts = array_map(function ($arr) {
-            return $arr['Institut_id'];
-        }, Institute::getMyInstitutes($GLOBALS['user']->id));
-
-        $min_time = explode(':', Config::get()->INSTITUTE_COURSE_PLAN_START_HOUR);
-        $minbigtime = (int) $min_time[0];
-        $max_time = explode(':', Config::get()->INSTITUTE_COURSE_PLAN_END_HOUR);
-        $maxbigtime = (int) $max_time[0];
-
-        $start_time = explode(':', $cycle_date['start_time']);
-        $bigtime = (int) $start_time[0];
-
-        if ($bigtime > $maxbigtime || $bigtime < $minbigtime) {
-            return null;
-        } elseif ($bigtime % 2) {
-            $bigtime--;
-        }
-        $start_time = $bigtime . ':00:00';
-
-        $end_time = explode(':', $start_time);
-        $end_time[0] += 2;
-        $end_time = implode(':', $end_time);
-
-        if (in_array($course->institut_id, $user_insts)) {
-            $is_editable = true;
-            $is_start_editable = !LockRules::Check($cycle_date->seminar_id, 'room_time');
-            $is_duration_editable = false;
-        } else {
-            $is_editable = false;
-            $is_start_editable = false;
-            $is_duration_editable = false;
-        }
-
-        if ($cycle_date['weekday'] == 0) {
-            $day_offset = (7 - $today);
-        } else {
-            $day_offset = ($cycle_date['weekday'] - $today);
-        }
-
-        $event_columns = self::getCourseEventcolumns($course);
-        $event_colors = self::getCourseEventcolors($course);
-
-        $move_url = URLHelper::getURL('dispatch.php/admin/courseplanning/move_event');
-        $name = $course->getFullName('number-name');
-
-        if ($start_time != $cycle_date['start_time'] && $end_time != $cycle_date['end_time']) {
-            $start = self::iso8601date(strtotime($day_offset . ' days'), $cycle_date['start_time']);
-            $end = self::iso8601date(strtotime($day_offset . ' days'), $cycle_date['end_time']);
-            $backgroundcolor = '#6c737a';
-            $textcolor = '#ffffff';
-        } else {
-            $start = self::iso8601date(strtotime($day_offset . ' days'), $start_time);
-            $end = self::iso8601date(strtotime($day_offset . ' days'), $end_time);
-
-            $backgroundcolor = null;
-            if (array_key_exists($cycle_date->id, $event_colors)) {
-                if (is_array($event_colors[$cycle_date->id]) && array_key_exists($institut_id, $event_colors[$cycle_date->id])) {
-                    $backgroundcolor = $event_colors[$cycle_date->id][$institut_id];
-                }
-            }
-            if (!$backgroundcolor) {
-                $backgroundcolor = array_key_exists($semtype['name'], $inst_default_colors)?$inst_default_colors[$semtype['name']]:self::DEFAULT_EVENT_COLOR;
-            }
-
-            $textcolor = '#ffffff';
-            if (self::calculateLuminosityRatio($backgroundcolor, $textcolor) < 3) {
-                $textcolor = '#000000';
-            }
-        }
-        if (!$is_editable) {
-            $backgroundcolor = '#c4c7c9';
-            $textcolor = '#000000';
-        }
-
-        $resource_column = '0';
-        if (array_key_exists($cycle_date->id, $event_columns)) {
-            if (is_array($event_columns[$cycle_date->id]) && array_key_exists($institut_id, $event_columns[$cycle_date->id])) {
-                $resource_column = $event_columns[$cycle_date->id][$institut_id];
-            }
-        }
-
-        return [
-            'resourceId'       => $resource_column,
-            'id'               => $cycle_date->id,
-            'title'            => $name,
-            'start'            => $start,
-            'end'              => $end,
-            'textColor'        => $textcolor,
-            'backgroundColor'  => $backgroundcolor,
-            'borderColor'      => '#000',
-            'editable'         => $is_editable,
-            'startEditable'    => $is_start_editable,
-            'durationEditable' => $is_duration_editable,
-            'resourceEditable' => true,
-            'studip_api_urls'  => ['move' => $move_url],
-            'studip_view_urls' => ['edit' => URLHelper::getURL('dispatch.php/course/details/index/' . $cycle_date->seminar_id)],
-            'metadate_id'      => $cycle_date->metadate_id,
-            'course_id'        => $cycle_date->seminar_id,
-            'tooltip'          => self::getCycleInfos($course, $cycle_date),
-            'icon'             => $is_start_editable ? '' : 'lock-locked'
-        ];
-    }
-
-    /**
-     * Creates a string with course infos to be displayed as a tooltip in calendar events
-     *
-     * @param SeminarCycleDate $cycle_date
-     *
-     * @return string enriched course info string for tooltip
-     */
-    private static function getCycleInfos($course, $cycle_date)
-    {
-        $info_string = '';
-
-        $info_string .= $course->getFullName('number-name') . "\n";
-
-        $dozenten = [];
-        foreach (CourseMember::findByCourseAndStatus($course->id, 'dozent') as $cmember) {
-            $dozenten[$cmember->user->user_id] = $cmember->user->getFullName();
-        }
-        if ($dozenten) {
-            $info_string .= implode(', ', $dozenten) . "\n";
-        }
-
-        $rooms = [];
-        foreach ($cycle_date->getAllDates() as $course_date) {
-            $room = $course_date->getRoom();
-            if ($room) {
-                $rooms[$room->id] = $room->name;
-            }
-        }
-        if ($rooms) {
-            $info_string .= implode(', ', $rooms) . "\n";
-        }
-
-        if ($course->getSemClass()->offsetGet('module')) {
-            $mvv_pathes = [];
-            $course_start = $course->start_time;
-            $course_end = ($course->end_time < 0 || is_null($course->end_time))
-                        ? PHP_INT_MAX
-                        : $course->end_time;
-            // set filter to show only pathes with valid semester data
-            ModuleManagementModelTreeItem::setObjectFilter('Modul',
-                function ($modul) use ($course_start, $course_end) {
-                    // check for public status
-                    if (!$GLOBALS['MVV_MODUL']['STATUS']['values'][$modul->stat]['public']) {
-                        return false;
-                    }
-                    $modul_start = Semester::find($modul->start)->beginn ?: 0;
-                    $modul_end = Semester::find($modul->end)->ende ?: PHP_INT_MAX;
-                    return ($modul_start <= $course_end && $modul_end >= $course_start);
-                }
-            );
-
-            ModuleManagementModelTreeItem::setObjectFilter('StgteilVersion',
-                function ($version) {
-                    return (bool) $GLOBALS['MVV_STGTEILVERSION']['STATUS']['values'][$version->stat]['public'];
-                }
-            );
-
-            $trail_classes = ['Modulteil', 'StgteilabschnittModul', 'StgteilAbschnitt', 'StgteilVersion'];
-            $mvv_object_pathes = MvvCourse::get($course->getId())->getTrails($trail_classes);
-            if ($mvv_object_pathes) {
-                if (Config::get()->COURSE_SEM_TREE_DISPLAY) {
-                    $mvv_tree = [];
-                    foreach ($mvv_object_pathes as $mvv_object_path) {
-                        // show only complete pathes
-                        if (count($mvv_object_path) == 4) {
-                            // flatten the pathes to a linked list
-                            $stg = reset($mvv_object_path);
-                            $parent_id = 'root';
-                            foreach ($mvv_object_path as $mvv_object) {
-                                $mvv_object_id = $mvv_object instanceof StgteilabschnittModul
-                                        ? $mvv_object->modul_id
-                                        : $mvv_object->id;
-                                $mvv_tree[$parent_id][$mvv_object_id] = [
-                                    'id'    => $mvv_object_id,
-                                    'name'  => $mvv_object->getDisplayName(),
-                                    'class' => get_class($mvv_object),
-                                 ];
-                                $parent_id = $mvv_object_id;
-                            }
-                        }
-                    }
-                    if (count($mvv_tree)) {
-                        // add the root node
-                        $mvv_tree['start'][] = [
-                            'id'    => 'root',
-                            'name'  => Config::get()->UNI_NAME_CLEAN,
-                            'class' => ''
-                        ];
-                    }
-                } else {
-                    foreach ($mvv_object_pathes as $mvv_object_path) {
-                        // show only complete pathes
-                        if (count($mvv_object_path) == 4) {
-                            $mvv_object_names = [];
-                            $modul_id = '';
-                            foreach ($mvv_object_path as $mvv_object) {
-                                if ($mvv_object instanceof StgteilabschnittModul) {
-                                    $modul_id = $mvv_object->modul_id;
-                                }
-                                $mvv_object_names[] = $mvv_object->getDisplayName();
-                            }
-                            $mvv_pathes[] = [$modul_id => $mvv_object_names];
-                        }
-                    }
-                }
-                // to prevent collisions of object ids in the tree
-                // in the case of same objects listed in more than one part
-                // of the tree
-                $id_sfx = new stdClass();
-                $id_sfx->c = 1;
-            }
-            foreach ($mvv_pathes as $mvv_path) {
-                foreach ($mvv_path as $mvv_path_content) {
-                    $info_string .= implode(' > ', $mvv_path_content) . "\n";
-                }
-            }
-        }
-
-        return $info_string;
-    }
-
-    public static function getBackgroundEvents($start = null)
-    {
-        $datetime = new DateTime();
-        $slot_duration = 1;
-        $start_time = 8;
-        $end_time = 16;
-        $events = [];
-        $day_interval = 1;
-
-        if ($start == null) {
-            $datetime->modify('monday this week');
-            $datetime->add(new DateInterval('PT' . $start_time . 'H'));
-            $day_interval = 7;
-        }
-
-        for ($i = 1; $i <= $day_interval; $i++) {
-            for ($slot = $start_time; $slot < $end_time; $slot += $slot_duration) {
-                if ($slot % 2) {
-                    $datetime->setTime($slot, 0);
-                    $events[] = [
-                        'start'     => self::iso8601date($datetime, $slot),
-                        'end'       => self::iso8601date($datetime, $slot + $slot_duration),
-                        'rendering' => 'background',
-                    ];
-
-                }
-            }
-            $datetime->setTime($start_time, 0);
-            $datetime->add(new DateInterval('P1D'));
-        };
-        return $events;
-    }
-
-    private static function iso8601date($date, $time = '00:00:00', $timezone = '+00:00')
-    {
-        // If only date parameter is passed and is a DateTimeInterface object or
-        // unix timestamp, assume time from date
-        if (func_num_args() === 1 && ($date instanceof DateTimeInterface || ctype_digit($date))) {
-            $time = $date;
-        }
-
-        // Get time
-        if ($time instanceof DateTimeInterface) {
-            $time = $time->format('H:i:s');
-        } elseif (ctype_digit($time)) {
-            $time = date('H:i:s', $time);
-        } elseif (sscanf($time, '%u:%u:%u', $hours, $minutes, $seconds)) {
-            $time = sprintf('%02u:%02u:%02u', $hours, $minutes, $seconds);
-        }
-
-        // Get date
-        if ($date instanceof DateTimeInterface) {
-            $date = $date->format('Y-m-d');
-        } elseif (ctype_digit($date)) {
-            $date = date('Y-m-d', $date);
-        }
-
-        return "{$date}T{$time}{$timezone}";
-    }
-
-
-    // calculates the luminosity of an given RGB color
-    // the color code must be in the format of RRGGBB
-    // the luminosity equations are from the WCAG 2 requirements
-    // http://www.w3.org/TR/WCAG20/#relativeluminancedef
-    private static function calculateLuminosity($color)
-    {
-        $r = hexdec(substr($color, 0, 2)) / 255; // red value
-        $g = hexdec(substr($color, 2, 2)) / 255; // green value
-        $b = hexdec(substr($color, 4, 2)) / 255; // blue value
-        if ($r <= 0.03928) {
-            $r = $r / 12.92;
-        } else {
-            $r = pow(($r + 0.055) / 1.055, 2.4);
-        }
-        if ($g <= 0.03928) {
-            $g = $g / 12.92;
-        } else {
-            $g = pow(($g + 0.055) / 1.055, 2.4);
-        }
-        if ($b <= 0.03928) {
-            $b = $b / 12.92;
-        } else {
-            $b = pow(($b + 0.055) / 1.055, 2.4);
-        }
-        $luminosity = 0.2126 * $r + 0.7152 * $g + 0.0722 * $b;
-        return $luminosity;
-    }
-
-    // calculates the luminosity ratio of two colors
-    // the luminosity ratio equations are from the WCAG 2 requirements
-    // http://www.w3.org/TR/WCAG20/#contrast-ratiodef
-    private static function calculateLuminosityRatio($color1, $color2)
-    {
-        $c1 = ltrim($color1, '#');
-        $c2 = ltrim($color2, '#');
-        $l1 = self::calculateLuminosity($c1);
-        $l2 = self::calculateLuminosity($c2);
-        if ($l1 > $l2) {
-            $ratio = ($l1 + 0.05) / ($l2 + 0.05);
-        } else {
-            $ratio = ($l2 + 0.05) / ($l1 + 0.05);
-        }
-        return $ratio;
-    }
-}