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

1 files changed, 1181 insertions, 0 deletions

diff --git a/lib/models/Course.php b/lib/models/Course.php
new file mode 100644
index 0000000..d8bb2f5
--- /dev/null
+++ b/lib/models/Course.php
@@ -0,0 +1,1181 @@
+<?php
+/**
+ * Course.php
+ * model class for table seminare
+ *
+ * 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      André Noack <noack@data-quest.de>
+ * @copyright   2012 Stud.IP Core-Group
+ * @license     http://www.gnu.org/licenses/gpl-2.0.html GPL version 2
+ * @category    Stud.IP
+ *
+ * @property string $id alias column for seminar_id
+ * @property string $seminar_id database column
+ * @property string|null $veranstaltungsnummer database column
+ * @property string $institut_id database column
+ * @property I18NString $name database column
+ * @property I18NString|null $untertitel database column
+ * @property int $status database column
+ * @property I18NString $beschreibung database column
+ * @property I18NString|null $ort database column
+ * @property string|null $sonstiges database column
+ * @property int $lesezugriff database column
+ * @property int $schreibzugriff database column
+ * @property int|null $start_time database column
+ * @property int|null $duration_time database column
+ * @property I18NString|null $art database column
+ * @property I18NString|null $teilnehmer database column
+ * @property I18NString|null $vorrausetzungen database column
+ * @property I18NString|null $lernorga database column
+ * @property I18NString|null $leistungsnachweis database column
+ * @property int $mkdate database column
+ * @property int $chdate database column
+ * @property string|null $ects database column
+ * @property int|null $admission_turnout database column
+ * @property int|null $admission_binding database column
+ * @property int $admission_prelim database column
+ * @property string|null $admission_prelim_txt database column
+ * @property int $admission_disable_waitlist database column
+ * @property int $visible database column
+ * @property int|null $showscore database column
+ * @property string|null $aux_lock_rule database column
+ * @property int $aux_lock_rule_forced database column
+ * @property string|null $lock_rule database column
+ * @property int $admission_waitlist_max database column
+ * @property int $admission_disable_waitlist_move database column
+ * @property int $completion database column
+ * @property string|null $parent_course database column
+ * @property SimpleORMapCollection|CourseTopic[] $topics has_many CourseTopic
+ * @property SimpleORMapCollection|CourseDate[] $dates has_many CourseDate
+ * @property SimpleORMapCollection|CourseExDate[] $ex_dates has_many CourseExDate
+ * @property SimpleORMapCollection|CourseMember[] $members has_many CourseMember
+ * @property SimpleORMapCollection|Deputy[] $deputies has_many Deputy
+ * @property SimpleORMapCollection|Statusgruppen[] $statusgruppen has_many Statusgruppen
+ * @property SimpleORMapCollection|AdmissionApplication[] $admission_applicants has_many AdmissionApplication
+ * @property SimpleORMapCollection|DatafieldEntryModel[] $datafields has_many DatafieldEntryModel
+ * @property SimpleORMapCollection|SeminarCycleDate[] $cycles has_many SeminarCycleDate
+ * @property SimpleORMapCollection|BlubberThread[] $blubberthreads has_many BlubberThread
+ * @property SimpleORMapCollection|ConsultationBlock[] $consultation_blocks has_many ConsultationBlock
+ * @property SimpleORMapCollection|RoomRequest[] $room_requests has_many RoomRequest
+ * @property SimpleORMapCollection|Course[] $children has_many Course
+ * @property SimpleORMapCollection|ToolActivation[] $tools has_many ToolActivation
+ * @property SimpleORMapCollection|CourseMemberNotification[] $member_notifications has_many CourseMemberNotification
+ * @property SimpleORMapCollection|Courseware\Unit[] $courseware_units has_many Courseware\Unit
+ * @property Institute $home_institut belongs_to Institute
+ * @property AuxLockRule|null $aux belongs_to AuxLockRule
+ * @property Course|null $parent belongs_to Course
+ * @property SimpleORMapCollection|Semester[] $semesters has_and_belongs_to_many Semester
+ * @property SimpleORMapCollection|StudipStudyArea[] $study_areas has_and_belongs_to_many StudipStudyArea
+ * @property SimpleORMapCollection|Institute[] $institutes has_and_belongs_to_many Institute
+ * @property SimpleORMapCollection|UserDomain[] $domains has_and_belongs_to_many UserDomain
+ * @property-read mixed $teachers additional field
+ * @property mixed $end_time additional field
+ * @property mixed $start_semester additional field
+ * @property mixed $end_semester additional field
+ * @property-read mixed $semester_text additional field
+ * @property-read mixed $config additional field
+ */
+
+class Course extends SimpleORMap implements Range, PrivacyObject, StudipItem, FeedbackRange, Studip\Calendar\Owner
+{
+    protected static function configure($config = [])
+    {
+        $config['db_table'] = 'seminare';
+        $config['has_many']['topics'] = [
+            'class_name' => CourseTopic::class,
+            'on_delete'  => 'delete',
+            'on_store'   => 'store',
+        ];
+        $config['has_many']['dates'] = [
+            'class_name'        => CourseDate::class,
+            'assoc_foreign_key' => 'range_id',
+            'on_delete'         => 'delete',
+            'on_store'          => 'store',
+            'order_by'          => 'ORDER BY date'
+        ];
+        $config['has_many']['ex_dates'] = [
+            'class_name'        => CourseExDate::class,
+            'assoc_foreign_key' => 'range_id',
+            'on_delete'         => 'delete',
+            'on_store'          => 'store',
+        ];
+        $config['has_many']['members'] = [
+            'class_name' => CourseMember::class,
+            'assoc_func' => 'findByCourse',
+            'on_delete'  => 'delete',
+            'on_store'   => 'store',
+        ];
+        $config['has_many']['deputies'] = [
+            'class_name' => Deputy::class,
+            'assoc_func' => 'findByRange_id',
+            'on_delete'  => 'delete',
+            'on_store'   => 'store',
+        ];
+        $config['has_many']['statusgruppen'] = [
+            'class_name' => Statusgruppen::class,
+            'on_delete'  => 'delete',
+            'on_store'   => 'store',
+        ];
+        $config['has_many']['admission_applicants'] = [
+            'class_name' => AdmissionApplication::class,
+            'assoc_func' => 'findByCourse',
+            'on_delete'  => 'delete',
+            'on_store'   => 'store',
+        ];
+        $config['has_many']['datafields'] = [
+            'class_name' => DatafieldEntryModel::class,
+            'assoc_func' => 'findByModel',
+            'assoc_foreign_key' => function ($model, $params) {
+                $model->setValue('range_id', $params[0]->id);
+            },
+            'foreign_key' => function ($course) {
+                return [$course];
+            },
+            'on_delete' => 'delete',
+            'on_store'  => 'store',
+        ];
+        $config['has_many']['cycles'] = [
+            'class_name' => SeminarCycleDate::class,
+            'assoc_func' => 'findBySeminar',
+            'on_delete'  => 'delete',
+            'on_store'   => 'store',
+        ];
+        $config['has_many']['blubberthreads'] = [
+            'class_name' => BlubberThread::class,
+            'assoc_func' => 'findBySeminar',
+            'on_delete'  => 'delete',
+            'on_store'   => 'store',
+        ];
+        $config['has_many']['consultation_blocks'] = [
+            'class_name'        => ConsultationBlock::class,
+            'assoc_foreign_key' => 'range_id',
+            'on_delete'         => 'delete',
+        ];
+
+        $config['has_and_belongs_to_many']['semesters'] = [
+            'class_name'     => Semester::class,
+            'thru_table'     => 'semester_courses',
+            'thru_key'       => 'course_id',
+            'thru_assoc_key' => 'semester_id',
+            'order_by'       => 'ORDER BY beginn ASC',
+            'on_delete'      => 'delete',
+            'on_store'       => 'store',
+        ];
+
+        $config['belongs_to']['home_institut'] = [
+            'class_name' => Institute::class,
+            'foreign_key' => 'institut_id',
+            'assoc_func'  => 'find',
+        ];
+        $config['belongs_to']['aux'] = [
+            'class_name' => AuxLockRule::class,
+            'foreign_key' => 'aux_lock_rule',
+        ];
+        $config['has_and_belongs_to_many']['study_areas'] = [
+            'class_name' => StudipStudyArea::class,
+            'thru_table' => 'seminar_sem_tree',
+            'on_delete'  => 'delete',
+            'on_store'   => 'store',
+        ];
+        $config['has_and_belongs_to_many']['institutes'] = [
+            'class_name' => Institute::class,
+            'thru_table' => 'seminar_inst',
+            'on_delete'  => 'delete',
+            'on_store'   => 'store',
+        ];
+
+        $config['has_and_belongs_to_many']['domains'] = [
+            'class_name'        => UserDomain::class,
+            'thru_table'        => 'seminar_userdomains',
+            'on_delete'          => 'delete',
+            'on_store'           => 'store',
+            'order_by'          => 'ORDER BY name',
+        ];
+
+        $config['has_many']['room_requests'] = [
+            'class_name'        => RoomRequest::class,
+            'assoc_foreign_key' => 'course_id',
+            'on_delete'         => 'delete',
+        ];
+        $config['belongs_to']['parent'] = [
+            'class_name' => Course::class,
+            'foreign_key' => 'parent_course'
+        ];
+        $config['has_many']['children'] = [
+            'class_name'        => Course::class,
+            'assoc_foreign_key' => 'parent_course',
+            'order_by'          => 'GROUP BY seminar_id ORDER BY VeranstaltungsNummer, Name'
+        ];
+        $config['has_many']['tools'] = [
+            'class_name'        => ToolActivation::class,
+            'assoc_foreign_key' => 'range_id',
+            'order_by'          => 'ORDER BY position',
+            'on_delete'         => 'delete',
+        ];
+        $config['has_many']['member_notifications'] = [
+            'class_name'        => CourseMemberNotification::class,
+            'on_delete'         => 'delete',
+        ];
+
+        $config['has_many']['courseware_units'] = [
+            'class_name' => \Courseware\Unit::class,
+            'assoc_foreign_key' => 'range_id',
+            'on_delete'  => 'delete',
+        ];
+
+        $config['default_values']['lesezugriff'] = 1;
+        $config['default_values']['schreibzugriff'] = 1;
+        $config['default_values']['duration_time'] = 0;
+
+        $config['additional_fields']['teachers'] = [
+            'get' => 'getTeachers'
+        ];
+        $config['additional_fields']['end_time'] = true;
+
+        $config['additional_fields']['start_semester'] = [
+            'get' => 'getStartSemester',
+            'set' => '_set_semester'
+        ];
+        $config['additional_fields']['end_semester'] = [
+            'get' => 'getEndSemester',
+            'set' => '_set_semester'
+        ];
+        $config['additional_fields']['semester_text'] = [
+            'get' => 'getTextualSemester'
+        ];
+
+        $config['additional_fields']['config'] = [
+            'get' => function (Course $course) {
+                return $course->getConfiguration();
+            }
+        ];
+
+        $config['notification_map']['after_create'] = 'CourseDidCreateOrUpdate';
+        $config['notification_map']['after_store'] = 'CourseDidCreateOrUpdate';
+
+        $config['i18n_fields']['name'] = true;
+        $config['i18n_fields']['untertitel'] = true;
+        $config['i18n_fields']['beschreibung'] = true;
+        $config['i18n_fields']['art'] = true;
+        $config['i18n_fields']['teilnehmer'] = true;
+        $config['i18n_fields']['vorrausetzungen'] = true;
+        $config['i18n_fields']['lernorga'] = true;
+        $config['i18n_fields']['leistungsnachweis'] = true;
+        $config['i18n_fields']['ort'] = true;
+
+        $config['registered_callbacks']['before_update'][] = 'logStore';
+        $config['registered_callbacks']['before_store'][] = 'cbSetStartAndDurationTime';
+        $config['registered_callbacks']['after_create'][] = 'setDefaultTools';
+        $config['registered_callbacks']['after_delete'][] = function ($course) {
+            CourseAvatar::getAvatar($course->id)->reset();
+            FeedbackElement::deleteBySQL('course_id = ?', [$course->id]);
+            // Remove subcourse relations, leaving subcourses intact.
+            DBManager::get()->execute(
+                "UPDATE `seminare` SET `parent_course` = NULL WHERE `parent_course` = :course",
+                ['course' => $course->id]
+            );
+            DBManager::get()->execute(
+                "DELETE FROM `forum_visits` WHERE `seminar_id` = ?",
+                [$course->id]
+            );
+        };
+
+        parent::configure($config);
+    }
+
+
+    /**
+     * Returns the currently active course or false if none is active.
+     *
+     * @return Course object of currently active course, null otherwise
+     * @since 3.0
+     */
+    public static function findCurrent()
+    {
+        if (Context::isCourse()) {
+            return Context::get();
+        }
+
+        return null;
+    }
+
+    /**
+     * Returns the associated mvv modules for a given course id.
+     *
+     * @param string     $course_id
+     * @param array|null $statusses Limit the results by a given module status
+     * @return Modul[]
+     */
+    public static function getMVVModulesForCourseId(string $course_id, ?array $statusses = null): array
+    {
+        $query = "SELECT mvv_modul.*
+                  FROM mvv_lvgruppe_seminar
+                  JOIN `mvv_lvgruppe` ON (`mvv_lvgruppe_seminar`.`lvgruppe_id` = `mvv_lvgruppe`.`lvgruppe_id`)
+                  JOIN `mvv_lvgruppe_modulteil` ON (`mvv_lvgruppe_seminar`.`lvgruppe_id` = `mvv_lvgruppe_modulteil`.`lvgruppe_id`)
+                  JOIN `mvv_modulteil` ON (`mvv_lvgruppe_modulteil`.`modulteil_id` = `mvv_modulteil`.`modulteil_id`)
+                  JOIN `mvv_modul` ON (`mvv_modulteil`.`modul_id` = `mvv_modul`.`modul_id`)
+                  WHERE seminar_id = ?";
+        $parameters = [$course_id];
+
+        if ($statusses !== null) {
+            $query .= ' AND `mvv_modul`.`stat` IN (?)';
+            $parameters[] = $statusses;
+        }
+
+        return DBManager::get()->fetchAll($query, $parameters, function ($row) {
+            return Modul::buildExisting($row);
+        });
+    }
+
+    public function getEnd_Time()
+    {
+        return $this->duration_time == -1 ? -1 : $this->start_time + $this->duration_time;
+    }
+
+    public function setEnd_Time($value)
+    {
+        if ($value == -1) {
+            $this->duration_time = -1;
+        } elseif ($this->start_time > 0 && $value > $this->start_time) {
+            $this->duration_time = $value - $this->start_time;
+        } else {
+            $this->duration_time = 0;
+        }
+    }
+
+    public function _set_semester($field, $value)
+    {
+        $method = 'set' . ($field === 'start_semester' ? 'StartSemester' : 'EndSemester');
+        $this->$method($value);
+    }
+
+    /**
+     * @param Semester $semester
+     */
+    public function setStartSemester(Semester $semester)
+    {
+        $end_semester = $this->semesters->last();
+        $start_semester = $this->semesters->first();
+        if ($start_semester && $start_semester->id === $semester->id) {
+            return;
+        }
+        if ($end_semester) {
+            if (count($this->semesters) > 1 && $end_semester->beginn < $semester->beginn) {
+                throw new InvalidArgumentException('start-semester must start before end-semester');
+            }
+            foreach ($this->semesters as $key => $one_semester) {
+                if ($one_semester->beginn < $semester->beginn) {
+                    $this->semesters->offsetUnset($key);
+                }
+            }
+        }
+        $this->semesters[] = $semester;
+        $this->semesters->orderBy('beginn asc');
+        //add possibly missing semesters between start_semester and end_semester
+        if (count($this->semesters) > 1 && $semester->beginn < $start_semester->beginn) {
+            $this->setEndSemester($end_semester);
+        }
+    }
+
+    /**
+     * @param Semester|null $semester
+     */
+    public function setEndSemester(?Semester $semester)
+    {
+        $end_semester = $this->semesters->last();
+        $start_semester = $this->semesters->first();
+        if (
+            (is_null($end_semester) && is_null($semester))
+            || ($end_semester && $semester && $end_semester->id === $semester->id)) {
+            return;
+        }
+        if ($start_semester) {
+            if ($semester && $start_semester->beginn > $semester->beginn) {
+                throw new InvalidArgumentException('end-semester must start after start-semester');
+            }
+            $this->semesters = [];
+            if ($semester) {
+                $all_semester = SimpleCollection::createFromArray(Semester::getAll());
+                $this->semesters = $all_semester->findBy('beginn', [$start_semester->beginn, $semester->beginn], '>=<=');
+            }
+        } else {
+            if ($semester) {
+                $this->semesters[] = $semester;
+            }
+        }
+    }
+
+    /**
+     * Retrieves the first semester of a course, if applicable.
+     *
+     * @returns Semester|null Either the first semester of the course
+     *     or null, if no semester could be found.
+     */
+    public function getStartSemester()
+    {
+        if (count($this->semesters) > 0) {
+            return $this->semesters->first();
+        } else {
+            return Semester::findCurrent();
+        }
+    }
+
+    /**
+     * Retrieves the last semester of a course, if applicable.
+     *
+     * @returns Semester|null Either the last semester of the course
+     *     or null, if no semester could be found.
+     */
+    public function getEndSemester()
+    {
+        if (count($this->semesters) > 0) {
+            return $this->semesters->last();
+        }
+    }
+
+    /**
+     * Returns the readable semester duration as as string
+     * @return string : readable semester
+     */
+    public function getTextualSemester()
+    {
+        if (count($this->semesters) > 1) {
+            return $this->start_semester->short_name . ' - ' . $this->end_semester->short_name;
+        } elseif (count($this->semesters) === 1) {
+            return $this->start_semester->short_name;
+        } else {
+            return _('unbegrenzt');
+        }
+    }
+
+    /**
+     * Returns true if this course has no end-semester. Else false.
+     * @return bool : true if there is no end-semester
+     */
+    public function isOpenEnded()
+    {
+        return count($this->semesters) === 0;
+    }
+
+    /**
+     * Returns if this course is in the given semester
+     * @param Semester $semester : instance of the given semester
+     * @return bool : true if this course is part of this semester
+     */
+    public function isInSemester(Semester $semester)
+    {
+        if (count($this->semesters) > 0) {
+            foreach ($this->semesters as $s) {
+                if ($s->id === $semester->id) {
+                    return true;
+                }
+            }
+            return false;
+        } else {
+            return true;
+        }
+    }
+
+    public function getTeachers()
+    {
+        return $this->members->filter(function ($m) {
+            return $m['status'] === 'dozent';
+        });
+    }
+
+    public function getFreeSeats()
+    {
+        $free_seats = $this->admission_turnout - $this->getNumParticipants();
+        return max($free_seats, 0);
+    }
+
+    public function isWaitlistAvailable()
+    {
+        if ($this->admission_disable_waitlist) {
+            return false;
+        }
+
+        if ($this->admission_waitlist_max) {
+            return $this->admission_waitlist_max - $this->getNumWaiting() > 0;
+        }
+
+        return true;
+    }
+
+    /**
+     * Retrieves all members of a status
+     *
+     * @param String|Array $status        the status to filter with
+     * @param bool         $as_collection return collection instead of array?
+     * @return Array|SimpleCollection an array of all those members.
+     */
+    public function getMembersWithStatus($status, $as_collection = false)
+    {
+        $result = CourseMember::findByCourseAndStatus($this->id, $status);
+        return $as_collection
+             ? SimpleCollection::createFromArray($result)
+             : $result;
+    }
+
+    /**
+     * Retrieves the number of all members of a status
+     *
+     * @param String|Array $status  the status to filter with
+     *
+     * @return int the number of all those members.
+     */
+    public function countMembersWithStatus($status)
+    {
+        return CourseMember::countByCourseAndStatus($this->id, $status);
+    }
+
+    public function getNumParticipants()
+    {
+        return $this->countMembersWithStatus('user autor') + $this->getNumPrelimParticipants();
+    }
+
+    public function getNumPrelimParticipants()
+    {
+        return AdmissionApplication::countBySql(
+            "seminar_id = ? AND status = 'accepted'",
+            [$this->id]
+        );
+    }
+
+    public function getNumWaiting()
+    {
+        return AdmissionApplication::countBySql(
+            "seminar_id = ? AND status = 'awaiting'",
+            [$this->id]
+        );
+    }
+
+    public function getParticipantStatus($user_id)
+    {
+        $p_status = $this->members->findBy('user_id', $user_id)->val('status');
+        if (!$p_status) {
+            $p_status = $this->admission_applicants->findBy('user_id', $user_id)->val('status');
+        }
+        return $p_status;
+    }
+
+    /**
+    * Returns the semType object that is defined for the course
+    *
+    * @return SemType The semTypeObject for the course
+    */
+    public function getSemType()
+    {
+        $semTypes = SemType::getTypes();
+        if (isset($semTypes[$this->status])) {
+            return $semTypes[$this->status];
+        }
+
+        Log::error(sprintf('SemType not found id:%s status:%s', $this->id, $this->status));
+        return new SemType(['name' => 'Fehlerhafter Veranstaltungstyp']);
+    }
+
+    /**
+     * Returns the SemClass object that is defined for the course
+     *
+     * @return SemClass The SemClassObject for the course
+     */
+     public function getSemClass()
+     {
+         return $this->getSemType()->getClass();
+     }
+
+    /**
+     * Returns the full name of a course. If the important course numbers
+     * (IMPORTANT_SEMNUMBER) is set in global configs it will also display
+     * the coursenumber
+     *
+     * @param string formatting template name
+     * @return string Fullname
+     */
+    public function getFullName($format = 'default')
+    {
+        $template = [
+            'name'                 => '%1$s',
+            'name-semester'        => '%1$s (%4$s)',
+            'number-name'          => '%3$s %1$s',
+            'number-name-semester' => '%3$s %1$s (%4$s)',
+            'number-type-name'     => '%3$s %2$s: %1$s',
+            'sem-duration-name'    => '%4$s',
+            'type-name'            => '%2$s: %1$s',
+            'type-number-name'     => '%2$s: %3$s %1$s',
+        ];
+
+        if ($format === 'default' || !isset($template[$format])) {
+           $format = Config::get()->IMPORTANT_SEMNUMBER ? 'type-number-name' : 'type-name';
+        }
+        $sem_type = $this->getSemType();
+        $data[0] = $this->name;
+        $data[1] = $sem_type['name'];
+        $data[2] = $this->veranstaltungsnummer;
+        $data[3] = $this->getTextualSemester();
+        return trim(vsprintf($template[$format], array_map('trim', $data)));
+    }
+
+
+    /**
+     * Retrieves the course dates including cancelled dates ("ex-dates").
+     * The dates can be filtered by an optional time range. By default,
+     * all dates are retrieved.
+     *
+     * @param int $range_begin The begin timestamp of the time range.
+     *
+     * @param int $range_end The end timestamp of the time range.
+     *
+     * @returns SimpleCollection A collection of all retrieved dates and
+     *     cancelled dates.
+     */
+    public function getDatesWithExdates($range_begin = 0, $range_end = 0)
+    {
+        $dates = [];
+        if (($range_begin > 0) && ($range_end > 0) && ($range_end > $range_begin)) {
+            $ex_dates = $this->ex_dates->findBy('content', '', '<>')
+                          ->findBy('date', $range_begin, '>=')
+                          ->findBy('end_time', $range_end, '<=');
+            $dates = $this->dates->findBy('date', $range_begin, '>=')
+                          ->findBy('end_time', $range_end, '<=');
+            $dates->merge($ex_dates);
+        } else {
+            $dates = $this->ex_dates->findBy('content', '', '<>');
+            $dates->merge($this->dates);
+        }
+        $dates->uasort(function($a, $b) {
+            return $a->date - $b->date
+                ?: strnatcasecmp($a->getRoomName(), $b->getRoomName());
+        });
+        return $dates;
+    }
+
+    /**
+     * Sets this courses study areas to the given values.
+     *
+     * @param array $ids the new study areas
+     * @return bool Changes successfully saved?
+     */
+    public function setStudyAreas($ids)
+    {
+        $old = $this->study_areas->pluck('sem_tree_id');
+        $added = array_diff($ids, $old);
+        $removed = array_diff($old, $ids);
+        $success = false;
+        if ($added || $removed) {
+
+            $this->study_areas = SimpleCollection::createFromArray(StudipStudyArea::findMany($ids));
+
+            if ($this->store()) {
+                NotificationCenter::postNotification('CourseDidChangeStudyArea', $this);
+                $success = true;
+
+                foreach ($added as $one) {
+                    StudipLog::log('SEM_ADD_STUDYAREA', $this->id, $one);
+
+                    $area = $this->study_areas->find($one);
+                    if ($area->isModule()) {
+                        NotificationCenter::postNotification(
+                            'CourseAddedToModule',
+                            $area,
+                            ['module_id' => $one, 'course_id' => $this->id]
+                        );
+                    }
+                }
+
+                foreach ($removed as $one) {
+                    StudipLog::log('SEM_DELETE_STUDYAREA', $this->id, $one);
+
+                    $area = StudipStudyArea::find($one);
+                    if ($area->isModule()) {
+                        NotificationCenter::postNotification(
+                            'CourseRemovedFromModule',
+                            $area,
+                            ['module_id' => $one, 'course_id' => $this->id]
+                        );
+                    }
+                }
+            }
+        }
+
+        return $success;
+    }
+
+    /**
+     * Is the current course visible for the current user?
+     * @param string $user_id
+     * @return bool Visible?
+     */
+    public function isVisibleForUser($user_id = null)
+    {
+        return $this->visible
+            || $GLOBALS['perm']->have_perm(Config::get()->SEM_VISIBILITY_PERM, $user_id)
+            || $GLOBALS['perm']->have_studip_perm('user', $this->id, $user_id);
+    }
+
+    /**
+     * Returns a descriptive text for the range type.
+     *
+     * @return string
+     */
+    public function describeRange()
+    {
+        return _('Veranstaltung');
+    }
+
+    /**
+     * Returns a unique identificator for the range type.
+     *
+     * @return string
+     */
+    public function getRangeType()
+    {
+        return 'course';
+    }
+
+    /**
+     * Returns the id of the current range
+     *
+     * @return string
+     */
+    public function getRangeId()
+    {
+        return $this->id;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getConfiguration()
+    {
+        return CourseConfig::get($this);
+    }
+
+    /**
+     * Decides whether the user may access the range.
+     *
+     * @param string|null $user_id Optional id of a user, defaults to current user
+     * @return bool
+     * @todo Check permissions
+     */
+    public function isAccessibleToUser($user_id = null)
+    {
+        if ($user_id === null) {
+            $user_id = $GLOBALS['user']->id;
+        }
+        return $GLOBALS['perm']->have_studip_perm('user', $this->id, $user_id);
+    }
+
+    /**
+     * Decides whether the user may edit/alter the range.
+     *
+     * @param string|null $user_id Optional id of a user, defaults to current user
+     * @return bool
+     * @todo Check permissions
+     */
+    public function isEditableByUser($user_id = null)
+    {
+        if ($user_id === null) {
+            $user_id = $GLOBALS['user']->id;
+        }
+        return $GLOBALS['perm']->have_studip_perm('tutor', $this->id, $user_id);
+    }
+
+    /**
+     * Returns the appropriate icon for the completion status.
+     *
+     * Mapping (completion -> icon role):
+     * - 0 => status-red
+     * - 1 => status-yellow
+     * - 2 => status-green
+     *
+     * @return Icon class
+     */
+    public function getCompletionIcon()
+    {
+        $role = Icon::ROLE_STATUS_RED;
+        if ($this->completion == 1) {
+            $role = Icon::ROLE_STATUS_YELLOW;
+        } elseif ($this->completion == 2) {
+            $role = Icon::ROLE_STATUS_GREEN;
+        }
+        return Icon::create('radiobutton-checked', $role);
+    }
+
+    /**
+     * Returns the appropriate label for the completion status.
+     *
+     * @return string
+     */
+    public function getCompetionLabel(): string
+    {
+        return [
+            0 => _('unvollständig'),
+            1 => _('in Bearbeitung'),
+            2 => _('fertig'),
+        ][$this->completion] ?? _('undefiniert');
+    }
+
+    /**
+     * Generates a general log entry if the course were changed.
+     * Furthermore, this method emits notifications when the
+     * start and/or the end semester has/have changed.
+     */
+    protected function logStore()
+    {
+        if ($this->isFieldDirty('start_time')) {
+            //Log change of start semester:
+            StudipLog::log('SEM_SET_STARTSEMESTER', $this->id, isset($this->start_semester) ? $this->start_semester->name : _('unbegrenzt'));
+            NotificationCenter::postNotification('CourseDidChangeSchedule', $this);
+        }
+        if ($this->isFieldDirty('duration_time')) {
+            StudipLog::log('SEM_SET_ENDSEMESTER', $this->id, $this->getTextualSemester());
+            NotificationCenter::postNotification('CourseDidChangeSchedule', $this);
+        }
+
+        $log = [];
+        if ($this->isFieldDirty('admission_prelim')) {
+            $log[] = $this->admission_prelim ?  _('Neuer Anmeldemodus: Vorläufiger Eintrag') : _('Neuer Anmeldemodus: Direkter Eintrag');
+        }
+
+        if ($this->isFieldDirty('admission_binding')) {
+            $log[] = $this->admission_binding? _('Anmeldung verbindlich') : _('Anmeldung unverbindlich');
+        }
+
+        if ($this->isFieldDirty('admission_turnout')) {
+            $log[] = sprintf(_('Neue Teilnehmerzahl: %s'), (int)$this->admission_turnout);
+        }
+
+        if ($this->isFieldDirty('admission_disable_waitlist')) {
+            $log[] = $this->admission_disable_waitlist ? _('Warteliste aktiviert') : _('Warteliste deaktiviert');
+        }
+
+        if ($this->isFieldDirty('admission_waitlist_max')) {
+            $log[] = sprintf(_('Plätze auf der Warteliste geändert: %u'), (int)$this->admission_waitlist_max);
+        }
+
+        if ($this->isFieldDirty('admission_disable_waitlist_move')) {
+            $log[] = $this->admission_disable_waitlist ? _('Nachrücken aktiviert') : _('Nachrücken deaktiviert');
+        }
+
+        if ($this->isFieldDirty('admission_prelim_txt')) {
+            if ($this->admission_prelim_txt) {
+                $log[] = sprintf(_('Neuer Hinweistext bei vorläufigen Eintragungen: %s'), strip_tags(kill_format($this->admission_prelim_txt)));
+            } else {
+                $log[] = _('Hinweistext bei vorläufigen Eintragungen wurde entfert');
+            }
+        }
+
+        if (!empty($log)) {
+            StudipLog::log(
+                'SEM_CHANGED_ACCESS',
+                $this->id,
+                null,
+                '',
+                implode(' - ', $log)
+            );
+        }
+
+        if ($this->isFieldDirty('visible')) {
+            StudipLog::log($this->visible ? 'SEM_VISIBLE' : 'SEM_INVISIBLE', $this->id);
+        }
+    }
+
+    /**
+     * Called directly before storing the object to edit the columns start_time and duration_time
+     * which are both deprecated but are still in use for older plugins.
+     */
+    public function cbSetStartAndDurationTime()
+    {
+        if ($this->isFieldDirty('start_time')) {
+            $this->setStartSemester(Semester::findByTimestamp($this->start_time));
+        }
+        if ($this->isFieldDirty('duration_time')) {
+            $this->setEndSemester($this->duration_time == -1 ? null : Semester::findByTimestamp($this->start_time + $this->duration_time));
+        }
+        if ($this->isOpenEnded()) {
+            $this->start_time = $this->start_time ?: Semester::findCurrent()->beginn ?? time();
+            $this->duration_time = -1;
+        } else {
+            $this->start_time = $this->getStartSemester()->beginn;
+            $this->duration_time = $this->getEndSemester()->beginn - $this->start_time;
+        }
+    }
+
+
+    //StudipItem interface implementation:
+
+    public function getItemName($long_format = true)
+    {
+        if ($long_format) {
+            return $this->getFullName();
+        } else {
+            return $this->name;
+        }
+    }
+
+    public function getItemURL()
+    {
+        return URLHelper::getURL(
+            'dispatch.php/course/details/index',
+            [
+                'cid' => $this->id
+            ]
+        );
+    }
+
+    public function getItemAvatarURL()
+    {
+        $avatar = CourseAvatar::getAvatar($this->id);
+        if ($avatar) {
+            return $avatar->getURL(Avatar::NORMAL);
+        }
+        return '';
+    }
+
+
+    /**
+     * Export available data of a given user into a storage object
+     * (an instance of the StoredUserData class) for that user.
+     *
+     * @param StoredUserData $storage object to store data into
+     */
+    public static function exportUserData(StoredUserData $storage)
+    {
+        $sorm = self::findThru($storage->user_id, [
+            'thru_table'        => 'seminar_user',
+            'thru_key'          => 'user_id',
+            'thru_assoc_key'    => 'Seminar_id',
+            'assoc_foreign_key' => 'Seminar_id',
+        ]);
+        if ($sorm) {
+            $field_data = [];
+            foreach ($sorm as $row) {
+                $field_data[] = $row->toRawArray();
+            }
+            if ($field_data) {
+                $storage->addTabularData(_('Seminare'), 'seminare', $field_data);
+            }
+        }
+    }
+    public function getRangeName()
+    {
+        return $this->name;
+    }
+
+    public function getRangeIcon($role)
+    {
+        return Icon::create('seminar', $role);
+    }
+
+    public function getRangeUrl()
+    {
+        return 'course/overview';
+    }
+
+    public function getRangeCourseId()
+    {
+        return $this->Seminar_id;
+    }
+
+    public function isRangeAccessible(string $user_id = null): bool
+    {
+        $user_id = $user_id ?? $GLOBALS['user']->id;
+        return $GLOBALS['perm']->have_studip_perm('autor', $this->Seminar_id, $user_id);
+    }
+
+
+    public function getLink() : StudipLink
+    {
+        return new StudipLink($this->getItemURL(), $this->name, Icon::create('seminar'));
+    }
+
+
+    /**
+     * Returns a list of courses for the specified user.
+     * Permission levels may be supplied to limit the course list.
+     *
+     * @param string $user_id The ID of the user whose courses shall be retrieved.
+     *
+     * @param string[] $perms The permission levels of the user that shall be
+     *     regarded when retrieving courses.
+     *
+     * @param bool $with_deputies Whether to include courses where the user is
+     *     a deputy (true) or not (false). Defaults to true.
+     *
+     * @return Course[] A list of courses.
+     */
+    public static function findByUser($user_id, $perms = [], $with_deputies = true)
+    {
+        if (!$user_id) {
+            return [];
+        }
+
+        $db = DBManager::get();
+        $sql = "SELECT `seminar_id`
+                FROM `seminar_user`
+                WHERE `user_id` = :user_id";
+        $sql_params = ['user_id' => $user_id];
+        if (is_array($perms) && count($perms)) {
+            $sql .= ' AND `status` IN (:perms)';
+            $sql_params['perms'] = $perms;
+        }
+        $seminar_ids = $db->fetchFirst($sql, $sql_params);
+        if (Config::get()->DEPUTIES_ENABLE && $with_deputies) {
+            $sql = 'SELECT range_id FROM `deputies` WHERE `deputies`.`user_id` = :user_id';
+            $seminar_ids = array_merge($seminar_ids, $db->fetchFirst($sql, $sql_params));
+        }
+
+        $name_sort = Config::get()->IMPORTANT_SEMNUMBER ? 'VeranstaltungsNummer, Name' : 'Name';
+
+        return Course::findBySQL(
+            "LEFT JOIN semester_courses ON (semester_courses.course_id = seminare.Seminar_id)
+             WHERE Seminar_id IN (?)
+             GROUP BY seminare.Seminar_id
+             ORDER BY semester_courses.semester_id IS NULL DESC, start_time DESC, {$name_sort}",
+            [$seminar_ids]
+        );
+    }
+
+    /**
+     * Returns whether this course is a studygroup
+     * @return bool
+     */
+    public function isStudygroup()
+    {
+        return in_array($this->status, studygroup_sem_types());
+    }
+
+    /**
+     *
+     */
+    public function setDefaultTools()
+    {
+        $this->tools = [];
+        foreach (array_values($this->getSemClass()->getActivatedModuleObjects()) as $module) {
+            PluginManager::getInstance()->setPluginActivated($module->getPluginId(), $this->id, true);
+            $this->tools[] = ToolActivation::find([$this->id, $module->getPluginId()]);
+        }
+    }
+
+    /**
+     * @param $name string name of tool / plugin
+     * @return bool
+     */
+    public function isToolActive($name)
+    {
+        $plugin = PluginEngine::getPlugin($name);
+        return $plugin && $this->tools->findOneby('plugin_id', $plugin->getPluginId());
+    }
+
+    /**
+     * returns all activated plugins/modules for this course
+     * @return StudipModule[]
+     */
+    public function getActivatedTools()
+    {
+        return array_filter($this->tools->getStudipModule());
+    }
+
+    /**
+     * @see Range::__toString()
+     */
+    public function __toString() : string
+    {
+        return $this->getFullName();
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public static function getCalendarOwner(string $owner_id): ?\Studip\Calendar\Owner
+    {
+        return self::find($owner_id);
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function isCalendarReadable(?string $user_id = null): bool
+    {
+        if ($user_id === null) {
+            $user_id = User::findCurrent()->id;
+        }
+
+        //Calendar read permissions are granted for all participants
+        //that have at least user permissions.
+        return $GLOBALS['perm']->have_studip_perm('user', $this->id, $user_id);
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function isCalendarWritable(string $user_id = null): bool
+    {
+        if ($user_id === null) {
+            $user_id = User::findCurrent()->id;
+        }
+
+        //Calendar write permissions are granted for all participants
+        //that have autor permissions or higher.
+        return $GLOBALS['perm']->have_studip_perm('autor', $this->id, $user_id);
+    }
+
+    /**
+     * Get user information for all users in this course
+     *
+     */
+    public function getMembersData(?string $status = ''): array
+    {
+        $result = [];
+
+        if (!$status) {
+            foreach ($this->members->orderBy('position, nachname') as $member) {
+                $result[$member->user_id] = $member->getExportData();
+            }
+            foreach ($this->admission_applicants->findBy('status', 'accepted')->orderBy('position') as $member) {
+                $result[$member->user_id] = $member->getExportData();
+            }
+        } elseif ($status === 'awaiting') {
+            foreach ($this->admission_applicants->findBy('status', $status)->orderBy('position') as $member) {
+                $result[$member->user_id] = $member->getExportData();
+            }
+        } elseif ($status === 'claiming') {
+            $cs = CourseSet::getSetForCourse($this->id);
+            if (is_object($cs) && !$cs->hasAlgorithmRun()) {
+                $claiming_users = User::findFullMany(array_keys(AdmissionPriority::getPrioritiesByCourse($cs->getId(), $this->id)), 'ORDER BY nachname');
+                foreach ($claiming_users as $claiming_user) {
+                        $studycourse = [];
+                        $claiming_user->studycourses->map(function($sc) use (&$studycourse) {
+                            $studycourse[]= $sc->studycourse->name .  ',' . $sc->degree->name . ',' . $sc->semester;
+                        });
+                        $export_data = [
+                            'status' => $status,
+                            'salutation' => $claiming_user->salutation,
+                            'Titel' => $claiming_user->title_front,
+                            'Vorname' => $claiming_user->vorname,
+                            'Nachname' => $claiming_user->nachname,
+                            'Titel2' => $claiming_user->title_rear,
+                            'username' => $claiming_user->username,
+                            'privadr' => $claiming_user->privadr,
+                            'privatnr' => $claiming_user->privatnr,
+                            'Email' => $claiming_user->email,
+                            'Anmeldedatum' => '',
+                            'Matrikelnummer' => $claiming_user->matriculation_number,
+                            'studiengaenge' => implode(';', $studycourse),
+                            'position' => 0,
+                        ];
+                    $result[$claiming_user->user_id] = $export_data;
+                }
+            }
+        }
+
+        return $result;
+    }
+
+}