/**
* Perform all necessary tasks to remove a student enrolment from the system.
*/
function delete()
{
/// Remove any grade records for this enrolment.
$result = student_grade::delete_for_user_and_class($this->userid, $this->classid);
/// Unenrol them from the Moodle class.
if ($moodlecourseid = moodle_get_course($this->classid)) {
if (($mcourse = $this->_db->get_record('course', array('id' => $moodlecourseid))) && ($muser = $this->users->get_moodleuser())) {
$sql = 'SELECT enrol.*
FROM {user_enrolments} enrolments
JOIN {enrol} enrol ON enrol.id = enrolments.enrolid
WHERE enrol.courseid = ?
AND enrolments.userid = ?';
$enrolments = $this->_db->get_recordset_sql($sql, array($moodlecourseid, $muser->id));
foreach ($enrolments as $enrolment) {
$plugin = enrol_get_plugin($enrolment->enrol);
$plugin->unenrol_user($enrolment, $muser->id);
}
unset($enrolments);
}
}
parent::delete();
if ($this->completestatusid == STUSTATUS_NOTCOMPLETE) {
$pmclass = $this->pmclass;
if (empty($pmclass->maxstudents) || $pmclass->maxstudents > static::count_enroled($pmclass->id)) {
$wlst = waitlist::get_next($this->classid);
if (!empty($wlst)) {
$wlst->enrol();
}
}
}
return $result;
}
/**
* Perform all necessary tasks to remove a student enrolment from the system.
*/
function delete()
{
/// Remove any grade records for this enrolment.
$result = student_grade::delete_for_user_and_class($this->userid, $this->classid);
/// Unenrol them from the Moodle class.
if (!empty($this->classid) && !empty($this->userid) && ($moodlecourseid = get_field('crlm_class_moodle', 'moodlecourseid', 'classid', $this->classid)) && ($muserid = cm_get_moodleuserid($this->userid))) {
$context = get_context_instance(CONTEXT_COURSE, $moodlecourseid);
if ($context && $context->id) {
role_unassign(0, $muserid, 0, $context->id);
}
}
$result = $result && $this->data_delete_record();
if ($this->completestatusid == STUSTATUS_NOTCOMPLETE) {
$cmclass = new cmclass($this->classid);
if (empty($cmclass->maxstudents) || $cmclass->maxstudents > student::count_enroled($cmclass->id)) {
$wlst = waitlist::get_next($this->classid);
if (!empty($wlst)) {
$wlst->enrol();
}
}
}
return $result;
}
public function update()
{
$status = parent::update();
if ($this->moodlecourseid || $this->autocreate) {
moodle_attach_class($this->id, $this->moodlecourseid, '', true, true, $this->autocreate);
}
if (!empty($this->oldmax) && $this->oldmax < $this->maxstudents && waitlist::count_records($this->id) > 0) {
for ($i = $this->oldmax; $i < $this->maxstudents; $i++) {
$next_student = waitlist::get_next($this->id);
if (!empty($next_student)) {
$next_student->enrol();
} else {
break;
}
}
}
$status = $status && field_data::set_for_context_from_datarecord('class', $this);
return $status;
}
public static function check_autoenrol_after_course_completion($enrolment)
{
if ($enrolment->completestatusid != STUSTATUS_NOTCOMPLETE) {
$pmclass = new pmclass($enrolment->classid);
$pmclass->load();
if ((empty($pmclass->maxstudents) || $pmclass->maxstudents > student::count_enroled($pmclass->id)) && !empty($pmclass->enrol_from_waitlist)) {
$wlst = waitlist::get_next($enrolment->classid);
if (!empty($wlst)) {
$crsid = $pmclass->course->id;
foreach ($pmclass->course->curriculumcourse as $curcrs) {
if ($curcrs->courseid == $crsid && $curcrs->prerequisites_satisfied($wlst->userid)) {
$wlst->enrol();
}
}
}
}
}
return true;
}
public function check_autoenrol_after_course_completion($enrolment)
{
if ($enrolment->completestatusid != STUSTATUS_NOTCOMPLETE) {
$cmclass = new cmclass($enrolment->classid);
if ((empty($cmclass->maxstudents) || $cmclass->maxstudents > student::count_enroled($cmclass->id)) && !empty($cmclass->enrol_from_waitlist)) {
$wlst = waitlist::get_next($enrolment->classid);
if (!empty($wlst)) {
$wlst->enrol();
}
}
}
return true;
}
public function save()
{
$isnew = empty($this->id);
parent::save();
if (isset($this->track) && is_array($this->track)) {
$param['classid'] = $this->id;
$param['courseid'] = $this->courseid;
foreach ($this->track as $t) {
if (trackassignment::exists(array(new field_filter('classid', $this->id), new field_filter('trackid', $t)))) {
continue;
}
$param['trackid'] = $t;
$trackassignobj = new trackassignment($param);
$trackassignobj->save();
}
}
if (isset($this->unlink_attached_course) && isset($this->moodlecourseid)) {
// process unlink moodle course id request
$return = moodle_detach_class($this->id, $this->moodlecourseid);
$this->moodlecourseid = 0;
}
if ($this->moodlecourseid || $this->autocreate) {
moodle_attach_class($this->id, $this->moodlecourseid, '', true, true, $this->autocreate);
}
if (!$isnew) {
if (!empty($this->oldmax) && (!$this->maxstudents || $this->oldmax < $this->maxstudents) && ($waiting = waitlist::count_records($this->id)) > 0) {
$start = student_count_records($this->id);
$max = $this->maxstudents ? $this->maxstudents : $start + $waiting + 1;
//error_log("pmclass.class.php::save() oldmax = {$this->oldmax}, start = {$start}, newmax = {$this->maxstudents}, waiting = {$waiting} ... max = {$max}");
for ($i = $start; $i < $max; $i++) {
$next_student = waitlist::get_next($this->id);
if (empty($next_student)) {
break;
}
$next_student->enrol();
}
}
}
field_data::set_for_context_from_datarecord(CONTEXT_ELIS_CLASS, $this);
}
