/**
* This function gets run whenever a role is assigned to a user in a context
*
* @param integer $userid
* @param object $context
* @return bool
*/
function mumiemodule_role_unassign($userid, $context)
{
//TODO: return-werte bearbeiten
global $CFG;
//it is not possible to check if this had been a teacher before removal
//but we can check if this user was NOT a student in a group in this course
if ($context->contextlevel == CONTEXT_COURSE) {
if ($groups = groups_get_all_groups($context->instanceid, $userid)) {
foreach ($groups as $group) {
if (groups_is_member($group->id, $userid)) {
//so this is a tutor or student
$mumiemodules = get_records('mumiemodule', 'course', $context->instanceid);
//list of all mumiemodules in the course
$mumiemodules = array_values($mumiemodules);
if (!record_exists('mumiemodule_students', 'userid', $userid, 'mumiemodule', $mumiemodules[0]->id)) {
//so this was no student
//the user had been a tutor - we have to change the tutorial
$tutorial = new object();
$tutorial->syncid = 'moodle-' . $CFG->prefix . 'group-' . $group->id;
$tutorial->tutor = 'moodle-dummy_tutor';
change_tutorial_for_mumie($tutorial);
//the user could have been a tutor but could also been a teacher - so try:
return mumiemodule_remove_teacher_subscriptions($userid, $context);
} else {
//this had been a student that is still in a MUMIE-tutorial
$user_sync_id = 'moodle-' . $CFG->prefix . 'user-' . $userid;
$group_sync_id = 'moodle-' . $CFG->prefix . 'group-' . $group->id;
remove_user_from_mumie_tutorial($user_sync_id, $group_sync_id);
//and now the student has to be removed from all mumiemodules in this course
foreach ($mumiemodules as $mumiemodule) {
mumiemodule_students_unsubscribe($userid, $mumiemodule, $group->id);
}
}
}
}
} else {
//this user could have been nearly any role - so try:
return mumiemodule_remove_teacher_subscriptions($userid, $context);
}
}
//for any other context we try to remove teachers:
return mumiemodule_remove_teacher_subscriptions($userid, $context);
}
/**
* Function to handle the group_user_removed-event
*
* @param object $eventdata - the event's data
*/
function group_user_removed_handler($eventdata)
{
global $CFG;
//check if this group is relevant
$group = groups_get_group($eventdata->groupid);
$courseid = $group->courseid;
$context = get_context_instance(CONTEXT_COURSE, $courseid);
if (record_exists('mumiemodule_students', 'groupid', $eventdata->groupid)) {
event_logoutput("group_user_removed_handler called \n", $eventdata);
//check if removed user might be tutor or not
if (has_capability('mod/mumiemodule:tutorize', $context, $eventdata->userid)) {
//while MUMIE-DB is not changed we insert the Dummy-Tutor:
$tutorial = new object();
$tutorial->syncid = 'moodle-' . $CFG->prefix . 'groups-' . $eventdata->groupid;
$tutorial->name = $eventdata->name;
$tutorial->description = $group->description;
$tutorial->tutor = 'moodle-dummy_tutor';
$tutorial->classid = 'moodle-' . $CFG->prefix . 'course-' . $courseid;
change_tutorial_for_mumie($tutorial);
} else {
if (has_capability('mod/mumiemodule:participate', $context, $eventdata->userid)) {
//this is a student
$userid = 'moodle-' . $CFG->prefix . 'user-' . $eventdata->userid;
$tutorialid = 'moodle-' . $CFG->prefix . 'groups-' . $eventdata->groupid;
remove_user_from_mumie_tutorial($userid, $tutorialid);
//a user must be part in exactly one tutorial per course - so the user has to be removed from the modules of this course
$mumiemodules = get_records('mumiemodule', 'course', $courseid);
foreach ($mumiemodules as $mumiemodule) {
mumiemodule_students_unsubscribe($eventdata->userid, $mumiemodule->id, $eventdata->groupid);
}
}
}
}
return true;
}