public static function process_enrolments($event = null, $instanceid = null)
{
global $DB;
$nbenrolled = 0;
$possible_unenrolments = array();
if ($instanceid) {
// We're processing one particular instance, making sure it's active
$enrol_attributes_records = $DB->get_records('enrol', array('enrol' => 'attributes', 'status' => 0, 'id' => $instanceid));
} else {
// We're processing all active instances,
// because a user just logged in
// OR we're running the cron
$enrol_attributes_records = $DB->get_records('enrol', array('enrol' => 'attributes', 'status' => 0));
if (!is_null($event)) {
// Let's check if there are any potential unenroling instances
$userid = (int) $event->userid;
$possible_unenrolments = $DB->get_records_sql("SELECT id, enrolid FROM {user_enrolments} WHERE userid = ? AND status = 0 AND enrolid IN ( SELECT id FROM {enrol} WHERE enrol = 'attributes' AND customint1 = 1 ) ", array($userid));
}
}
// are we to unenrol from anywhere?
foreach ($possible_unenrolments as $id => $user_enrolment) {
$unenrol_attributes_record = $DB->get_record('enrol', array('enrol' => 'attributes', 'status' => 0, 'customint1' => 1, 'id' => $user_enrolment->enrolid));
if (!$unenrol_attributes_record) {
continue;
}
$select = 'SELECT DISTINCT u.id FROM {user} u';
$where = ' WHERE u.id=' . $userid . ' AND u.deleted=0 AND ';
$arraysyntax = self::attrsyntax_toarray($unenrol_attributes_record->customtext1);
$arraysql = self::arraysyntax_tosql($arraysyntax);
$users = $DB->get_records_sql($select . $arraysql['select'] . $where . $arraysql['where'], $arraysql['params']);
if (!array_key_exists($userid, $users)) {
$enrol_attributes_instance = new enrol_attributes_plugin();
$enrol_attributes_instance->unenrol_user($unenrol_attributes_record, (int) $userid);
}
}
// are we to enrol anywhere?
foreach ($enrol_attributes_records as $enrol_attributes_record) {
$rules = json_decode($enrol_attributes_record->customtext1)->rules;
$configured_profilefields = explode(',', get_config('enrol_attributes', 'profilefields'));
foreach ($rules as $rule) {
if (!isset($rule->param)) {
break;
}
if (!in_array($rule->param, $configured_profilefields)) {
break 2;
}
}
$enrol_attributes_instance = new enrol_attributes_plugin();
$enrol_attributes_instance->name = $enrol_attributes_record->name;
$select = 'SELECT DISTINCT u.id FROM {user} u';
if ($event) {
// called by an event, i.e. user login
$userid = (int) $event->userid;
$where = ' WHERE u.id=' . $userid;
} else {
// called by cron or by construct
$where = ' WHERE 1=1';
}
$where .= ' AND u.deleted=0 AND ';
$arraysyntax = self::attrsyntax_toarray($enrol_attributes_record->customtext1);
$arraysql = self::arraysyntax_tosql($arraysyntax);
$users = $DB->get_records_sql($select . $arraysql['select'] . $where . $arraysql['where'], $arraysql['params']);
foreach ($users as $user) {
if (is_enrolled(context_course::instance($enrol_attributes_record->courseid), $user)) {
continue;
}
$enrol_attributes_instance->enrol_user($enrol_attributes_record, $user->id, $enrol_attributes_record->roleid);
$nbenrolled++;
}
}
if (!$event && !$instanceid) {
// we only want output if runnning within the cron
mtrace('enrol_attributes : enrolled ' . $nbenrolled . ' users.');
}
return $nbenrolled;
}
