/**
* Unassign the tracks from the userset.
* @param array $elements An array of track information to unassign from the userset.
* @param bool $bulkaction Whether this is a bulk-action or not.
* @return array An array to format as JSON and return to the Javascript.
*/
protected function _respond_to_js(array $elements, $bulkaction)
{
global $DB;
$usersetid = required_param('id', PARAM_INT);
foreach ($elements as $trackid => $label) {
if ($this->can_unassign($usersetid, $trackid) === true) {
$assignrec = $DB->get_record(clustertrack::TABLE, array('clusterid' => $usersetid, 'trackid' => $trackid));
$usertrack = new clustertrack($assignrec);
$usertrack->delete();
}
}
return array('result' => 'success', 'msg' => 'Success');
}
