/**
* Get participant ids for given object
*
* @param int $a_ref_id
* @return array
*/
public static function getParticipantsForObject($a_ref_id)
{
global $tree;
$obj_id = ilObject::_lookupObjectId($a_ref_id);
$obj_type = ilObject::_lookupType($obj_id);
// try to get participants from (parent) course/group
switch ($obj_type) {
case "crs":
include_once "Modules/Course/classes/class.ilCourseParticipants.php";
$member_obj = ilCourseParticipants::_getInstanceByObjId($obj_id);
return $member_obj->getMembers();
case "grp":
include_once "Modules/Group/classes/class.ilGroupParticipants.php";
$member_obj = ilGroupParticipants::_getInstanceByObjId($obj_id);
return $member_obj->getMembers();
default:
// walk path to find course or group object and use members of that object
$path = $tree->getPathId($a_ref_id);
array_pop($path);
foreach (array_reverse($path) as $path_ref_id) {
$type = ilObject::_lookupType($path_ref_id, true);
if ($type == "crs" || $type == "grp") {
return self::getParticipantsForObject($path_ref_id);
}
}
break;
}
$a_users = null;
// no participants possible: use tracking/object data where possible
switch ($obj_type) {
case "sahs":
include_once "./Modules/ScormAicc/classes/class.ilObjSAHSLearningModule.php";
$subtype = ilObjSAHSLearningModule::_lookupSubType($obj_id);
if ($subtype == "scorm2004") {
// based on cmi_node/cp_node, used for scorm tracking data views
include_once "./Modules/Scorm2004/classes/class.ilObjSCORM2004LearningModule.php";
$mod = new ilObjSCORM2004LearningModule($obj_id, false);
$all = $mod->getTrackedUsers("");
if ($all) {
$a_users = array();
foreach ($all as $item) {
$a_users[] = $item["user_id"];
}
}
} else {
include_once "./Modules/ScormAicc/classes/SCORM/class.ilObjSCORMTracking.php";
$a_users = ilObjSCORMTracking::_getTrackedUsers($obj_id);
}
break;
case "exc":
include_once "./Modules/Exercise/classes/class.ilExerciseMembers.php";
include_once "./Modules/Exercise/classes/class.ilObjExercise.php";
$exc = new ilObjExercise($obj_id, false);
$members = new ilExerciseMembers($exc);
$a_users = $members->getMembers();
break;
case "tst":
include_once "./Services/Tracking/classes/class.ilLPStatusTestFinished.php";
$a_users = ilLPStatusTestFinished::getParticipants($obj_id);
break;
default:
// no sensible data: return null
break;
}
return $a_users;
}
