}
break;
case 'get_exercise_results':
$exercise_id = $_REQUEST['exerciseId'];
if (isset($_GET['filter_by_user']) && !empty($_GET['filter_by_user'])) {
$filter_user = intval($_GET['filter_by_user']);
if ($where_condition == "") {
$where_condition .= " te.exe_user_id = '{$filter_user}'";
} else {
$where_condition .= " AND te.exe_user_id = '{$filter_user}'";
}
}
$count = ExerciseLib::get_count_exam_results($exercise_id, $where_condition);
break;
case 'get_admin_exercise_results':
$count = ExerciseLib::get_admin_count_exam_results($where_condition);
break;
case 'get_hotpotatoes_exercise_results':
$hotpot_path = $_REQUEST['path'];
$count = ExerciseLib::get_count_exam_hotpotatoes_results($hotpot_path);
break;
case 'get_sessions':
$list_type = isset($_REQUEST['list_type']) ? $_REQUEST['list_type'] : 'simple';
if ($list_type == 'simple') {
$count = SessionManager::get_sessions_admin(array('where' => $where_condition, 'extra' => $extra_fields), true);
} else {
$count = SessionManager::get_count_admin_complete(array('where' => $where_condition, 'extra' => $extra_fields));
}
break;
case 'get_extra_fields':
$type = $_REQUEST['type'];
