public function store($roomId)
 {
     $request = json_decode(request()->getContent());
     $schedule = new Schedule();
     $schedule->date = $request->date;
     $schedule->start = $request->start;
     $schedule->course_id = $request->course_id;
     $schedule->duration = $request->duration;
     $schedule->room_id = $roomId;
     $saved = $schedule->save();
     return response()->json(array('error' => !$saved, 'schedule' => $schedule->toArray()), $saved ? 200 : 500);
 }