/**
  * Get all classrooms for all the courses of a department to show
  * @param Request $request
  * @param $code
  * @return \Illuminate\Contracts\Routing\ResponseFactory|\Symfony\Component\HttpFoundation\Response
  */
 public function getClassrooms(Request $request, $code)
 {
     if ($request->ajax()) {
         $classrooms = Classroom::join('courses', 'classrooms.course_code', '=', 'courses.code')->join('rooms', 'classrooms.room_id', '=', 'rooms.id')->select('classrooms.course_code', 'courses.name as Name', 'rooms.name as Room', 'classrooms.from', 'classrooms.to', 'classrooms.day')->where('classrooms.department_code', '=', $code)->get();
         foreach ($classrooms as $classroom) {
             $classroom->from = date('h:i A', strtotime($classroom->from));
             $classroom->to = date('h:i A', strtotime($classroom->to));
         }
         $classrooms = $classrooms->groupBy('course_code');
         // get details for each course
         $notAllocatedClassroom = Course::select('courses.code', 'courses.name')->where('courses.department_code', '=', $code)->whereNotIn('courses.code', function ($query) {
             $query->select('classrooms.course_code')->from('classrooms');
         })->orderBy('courses.code')->get();
         return response([$classrooms, $notAllocatedClassroom]);
     }
 }