/**
  * @param $schedule
  */
 private function _saveSchedule($schedule)
 {
     foreach ($schedule as $lineId => $lineSchedule) {
         $direction = end($lineSchedule)['stopName'];
         reset($lineSchedule);
         $publicTransport = PublicTransport::firstOrCreate(['name' => $lineId]);
         $publicTransport->setAttribute('name', $lineId);
         $publicTransport->setAttribute('direction', $direction);
         $publicTransport->save();
         foreach ($lineSchedule as $busStop) {
             $publicTransportStop = PublicTransportStop::firstOrNew(['name' => $busStop['stopName']]);
             $publicTransportStop->setAttribute('name', $busStop['stopName']);
             $publicTransportStop->save();
             foreach ($busStop['departures'] as $weekDay => $departures) {
                 foreach ($departures as $departure) {
                     $publicTransportSchedule = new PublicTransportSchedule();
                     $publicTransportSchedule->setAttribute('week_day', $weekDay);
                     $publicTransportSchedule->setAttribute('id_public_transport', $publicTransport->getAttribute('id'));
                     $publicTransportSchedule->setAttribute('id_public_transport_stop', $publicTransportStop->getAttribute('id'));
                     $publicTransportSchedule->setAttribute('departure_datetime', $departure->format('H:i:s'));
                     $publicTransportSchedule->save();
                 }
             }
         }
     }
 }