|  |  | 
 |  |  | <?php | 
 |  |  | require_once 'vendor/autoload.php'; | 
 |  |  | require_once(__DIR__.'/lib/database.php'); | 
 |  |  | require_once(__DIR__.'/lib/fetch.php'); | 
 |  |  | require_once(__DIR__.'/lib/mapper.php'); | 
 |  |  |  | 
 |  |  | use transit_realtime\FeedMessage; | 
 |  |  | $logger = new Monolog\Logger('Parse changes'); | 
 |  |  |  | 
 |  |  | class IdMapper { | 
 |  |  |    private $jsonTrips = []; | 
 |  |  |    private $gtfsTrips = []; | 
 |  |  | 	 | 
 |  |  |    private $specialNames = [ | 
 |  |  |       'Zjazd do zajezdni', | 
 |  |  |       'Przejazd techniczny', | 
 |  |  |       'Wyjazd na trasÄ™', | 
 |  |  |    ]; | 
 |  |  | 	 | 
 |  |  |    public static function convertTripId($tripId) { | 
 |  |  |       $tripId = explode('_', $tripId); | 
 |  |  |       if($tripId[0] != 'block') return; | 
 |  |  |       if($tripId[2] != 'trip') return; | 
 |  |  |       return 4096 * (int)$tripId[1] + (int)$tripId[3]; | 
 |  |  |    } | 
 |  |  | 	 | 
 |  |  |    public function loadJson($file) { | 
 |  |  |       $json = json_decode(file_get_contents($file)); | 
 |  |  |       foreach($json->vehicles as $vehicle) { | 
 |  |  |          if(isset($vehicle->isDeleted) && $vehicle->isDeleted) continue; | 
 |  |  |          if(!isset($vehicle->tripId) || !$vehicle->tripId) continue; | 
 |  |  |          if(!isset($vehicle->name) || !$vehicle->name) continue; | 
 |  |  |          if(!isset($vehicle->latitude) || !$vehicle->latitude) continue; | 
 |  |  |          if(!isset($vehicle->longitude) || !$vehicle->longitude) continue; | 
 |  |  |          foreach($this->specialNames as $name) { | 
 |  |  |             if(substr($vehicle->name, -strlen($name)) == $name) { | 
 |  |  |                continue; | 
 |  |  | $sources = [ | 
 |  |  |    'bus' => [ | 
 |  |  |       'gtfsrt' => 'ftp://ztp.krakow.pl/VehiclePositions_A.pb', | 
 |  |  |       'gtfsrt_file' => 'VehiclePositions_A.pb', | 
 |  |  |       'ttss' => 'http://ttss.mpk.krakow.pl/internetservice/geoserviceDispatcher/services/vehicleinfo/vehicles', | 
 |  |  |       'ttss_file' => 'vehicles_A.json', | 
 |  |  |       'database' => 'mapping_A.sqlite3', | 
 |  |  |       'result' => 'mapping_A.json', | 
 |  |  |       'mapper' => 'numToTypeB', | 
 |  |  |    ], | 
 |  |  |    'tram' => [ | 
 |  |  |       'gtfsrt' => 'ftp://ztp.krakow.pl/VehiclePositions_T.pb', | 
 |  |  |       'gtfsrt_file' => 'VehiclePositions_T.pb', | 
 |  |  |       'ttss' => 'http://www.ttss.krakow.pl/internetservice/geoserviceDispatcher/services/vehicleinfo/vehicles', | 
 |  |  |       'ttss_file' => 'vehicles_T.json', | 
 |  |  |       'database' => 'mapping_T.sqlite3', | 
 |  |  |       'result' => 'mapping_T.json', | 
 |  |  |       'mapper' => 'numToTypeT', | 
 |  |  |    ], | 
 |  |  |    'tram2' => [ | 
 |  |  |       'gtfsrt' => 'ftp://ztp.krakow.pl/VehiclePositions.pb', | 
 |  |  |       'gtfsrt_file' => 'VehiclePositions_T.pb', | 
 |  |  |       'ttss' => 'http://www.ttss.krakow.pl/internetservice/geoserviceDispatcher/services/vehicleinfo/vehicles', | 
 |  |  |       'ttss_file' => 'vehicles_T.json', | 
 |  |  |       'database' => 'mapping_T.sqlite3', | 
 |  |  |       'result' => 'mapping_T.json', | 
 |  |  |       'mapper' => 'numToTypeT', | 
 |  |  |    ], | 
 |  |  | ]; | 
 |  |  |  | 
 |  |  | foreach($sources as $name => $source) { | 
 |  |  |    $logger = new Monolog\Logger('fetch_'.$name); | 
 |  |  |    try { | 
 |  |  |       foreach(['gtfsrt_file', 'ttss_file', 'database', 'result'] as $field) { | 
 |  |  |          $source[$field] = __DIR__.'/data/'.$source[$field]; | 
 |  |  |       } | 
 |  |  |       $source['result_temp'] = $source['result'].'.tmp'; | 
 |  |  | 		 | 
 |  |  |       $logger->info('Fetching '.$name.' position data from FTP...'); | 
 |  |  |       $updated = ftp_fetch_if_newer($source['gtfsrt'], $source['gtfsrt_file']); | 
 |  |  |       if(!$updated) { | 
 |  |  |          $logger->info('Nothing to do, remote file not newer than local one'); | 
 |  |  |          continue; | 
 |  |  |       } | 
 |  |  | 		 | 
 |  |  |       $logger->info('Fetching '.$name.' position data from TTSS...'); | 
 |  |  |       fetch($source['ttss'], $source['ttss_file']); | 
 |  |  | 		 | 
 |  |  |       $logger->info('Loading data...'); | 
 |  |  |       $mapper = new Mapper(); | 
 |  |  | 		 | 
 |  |  |       $mapper->loadTTSS($source['ttss_file']); | 
 |  |  |       $timeDifference = time() - $mapper->getTTSSDate(); | 
 |  |  |       if(abs($timeDifference) > 120) { | 
 |  |  |          throw new Exception('TTSS timestamp difference ('.$timeDifference.'s) is too high, aborting!'); | 
 |  |  |       } | 
 |  |  | 		 | 
 |  |  |       $mapper->loadGTFSRT($source['gtfsrt_file']); | 
 |  |  |       $timeDifference = time() - $mapper->getGTFSRTDate(); | 
 |  |  |       if(abs($timeDifference) > 120) { | 
 |  |  |          throw new Exception('GTFSRT timestamp difference ('.$timeDifference.'s) is too high, aborting!'); | 
 |  |  |       } | 
 |  |  | 		 | 
 |  |  |       $db = new Database($source['database']); | 
 |  |  | 		 | 
 |  |  |       $logger->info('Finding correct offset...'); | 
 |  |  |       $offset = $mapper->findOffset(); | 
 |  |  |       if(!$offset) { | 
 |  |  |          throw new Exception('Offset not found'); | 
 |  |  |       } | 
 |  |  | 		 | 
 |  |  |       $logger->info('Got offset '.$offset.', creating mapping...'); | 
 |  |  |       $mapping = $mapper->mapUsingOffset($offset, $source['mapper']); | 
 |  |  | 		 | 
 |  |  |       $logger->info('Checking the data for correctness...'); | 
 |  |  |       $weight = count($mapping); | 
 |  |  | 		 | 
 |  |  |       $correct = 0; | 
 |  |  |       $incorrect = 0; | 
 |  |  |       $old = 0; | 
 |  |  |       $maxWeight = 0; | 
 |  |  |       foreach($mapping as $id => $vehicle) { | 
 |  |  |          $dbVehicle = $db->getById($id); | 
 |  |  |          if($dbVehicle) { | 
 |  |  |             $maxWeight = max($maxWeight, $dbVehicle['weight']); | 
 |  |  |             if((int)substr($vehicle['num'], 2) == (int)$dbVehicle['num']) { | 
 |  |  |                $correct += 1; | 
 |  |  |             } else { | 
 |  |  |                $incorrect += 1; | 
 |  |  |             } | 
 |  |  |          } | 
 |  |  |          $this->jsonTrips[(int)$vehicle->tripId] = [ | 
 |  |  |             'id' => $vehicle->id, | 
 |  |  |             'latitude' => (float)$vehicle->latitude / 3600000.0, | 
 |  |  |             'longitude' => (float)$vehicle->longitude / 3600000.0, | 
 |  |  |          ]; | 
 |  |  |       } | 
 |  |  |       ksort($this->jsonTrips); | 
 |  |  |    } | 
 |  |  | 	 | 
 |  |  |    public function loadGtfs($file) { | 
 |  |  |       $data = file_get_contents($file); | 
 |  |  |       $feed = new FeedMessage(); | 
 |  |  |       $feed->parse($data); | 
 |  |  |       foreach ($feed->getEntityList() as $entity) { | 
 |  |  |          $vehiclePosition = $entity->getVehicle(); | 
 |  |  |          $position = $vehiclePosition->getPosition(); | 
 |  |  |          $vehicle = $vehiclePosition->getVehicle(); | 
 |  |  |          $trip = $vehiclePosition->getTrip(); | 
 |  |  |          $tripId = $trip->getTripId(); | 
 |  |  |          $this->gtfsTrips[self::convertTripId($tripId)] = [ | 
 |  |  |             'num' => $vehicle->getLicensePlate(), | 
 |  |  |             'tripId' => $tripId, | 
 |  |  |             'latitude' => $position->getLatitude(), | 
 |  |  |             'longitude' => $position->getLongitude(), | 
 |  |  |          ]; | 
 |  |  |       } | 
 |  |  |       ksort($this->gtfsTrips); | 
 |  |  |    } | 
 |  |  | 	 | 
 |  |  |    public function findOffset() { | 
 |  |  |       if(count($this->jsonTrips) == 0 || count($this->gtfsTrips) == 0) { | 
 |  |  |          return NULL; | 
 |  |  |       } | 
 |  |  | 		 | 
 |  |  |       $jsonTripIds = array_keys($this->jsonTrips); | 
 |  |  |       $gtfsTripIds = array_keys($this->gtfsTrips); | 
 |  |  | 		 | 
 |  |  |       $possibleOffsets = []; | 
 |  |  |       for($i = 0; $i < count($this->jsonTrips); $i++) { | 
 |  |  |          for($j = 0; $j < count($this->gtfsTrips); $j++) { | 
 |  |  |             $possibleOffsets[$jsonTripIds[$i] - $gtfsTripIds[$j]] = TRUE; | 
 |  |  |          } | 
 |  |  |       } | 
 |  |  |       $possibleOffsets = array_keys($possibleOffsets); | 
 |  |  | 		 | 
 |  |  |       $bestOffset = 0; | 
 |  |  |       $maxMatched = 0; | 
 |  |  |       $options = 0; | 
 |  |  | 		 | 
 |  |  |       foreach($possibleOffsets as $offset) { | 
 |  |  |          $matched = 0; | 
 |  |  | 			 | 
 |  |  |          foreach($gtfsTripIds as $tripId) { | 
 |  |  |             $tripId += $offset; | 
 |  |  |             if(isset($this->jsonTrips[$tripId])) { | 
 |  |  |                $matched++; | 
 |  |  |             } | 
 |  |  |             continue; | 
 |  |  |          } | 
 |  |  |           | 
 |  |  |          if($matched > $maxMatched) { | 
 |  |  |             $bestOffset = $offset; | 
 |  |  |             $maxMatched = $matched; | 
 |  |  |             $options = 1; | 
 |  |  |          } elseif($matched == $maxMatched) { | 
 |  |  |             $options++; | 
 |  |  |          $dbVehicle = $db->getByNum($vehicle['num']); | 
 |  |  |          if($dbVehicle && $dbVehicle['id'] != $id) { | 
 |  |  |             $old += 1; | 
 |  |  |          } | 
 |  |  |       } | 
 |  |  |       $logger->info('Weight: '.$weight.', correct: '.$correct.', incorrect: '.$incorrect.', old: '.$old); | 
 |  |  | 		 | 
 |  |  |       $previousMapping = NULL; | 
 |  |  |       if($incorrect > $correct && $maxWeight > $weight) { | 
 |  |  |          throw new Exception('Ignoring result due to better data already present'); | 
 |  |  |       } elseif($old > $correct) { | 
 |  |  |          $logger->warn('Replacing DB data with the new mapping'); | 
 |  |  |          $db->clear(); | 
 |  |  |       } else { | 
 |  |  |          $previousMapping = @json_decode(@file_get_contents($source['result']), TRUE); | 
 |  |  |       } | 
 |  |  |        | 
 |  |  |       if($options != 1) { | 
 |  |  |          return FALSE; | 
 |  |  |       $db->addMapping($mapping); | 
 |  |  | 		 | 
 |  |  |       if(is_array($previousMapping)) { | 
 |  |  |          $logger->info('Merging previous data with current mapping'); | 
 |  |  |          $mapping = $mapping + $previousMapping; | 
 |  |  |          ksort($mapping); | 
 |  |  |       } | 
 |  |  |       return $bestOffset; | 
 |  |  |    } | 
 |  |  | 	 | 
 |  |  |    public function getMapping($offset) { | 
 |  |  |       $result = []; | 
 |  |  |       foreach($this->gtfsTrips as $gtfsTripId => $gtfsTrip) { | 
 |  |  |          $jsonTripId = $gtfsTripId + $offset; | 
 |  |  |          if(isset($this->jsonTrips[$jsonTripId])) { | 
 |  |  |             $result[$jsonTripId] = [ | 
 |  |  |                'num' => $gtfsTrip['num'], | 
 |  |  |             ]; | 
 |  |  |          } | 
 |  |  | 		 | 
 |  |  |       $json = json_encode($mapping); | 
 |  |  |       if(!file_put_contents($source['result_temp'], $json)) { | 
 |  |  |          throw new Exception('Result save failed'); | 
 |  |  |       } | 
 |  |  |       return $result; | 
 |  |  |       rename($source['result_temp'], $source['result']); | 
 |  |  |       $logger->info('Finished'); | 
 |  |  |    } catch(Throwable $e) { | 
 |  |  |       $logger->error($e->getMessage(), ['exception' => $e, 'exception_string' => (string)$e]); | 
 |  |  |    } | 
 |  |  | } | 
 |  |  |  | 
 |  |  | $mapper = new IdMapper(); | 
 |  |  | $mapper->loadJson('./data/vehicles_A.json'); | 
 |  |  | $mapper->loadGtfs('./data/VehiclePositions_A.pb'); | 
 |  |  | $offset = $mapper->findOffset(); | 
 |  |  | if($offset) { | 
 |  |  |    echo json_encode($mapper->getMapping($offset)); | 
 |  |  | } |