| | |
| | | <?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; |
| | | $sources = [ |
| | | 'bus' => [ |
| | | 'gtfsrt' => 'ftp://ztp.krakow.pl/VehiclePositions_A.pb', |
| | | 'gtfsrt_file' => 'VehiclePositions_A.pb', |
| | | 'ttss' => 'http://ttss.mpk.krakow.pl/internetservice/geoserviceDispatcher/services/vehicleinfo/vehicles', |
| | | 'ttss_file' => 'vehicles_A.json', |
| | | 'database' => 'mapping_A.sqlite3', |
| | | 'result' => 'mapping_A.json', |
| | | 'mapper' => 'numToTypeB', |
| | | ], |
| | | 'tram' => [ |
| | | 'gtfsrt' => 'ftp://ztp.krakow.pl/VehiclePositions.pb', |
| | | 'gtfsrt_file' => 'VehiclePositions_T.pb', |
| | | 'ttss' => 'http://www.ttss.krakow.pl/internetservice/geoserviceDispatcher/services/vehicleinfo/vehicles', |
| | | 'ttss_file' => 'vehicles_T.json', |
| | | 'database' => 'mapping_T.sqlite3', |
| | | 'result' => 'mapping_T.json', |
| | | 'mapper' => 'numToTypeT', |
| | | ], |
| | | ]; |
| | | |
| | | foreach($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)); |
| | | } |