Jacek Kowalski
2019-06-17 a2010c1bcdc2bb36d6942c311e3c24f47736c117
commit | author | age
138f39 1 <?php
1a98b6 2 require_once(__DIR__.'/lib/database.php');
4673cc 3 require_once(__DIR__.'/lib/fetch.php');
JK 4 require_once(__DIR__.'/lib/mapper.php');
138f39 5
4673cc 6 $logger = new Monolog\Logger('Parse changes');
138f39 7
4673cc 8 $sources = [
0c85a7 9     'bus' => [
JK 10         'gtfsrt' => 'ftp://ztp.krakow.pl/VehiclePositions_A.pb',
11         'gtfsrt_file' => 'VehiclePositions_A.pb',
a2010c 12         'ttss' => 'http://ttss.mpk.krakow.pl/internetservice/geoserviceDispatcher/services/vehicleinfo/vehicles',
4673cc 13         'ttss_file' => 'vehicles_A.json',
1a98b6 14         'database' => 'mapping_A.sqlite3',
914dc8 15         'result' => 'mapping_A.json',
4673cc 16     ],
JK 17 ];
138f39 18
4673cc 19 foreach($sources as $name => $source) {
JK 20     $logger = new Monolog\Logger('fetch_'.$name);
21     try {
0c85a7 22         foreach(['gtfsrt_file', 'ttss_file', 'database', 'result'] as $field) {
1a98b6 23             $source[$field] = __DIR__.'/data/'.$source[$field];
JK 24         }
25         $source['result_temp'] = $source['result'].'.tmp';
26         
4673cc 27         $logger->info('Fetching '.$name.' position data from FTP...');
0c85a7 28         $updated = ftp_fetch_if_newer($source['gtfsrt'], $source['gtfsrt_file']);
4673cc 29         if(!$updated) {
JK 30             $logger->info('Nothing to do, remote file not newer than local one');
31             continue;
32         }
33         
0c85a7 34         $logger->info('Fetching '.$name.' position data from TTSS...');
JK 35         fetch($source['ttss'], $source['ttss_file']);
4673cc 36         
JK 37         $logger->info('Loading data...');
38         $mapper = new Mapper();
9afb6b 39         
1a98b6 40         $mapper->loadTTSS($source['ttss_file']);
9afb6b 41         $timeDifference = time() - $mapper->getTTSSDate();
JK 42         if(abs($timeDifference) > 60) {
43             throw new Exception('TTSS timestamp difference ('.$timeDifference.'s) is too high, aborting!');
44         }
45         
0c85a7 46         $mapper->loadGTFSRT($source['gtfsrt_file']);
9afb6b 47         $timeDifference = time() - $mapper->getGTFSRTDate();
JK 48         if(abs($timeDifference) > 60) {
49             throw new Exception('GTFSRT timestamp difference ('.$timeDifference.'s) is too high, aborting!');
50         }
1a98b6 51         
JK 52         $db = new Database($source['database']);
4673cc 53         
JK 54         $logger->info('Finding correct offset...');
55         $offset = $mapper->findOffset();
1a98b6 56         if(!$offset) {
JK 57             throw new Exception('Offset not found');
4673cc 58         }
1a98b6 59         
JK 60         $logger->info('Got offset '.$offset.', creating mapping...');
0c85a7 61         $mapping = $mapper->mapUsingOffset($offset);
1a98b6 62         
JK 63         $logger->info('Checking the data for correctness...');
64         $weight = count($mapping);
33182e 65         
JK 66         $correct = 0;
67         $incorrect = 0;
68         $old = 0;
69         $maxWeight = 0;
1a98b6 70         foreach($mapping as $id => $vehicle) {
JK 71             $dbVehicle = $db->getById($id);
72             if($dbVehicle) {
33182e 73                 $maxWeight = max($maxWeight, $dbVehicle['weight']);
JK 74                 if((int)substr($vehicle['num'], 2) == (int)$dbVehicle['num']) {
75                     $correct += 1;
76                 } else {
77                     $incorrect += 1;
1a98b6 78                 }
JK 79                 continue;
80             }
81             
82             $dbVehicle = $db->getByNum($vehicle['num']);
83             if($dbVehicle && $dbVehicle['id'] != $id) {
33182e 84                 $old += 1;
1a98b6 85             }
JK 86         }
33182e 87         $logger->info('Weight: '.$weight.', correct: '.$correct.', incorrect: '.$incorrect.', old: '.$old);
1a98b6 88         
JK 89         $previousMapping = NULL;
33182e 90         if($incorrect > $correct && $maxWeight > $weight) {
1a98b6 91             throw new Exception('Ignoring result due to better data already present');
5af1a7 92         } elseif($old > $correct) {
33182e 93             $logger->warn('Replacing DB data with the new mapping');
1a98b6 94             $db->clear();
JK 95         } else {
96             $previousMapping = @json_decode(@file_get_contents($source['result']), TRUE);
97         }
98         
99         $db->addMapping($mapping);
100         
101         if(is_array($previousMapping)) {
102             $logger->info('Merging previous data with current mapping');
423dc9 103             $mapping = $mapping + $previousMapping;
1a98b6 104             ksort($mapping);
JK 105         }
106         
107         $json = json_encode($mapping);
108         if(!file_put_contents($source['result_temp'], $json)) {
109             throw new Exception('Result save failed');
110         }
111         rename($source['result_temp'], $source['result']);
4673cc 112         $logger->info('Finished');
JK 113     } catch(Throwable $e) {
114         $logger->error($e->getMessage(), ['exception' => $e, 'exception_string' => (string)$e]);
115     }
138f39 116 }