Jacek Kowalski
2019-06-21 9739360fc19c793b5b64c5651ea58e55b9474d4b
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
<?php
require_once(__DIR__.'/lib/database.php');
require_once(__DIR__.'/lib/fetch.php');
require_once(__DIR__.'/lib/mapper.php');
 
$logger = new Monolog\Logger('Parse changes');
 
$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;
                }
                continue;
            }
            
            $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);
        }
        
        $db->addMapping($mapping);
        
        if(is_array($previousMapping)) {
            $logger->info('Merging previous data with current mapping');
            $mapping = $mapping + $previousMapping;
            ksort($mapping);
        }
        
        $json = json_encode($mapping);
        if(!file_put_contents($source['result_temp'], $json)) {
            throw new Exception('Result save failed');
        }
        rename($source['result_temp'], $source['result']);
        $logger->info('Finished');
    } catch(Throwable $e) {
        $logger->error($e->getMessage(), ['exception' => $e, 'exception_string' => (string)$e]);
    }
}