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
136
137
138
139
140
141
142
143
<?php
use transit_realtime\FeedMessage;
 
class Mapper {
    private $ttssDate = NULL;
    private $ttssTrips = [];
    private $gtfsrtDate = NULL;
    private $gtfsrtTrips = [];
    private $logger = NULL;
    
    private $specialNames = [
        'Zjazd do zajezdni',
        'Przejazd techniczny',
        'Wyjazd na trasę',
    ];
    
    public function __construct() {
        $this->logger = new Monolog\Logger(__CLASS__);
    }
    
    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 loadTTSS($file) {
        $ttss = json_decode(file_get_contents($file));
        $this->ttssDate = $ttss->lastUpdate;
        foreach($ttss->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) || !$vehicle->longitude) continue;
            list($line, $direction) = explode(' ', $vehicle->name, 2);
            foreach($this->specialNames as $specialName) {
                if(substr($vehicle->name, -strlen($specialName)) == $specialName) {
                    continue;
                }
            }
            $this->ttssTrips[(string)$vehicle->tripId] = [
                'id' => (string)$vehicle->id,
                'line' => $line,
                'direction' => $direction,
                'latitude' => (float)$vehicle->latitude / 3600000.0,
                'longitude' => (float)$vehicle->longitude / 3600000.0,
            ];
        }
        ksort($this->ttssTrips);
    }
    
    public function getTTSSDate() {
        return $this->ttssDate / 1000.0;
    }
    
    public function getTTSSTrips() {
        return $this->ttssTrips;
    }
    
    public function loadGTFSRT($file) {
        $data = file_get_contents($file);
        $feed = new FeedMessage();
        $feed->parse($data);
        $this->gtfsrtDate = $feed->header->timestamp;
        foreach ($feed->getEntityList() as $entity) {
            $vehiclePosition = $entity->getVehicle();
            $position = $vehiclePosition->getPosition();
            $vehicle = $vehiclePosition->getVehicle();
            $trip = $vehiclePosition->getTrip();
            $tripId = $trip->getTripId();
            $this->gtfsrtTrips[self::convertTripId($tripId)] = [
                'id' => (string)$entity->getId(),
                'num' => $vehicle->getLicensePlate(),
                'tripId' => $tripId,
                'latitude' => $position->getLatitude(),
                'longitude' => $position->getLongitude(),
            ];
        }
        ksort($this->gtfsrtTrips);
    }
    
    public function getGTFSRTDate() {
        return $this->gtfsrtDate;
    }
    
    public function findOffset() {
        if(count($this->ttssTrips) == 0 || count($this->gtfsrtTrips) == 0) {
            return NULL;
        }
        
        $ttssTripIds = array_keys($this->ttssTrips);
        $gtfsTripIds = array_keys($this->gtfsrtTrips);
        
        $possibleOffsets = [];
        for($i = 0; $i < count($this->ttssTrips); $i++) {
            for($j = 0; $j < count($this->gtfsrtTrips); $j++) {
                $possibleOffsets[$ttssTripIds[$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->ttssTrips[$tripId])) {
                    $matched++;
                }
            }
            
            if($matched > $maxMatched) {
                $bestOffset = $offset;
                $maxMatched = $matched;
                $options = 1;
            } elseif($matched == $maxMatched) {
                $options++;
            }
        }
        
        if($options != 1) {
            throw new Exception('Found '.$options.' possible mappings!');
        }
        return $bestOffset;
    }
    
    public function mapUsingOffset($offset) {
        $result = [];
        foreach($this->gtfsrtTrips as $gtfsTripId => $gtfsTrip) {
            $ttssTripId = $gtfsTripId + $offset;
            if(isset($this->ttssTrips[$ttssTripId])) {
                $result[$this->ttssTrips[$ttssTripId]['id']] = $gtfsTrip['id'];
            }
        }
        return $result;
    }
}