5c1ce6906e2c1513ff1a49422c527439d66f4fa9
[rails.git] / app / assets / javascripts / index / directions / osrm.js
1 // OSRM car engine
2 // Doesn't yet support hints
3
4 function OSRMEngine() {
5   var previousPoints, hintData;
6
7   return {
8     id: "osrm_car",
9     creditline: '<a href="http://project-osrm.org/" target="_blank">OSRM</a>',
10     draggable: true,
11
12     getRoute: function (points, callback) {
13       var TURN_INSTRUCTIONS = [
14         "",
15         'javascripts.directions.instructions.continue_on',      // 1
16         'javascripts.directions.instructions.slight_right',     // 2
17         'javascripts.directions.instructions.turn_right',       // 3
18         'javascripts.directions.instructions.sharp_right',      // 4
19         'javascripts.directions.instructions.uturn',            // 5
20         'javascripts.directions.instructions.sharp_left',       // 6
21         'javascripts.directions.instructions.turn_left',        // 7
22         'javascripts.directions.instructions.slight_left',      // 8
23         'javascripts.directions.instructions.via_point',        // 9
24         'javascripts.directions.instructions.follow',           // 10
25         'javascripts.directions.instructions.roundabout',       // 11
26         'javascripts.directions.instructions.leave_roundabout', // 12
27         'javascripts.directions.instructions.stay_roundabout',  // 13
28         'javascripts.directions.instructions.start',            // 14
29         'javascripts.directions.instructions.destination',      // 15
30         'javascripts.directions.instructions.against_oneway',   // 16
31         'javascripts.directions.instructions.end_oneway'        // 17
32       ];
33
34       var url = document.location.protocol + "//router.project-osrm.org/viaroute?z=14&output=json&instructions=true";
35
36       for (var i = 0; i < points.length; i++) {
37         url += "&loc=" + points[i].lat + ',' + points[i].lng;
38         if (hintData && previousPoints && previousPoints[i].equals(points[i])) {
39           url += "&hint=" + hintData.locations[i];
40         }
41       }
42
43       if (hintData && hintData.checksum) {
44         url += "&checksum=" + hintData.checksum;
45       }
46
47       return $.ajax({
48         url: url,
49         dataType: 'json',
50         success: function (data) {
51           if (data.status === 207)
52             return callback(true);
53
54           previousPoints = points;
55           hintData = data.hint_data;
56
57           var line = L.PolylineUtil.decode(data.route_geometry, {
58             precision: 6
59           });
60
61           var steps = [];
62           for (i = 0; i < data.route_instructions.length; i++) {
63             var s = data.route_instructions[i];
64             var linesegend;
65             var instCodes = s[0].split('-');
66             var instText = "<b>" + (i + 1) + ".</b> ";
67             var name = s[1] ? "<b>" + s[1] + "</b>" : I18n.t('javascripts.directions.instructions.unnamed');
68             if (instCodes[0] === "11" && instCodes[1]) {
69               instText += I18n.t('javascripts.directions.instructions.roundabout_with_exit', { exit: instCodes[1], name: name } );
70             } else {
71               instText += I18n.t(TURN_INSTRUCTIONS[instCodes[0]], { name: name });
72             }
73             if ((i + 1) < data.route_instructions.length) {
74               linesegend = data.route_instructions[i + 1][3] + 1;
75             } else {
76               linesegend = s[3] + 1;
77             }
78             steps.push([line[s[3]], s[0].split('-')[0], instText, s[2], line.slice(s[3], linesegend)]);
79           }
80
81           callback(null, {
82             line: line,
83             steps: steps,
84             distance: data.route_summary.total_distance,
85             time: data.route_summary.total_time
86           });
87         }
88       });
89     }
90   };
91 }
92
93 OSM.Directions.addEngine(new OSRMEngine(), true);