app/assets/javascripts/index/directions_engines/osrm.js

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