app/assets/javascripts/routing_engines/osrm.js

   1 // OSRM car engine
   2 // Doesn't yet support hints
   3
   4 OSRMEngine = function(vehicleName, baseURL, locale) {
   5     this.vehicleName = vehicleName;
   6     this.baseURL = baseURL;
   7     this.locale = locale;
   8     if (!locale)
   9         this.locale = "en";
  10 };
  11
  12 OSRMEngine.prototype.createConfig = function() {
  13     var that = this;
  14     return {
  15         name: "javascripts.directions.engines.osrm_"+this.vehicleName.toLowerCase(),
  16         creditline: 'Directions courtesy of <a href="http://project-osrm.org/" target="_blank">OSRM</a>',
  17         draggable: true,
  18         _hints: {},
  19         getRoute: function(isFinal,points) {
  20             var url=that.baseURL+"?z=14&output=json";
  21             for (var i=0; i<points.length; i++) {
  22                 var pair=points[i].join(',');
  23                 url+="&loc="+pair;
  24                 if (this._hints[pair]) url+= "&hint="+this._hints[pair];
  25             }
  26             if (isFinal) url+="&instructions=true";
  27             this.requestCORS(url);
  28         },
  29         gotRoute: function(router,data) {
  30             if (data.status==207) {
  31                 return false;
  32             }
  33             // Draw polyline
  34             var line=L.PolylineUtil.decode(data.route_geometry);
  35             for (i=0; i<line.length; i++) { line[i].lat/=10; line[i].lng/=10; }
  36             router.setPolyline(line);
  37             // Assemble instructions
  38             var steps=[];
  39             for (i=0; i<data.route_instructions.length; i++) {
  40                 var s=data.route_instructions[i];
  41                 var linesegend;
  42                 var instCodes=s[0].split('-');
  43                 var instText="<b>"+(i+1)+".</b> ";
  44                 instText+=TURN_INSTRUCTIONS[instCodes[0]];
  45                 if (instCodes[1]) { instText+="exit "+instCodes[1]+" "; }
  46                 if (instCodes[0]!=15) { instText+=s[1] ? "<b>"+s[1]+"</b>" : I18n.t('javascripts.directions.instructions.unnamed'); }
  47                 if ((i+1)<data.route_instructions.length) {
  48                     linesegend = data.route_instructions[i+1][3] + 1;
  49                 } else {
  50                     linesegend = s[3] + 1;
  51                 }
  52                 steps.push([line[s[3]], s[0].split('-')[0], instText, s[2], line.slice(s[3], linesegend)]);
  53             }
  54             if (steps.length) router.setItinerary({ steps: steps, distance: data.route_summary.total_distance, time: data.route_summary.total_time });
  55             return true;
  56         }
  57     };
  58 };
  59
  60 OSM.RoutingEngines.add(false, new OSRMEngine("Car", "http://router.project-osrm.org/viaroute").createConfig());