app/assets/javascripts/routing_engines/osrm_car.js

   1 // OSRM car engine
   2 // *** this should all be shared from an OSRM library somewhere
   3 // *** need to clear hints at some point
   4
   5 OSM.RoutingEngines.list.push({
   6         name: "javascripts.directions.engines.osrm_car",
   7         creditline: 'Directions courtesy of <a href="http://project-osrm.org/" target="_blank">OSRM</a>',
   8         draggable: true,
   9         _hints: {},
  10         getRoute: function(isFinal,points) {
  11                 var url="http://router.project-osrm.org/viaroute?z=14&output=json";
  12                 for (var i=0; i<points.length; i++) {
  13                         var pair=points[i].join(',');
  14                         url+="&loc="+pair;
  15                         if (this._hints[pair]) url+= "&hint="+this._hints[pair];
  16                 }
  17                 if (isFinal) url+="&instructions=true";
  18                 this.requestJSONP(url+"&jsonp=");
  19         },
  20         gotRoute: function(router,data) {
  21                 if (data.status==207) {
  22                         alert("Couldn't find route between those two places");
  23                         return false;
  24                 }
  25                 // Draw polyline
  26                 var line=L.PolylineUtil.decode(data.route_geometry);
  27                 for (i=0; i<line.length; i++) { line[i].lat/=10; line[i].lng/=10; }
  28                 router.setPolyline(line);
  29                 // *** store hints
  30                 // Assemble instructions
  31                 var steps=[];
  32                 for (i=0; i<data.route_instructions.length; i++) {
  33                         var s=data.route_instructions[i];
  34                         var instCodes=s[0].split('-');
  35                         var instText="<b>"+(i+1)+".</b> ";
  36                         instText+=TURN_INSTRUCTIONS[instCodes[0]];
  37                         if (instCodes[1]) { instText+="exit "+instCodes[1]+" "; }
  38                         if (instCodes[0]!=15) { instText+=s[1] ? "<b>"+s[1]+"</b>" : I18n.t('javascripts.directions.instructions.unnamed'); }
  39                         steps.push([line[s[3]], s[0].split('-')[0], instText, s[2]]);
  40                 }
  41                 if (steps.length) router.setItinerary({ steps: steps });
  42         }
  43 });