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: 'Car (OSRM)',
   7         draggable: true,
   8         _hints: {},
   9         getRoute: function(final,points) {
  10                 var url="http://router.project-osrm.org/viaroute?z=14&output=json";
  11                 for (var i=0; i<points.length; i++) {
  12                         var pair=points[i].join(',');
  13                         url+="&loc="+pair;
  14                         if (this._hints[pair]) url+= "&hint="+this._hints[pair];
  15                 }
  16                 if (final) url+="&instructions=true";
  17                 this.requestJSONP(url+"&jsonp=");
  18         },
  19         gotRoute: function(router,data) {
  20                 if (data.status==207) {
  21                         alert("Couldn't find route between those two places");
  22                         return false;
  23                 }
  24                 // Draw polyline
  25                 var line=L.PolylineUtil.decode(data.route_geometry);
  26                 for (i=0; i<line.length; i++) { line[i].lat/=10; line[i].lng/=10; }
  27                 router.setPolyline(line);
  28                 // *** store hints
  29                 // Assemble instructions
  30                 var steps=[];
  31                 for (i=0; i<data.route_instructions.length; i++) {
  32                         var s=data.route_instructions[i];
  33                         var instCodes=s[0].split('-');
  34                         var instText="<b>"+(i+1)+".</b> ";
  35                         instText+=TURN_INSTRUCTIONS[instCodes[0]];
  36                         if (instCodes[1]) { instText+="exit "+instCodes[1]+" "; }
  37                         if (instCodes[0]!=15) { instText+=s[1] ? "<b>"+s[1]+"</b>" : "(unnamed)"; }
  38                         steps.push([line[s[3]], s[0].split('-')[0], instText, s[2]]);
  39                 }
  40                 if (steps.length) router.setItinerary({ steps: steps });
  41         }
  42 });