added valhalla routing engine

app/assets/javascripts/index/directions/valhalla.js

@@ -0,0 +1,112 @@
+function ValhallaEngine(id, costing) {
+  var INSTR_MAP = [
+    0, // kNone = 0;
+    8, // kStart = 1;
+    8, // kStartRight = 2;
+    8, // kStartLeft = 3;
+    14, // kDestination = 4;
+    14, // kDestinationRight = 5;
+    14, // kDestinationLeft = 6;
+    0, // kBecomes = 7;
+    0, // kContinue = 8;
+    1, // kSlightRight = 9;
+    2, // kRight = 10;
+    3, // kSharpRight = 11;
+    4, // kUturnRight = 12;
+    4, // kUturnLeft = 13;
+    7, // kSharpLeft = 14;
+    6, // kLeft = 15;
+    5, // kSlightLeft = 16;
+    0, // kRampStraight = 17;
+    24, // kRampRight = 18;
+    25, // kRampLeft = 19;
+    24, // kExitRight = 20;
+    25, // kExitLeft = 21;
+    0, // kStayStraight = 22;
+    1, // kStayRight = 23;
+    5, // kStayLeft = 24;
+    20, // kMerge = 25;
+    10, // kRoundaboutEnter = 26;
+    11, // kRoundaboutExit = 27;
+    17, // kFerryEnter = 28;
+    0, // kFerryExit = 29;
+    ...Array(7).fill(), // irrelevant transit maneuvers
+    21, // kMergeRight = 37;
+    20 // kMergeLeft = 38;
+  ];
+
+  return {
+    id: id,
+    creditline:
+      "<a href='https://gis-ops.com/global-open-valhalla-server-online/' target='_blank'>Valhalla (FOSSGIS)</a>",
+    draggable: false,
+
+    getRoute: function (points, callback) {
+      return $.ajax({
+        url: OSM.FOSSGIS_VALHALLA_URL,
+        data: {
+          json: JSON.stringify({
+            locations: points.map(function (p) {
+              return { lat: p.lat, lon: p.lng };
+            }),
+            costing: costing,
+            directions_options: {
+              units: "km",
+              language: I18n.currentLocale()
+            }
+          })
+        },
+        dataType: "json",
+        success: function (data) {
+          var trip = data.trip;
+
+          if (trip.status === 0) {
+            var line = [];
+            var steps = [];
+            var distance = 0;
+            var time = 0;
+
+            trip.legs.forEach(function (leg) {
+              var legLine = L.PolylineUtil.decode(leg.shape, {
+                precision: 6
+              });
+
+              line = line.concat(legLine);
+
+              leg.maneuvers.forEach(function (manoeuvre) {
+                var point = legLine[manoeuvre.begin_shape_index];
+
+                steps.push([
+                  { lat: point[0], lng: point[1] },
+                  INSTR_MAP[manoeuvre.type],
+                  manoeuvre.instruction,
+                  manoeuvre.length * 1000,
+                  []
+                ]);
+              });
+
+              distance = distance + leg.summary.length;
+              time = time + leg.summary.time;
+            });
+
+            callback(false, {
+              line: line,
+              steps: steps,
+              distance: distance * 1000,
+              time: time
+            });
+          } else {
+            callback(true);
+          }
+        },
+        error: function () {
+          callback(true);
+        }
+      });
+    }
+  };
+}
+
+  OSM.Directions.addEngine(new ValhallaEngine("valhalla_car", "auto"), true);
+  OSM.Directions.addEngine(new ValhallaEngine("valhalla_bicycle", "bicycle"), true);
+  OSM.Directions.addEngine(new ValhallaEngine("valhalla_foot", "pedestrian"), true);

app/assets/javascripts/osm.js.erb

@@ -18,6 +18,7 @@ OSM = {
   NOMINATIM_URL:           <%= Settings.nominatim_url.to_json %>,
   GRAPHHOPPER_URL:         <%= Settings.graphhopper_url.to_json %>,
   FOSSGIS_OSRM_URL:        <%= Settings.fossgis_osrm_url.to_json %>,
+  FOSSGIS_VALHALLA_URL:    <%= Settings.fossgis_valhalla_url.to_json %>,
   DEFAULT_LOCALE:          <%= I18n.default_locale.to_json %>,
 
 <% if Settings.key?(:thunderforest_key) %>