Simple routing with GH

src/main/webapp/lib.js

@@ -1,7 +1,124 @@
-let lib = new function () {
-    this.setStartMarker = function (coordinates) {
-    }
-    this.setMarker = function (marker, lng, lat, map) {
-        marker.setLngLat([lng, lat]).addTo(map);
+const lib = new function () {
+
+    let ghbase = ""
+
+    /**
+     * Initialize Map etc
+     */
+    this.init = function () {
+        $.get("/config", function(result) { ghbase = result["ghbase"]; });
+
+		const map = new maplibregl.Map({ container: 'map',
+			style: 'spacedon.json',
+			center: [13, 51],
+			zoom: 6
+		}); 
+		map.addControl(new maplibregl.NavigationControl());
+
+        const startMarker = new maplibregl.Marker({color: "#00FF00", draggable: true}).setLngLat([0, 0]);
+        const finishMarker = new maplibregl.Marker({color: "#FF0000", draggable: true}).setLngLat([0, 0]);
+        startMarker.on("dragend", function() {lib.doRouting(map, startMarker.getLngLat(), finishMarker.getLngLat());});
+        finishMarker.on("dragend", function() {lib.doRouting(map, startMarker.getLngLat(), finishMarker.getLngLat());});
+		const viaMarkers = new Array();
+
+		map.on('mousemove', function (e) {
+			var features = map.queryRenderedFeatures(e.point);
+			// Limit the number of properties we're displaying for
+			// legibility and performance
+			var displayProperties = [ 'type', 'properties', 'id', 'layer', 'source', 'sourceLayer', 'state' ];
+			var displayFeatures = features.map(function (feat) {
+				var displayFeat = {};
+				displayProperties.forEach(function (prop) {
+					displayFeat[prop] = feat[prop];
+				});
+				return displayFeat;
+			});
+			document.getElementById('features').innerHTML = JSON.stringify( displayFeatures, null, 2 );
+		});
+		map.on('click', function (e) {
+			let coordinates = e.lngLat;
+
+			// Ensure that if the map is zoomed out such that multiple
+			// copies of the feature are visible, the popup appears
+			// over the copy being pointed to.
+			while (Math.abs(e.lngLat.lng - coordinates[0]) > 180) {
+				coordinates[0] += e.lngLat.lng > coordinates[0] ? 360 : -360;
+			}
+
+			const contextmenu = new maplibregl.Popup()
+				.setLngLat(coordinates)
+				.setHTML('<button id="btn-start">start</button></br><button id="btn-via">via</button></br><button id="btn-finish">finish</button>')
+				.addTo(map);
+
+            let startbtn = document.getElementById("btn-start");
+            startbtn.onclick = function () {
+                contextmenu.remove();
+                startMarker.setLngLat([coordinates.lng, coordinates.lat]).addTo(map);
+                startMarker.onMap = true;
+                if (finishMarker.onMap) {
+                    lib.doRouting(map, coordinates, finishMarker.getLngLat());
+                }
+            };
+            let finishbtn = document.getElementById("btn-finish");
+            finishbtn.onclick = function () {
+                contextmenu.remove();
+                finishMarker.setLngLat([coordinates.lng, coordinates.lat]).addTo(map);
+                finishMarker.onMap = true;
+                if (startMarker.onMap) {
+                    lib.doRouting(map, startMarker.getLngLat(), coordinates);
+                }
+            };
+		});
+    };
+
+    this.doRouting = function (map, start, finish, vias = undefined, vehicle = "foot") {
+        const s = [start.lat, start.lng];
+        let data = {
+            points: [
+                [start.lng, start.lat]
+            ],
+            profile: vehicle,
+            points_encoded: false
+        };
+        if (vias != undefined && vias.length > 0) {
+
+        }
+        data.points.push([finish.lng, finish.lat])
+        $.ajax({
+            type: "POST",
+            url: ghbase + "/route",
+            data: JSON.stringify(data),
+            contentType: "application/json",
+            success: function (result) {
+                if(map.getLayer("route") !== undefined) {
+                    map.removeLayer("route");
+                }
+                if(map.getSource("ghroute") !== undefined) {
+                    map.removeSource("ghroute");
+                }
+
+                map.addSource("ghroute", {
+                    "type": "geojson",
+                    "data": {
+                        "type": "Feature",
+                        "geometry": result.paths[0].points
+                    }
+                });
+                map.addLayer({
+                    "id": "route",
+                    "type": "line",
+                    "source": "ghroute",
+                    "layout": {
+                        "line-join": "round",
+                        "line-cap": "round"
+                    },
+                    "paint": {
+                        "line-color": "#f00",
+                        "line-width": 9
+                    }
+                });
+            },
+            dataType: "json"
+        });
     };
 };