WIP tracked POIs

main.js

@@ -7,7 +7,7 @@ import Point from 'ol/geom/Point';
 import {Tile as TileLayer, Vector as VectorLayer} from 'ol/layer';
 import {Circle as CircleStyle, Fill, Icon, Stroke, Style} from 'ol/style';
 import {OSM, Vector as VectorSource} from 'ol/source';
-import {useGeographic} from 'ol/proj';
+import {useGeographic, fromLonLat} from 'ol/proj';
 import geojsonRoute from './geo/route.json'
 import geojsonPOI from './geo/poi.json'
 
@@ -96,17 +96,18 @@ const poiLayer = new VectorLayer({
   style: styles.circleBlack,
 });
 
-const vectorSourceVan = new VectorSource();
+const vectorSourceTrackedPoints = new VectorSource();
 
 const vanFeature= new Feature({
-  geometry: new Point([ 12.498556, 45.780383 ]),
-  name: 'Support Van'
+  geometry: new Point([8.918618, 44.407408]),
+  name: 'Support Van',
+  trackable: true
 });
 
-vectorSourceVan.addFeature(vanFeature);
+vectorSourceTrackedPoints.addFeature(vanFeature);
 
-const vanLayer = new VectorLayer({
-  source: vectorSourceVan,
+const trackedPointsLayer = new VectorLayer({
+  source: vectorSourceTrackedPoints,
   style: styles.iconVan
 });
 
@@ -119,6 +120,8 @@ const view = new View({
   zoom: 6.6
 })
 
+window.view = view;
+
 const map = new Map({
   target: 'map',
   layers: [
@@ -128,7 +131,7 @@ const map = new Map({
     stagesCompletedLayer,
     stagesAheadLayer,
     poiLayer,
-    vanLayer
+    trackedPointsLayer
   ],
   view: view
 });
@@ -153,6 +156,26 @@ function disposePopover() {
   }
 }
 
+function createPopoverHtml(feature) {
+  const container = document.createElement('div');
+  container.className = 'popover-content';
+  const title = document.createElement('div');
+  title.textContent = feature.get('name');
+  container.append(title);
+
+  if (feature.get('trackable')) {
+    const linkParent = document.createElement('div');
+    const followLink = document.createElement('a');
+    followLink.textContent = "Follow";
+    followLink.addEventListener('click', console.log(feature, followLink));
+    // followLink.addEventListener('click', startFollowing(feature, followLink));
+    linkParent.append(followLink);
+    container.append(linkParent);
+  }
+
+  return container.innerHTML;
+}
+
 // display popup on click
 map.on('click', function (evt) {
   const feature = map.forEachFeatureAtPixel(evt.pixel, function (feature) {
@@ -166,7 +189,7 @@ map.on('click', function (evt) {
   popover = new bootstrap.Popover(popupEl, {
     placement: 'top',
     html: true,
-    content: feature.get('name'),
+    content: createPopoverHtml(feature)
   });
   popover.show();
 });
@@ -180,3 +203,50 @@ map.on('pointermove', function (evt) {
 
 // Close the popup when the map is moved
 map.on('movestart', disposePopover);
+
+
+//
+// Tracking
+//
+
+const updateInterval = 5000;
+let followedFeature = vanFeature;
+// let followedFeature = null;
+
+function startFollowing(feature, followLink) {
+  followedFeature = feature;
+  followLink.textContent = 'Stop following';
+  // followLink.removeEventListener('click', startFollowing);
+  followLink.addEventListener('click', stopFollowing(feature, followLink));
+}
+
+function stopFollowing(feature, followLink) {
+  followedFeature = null;
+  followLink.textContent = 'Stop following';
+  // followLink.removeEventListener('click', stopFollowing);
+  followLink.addEventListener('click', startFollowing(feature, followLink));
+}
+
+function updateData(startInterval=false) {
+  fetch('https://r2b22.kip.pe/last.json')
+    .then(response => response.json())
+    .then(data => {
+      console.log(data);
+      const coords = [data.lon, data.lat];
+      vanFeature.getGeometry().setCoordinates(coords);
+
+      if (followedFeature) {
+        view.animate({
+          center: followedFeature.getGeometry().getCoordinates(),
+          duration: 500,
+          zoom: 13
+        });
+      }
+    });
+
+  if (startInterval) {
+    setInterval(updateData, updateInterval);
+  }
+}
+
+updateData(true);