Show replay path

2 files changed, 59 insertions, 24 deletions

diff --git a/modern/src/map/ReplayPathMap.js b/modern/src/map/ReplayPathMap.js
new file mode 100644
index 0000000..feab071
--- /dev/null
+++ b/modern/src/map/ReplayPathMap.js
@@ -0,0 +1,59 @@
+import mapboxgl from 'mapbox-gl';
+import { useEffect } from 'react';
+import { map } from './Map';
+
+const ReplayPathMap = ({ positions }) => {
+  const id = 'replay';
+
+  useEffect(() => {
+    map.addSource(id, {
+      'type': 'geojson',
+      'data': {
+        type: 'Feature',
+        geometry: {
+          type: 'LineString',
+          coordinates: [],
+        },
+      },
+    });
+    map.addLayer({
+      'source': id,
+      'id': id,
+      'type': 'line',
+      'layout': {
+        'line-join': 'round',
+        'line-cap': 'round',
+      },
+      'paint': {
+         'line-color': '#333',
+         'line-width': 5,
+      },
+    });
+
+    return () => {
+      map.removeLayer(id);
+      map.removeSource(id);
+    };
+  }, []);
+
+  useEffect(() => {
+    const coordinates = positions.map(item => [item.longitude, item.latitude]);
+    map.getSource(id).setData({
+      type: 'Feature',
+      geometry: {
+        type: 'LineString',
+        coordinates: coordinates,
+      },
+    });
+    if (coordinates.length) {
+      const bounds = coordinates.reduce((bounds, item) => bounds.extend(item), new mapboxgl.LngLatBounds(coordinates[0], coordinates[0]));
+      map.fitBounds(bounds, {
+        padding: { top: 50, bottom: 250, left: 25, right: 25 },
+      });
+    }
+  }, [positions]);
+
+  return null;
+}
+
+export default ReplayPathMap;
diff --git a/modern/src/map/mapUtil.js b/modern/src/map/mapUtil.js
index 71d7b3c..15f1620 100644
--- a/modern/src/map/mapUtil.js
+++ b/modern/src/map/mapUtil.js
@@ -27,30 +27,6 @@ export const loadIcon = async (key, background, url) => {
   return context.getImageData(0, 0, canvas.width, canvas.height);
 };
 
-export const calculateBounds = features => {
-  if (features && features.length) {
-    const first = features[0].geometry.coordinates;
-    const bounds = [[...first], [...first]];
-    for (let feature of features) {
-      const longitude = feature.geometry.coordinates[0]
-      const latitude = feature.geometry.coordinates[1]
-      if (longitude < bounds[0][0]) {
-        bounds[0][0] = longitude;
-      } else if (longitude > bounds[1][0]) {
-        bounds[1][0] = longitude;
-      }
-      if (latitude < bounds[0][1]) {
-        bounds[0][1] = latitude;
-      } else if (latitude > bounds[1][1]) {
-        bounds[1][1] = latitude;
-      }
-    }
-    return bounds;
-  } else {
-    return null;
-  }
-}
-
 export const reverseCoordinates = it => {
   if (!it) {
     return it;