Move modern to the top

1 files changed, 52 insertions, 0 deletions

diff --git a/src/map/main/MapDefaultCamera.js b/src/map/main/MapDefaultCamera.js
new file mode 100644
index 00000000..90b3061b
--- /dev/null
+++ b/src/map/main/MapDefaultCamera.js
@@ -0,0 +1,52 @@
+import maplibregl from 'maplibre-gl';
+import { useEffect, useState } from 'react';
+import { useSelector } from 'react-redux';
+import { usePreference } from '../../common/util/preferences';
+import { map } from '../core/MapView';
+
+const MapDefaultCamera = () => {
+  const selectedDeviceId = useSelector((state) => state.devices.selectedId);
+  const positions = useSelector((state) => state.session.positions);
+
+  const defaultLatitude = usePreference('latitude');
+  const defaultLongitude = usePreference('longitude');
+  const defaultZoom = usePreference('zoom', 0);
+
+  const [initialized, setInitialized] = useState(false);
+
+  useEffect(() => {
+    if (selectedDeviceId) {
+      setInitialized(true);
+    } else if (!initialized) {
+      if (defaultLatitude && defaultLongitude) {
+        map.jumpTo({
+          center: [defaultLongitude, defaultLatitude],
+          zoom: defaultZoom,
+        });
+        setInitialized(true);
+      } else {
+        const coordinates = Object.values(positions).map((item) => [item.longitude, item.latitude]);
+        if (coordinates.length > 1) {
+          const bounds = coordinates.reduce((bounds, item) => bounds.extend(item), new maplibregl.LngLatBounds(coordinates[0], coordinates[1]));
+          const canvas = map.getCanvas();
+          map.fitBounds(bounds, {
+            duration: 0,
+            padding: Math.min(canvas.width, canvas.height) * 0.1,
+          });
+          setInitialized(true);
+        } else if (coordinates.length) {
+          const [individual] = coordinates;
+          map.jumpTo({
+            center: individual,
+            zoom: Math.max(map.getZoom(), 10),
+          });
+          setInitialized(true);
+        }
+      }
+    }
+  }, [selectedDeviceId, initialized, defaultLatitude, defaultLongitude, defaultZoom, positions]);
+
+  return null;
+};
+
+export default MapDefaultCamera;