OsmObjects can now be used as featureSource, load selected object immediately, zoom to selected object on open; fix #191

Logic/FeatureSource/OsmApiFeatureSource.ts

@@ -0,0 +1,21 @@
+import FeatureSource from "./FeatureSource";
+import {UIEventSource} from "../UIEventSource";
+import {OsmObject} from "../Osm/OsmObject";
+
+
+export default class OsmApiFeatureSource implements FeatureSource {
+    public readonly features: UIEventSource<{ feature: any; freshness: Date }[]> = new UIEventSource<{ feature: any; freshness: Date }[]>([]);
+    public readonly name: string = "OsmApiFeatureSource";
+   
+    
+    public load(id: string){
+        console.log("Updating from OSM API: ", id)
+        OsmObject.DownloadObject(id, (element, meta) => {
+            const geojson = element.asGeoJson();
+            console.warn(geojson)
+            geojson.id = geojson.properties.id;
+            this.features.setData([{feature:geojson, freshness: meta["_last_edit:timestamp"]}])
+        })
+    }
+
+}