Chore: use strict on two classes

src/Logic/FeatureSource/Sources/StaticFeatureSource.ts

@@ -1,7 +1,8 @@
-import { FeatureSource } from "../FeatureSource"
-import { ImmutableStore, Store } from "../../UIEventSource"
+import { FeatureSource, WritableFeatureSource } from "../FeatureSource"
+import { ImmutableStore, Store, UIEventSource } from "../../UIEventSource"
 import { Feature } from "geojson"
 
+"use strict"
 /**
  * A simple, read only feature store.
  */
@@ -30,3 +31,28 @@ export default class StaticFeatureSource<T extends Feature = Feature> implements
         return new StaticFeatureSource(geojson)
     }
 }
+
+export class WritableStaticFeatureSource<T extends Feature = Feature> implements WritableFeatureSource<T> {
+    public readonly features: UIEventSource<T[]> = undefined
+
+    constructor(features: UIEventSource<T[]> | T[] | { features: T[] } | { features: Store<T[]> }) {
+        if (features === undefined) {
+            throw "Static feature source received undefined as source"
+        }
+
+        let feats: T[] | UIEventSource<T[]>
+
+        if (features["features"]) {
+            feats = features["features"]
+        } else {
+            feats = <T[] | UIEventSource<T[]>>features
+        }
+
+        if (Array.isArray(feats)) {
+            this.features = new UIEventSource<T[]>(feats)
+        } else {
+            this.features = feats
+        }
+
+    }
+}