More refactoring to fix the tests

UI/ShowDataLayer/ShowOverlayLayerImplementation.ts

@@ -0,0 +1,45 @@
+import * as L from "leaflet";
+import TilesourceConfig from "../../Models/ThemeConfig/TilesourceConfig";
+import {UIEventSource} from "../../Logic/UIEventSource";
+import ShowOverlayLayer from "./ShowOverlayLayer";
+
+export default class ShowOverlayLayerImplementation {
+    
+    public static Implement(){
+        ShowOverlayLayer.implementation = ShowOverlayLayerImplementation.AddToMap
+    }
+    
+    public static AddToMap(config: TilesourceConfig,
+                           leafletMap: UIEventSource<any>,
+                           isShown: UIEventSource<boolean> = undefined){
+        leafletMap.map(leaflet => {
+            if (leaflet === undefined) {
+                return;
+            }
+
+            const tileLayer = L.tileLayer(config.source,
+                {
+                    attribution: "",
+                    maxZoom: config.maxzoom,
+                    minZoom: config.minzoom,
+                    // @ts-ignore
+                    wmts: false,
+                });
+
+            if (isShown === undefined) {
+                tileLayer.addTo(leaflet)
+            }
+
+            isShown?.addCallbackAndRunD(isShown => {
+                if (isShown) {
+                    tileLayer.addTo(leaflet)
+                } else {
+                    leaflet.removeLayer(tileLayer)
+                }
+
+            })
+
+        })
+    }
+    
+}