phaserLayers managed by Gamemap

Implementation of LayersFlattener
Implementation of Setting properties of a layer form script
Update show/hide layer form script
Update unit test of LayersIteratorTest

front/src/Phaser/Map/LayersFlattener.ts

@@ -0,0 +1,22 @@
+import {ITiledMap, ITiledMapLayer} from "./ITiledMap";
+
+/**
+ * Flatten the grouped layers
+ */
+export function flattenGroupLayersMap(map: ITiledMap) {
+    let flatLayers: ITiledMapLayer[] = [];
+    flattenGroupLayers(map.layers, '', flatLayers);
+    return flatLayers;
+}
+
+function flattenGroupLayers(layers : ITiledMapLayer[], prefix : string, flatLayers: ITiledMapLayer[]) {
+    for (const layer of layers) {
+        if (layer.type === 'group') {
+            flattenGroupLayers(layer.layers, prefix + layer.name + '/', flatLayers);
+        } else {
+            const layerWithNewName = { ...layer };
+            layerWithNewName.name = prefix+layerWithNewName.name;
+            flatLayers.push(layerWithNewName);
+        }
+    }
+}