Add MapComplete

Logic/ElementStorage.ts

@@ -0,0 +1,56 @@
+/**
+ * Keeps track of a dictionary 'elementID' -> element
+ */
+import {UIEventSource} from "../UI/UIEventSource";
+
+export class ElementStorage {
+
+    private _elements = [];
+
+    constructor() {
+
+    }
+
+    addElementById(id: string, eventSource: UIEventSource<any>) {
+        this._elements[id] = eventSource;
+    }
+
+    addElement(element): UIEventSource<any> {
+        const eventSource = new UIEventSource<any>(element.properties);
+        this._elements[element.properties.id] = eventSource;
+        return eventSource;
+    }
+
+    addOrGetElement(element: any) {
+        const elementId = element.properties.id;
+        if (elementId in this._elements) {
+            const es = this._elements[elementId];
+            const keptKeys = es.data;
+            // The element already exists
+            // We add all the new keys to the old keys
+            for (const k in element.properties) {
+                const v = element.properties[k];
+                if (keptKeys[k] !== v) {
+                    keptKeys[k] = v;
+                    es.ping();
+                }
+            }
+
+            return es;
+        }else{
+            return this.addElement(element);
+        }
+    }
+
+    getElement(elementId): UIEventSource<any> {
+        if (elementId in this._elements) {
+            return this._elements[elementId];
+        }
+        console.log("Can not find eventsource with id ", elementId);
+    }
+
+
+    removeId(oldId: string) {
+        delete this._elements[oldId];
+    }
+}