Adding event support to items

back/src/Model/Websocket/ItemEventMessage.ts

@@ -0,0 +1,10 @@
+import * as tg from "generic-type-guard";
+
+export const isItemEventMessageInterface =
+    new tg.IsInterface().withProperties({
+        itemId: tg.isNumber,
+        event: tg.isString,
+        state: tg.isUnknown,
+        parameters: tg.isUnknown,
+    }).get();
+export type ItemEventMessageInterface = tg.GuardedType<typeof isItemEventMessageInterface>;

back/src/Model/World.ts

@@ -27,6 +27,8 @@ export class World {
     private readonly groupUpdatedCallback: GroupUpdatedCallback;
     private readonly groupDeletedCallback: GroupDeletedCallback;
 
+    private itemsState: Map<number, unknown> = new Map<number, unknown>();
+
     constructor(connectCallback: ConnectCallback,
                 disconnectCallback: DisconnectCallback,
                 minDistance: number,
@@ -227,6 +229,14 @@ export class World {
         return Math.sqrt(Math.pow(position2.x - position1.x, 2) + Math.pow(position2.y - position1.y, 2));
     }
 
+    public setItemState(itemId: number, state: unknown) {
+        this.itemsState.set(itemId, state);
+    }
+
+    public getItemsState(): Map<number, unknown> {
+        return this.itemsState;
+    }
+
     /*getDistancesBetweenGroupUsers(group: Group): Distance[]
     {
         let i = 0;