broke down ws

src/ws/state/utils/broadcasting.ts

@@ -0,0 +1,19 @@
+import { UserSocketService } from '../user-socket.service';
+import { WsNotificationService } from '../ws-notification.service';
+
+export class Broadcaster {
+  constructor(
+    private readonly userSocketService: UserSocketService,
+    private readonly wsNotificationService: WsNotificationService,
+  ) {}
+
+  async broadcastToFriends(friends: Set<string>, event: string, payload: any) {
+    const friendIds = Array.from(friends);
+    const friendSockets =
+      await this.userSocketService.getFriendsSockets(friendIds);
+
+    for (const { socketId } of friendSockets) {
+      this.wsNotificationService.emitToSocket(socketId, event, payload);
+    }
+  }
+}