socket io stuff entered

backend/socket.io/roomService.socket.ts

@@ -0,0 +1,73 @@
+import type { Server } from "socket.io";
+import { createLogger } from "../logger/logger.controller.js";
+import {
+	FLUSH_INTERVAL,
+	MAX_HISTORY,
+	roomBuffers,
+	roomFlushTimers,
+	roomHistory,
+} from "./roomCache.socket.js";
+import { roomDefinition } from "./roomDefinitions.socket.js";
+import type { RoomId } from "./types.socket.js";
+
+// get the db data if not exiting already
+const log = createLogger({ module: "socket.io", subModule: "roomService" });
+
+export const preseedRoom = async (roomId: RoomId) => {
+	if (roomHistory.has(roomId)) {
+		return roomHistory.get(roomId);
+	}
+
+	const roomDef = roomDefinition[roomId];
+
+	if (!roomDef) {
+		log.error({}, `Room ${roomId} is not defined`);
+	}
+
+	const latestData = await roomDef.seed(MAX_HISTORY);
+
+	roomHistory.set(roomId, latestData);
+
+	return latestData;
+};
+
+export const createRoomEmitter = (io: Server) => {
+	const addDataToRoom = <T>(roomId: RoomId, payload: T) => {
+		if (!roomHistory.has(roomId)) {
+			roomHistory.set(roomId, []);
+		}
+
+		const history = roomHistory.get(roomId)!;
+		history?.push(payload);
+
+		if (history?.length > MAX_HISTORY) {
+			history?.shift();
+		}
+
+		if (!roomBuffers.has(roomId)) {
+			roomBuffers.set(roomId, []);
+		}
+
+		roomBuffers.get(roomId)!.push(payload);
+
+		if (!roomFlushTimers.has(roomId)) {
+			const timer = setTimeout(() => {
+				const buffered = roomBuffers.get(roomId) || [];
+
+				if (buffered.length > 0) {
+					io.to(roomId).emit("room-update", {
+						roomId,
+						payloads: buffered, // ✅ array now
+					});
+				}
+
+				roomBuffers.set(roomId, []);
+				roomFlushTimers.delete(roomId);
+			}, FLUSH_INTERVAL);
+
+			roomFlushTimers.set(roomId, timer);
+		}
+	};
+
+	return { addDataToRoom };
+};