feat: add socket server for notification

src/app.ts

@@ -6,10 +6,13 @@ import swaggerUi from "swagger-ui-express";
 import swaggerDocument from "./swagger.json";
 import error from "./middlewares/error";
 import { RegisterRoutes } from "./routes";
+import { initWebSocket } from "./services/socket";
 
 async function main() {
   const app = express();
 
+  initWebSocket(+(process.env.SOCKET_PORT || 3001));
+
   app.use(cors());
   app.use(express.json());
   app.use(express.urlencoded({ extended: true }));

src/services/socket.ts

@@ -0,0 +1,69 @@
+import { Server } from "socket.io";
+
+let io: Server;
+
+export function initWebSocket(port?: number) {
+  if (io) return;
+
+  io = new Server({ cors: { origin: "*" }, path: "/api/v1/backup-socket" });
+
+  io.use(async (socket, next) => {
+    const token = socket.handshake.auth.token;
+
+    const res = await fetch(`${process.env.AUTH_REALM_URL}/protocol/openid-connect/userinfo`, {
+      headers: { authorization: `Bearer ${token}` },
+    }).catch((e) => console.error(e));
+
+    if (res?.ok) {
+      socket.data.user = await res.json();
+    }
+
+    next();
+  });
+
+  io.on("connection", (ws) => {
+    console.log("✅ Client connected to WebSocket");
+
+    ws.on("close", () => {
+      console.log("❌ Client disconnected");
+    });
+
+    ws.on("error", (error: any) => {
+      console.error("WebSocket error:", error);
+    });
+  });
+
+  io.listen(port || 3001);
+}
+
+export async function sendWebSocket(
+  event: string,
+  data: any,
+  opts?: {
+    roles?: string[];
+    userId?: string[];
+  },
+) {
+  if (!io) initWebSocket();
+
+  for (let [id, session] of io.of("/").sockets) {
+    const user: {
+      sub: string;
+      name: string;
+      given_name: string;
+      family_name: string;
+      preferred_username: string;
+      email: string;
+      role: string[];
+    } = session.data.user;
+
+    if (!user) continue;
+
+    if (
+      user.role?.some((v) => opts?.roles?.includes(v)) ||
+      opts?.userId?.some((v) => user.sub === v)
+    ) {
+      io.to(id).emit(event, JSON.stringify(data));
+    }
+  }
+}