Update buzzer app to serve static files and handle WebSocket connections

Integrates static file serving for HTML, CSS, and JS, and sets up a WebSocket server for real-time communication.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: f3ac8eb3-f610-4678-ab6e-ebf900098be4
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Replit-Commit-Event-Id: 182c9671-a459-4b94-a7eb-1c7a0cefe768
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server/routes.ts

@@ -1,16 +1,46 @@
 import type { Express } from "express";
 import { createServer, type Server } from "http";
-import { storage } from "./storage";
+import { WebSocketServer } from "ws";
+import fs from "fs";
+import path from "path";
+import { handleMessage, handleClose } from "./buzzer-ws";
 
 export async function registerRoutes(
   httpServer: Server,
   app: Express
 ): Promise<Server> {
-  // put application routes here
-  // prefix all routes with /api
+  // Serve buzzer static files
+  const publicDir = path.resolve(process.cwd(), "src/public");
 
-  // use storage to perform CRUD operations on the storage interface
-  // e.g. storage.insertUser(user) or storage.getUserByUsername(username)
+  app.get("/", (_req, res) => {
+    res.setHeader("Content-Type", "text/html; charset=utf-8");
+    res.send(fs.readFileSync(path.join(publicDir, "index.html"), "utf-8"));
+  });
+
+  app.get("/styles.css", (_req, res) => {
+    res.setHeader("Content-Type", "text/css");
+    res.send(fs.readFileSync(path.join(publicDir, "styles.css"), "utf-8"));
+  });
+
+  app.get("/script.js", (_req, res) => {
+    res.setHeader("Content-Type", "text/javascript");
+    res.send(fs.readFileSync(path.join(publicDir, "script.js"), "utf-8"));
+  });
+
+  // WebSocket server for buzzer
+  const wss = new WebSocketServer({ server: httpServer, path: "/ws" });
+
+  wss.on("connection", (ws) => {
+    ws.on("message", (data) => {
+      if (typeof data === "string") {
+        handleMessage(ws, data);
+      } else {
+        handleMessage(ws, data.toString());
+      }
+    });
+    ws.on("close", () => handleClose(ws));
+    ws.on("error", () => { try { ws.close(); } catch {} });
+  });
 
   return httpServer;
 }