index.js

const express = require("express");
const app = express();
const server = require("http").Server(app);
const io = require("socket.io").listen(server);
const { v4: uuidV4 } = require("uuid");
//require("dotenv").config();

var options = {};
app.set("view engine", "ejs");
app.use(express.static("public"));

app.get("/", (req, res) => {
  res.render("index");
});

app.get("/getroom", (req, res) => {
  res.redirect(`/join/${uuidV4()}`);
});

app.get("/join/:room", (req, res) => {
  res.render("room", { roomId: req.params.room });
});

io.on("connection", (socket) => {
  socket.on("join-room", (roomId, userId) => {
    socket.join(roomId);
    socket.to(roomId).broadcast.emit("user-connected", userId);
    socket.on("disconnect", () => {
      socket.to(roomId).broadcast.emit("user-disconnected", userId);
    });
  });
});
server.listen(process.env.PORT || 3000, () => {
  console.log("serever is running on port" + process.env.PORT || 3000);
});