server.js

const express = require('express');
const app = express();
const server = require('http').Server(app);
const io = require('socket.io')(server);
const { v4: uuidv4 } = require('uuid');
const { ExpressPeerServer }  = require('peer');
const peerServer = ExpressPeerServer(server, {
    debug:true
});

app.set('view engine', 'ejs');
app.use(express.static('public'));
app.use('/peerjs', peerServer);

app.get('/', (req, res) => {
    res.redirect(`/${uuidv4()}`)
});

app.get('/: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).emit('user-connected', userId);
       
       socket.on('message', (message) => {
           io.to(roomId).emit('createMessage', message)
       });
    })
})


server.listen(process.env.PORT||3030);