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

server.listen(process.env.PORT||8000);