server.js

const express = require('express');
const path = require('path');
const app = express();
const server = require('http').createServer(app);
const cors = require('cors');
app.use(cors());
const bcrypt = require('bcrypt');
const jwt = require('jsonwebtoken');
const io = require('socket.io')(server, {
    cors: {
        origin: '*',
        methods: ['GET', 'POST'],
    },
});

const PORT = process.env.PORT || 5000;
app.use(require('./router/auth'));

app.use(express.json());
app.use(express.urlencoded({ extended: true }));

app.use(express.static(path.join(__dirname, 'client/build')));

app.get('/*', (req, res) => {
    res.sendFile(path.join(__dirname, 'client/build', 'index.html'));
});

if (process.env.NODE_ENV === 'production') {
    app.use(express.static('client/build'));
}

app.post('/hash', async (req, res) => {
    const secPass = await bcrypt.hash(req.body.password, 10);
    res.json({ secPass });
});

app.post('/login', async (req, res) => {
    const email = req.body.email;
    const userPass = req.body.userPass;
    const correctPass = req.body.correctPass;
    const token = jwt.sign({ email }, 'jwtSecret', {
        expiresIn: '10d',
    });
    if (await bcrypt.compare(userPass, correctPass)) {
        res.json({ auth: true, token: token });
    } else {
        res.json({ auth: false });
    }
});
const users = {};

io.on('connection', (socket) => {
    console.log('ready to use');
    socket.on('join-room', (roomId, email) => {
        users[email] = true;
        console.log('joined---', roomId, email);
        socket.join(roomId);
        // socket.to(roomId).emit('user-connected', users);
        io.to(roomId).emit('user-connected', users);

        socket.on('disconnect', () => {
            console.log('left---', email);
            users[email] = false;
            delete users[email];
            // socket.to(roomId).emit('user-disconnected', users);
            io.to(roomId).emit('user-disconnected', users);
            // console.log(users);
        });
    });

    socket.on('new-announcement', (roomId) => {
        console.log('new announcement on server');
        socket.join(roomId);
        socket.broadcast.to(roomId).emit('show-announcement',"hello");
    });
});

server.listen(PORT, () => {
    console.log(`server running at http://127.0.0.1:${PORT}`);
});