server.js

const path = require('path');
const http = require('http');
const express = require('express');
const socketio = require('socket.io');
const formatMessage = require('./utils/messages.js');
const { 
    userJoin, 
    getCurrentUser, 
    userLeave, 
    getRoomUsers
} = require('./utils/users');

const app = express();
const server = http.createServer(app);
const io = socketio(server);

//Set static folder
app.use(express.static(path.join(__dirname, 'public')));

const botName = 'ChatCord bot'

//Run when a client connects
io.on('connection', socket => {
    socket.on('joinRoom', ({username, room}) => {
        
        const user = userJoin(socket.id, username, room);

        socket.join(user.room);

        socket.emit('message', formatMessage(botName, 'Welcome to ChatCord'));

        //Broadcast when a user connects
        socket.broadcast.to(user.room).emit('message', formatMessage(botName, `${user.username} has joined the chat`));

        // Send users and room info
        io.to(user.room).emit('roomUsers', {
            room: user.room,
            users: getRoomUsers(user.room)
        });

    });

   

   //Listen for chat message
   socket.on('chatMessage', (msg) => {

    const user = getCurrentUser(socket.id);

       io.to(user.room).emit('message', formatMessage(user.username , msg));

   });

     //Runs when client disconnect
     socket.on('disconnect', () => {

        const user = userLeave(socket.id);

        if(user)
        {
            io.to(user.room).emit('message', formatMessage(botName, `${user.username} has lefft the chat`));

            // Send users and room info
            io.to(user.room).emit('roomUsers', {
            room: user.room,
            users: getRoomUsers(user.room)
            });
        }
 
    });

    


});

const PORT = 3000 || process.env.PORT;

server.listen(PORT, () => console.log(`Server running on port ${PORT}`));