server.js

const path =require('path');

const http= require('http');

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

const app = express();

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


app.use(express.static(path.join(__dirname,'public')));
const botName ='ChatCord Bot';

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'));  

    socket.broadcast.to(user.room).emit(
        'message', formatMessage(botName, `${user.username} has joined the chat`) );
             
        io.to(user.room).emit('roomUsers',{
            room:user.room,
            users : getRoomUsers(user.room)
        });
        

    });
    
    
    socket.on('chatMessage',msg=>{
        const user = getCurrentUser(socket.id);
        io.to(user.room).emit('message', formatMessage(user.username,msg));


        socket.on('disconnect',()=>{

            const user = userLeave(socket.id);
            if(user){
                io.to(user.room).emit('message', formatMessage(botName,`${user.username} has left the chat`));
                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}'));