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/users');

const app = express();

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

const botName = 'iChat BOT';

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

// Run when client connexts
io.on('connection', socket => {
    // console.log('New Web Socket connection...');

    socket.on('joinRoom', ({ username, room }) => {
        const user = userJoin(socket.id, username, room);
        
        socket.join(user.room);

        // Welcome current user
        socket.emit('message', formatMessage(botName, 'Welcome to iChat'));

        // 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)
        });

    });
    
    // Runs when client disconects
    socket.on('disconnect', () => {
        const user = userLeave(socket.id);

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

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

        }

    });
    // message to all the clients
    // io.emit();
    
    // Listen for chatMessage
    socket.on('chatMessage', msg => {
        // console.log(msg);

        const user = getCurrentUser(socket.id);

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

const PORT = process.env.PORT || 5000;

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