index.js

// import our js libraries
require('dotenv').config();
const express = require('express');
const path = require('path');
const app = express();
const session = require('express-session');
const http = require('http').createServer(app);
const io = require('socket.io')(http);

// configure our application level middleware
const bodyparser = require('body-parser');
const cookieparser = require('cookie-parser');
const twilioNotificatations = require('./server/middleware/twilioNotifications');
const { isUserRequest, isSessionRequest } = require('./server/middleware/auth');
if (process.env.NODE_ENV === 'development') {
  const morgan = require('morgan');
  app.use(morgan('dev'));
}
app.use('/', express.static('./dist'));
app.use('/api', bodyparser.json());
app.use(cookieparser());
app.use(session({
  secret: process.env.__API_SECRET__,
  resave: true,
  saveUninitialized: true,
}))
const PORT = process.env.PORT || 3000;

const { handleUserConnection, handleRegistration, handleLogout } = require('./server/controller/user');
const { handleMessage } = require('./server/controller/message');

/**
 * Socket configuration for client events
 * 
 * Events:
 *  @register - emits when a user registers a username.
 *  @logout - emits when a new user logs out.
 *  @message - emits a message to users when users send a message.
 *  @connected - emits when a user connects to server
 *  @disconnect -  emits when a user disconnects ends server connection
 * 
 */
io.on('connection', function (socket) {
  socket.on('register', function (user) {
    io.emit('register', user);
  });

  socket.on('logout', function (user) {
    io.emit('logout', user);
  });

  socket.on('message', function (msg) {
    io.emit('message', msg);
  });

  socket.on('connected', async function (user) {
    socket.user = user;
    let userConnection = await handleUserConnection(socket.user, true);
    io.emit('isOnline', userConnection);
  })
  socket.on('disconnect', async function () {
    let userConnection = await handleUserConnection(socket.user, false);
    io.emit('isOffline', userConnection);
  });
});

/**
 * Routes to our server controllers
 */
app.post('/api/register', isUserRequest, handleRegistration);
app.post('/api/logout', isUserRequest, handleLogout);
app.post('/api/message', isSessionRequest, twilioNotificatations.notifyOnMessage, handleMessage)

/**
 * Serves our entry file for our compiled react applications
 */
app.get(['/', '/:username'], (req, res) => {
  if (req.cookies.session_user) {
    req.session.user_id = req.cookies.session_user;
  }
  res.sendFile(path.join(__dirname, './public', 'index.html'));
});

http.listen(PORT, () => {
  console.log(`Cosmic Messenger listening on port : ${PORT}`);
});