Advanced Node and Express - Set up the Environment

client.js

$(document).ready(function () {
  /*global io*/
  let socket = io();
  
  // Form submittion with new message in field with id 'm'
  $('form').submit(function () {
    var messageToSend = $('#m').val();

    $('#m').val('');
    return false; // prevent form submit from refreshing page
  });
});

routes.js

const passport = require('passport');
const bcrypt = require('bcrypt');

module.exports = function (app, myDataBase) {
  app.route('/').get((req, res) => {
    res.render('index', {
      title: 'Connected to Database',
      message: 'Please log in',
      showLogin: true,
      showRegistration: true,
      showSocialAuth: true
    });
  });

  app.route('/login').post(passport.authenticate('local', { failureRedirect: '/' }), (req, res) => {
    res.redirect('/profile');
  });

  app.route('/profile').get(ensureAuthenticated, (req,res) => {
    res.render('profile', { username: req.user.username });
  });

  app.route('/logout').get((req, res) => {
    req.logout();
    res.redirect('/');
  });

  app.route('/register').post((req, res, next) => {
    const hash = bcrypt.hashSync(req.body.password, 12);
    myDataBase.findOne({ username: req.body.username }, (err, user) => {
      if (err) {
        next(err);
      } else if (user) {
        res.redirect('/');
      } else {
        myDataBase.insertOne({
          username: req.body.username,
          password: hash
        },
          (err, doc) => {
            if (err) {
              res.redirect('/');
            } else {
              // The inserted document is held within
              // the ops property of the doc
              next(null, doc.ops[0]);
            }
          }
        )
      }
    })
  },
    passport.authenticate('local', { failureRedirect: '/' }),
    (req, res, next) => {
      res.redirect('/profile');
    }
  );

  app.route('/auth/github').get(passport.authenticate('github'));
  app.route('/auth/github/callback').get(passport.authenticate('github', { failureRedirect: '/' }), (req, res) => {
    res.session.user_id = req.user.id;
    res.redirect("/chat");
  })

  app.use((req, res, next) => {
    res.status(404)
      .type('text')
      .send('Not Found');
  });
}

function ensureAuthenticated(req, res, next) {
    if (req.isAuthenticated()) {
        return next();
    }
    res.redirect('/');
}; 

server.js

'use strict';
require('dotenv').config();
const express = require('express');
const myDB = require('./connection');
const fccTesting = require('./freeCodeCamp/fcctesting.js');
const session = require('express-session');
const passport = require('passport');
const routes = require('./routes.js');
const auth = require('./auth.js');

const app = express();

const http = require('http').createServer(app);
const io = require('socket.io')(http);

app.set('view engine', 'pug');
app.set('views', './views/pug');

app.use(session({
  secret: process.env.SESSION_SECRET,
  resave: true,
  saveUninitialized: true,
  cookie: { secure: false }
}));

app.use(passport.initialize());
app.use(passport.session());

fccTesting(app); // For fCC testing purposes
app.use('/public', express.static(process.cwd() + '/public'));
app.use(express.json());
app.use(express.urlencoded({ extended: true }));

myDB(async client => {
  const myDataBase = await client.db('database').collection('users');

  routes(app, myDataBase);
  auth(app, myDataBase);

  io.on('connection', socket => {
    console.log('A user has connected');
  });
  
}).catch(e => {
  app.route('/').get((req, res) => {
    res.render('index', { title: e, message: 'Unable to connect to database' });
  });
});
  
const PORT = process.env.PORT || 3000;
http.listen(PORT, () => {
  console.log(`Listening on port ${PORT}`);
});