app.js

const express = require('express');
const path = require('path');
const mongoose = require('mongoose');
const bodyParser = require('body-parser');
const expressValidator = require('express-validator');
const flash = require('connect-flash');
const session = require('express-session');
const passport = require('passport');
const io = require('socket.io')();
const config = require('./config/database');

mongoose.connect('mongodb://tareq:tareq@ds145263.mlab.com:45263/lrp');
let db = mongoose.connection;

// Check connection
db.once('open', function(){
  console.log('Connected to MongoDB');
});

// Check for DB errors
db.on('error', function(err){
  console.log(err);
});

// Init App
const app = express();


// Load View Engine
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'pug');

// Body Parser Middleware
// parse application/x-www-form-urlencoded
app.use(bodyParser.urlencoded({ extended: false }));
// parse application/json
app.use(bodyParser.json());

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

// Express Session Middleware
app.use(session({
  secret: 'keyboard cat',
  resave: true,
  saveUninitialized: true
}));

// Express Messages Middleware
app.use(require('connect-flash')());
app.use(function (req, res, next) {
  res.locals.messages = require('express-messages')(req, res);
  next();
});

// Express Validator Middleware
app.use(expressValidator({
  errorFormatter: function(param, msg, value) {
      var namespace = param.split('.')
      , root    = namespace.shift()
      , formParam = root;

    while(namespace.length) {
      formParam += '[' + namespace.shift() + ']';
    }
    return {
      param : formParam,
      msg   : msg,
      value : value
    };
  }
}));



// Passport Config
require('./config/passport')(passport);

// Passport Middleware
app.use(passport.initialize());
app.use(passport.session());

app.get('*', function(req, res, next){
  res.locals.user = req.user || null;
  next();
});

// Home Route
app.get('/', function(req, res){
      res.render('index', {
        title:'HomePage',
      });
  });


// Route Files
app.use(require('./routes/chat'));
let users = require('./routes/users');
app.use('/users', users);

// Start Server
var server = app.listen(3000, function(){
  console.log('Server started on port 3000...');
});

io.attach(server);
io.on('connection', function(socket) {
  socket.on('postMessage', function(data) {
    io.emit('updateMessages', data);
  });
});