index.js

const express = require('express');
const env = require('./config/environment');
const cookieParser = require('cookie-parser');
const app = express();
//const port = 7000;
const port = 8000;
const expressLayouts = require('express-ejs-layouts');
const db = require('./config/mongoose');
//used to session cookie
const session = require('express-session');
const passport = require('passport');
const passportLocal = require('./config/passport-local-strategy');
const passportJWT = require('./config/passport-jwt-strategy');
const passportGoogle = require('./config/passport-google-oauth2-strategy');

const MongoStore = require('connect-mongo')(session);
const sassMiddleware = require('node-sass-middleware');
const flash = require('connect-flash');
const customMware = require('./config/middleware');

// setup the chat server to be used with socket.io
const chatServer = require('http').Server(app);
const chatSockets = require('./config/chat_sockets').chatSockets(chatServer);
chatServer.listen(5000);
console.log('chat server is listening on port 5000');

const path = require('path');

app.use(sassMiddleware({
    src: path.join(__dirname, env.asset_path, 'scss'),
    dest: path.join(__dirname, env.asset_path, 'css'),
    debug: true,
    outputStyle: 'extended',
    prefix: '/css'
}));

app.use(express.urlencoded());

app.use(cookieParser());

app.use(express.static(env.asset_path));
// make the uploads path available to the browser
app.use('/uploads', express.static(__dirname + '/uploads'));

app.use(expressLayouts);
//app.use(express.static('./assets'));
//extract style and scripts from sub pages into the layout
app.set('layout extractStyles', true);
app.set('layout extractScripts', true);



// set up the view engine
app.set('view engine', 'ejs');
app.set('views', './views');


//mongo store is used to store the session cookie in the db
app.use(session({
    name: 'codeial',
    //Todo change the secret before deployment in production mode
    secret: env.session_cookie_key,
    saveUninitialized: false,
    resave: false,
    cookie: {
        maxAge: (1000 * 60 * 100)
    },
    store: new MongoStore({
            mongooseConnection: db,
            autoRemove: 'disabled'
        },

        function(err) {
            console.log(err || 'connect-mongodb setup ok');
        }
    )

}));

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


app.use(passport.setAuthenticatedUser);

app.use(flash());
app.use(customMware.setFlash);

//use express router
app.use('/', require('./routes'));


app.listen(port, function(err) {
    if (err) {
        //console.log('Error', err);
        //instead of upper comment we can use next line code and this is called interpolation
        console.log(`Error in ruuning the server: ${err}`);
    }
    //to print port is running
    console.log(`Server is running on port: ${port}`);
});