index.js

//setting up express server
//Frame Your Social Space.
const express= require('express');
const env= require('./config/environment');
const logger= require('morgan');
const cookieParser= require('cookie-parser');
const app= express();
//to make helper available as locals to access them
require('./config/view-helpers')(app);

const port= 8000;
const expressLayouts= require('express-ejs-layouts');
const db = require('./config/mongoose');
//used for 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 passportFacebook= require('./config/passport-facebook-oauth2-strategy');
//here we use mongo store to store session cookie b'coz don't want to remove session cookie at every server restart ;)
const MongoStore= require('connect-mongo')(session);
const sassMiddleware= require('node-sass-middleware');
//for flash notification
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');

if(env.name=='development'){
    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'
    }));
}
//express functions
app.use(express.urlencoded({
    extended: false
  }));

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(logger(env.morgan.mode, env.morgan.options));

app.use(expressLayouts);


//extract scripts and styles from subpages to the layout
app.set('layout extractStyles',true);
app.set('layout extractScripts',true);

//set up 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:'sumitwa',
    //to 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);

//using flash services and put it after the sessions because it uses session cookies
app.use(flash());
app.use(customMware.setFlash);


//use express router
app.use('/',require("./routes/index.js"));
//setting up server
app.listen(port,function(err){
    if(err){
        console.log('something wrong in starting server !!!');
        return;
    }
     return console.log("server is up and running on port ",port);
});