index.js

const express=require('express');
const env=require('./config/environment'); 
const logger=require('morgan');
const cookieParser=require('cookie-parser');
const app=express();
require('./config/view-helpers')(app);
const port=8000;
//const cors = require('cors');//for resolving has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource


const expressLayouts=require('express-ejs-layouts');
const db =require('./config/mongoose');
app.use(expressLayouts);

// 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 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');

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'
    }));
}

app.use(express.static(env.asset_path));
app.use(express.urlencoded());
app.use(cookieParser());



//app.use(cors());

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

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

//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 in running the server: ${err}`);
    }
    console.log(`Server is running on port: ${port}`);
   
});