app.js

var createError = require('http-errors');
var express = require('express');
var path = require('path');
var cookieParser = require('cookie-parser');
var logger = require('morgan');
var passport = require('passport');
var methodoverride=require('method-override');
var localstatergy = require('passport-local');
var indexRouter = require('./routes/index');
var user = require('./models/user');

var app = express();

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'ejs');

app.use(require('express-session')({
    secret:'Mohit Namdev',
    resave:false,
    saveUninitialized:false
}));
app.use(passport.initialize());
app.use(passport.session());
passport.use(new localstatergy(user.authenticate()));
passport.serializeUser(user.serializeUser());
passport.deserializeUser(user.deserializeUser());

app.use(methodoverride('_method'));
app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: true }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));

/*
Following is done so that the information can be requested from any ejs page rather than declaring it exclusivly
 */

app.use(function (req,res,next) {
    // To Identify if someone is logged in or not
    res.locals.currentuser = req.user;
    next();
});


app.use('/', indexRouter);

// catch 404 and forward to error handler
app.use(function(req, res, next) {
  next(createError(404));
});

// error handler
app.use(function(err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render('error');
});

app.listen(3000,function (error) {
   if(error){
     console.log(error);
   }
   else{
     console.log("Started");
   }
});

module.exports = app;