app.js

const path = require('path');
const express = require('express');
const bodyParser = require('body-parser');
const multer = require('multer');
const session = require('express-session');
const csrf = require('csurf');
const flash = require('connect-flash');
const MongoDBStore = require('connect-mongodb-session')(session);
const errorController = require('./controllers/error');
const mongoConnect = require('./util/database').mongoConnect;
const User = require('./models/user');
const dotenv = require('dotenv');
dotenv.config();

const URI = process.env.MONGODB_URI;

const app = express();
const store = new MongoDBStore({
    uri: URI,
    collection: 'sessions'
});
const csrfProtection = csrf();

const fileStorage = multer.diskStorage({
    destination: (req, file, cb) => {
        cb(null, 'images');
    },
    filename: (req, file, cb) =>{
        cb(null, file.filename+ '-' + file.originalname);
    }
});

const fileFilter = (req,file,cb) => {
    if(file.mimetype ==='image/png' || file.mimetype === 'image/jpg'|| file.mimetype === 'image/jpeg'){
           cb(null,true);
       }else{
           cb(null, false);
       }
}

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

const adminRoutes = require('./routes/admin');
const shopRoutes = require('./routes/shop');
const authRoutes = require('./routes/auth');

app.use(bodyParser.urlencoded({ extended: false }));
app.use(multer({storage: fileStorage, fileFilter: fileFilter}).single('image'));
app.use(express.static(path.join(__dirname, 'public')));
app.use('/images', express.static(path.join(__dirname, 'images')));
app.use(session({
    secret: 'myseccret',
    resave: false,
    saveUninitialized: false,
    store: store
    })
);
app.use(csrfProtection);
app.use(flash());

app.use((req, res, next) => {
    res.locals.isAuthenticated = req.session.isLoggedIn;
    res.locals.csrfToken = req.csrfToken();
    next();
});
  
app.use((req, res, next)=>{
    if(!req.session.user){
        return next();
    }
    User.findById(req.session.user._id)
    .then(user => {
        req.user = new User(user.email,user.password,user.cart,user._id);
        next();
    })
    .catch(err =>{
        next(new Error(err));
    });
});

app.use('/admin', adminRoutes);
app.use(shopRoutes);
app.use(authRoutes);

app.use(errorController.get404);

app.use((error, req, res, next) => {
    res.status(500).render('500', {
      pageTitle: 'Error!',
      path: '/500',
      isAuthenticated: req.session.isLoggedIn
    });
  });

mongoConnect(() => {
    app.listen(3000);
})