index.js

/*******************************************************************************
 * Feel free to remove this comment block and all other comments after pulling.
 * They're for information purposes only.
 *
 * This layout is provided to you for an easy and quick setup to either pull
 * or use to correct yours after working at least 1 hour on Team Activity 02.
 * Throughout the course, we'll be using Express.js for our view engines.
 * However, feel free to use pug or handlebars ('with extension hbs'). You will
 * need to make sure you install them beforehand according to the reading from
 * Udemy course.
 * IMPORTANT: Make sure to run "npm install" in your root before "npm start"
 *******************************************************************************/


/* Packages */
const fs = require('fs');
const express = require('express');
const session = require('express-session');
const MongoDBStore = require('connect-mongodb-session')(session);
const bodyParser = require('body-parser');
const cors = require('cors');
const mongoose = require('mongoose');
const path = require('path');
const csrf = require("csurf");
const flash = require("connect-flash");


/* variables */
//main app variable
const app = express();

//cors options
const corsOptions = {
  origin: "https//cse341-ssharp.herokuapp.com/",
  optionsSuccessStatus: 200
}
const options = {
  useUnifiedTopology: true,
  useNewURLParser: true,
  family: 4
};

//db setup

let mdb_url = "";
if(fs.existsSync("./cred.json")) {
  let credsIn = fs.readFileSync("./cred.json")
  let creds = JSON.parse(credsIn);
  mdb_url = creds.url;
}

const PORT = process.env.PORT || 5000; // So we can run on heroku || (OR) localhost:5000
const MONGODB_URL = process.env.MONGODB_URL || mdb_url;

const store = new MongoDBStore({
  uri: MONGODB_URL,
  collection: "sessions"
});

//csrf variable
const csrfProtection = csrf();


/* Router */
const eCommerceRouter = require('./routes/eCommerceRoutes');


/* Initialize Model */
const eCommModel = require('./Model/products');
eCommModel.fetchProducts();


/* Initialize app */
app
  //core setup
  .use(cors(corsOptions))
  .set('views', path.join(__dirname, 'views')) // set up the views folder
  .set('view engine', 'ejs') // set up EJS
  .use(bodyParser({ extended: false })) // For parsing the body of a POST
  // express
  .use(express.static(path.join(__dirname, 'public'))) // define our public folder for images/stylesheets/public js
  .use(session({secret: 'secretlysecretpassthing', resave: false, saveUninitialized: false, store:store})) // sessions
  // additional middleware
  .use(csrfProtection) // add our csrf protection
  .use(flash()) // flash for sending quick feedback
  //these are variables that the res will pretty much always need
  .use((req, res, next) => {
    res.locals.path = req.url;
    res.locals.loggedIn = req.session.loggedIn;
    if(req.session.permissions != null)
      res.locals.permissions = req.session.permissions;
    else
      res.locals.permissions = [];
    res.locals.csrfToken = req.csrfToken();
    next();
  })
  // router
  .use('/', eCommerceRouter)
  // default indices
  .get('/', (req, res, next) => { // This is the primary index, always handled last.
    res.redirect("/shop");
  })
  .use((req, res, next) => { // 404 page
    res.locals.loggedIn = req.session.loggedIn;
    if(req.session.permissions != null)
      res.locals.permissions = req.session.permissions;
    else
      res.locals.permissions = [];
    res.locals.csrfToken = req.csrfToken();

    res.render('pages/404', { path: req.url });
  })
  .use((err, req, res, next) => { // 500 page
    res.locals.loggedIn = req.session.loggedIn;
    if(req.session.permissions != null)
      res.locals.permissions = req.session.permissions;
    else
      res.locals.permissions = [];
    res.locals.csrfToken = req.csrfToken();

    console.log(err.stack);
    
    res.status(500);
    res.render('pages/500', {
      path: "/500"
    });
  });


/* Connect to Database and Start Server */
mongoose
.connect(
  MONGODB_URL, options
)
.then(result => {
    app.listen(PORT, () => console.log(`Listening on ${PORT}`));
})
.catch(err => {
  console.log(err);
});