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app.js
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app.js
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const express = require('express');
const app = express();
const mongoose = require('mongoose')
const methodOverride = require('method-override')
const ejsMate = require('ejs-mate')
const path = require('path')
const Product = require('./schemas/product')
const Shopper = require('./schemas/shopper')
const Manager = require('./schemas/manager')
const passport = require('passport')
const session = require('express-session')
const LocalStrategy = require('passport-local')
const flash = require('connect-flash')
const bodyParser = require('body-parser')
const employee = require('./routes/employee')
const shopper = require('./routes/shopper')
const processing = require('./utils/deliveryprocessing')
//Constantly checks if any delivery should be processed
setInterval(async function process() {
return new Promise(async (resolve, reject) => {
await processing.processDelivery().then(async () => {
resolve()
})
})
}, 10000)
const MongoDBStore = require("connect-mongo");
//Connecting mongoose to MongoDB
const dbUrl = 'mongodb://localhost:27017/supermarket'
mongoose.connect(dbUrl, {
useNewUrlParser: true,
useUnifiedTopology: true,
})
const db = mongoose.connection
db.on('error', console.error.bind(console, 'connection error:'))
db.once('open', () => {
console.log('Database connected')
});
//EJS allows to write JavaScript in HTML files with .ejs extension
app.engine('ejs', ejsMate)
app.set('view engine', 'ejs')
//No need to specify 'views' directory when rendering
app.set('views', path.join(__dirname, 'views'))
app.use(express.urlencoded({ extended: true }))
app.use(bodyParser.json())
app.use(express.json())
//Allows to sent POST requests from HTML forms
app.use(methodOverride('_method'))
//Allows to serve static CSS and JS files to the client
app.use(express.static(path.join(__dirname, 'public')))
//Allows to flash useful messages to the user
app.use(flash())
// const secret = process.env.SECRET || 'thisshouldbeabettersecret!';
// const store = new MongoDBStore({
// url: dbUrl,
// secret,
// touchAfter: 24 * 60 * 60
// });
// store.on("error", function (e) {
// console.log("SESSION STORE ERROR", e)
// })
//Configurations necessary for sessions (once the user logs in, they stay logged in)
const shopperSessionConfig = {
name: 'shopper',
secret: 'secret1',
resave: false,
saveUninitialized: true,
store: MongoDBStore.create({
mongoUrl: dbUrl
}),
cookie: {
httpOnly: true,
// secure: true,
expires: Date.now() + 1000 * 60 * 60 * 24 * 7,
maxAge: 1000 * 60 * 60 * 24 * 7
}
}
const employeeSessionConfig = {
name: 'employee',
secret: 'secret2',
resave: false,
saveUninitialized: true,
store: MongoDBStore.create({
mongoUrl: dbUrl
}),
cookie: {
httpOnly: true,
// secure: true,
expires: Date.now() + 1000 * 60 * 60 * 24 * 7,
maxAge: 1000 * 60 * 60 * 24 * 7
}
}
const sessionConfig = {
name: 'session',
secret: 'secret2',
resave: false,
saveUninitialized: true,
store: MongoDBStore.create({
mongoUrl: dbUrl
}),
cookie: {
httpOnly: true,
// secure: true,
expires: Date.now() + 1000 * 60 * 60 * 24 * 7,
maxAge: 1000 * 60 * 60 * 24 * 7
}
}
app.use('/shopper', session(shopperSessionConfig));
app.use('/employee', session(employeeSessionConfig));
app.use('/', session(sessionConfig))
//Provides authentication functionality
app.use(passport.initialize());
passport.serializeUser(function (user, done) {
let key = {
id: user._id,
role: user.role
}
done(null, key);
});
passport.deserializeUser(function (key, done) {
if (key.role === "shopper") {
Shopper.findById(key.id, function (err, user) {
done(err, user);
});
} else {
Manager.findById(key.id, function (err, user) {
done(err, user);
});
}
});
app.use(passport.session())
passport.use('shopper', new LocalStrategy(Shopper.authenticate()))
passport.use('employee', new LocalStrategy(Manager.authenticate()))
app.use((req, res, next) => {
res.locals.currentUser = req.user
next()
})
app.use((req, res, next) => {
res.locals.success = req.flash('success')
res.locals.error = req.flash('error')
next()
})
//Renders the home page
app.get('/home', (req, res) => {
res.render('home')
})
//Shows all the products in the store
app.get('/products', async (req, res) => {
const products = await Product.find({})
res.render('products', { products })
})
//Tells the app to use the routes from the 'routes' folder
//These are the routes that start with /employee or /shopper
app.use('/employee', employee)
app.use('/shopper', shopper)
//Serving on port 3000
app.listen(3000, () => {
console.log(`Serving on port 3000!`);
});