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server.js
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server.js
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require('dotenv').config(); // accessing .env file in root directory
const express = require('express'); // including express module
const app = express(); // storing express object to access its function
const path = require('path');
const ejs = require('ejs'); // including template engine
const expressLayout = require('express-ejs-layouts');
const PORT = process.env.PORT || 3300; // setting port to 3000 using PORT variable
const mongoose = require('mongoose');
const session = require('express-session');
const flash = require('express-flash'); // middleware
const MongoDbStore = require('connect-mongo')(session) // passing session variables to mongodb
const passport = require('passport');
const Emitter = require('events');
// mongodb+srv://Sanjeev:sanjeev@7@godam.1uwvm.mongodb.net/sessions?retryWrites=true&w=majority
// Database Connection
mongoose.connect(process.env.MONGO_URL, { useNewUrlParser: true, useCreateIndex:true, useUnifiedTopology:true, useFindAndModify:true}
);
const connection = mongoose.connection;
connection.once('open',() => {
console.log('DB Connected...');
}).catch(err => {
console.log('Connection falied...')
});
// Session Store
let mongoStore = new MongoDbStore({
mongooseConnection: connection,
collection: 'sessions' // creating sessions table in mongoDB to store session_id and TTL
})
// Event emitter for enabling use of sockets in statusController.js to provide real time comm
const eventEmitter = new Emitter()
app.set('eventEmitter',eventEmitter) // binding eventEmitter with app to provide its global access all over the app
// Session Config
app.use(session({
secret: process.env.COOKIE_SECRET, // for cookies encryption - cookies stored during session
resave: false,
store: mongoStore, // storing session_id in mongoStore
saveUninitialized: false,
cookie: {maxAge: 1000 * 60 * 60 * 24} //cookie timeline 24 hrs
}))
// Passport config
const passportInit = require('./app/config/passport')
passportInit(passport)
app.use(passport.initialize())
app.use(passport.session())
// Using express-flash middleware for sessions
app.use(flash())
app.use(express.json()) // for json type data
app.use(express.urlencoded({extended: false})) // for form-data
// Global middleware for allowing global access of sesssion variables in every page
app.use((req, res, next) => {
res.locals.session = req.session
res.locals.user = req.user // for allowing global access of user
next()
})
// Assets
app.use(express.static('public'))
// setting template engine
app.use(expressLayout);
app.set('views', path.join(__dirname,'/resources/views'));
app.set('view engine', 'ejs');
require('./routes/web')(app) // Setting routes in web.js
app.use((req,res) => {
res.status(404).render('errors/404')
})
const server = app.listen(PORT, () => {
console.log(`Listening on port ${PORT}`);
})
// Socket connection
const io = require('socket.io')(server) // connecting socket to server
io.on('connection', (socket) => {
// Join room with orderID
console.log(socket.id)
socket.on('join', (orderId) => { // receiving 'join' event sent fron app.js
socket.join(orderId) // creating private room of orderId
})
})
eventEmitter.on('orderUpdated', (data) => {
io.to(`order_${data.id}`).emit('orderUpdated', data) // sending to client i.e. app.js
})
eventEmitter.on('orderPlaced', (data) => {
io.to('adminRoom').emit('orderPlaced', data)
})