server.js

const express = require('express');
const path = require('path');

const fileupload = require('express-fileupload');

require('dotenv').config({
  path: path.join(__dirname, 'config', 'config.env'),
});

const morgan = require('morgan');
const colors = require('colors');
const cookieParser = require('cookie-parser');
const mongoSanitize = require('express-mongo-sanitize');
const helmet = require('helmet');
const rateLimit = require('express-rate-limit');
const hpp = require('hpp');
const xss = require('xss-clean');

const cors = require('cors');
const router = require('./routes');
const DB = require('./config/db.config');

const middlewares = require('./middlewares');

// CONNECT TO THE DATABSE
new DB().getConnection();

const app = express();

const PORT = process.env.PORT || 5000;

const ROOT_PATH = `/api/v1`;

if (process.env.NODE_ENV === 'development') {
  app.use(morgan('dev'));
}
app.use(express.json());

// COOKIE PARSER
app.use(cookieParser());


// Data Sanitization against noSQL injection
app.use(mongoSanitize());

//http security with helmet
app.use(helmet());

//  Data Sanitization against XSS
app.use(xss());

// SERVING  STATIC  FILES
app.use(express.static(path.join(__dirname, 'public')));

//File uploading
app.use(fileupload());

// CREATE A RATE LIMITER
const limiter = rateLimit({
  max: 1000,
  windowMs: 60 * 60 * 1000,
  message: 'Too many request from this IP please try again in an hour',
});

app.use(ROOT_PATH, limiter);

//Prevent parameter pollution
app.use(hpp());

// Use CORS
app.use(cors());
app.options('*' , cors());




app.use(`${ROOT_PATH}/bootcamps`, router.bootCampRouter);
app.use(`${ROOT_PATH}/courses`, router.courseRouter);
app.use(`${ROOT_PATH}/auth`, router.authRouter);
app.use(`${ROOT_PATH}/users`, router.userRouter);
app.use(`${ROOT_PATH}/reviews`, router.reviewRouter);

app.use(middlewares.errorHandler);

const server = app.listen(PORT, () => {
  console.log(
    `server running in ${process.env.NODE_ENV} mode on port : ${PORT}`.yellow
      .bold
  );
});

process.on('unhandledRejection', (err) => {
  console.log(err.message.red);
  //Close server and exit
  server.close(() => {
    console.log(`Shutting down server`.white.bgRed.bold);
    process.exit(1);
  });
});