app.js

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

const AppError = require('./utils/appError');
const globalErrorHandler = require('./controllers/errorController');
const tourRouter = require('./routes/tourRoutes');
const userRouter = require('./routes/userRoutes');
const reviewRouter = require('./routes/reviewRoutes');
const viewRouter = require('./routes/viewRoutes');

const app = express();

app.set('view engine', 'pug');
app.set('views', path.join(__dirname, 'views'));

// 1) Global Middleware
//Serving static files
app.use(express.static(path.join(__dirname, 'public')));

// Set security HTTP headers
// app.use(helmet());
  // app.use(
  //   helmet({
  //     contentSecurityPolicy: {
  //       directives: {
  //         defaultSrc: ["'self'"],
  //         connectSrc: [
  //           "'self'",
  //           'http://127.0.0.1:3000',
  //           'ws://127.0.0.1:58540',
  //         ],
  //       },
  //     },
  //   }),
  // );

//Development logging
if (process.env.NODE_ENV === 'development') {
  app.use(morgan('dev'));
}

//Limit requests from same API
const limiter = rateLimit({
  max: 100,
  windowMs: 60 * 60 * 1000,
  message: 'Too many requests from this IP, please try again in an hour!',
});
app.use('/api', limiter);

//Body parser, reading data from body into req.body
app.use(express.json({ limit: '10kb' }));
app.use(express.urlencoded({ extended: true, limit: '10kb'}));
app.use(cookieParser());

//Data sanitization against NoSQL query injection
app.use(mongoSanitize());
//Data sanitization against XSS
app.use(xss());

//Prevent parameter pollution
app.use(
  hpp({
    whitelist: [
      'duration',
      'ratingsAverage',
      'ratingQuantity',
      'maxGroupSize',
      'difficulty',
      'price',
    ],
  })
);

//Test middleware
app.use((req, res, next) => {
  req.requestTime = new Date().toISOString();
  // res.clearCookie("jwt");
  // console.log(req.cookies);
  next();
});

// app.get('/api/v1/tours', getAllTours);
// app.get('/api/v1/tours/:id',getTour);
// app.post('/api/v1/tours', createTour);
// app.patch('/api/v1/tours/:id', updateTour);
// app.delete('/api/v1/tours/:id', deleteTour);

// 3) Routes

app.use('/', viewRouter);
app.use('/api/v1/tours', tourRouter);
app.use('/api/v1/users', userRouter);
app.use('/api/v1/reviews', reviewRouter);

app.all('*', (req, res, next) => {
  // const err = new Error(`Can't find ${req.originalUrl} on this server!`);
  // err.status = 'fail';
  // err.statusCode = 404;

  next(new AppError(`Can't find ${req.originalUrl} on this server!`, 404));
});

app.use(globalErrorHandler);

module.exports = app;