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 hpp = require('hpp');
const cookieParser = require('cookie-parser');
const cors = require('cors');
const compression = require('compression');

// Creating an instance of express app
const tourRouter = require('./routes/tourRoutes');
const userRouter = require('./routes/userRoutes');
const reviewRouter = require('./routes/reviewRoutes');
const viewRouter = require('./routes/viewRoutes');
const bookingRouter = require('./routes/bookingRoutes');
const AppError = require('./utils/appError');
const globalErrorHandler = require('./controllers/errorController');

const app = express();

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

//1) Gobal MIDDLEWARES
// Set security HTTP header
app.use(
  helmet({ contentSecurityPolicy: false, crossOriginEmbedderPolicy: false })
);

app.use(
  cors({
    origin: 'http://localhost:3000', // Replace with the origin of your frontend application
  })
);

// Reaing data from a file and storing it in a variable
app.use(express.static(path.join(__dirname, 'public')));

//Log HTTP requests
if (process.env.NODE_ENV === 'development') {
  app.use(morgan('dev'));
}

// Limits request from same IP
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);

// Parse incoming JSON data
app.use(express.json({ limit: '10kb' }));
app.use(cookieParser());

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

// preventing Parameter Pollution
app.use(
  hpp({
    whitelist: [
      'duration',
      'ratingsQuantity',
      'ratingsAverage',
      'maxGroupSize',
      'difficulty',
      'price',
    ],
  })
);

app.use(compression());

app.use((req, res, next) => {
  req.requestTime = new Date().toISOString();
  // console.log('hello from zhe');
  next();
});

//ROUNTER HANDLERS
// Handling POST requests to create a new tour

//Routes
app.use('/', viewRouter);

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

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;