app.js

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 AppError = require('./utils/appError');
const globalErrorHandler = require('./controller/errorController');
const userRouter = require('./routes/userRoute');

// SET UP APP
const app = express();

// USE MIDDLEWARE
// Set security HTTP headers
app.use(helmet());

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

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

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

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

// data sanitization against xss
app.use(xss());

// Prevent parameter pollution
app.use(
  hpp({
    whitelist: [],
  })
);

// Serving static files
app.use(express.static(`${__dirname}/public`));

app.use('/api/v1/users', userRouter);
app.use('/', (req, res, next) => {
  res.status(200).json({
    status: 'success',
    message: 'Welcome to Cope Notes Mental Health Support API service!',
  });
});

// HANDLE WRONG ENDPOINTS
app.all('*', (req, res, next) => {
  next(new AppError(`Can't find ${req.originalUrl} on this server!`, 404));
});

app.use(globalErrorHandler);

module.exports = app;