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 path = require('path');

const AppError = require('./utils/appError');
const globalErrorHandler = require('./controllers/errorController');
const postRouter = require('./routes/postRoutes');
const userRouter = require('./routes/userRoutes');
const commentRouter = require('./routes/commentRoutes');
const viewRouter = require('./routes/viewRoutes');
const cookieParser = require('cookie-parser');
const cors = require('cors');

const app = express();

app.set('trust proxy', 1);

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

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

app.use(helmet());

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

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);

app.use(
  express.json({
    limit: '10kb'
  })
);

app.use(cookieParser());

app.use(mongoSanitize());

app.use(xss());

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

app.use(express.static(path.join(__dirname, 'public')));

app.use('/', viewRouter);
app.use('/api/v1/posts', postRouter);
app.use('/api/v1/users', userRouter);
app.use('/api/v1/comments', commentRouter);

app.all('*', (req, res, next) => {
  next(new AppError(`Can't find ${req.originalUrl} on this server`, 400));
});

app.use(globalErrorHandler);

module.exports = app;