index.js

const express = require('express');
const app = express();
const morgan = require('morgan');
const bodyParser = require('body-parser');
const mongoose = require('mongoose');
const YAML = require('yamljs');
const swaggerDocument = YAML.load('./swagger.yaml');

var swaggerUi = require('swagger-ui-express');
// swaggerDocument = require('./swagger.json');

const productRoutes = require('./api/routes/products');
const orderRoutes = require('./api/routes/orders');
const userRoutes = require('./api/routes/user');

mongoose.connect(
  'mongodb+srv://admin:' +
    process.env.MONGO_ATLAS_PW +
    '@node-rest-vgeul.mongodb.net/test?retryWrites=true&w=majority',
  { useNewUrlParser: true, useUnifiedTopology: true }
);
mongoose.Promise = global.Promise;
app.use(morgan('dev'));
app.use('/uploads', express.static('uploads'));

app.use(bodyParser.urlencoded({ extended: false }));
app.use(bodyParser.json());

app.use((req, res, next) => {
  res.header('Access-Control-Allow-Origin', '*');
  res.header(
    'Access-Control-Allow-Headers',
    'Origin, X-Requested-With, Content-Type, Accept, Authorization'
  );
  if (req.method === 'OPTIONS') {
    res.header(
      'Access-Control-Allow-Methods',
      'PUT',
      'POST',
      'PATCH',
      'GET',
      'DELETE'
    );
    return res.status(200).json({});
  }
  next();
});

app.use('/api-docs', swaggerUi.serve, swaggerUi.setup(swaggerDocument));

//Routes which handle requests
app.use('/api/v1/products', productRoutes);
app.use('/api/v1/orders', orderRoutes);
app.use('/api/v1/user', userRoutes);

app.use((req, res, next) => {
  const error = new Error('Not Found');
  error.status = 404;
  next(error);
});

app.use((error, req, res, next) => {
  res.status(error.status || 500);
  res.json({
    error: {
      message: error.message,
    },
  });
});
module.exports = app;