app.js

const express = require('express')
const app = express()
const productRoutes = require('./api/routes/products')
const orderRoutes = require('./api/routes/orders')
const userRoutes = require('./api/routes/users')
const morgan = require('morgan')
const bodyParser = require('body-parser')
const mongoose = require('mongoose')
/*Hope I change the password during production*/
mongoose.connect('mongodb://yashvanzara:adminadmin@ds223019.mlab.com:23019/textdb',
    {
        useMongoClient:true
    })
mongoose.Promise = global.Promise
app.use(morgan('dev'));
app.use(bodyParser.urlencoded({
    extended: false
}));
app.use('/uploads', express.static('uploads'))
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, DELETE, GET')
        return res.status(200).json({})
    }
    next()
});

app.use('/products',productRoutes);
app.use('/orders',orderRoutes);
app.use('/user',userRoutes);

app.use((req, res, next) => {
   const error = new Error('404 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