app.js

const express = require('express');
const app = express();
const morgan = require('morgan');
const bodyParser = require('body-parser')
const mongoose = require('mongoose');



const articleRoutes = require('./api/routes/articles');
const userRoutes = require('./api/routes/auth');

mongoose.connect('mongodb+srv://MM-task:' + process.env.MONGO_ATLAS_PW + '@mm-task.yslmt.mongodb.net/?retryWrites=true&w=majority',{
    useNewUrlParser: true 
})

mongoose.Promise = global.Promise;


app.use(morgan('dev'));
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, DELETE, GET');
        return res.status(200).json({});
    }
    next();
})

app.use("/admin",userRoutes);

app.use("/articles",articleRoutes);

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;