backend/app.js - main - eb/cooper

const express = require('express');
const bodyParser = require('body-parser');
const fs = require('fs');
const path = require('path');
const mongoose = require('mongoose');
const productsRoutes = require('./routes/products-routes');
const categoriesRoutes = require('./routes/categories-routes');
const usersRoutes = require('./routes/users-routes');
const HttpError = require("./models/http-error");

require('dotenv').config();

const app = express();

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

app.use('/uploads/images', express.static(path.join('uploads', 'images')));

app.use((req, res, next) => {
	res.setHeader('Access-Control-Allow-Origin', '*');
	res.setHeader('Access-Control-Allow-Headers', 'Origin, X-Requested-With, Content-Type, Accept, Authorization');
	res.setHeader('Access-Control-Allow-Methods', 'GET, POST, PATCH, DELETE');
	next();
});

app.use('/api/v1/categories', categoriesRoutes);
app.use('/api/v1/products', productsRoutes);
app.use('/api/v1/users', usersRoutes);

app.use((req, res, next) => {
	throw new HttpError('Could not find this route.', 404);
});

app.use((error, req, res, next) => {
	if (req.file) {
		fs.unlink(req.file.path, err => {
			console.log(err);
		});
	}
	if (res.headerSent) {
		return next(error);
	}
	res.status(error.code || 500);
	res.json({message: error.message || 'An unknown error occurred!'});
});

// Connecting to database
mongoose
	.connect(
		process.env.MONGODB_URI
	).then(() => {
	console.log('Connected to database!');
}).catch(() => {
	console.log('Connection failed!');
});

app.listen(process.env.PORT, () => {
	console.log(`Server is running on port ${process.env.PORT}`);
});