app.js

/* global require */
const express = require("express");
const app = express();
const morgan = require("morgan");
const bodyParser = require("body-parser");
const mongoose = require("mongoose");

const productRoutes = require("./api/routes/products");
const userRoutes = require("./api/routes/user");

mongoose.connect("mongodb://Micro:" + process.env.MONGO_ATLAS_PW + "@cluster0-shard-00-00-twxn9.mongodb.net:27017,cluster0-shard-00-01-twxn9.mongodb.net:27017,cluster0-shard-00-02-twxn9.mongodb.net:27017/test?ssl=true&replicaSet=Cluster0-shard-0&authSource=admin&retryWrites=true&w=majority");
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-Header", "*");
  if (req.method === "OPTIONS") {
    res.header("Access-Control-Allow-Methods", "PUT, POST, PATCH, GET, DELETE");
    return res.status(200).json({});
  }
  next();
});

app.use("/products", productRoutes);
app.use("/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;