app.js

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 orderRoutes = require("./api/routes/orders");
const userRoutes = require("./api/routes/user");
mongoose.connect(
  "mongodb://localhost/node-rest-api",
  { useNewUrlParser: true }
);
app.use(morgan("dev"));
app.use(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,DELETE,POST,GET,PATCH");
    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("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;