server.js

const express = require('express')
const bodyParser = require('body-parser')
const mongoose = require('mongoose')
const shortid = require('shortid')

const app = express()
app.use(bodyParser.json())

app.use("/", express.static(__dirname + "/build"))
app.get("/", (req, res) => res.sendFile(__dirname + "/build/index.html"))

mongoose.connect(
    process.env.MONGODB_URL || 
    "mongodb://localhost/react-store-db", {
    useNewUrlParser: true,
    useCreateIndex: true,
    useUnifiedTopology: true
})

const Product = mongoose.model(
    "products",
    new mongoose.Schema({
        _id: { type: String, default: shortid.generate },
        title: String,
        image: String,
        description: String,
        price: Number,
        avaliableSizes: [String],
    })
)

app.get("/api/products", async(req, res)=>{
    const products = await Product.find({})
    res.send(products)
})

app.post("/api/products", async(req, res) => {
    const newProduct = new Product(req.body)
    const savedProduct = await newProduct.save()
    res.send(savedProduct)
})

app.delete("/api/products/:id", async(req, res) => {
    const deletedProduct = await Product.findByIdAndDelete(req.params.id)
    res.send(deletedProduct)
})

const Order = mongoose.model("order", new mongoose.Schema(
    {
        _id: {
            type: String,
            default: shortid.generate,
        },
        email: String,
        name: String,
        address: String,
        total: Number,
        cartItems: [
            {
                _id: String,
                title: String,
                price: Number,
                count: Number,
            },
        ],
    },
    {
        timestamps: true,
    }
))

app.post("/api/orders", async (req, res) => {
    if (
      !req.body.name ||
      !req.body.email ||
      !req.body.address ||
      !req.body.total ||
      !req.body.cartItems
    ) {
      return res.send({ message: "Data is required." })
    }
    const order = await Order(req.body).save()
    res.send(order)
  })

app.get("/api/orders", async(req, res) => {
    const orders = await Order.find({})
    res.send(orders)
})

app.delete("/api/orders/:id", async(req, res) => {
    const order = await Order.findByIdAndDelete(req.params.id)
    res.send(order)
})

const port = process.env.PORT || 5000
app.listen(port, () => console.log("server at http://localhost:5000"))