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());

// for build by these 2 line we can see project on localhost:5000
app.use("/", express.static(__dirname + "/build"));
app.get("/", (req, res) => res.sendFile(__dirname + "/build/index.html"));

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

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

app.get("/api/products", async (req, res) =>{
    const products = await Product.find({}); //Getiing all products
    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 deleteProduct = await Product.findByIdAndDelete(req.params.id);
    res.send(deleteProduct);
})

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("serve at http://localhost:5000"));