index.js

const express = require("express");
const app = express();
const mongoose = require("mongoose");
const dotenv = require("dotenv");
const userRouter = require("./routes/user");
const authRouter = require("./routes/auth");
const productRouter = require("./routes/product");
const cartRouter = require("./routes/cart");
const orderRouter = require("./routes/order");

dotenv.config();

mongoose
    .connect(process.env.MONGO_URL)
    .then(() => {
        console.log("connect to mongo");
    })
    .catch((err) => {
        console.log(err);
    });

app.use(express.json());

//how next() work

// app.get("/", function(httpRequest, httpResponse, next){
//     httpResponse.write("Hello");
//     next();
// });

// app.get("/", function(httpRequest, httpResponse, next){
//     httpResponse.write(" World !!!");
//     httpResponse.end();
// });

app.use("/api/user", userRouter);
app.use("/api/auth", authRouter);
app.use("/api/products", productRouter);
app.use("/api/carts", cartRouter);
app.use("/api/orders", orderRouter);

app.listen(process.env.PORT || 5000, () => {
    console.log("working!")
});