index.js

const express = require('express');
const mongoose = require('mongoose');
const Connection = require('./connection.js')
const productSchema = require('./model.js');
const dotenv = require('dotenv');

const app = express();

app.use(express.json())
dotenv.config();

app.get('/', (req, res) => {
    res.send("hello from Node api");
});

//CREATE API
app.post("/api/products", async (req, res) => {
    try {
        const product = await Product.create(req.body);
        res.status(200).json(product);
    } catch (error) {
        res.status(500).json({message: error.message});
    }
})

//READ API 
app.get("/api/products", async (req, res) => {
    try {
        const products = await Product.find({});
        res.status(200).json(products);
    } catch (error) {
        res.status(500).json({message: error.message});
    }
});

//UPDATE API
app.put("/api/product/:id", async (req, res) => {
    try {
        const { id } = req.params;

        const product = await Product.findByIdAndUpdate(id, req.body);
        if (!product) {
            return res.status(404).json({message: "Product not found"});
        }

        const updatedProduct = await Product.findById(id);
        res.status(200).json(updatedProduct);
    } catch (error) {
        res.status(500).json({message: error.message});
    }
});

//API FOR DELETE 
app.delete("/api/product/:id", async (req, res) => {
    try {
        const { id } = req.params;

        const product = await Product.findByIdAndDelete(id);
        if (!product) {
            return res.status(404).json({message: "Product not found"});
        }

        res.status(200).json({message: "product successfully deleted"});
    } catch (error) {
        res.status(500).json({message: error.message});
    }
});

const username = process.env.DB_USERNAME;
const password = process.env.DB_PASSWORD;

Connection(username, password);

const Product = mongoose.model("Product", productSchema)

app.listen(3000, () => {
    console.log('server is running on port 3000');
});