Notes

const express = require("express");
const cors = require("cors");

const app = express();
const port = 4444;

let products = [
{
product_name: "Chips",
prodID: "1",
manu_date: "2021-01-01",
exp_date: "2022-03-01",
price: "$5",
},

{
product_name: "milk",
prodID: "2",
manu_date: "2023-02-01",
exp_date: "2023-02-12",
price: "$2",
},
{
product_name: "cool drink",
prodID: "3",
manu_date: "2022-07-01",
exp_date: "2023-07-01",
price: "$20",
},

{
product_name: "Bread",
prodID: "4",
manu_date: "2023-05-11",
exp_date: "2023-05-01",
price: "$3",
},
{
product_name: "Honey",
prodID: "5",
manu_date: "2022-05-01",
exp_date: "2023-05-01",
price: "$10",
},
{
product_name: "Coffee Powder",
prodID: "6",
manu_date: "2022-05-12",
exp_date: "2023-07-12",
price: "$10",
},
{
product_name: "KIT-KAT",
prodID: "7",
manu_date: "2022-12-20",
exp_date: "2023-05-09",
price: "$3",
},
{
product_name: "Cosmetics",
prodID: "8",
manu_date: "2022-01-20",
exp_date: "2023-02-01",
price: "$50",
},
{
product_name: "ICE-CREAM",
prodID: "9",
manu_date: "2023-01-20",
exp_date: "2023-03-20",
price: "$15",
},
{
product_name: "Milk shake",
prodID: "10",
manu_date: "2023-01-30",
exp_date: "2023-05-30",
price: "$20",
},
{
product_name: "Ghee",
prodID: "11",
manu_date: "2022-02-10",
exp_date: "2025-03-10",
price: "$25",
},
{
product_name: "Biscuit",
prodID: "12",
manu_date: "2023-01-20",
exp_date: "2024-03-20",
price: "$10",
},
// {
// product_name: "Tea Powder",
// prodID: "13",
// exp_date: "2022-05-12",
// manu_date: "2023-07-12",
// price: "$10",
// },
// {
// product_name: "Cosmetics",
// prodID: "14",
// exp_date: "2022-05-12",
// manu_date: "2025-05-02",
// price: "$70",
// },
// {
// product_name: "Spray",
// prodID: "15",
// exp_date: "2022-07-12",
// manu_date: "2025-07-12",
// price: "$50",
// },
];


var productDetails = function (req , res,next) {
res.header ('Access-Control-Allow-Origin','*')
res.header ('Access-Control-Allow-Method','GET,PUT,POST,DELETE')
res.header ('Access-Control-Allow-Header','Context-Type')
next()
}

app.use(cors())

app.use(productDetails)

app.use(express.urlencoded({extended:false}));
app.use(express.json());

app.get('/product',(req,res) => {
res.json(products);
})

app.listen(port, ()=> console.log(`products api listening at port ${port}!`));



app.get('/product/:price' , (req,res) => {
const price = req.params.price;

for (let product of products) {

if (product.price === price) {
res.json(product);
return;
}
}
res.status(404).send('product not found')
})

//post

app.post('/product',(req,res) => {
const product = req.body
products.push(product)
res.send('product is added')
})



//put

app.put('/product/:price' , (req,res) => {
const price = req.params.price;
const newProduct = req.body

for (let i=0; i < products.length; i++) {
let product = products[i]

if (product.price === price) {
products[i] = newProduct;
}
}
res.send('product is edited')
})



app.delete('/product/:price' , (req,res) => {
const price = req.params.price;

products = products.filter(i => {
if(i.price !== price) {
return true;
}
return false;
})
res.send('product is deleted')
})