একটি REST API তৈরি করা

const express = require('express')
const app = express()
app.use(express.json())

let products = [
  { id: 1, name: 'Laptop Stand', price: 25 },
  { id: 2, name: 'Wireless Mouse', price: 15 },
]

// সব READ করা
app.get('/products', (req, res) => {
  res.json(products)
})

// একটি READ করা
app.get('/products/:id', (req, res) => {
  const product = products.find(p => p.id === Number(req.params.id))
  if (!product) return res.status(404).json({ error: 'Product not found' })
  res.json(product)
})

// CREATE
app.post('/products', (req, res) => {
  const newProduct = { id: products.length + 1, ...req.body }
  products.push(newProduct)
  res.status(201).json(newProduct)
})

// UPDATE
app.put('/products/:id', (req, res) => {
  const product = products.find(p => p.id === Number(req.params.id))
  if (!product) return res.status(404).json({ error: 'Product not found' })
  Object.assign(product, req.body)
  res.json(product)
})

// DELETE
app.delete('/products/:id', (req, res) => {
  products = products.filter(p => p.id !== Number(req.params.id))
  res.status(204).end()
})

app.listen(3000)