REST API Development

const express = require("express");
const router = express.Router();

let users = [
  { id: 1, name: "রহিম", email: "rahim@example.com" },
  { id: 2, name: "করিম", email: "karim@example.com" },
];

// GET /api/users
router.get("/", (req, res) => {
  res.json(users);
});

// GET /api/users/:id
router.get("/:id", (req, res) => {
  const user = users.find(u => u.id === parseInt(req.params.id));
  if (!user) return res.status(404).json({ error: "User পাওয়া যায়নি" });
  res.json(user);
});

// POST /api/users
router.post("/", (req, res) => {
  const { name, email } = req.body;
  if (!name || !email) {
    return res.status(400).json({ error: "Name ও email দরকার" });
  }
  const newUser = { id: Date.now(), name, email };
  users.push(newUser);
  res.status(201).json(newUser);
});

// PUT /api/users/:id
router.put("/:id", (req, res) => {
  const user = users.find(u => u.id === parseInt(req.params.id));
  if (!user) return res.status(404).json({ error: "User পাওয়া যায়নি" });
  Object.assign(user, req.body);
  res.json(user);
});

// DELETE /api/users/:id
router.delete("/:id", (req, res) => {
  users = users.filter(u => u.id !== parseInt(req.params.id));
  res.json({ message: "User মুছে ফেলা হয়েছে" });
});

module.exports = router;

// simple validation middleware
const validateUser = (req, res, next) => {
  const { name, email } = req.body;
  if (!name || name.length < 2) {
    return res.status(400).json({
      error: "Name কমপক্ষে 2 characters হতে হবে"
    });
  }
  if (!email || !email.includes("@")) {
    return res.status(400).json({
      error: "Valid email দিন"
    });
  }
  next();
};

router.post("/", validateUser, (req, res) => {
  // validated data
  const user = { id: Date.now(), ...req.body };
  users.push(user);
  res.status(201).json(user);
});