04. authentication middleware

// middleware/auth.js
const jwt = require('jsonwebtoken');
const { User } = require('../models');

const verifyToken = async (req, res, next) => {
  const token = req.headers['x-access-token'];

  if (!token) {
    return res.status(403).send({ message: "No token provided!" });
  }

  try {
    const decoded = jwt.verify(token, process.env.JWT_SECRET);
    const user = await User.findByPk(decoded.id);
    
    if (!user) {
      return res.status(401).send({ message: "Unauthorized!" });
    }

    req.user = user;
    next();
  } catch (err) {
    return res.status(401).send({ message: "Unauthorized!" });
  }
};

module.exports = verifyToken;