public class Login extends Command {

    @Override
    String execute(HttpServletRequest request, HttpServletResponse response) throws LoginSampleException {



        PasswordEncryptionService passwordService = new PasswordEncryptionService();


        String email = request.getParameter("email");
        String password = request.getParameter("password");


       // her henter vi salten fra brugeren, til at validere brugeren.
    try {
            byte[] salt = LogicFacade.getSalt(email, password);



        byte[] attemptedPassword = passwordService.getEncryptedPassword(password, salt);

        if(passwordService.authenticate(password, attemptedPassword, salt)){

            User user = null;
            user = LogicFacade.login(email, password);

            HttpSession session = request.getSession();
            session.setAttribute("user", user);
            session.setAttribute("role", user.getRole());

            return user.getRole() + "page";

        }else{


       // Vi logger salten og det hashede password til loggeren

        }

}       catch (SQLException | NoSuchAlgorithmException | InvalidKeySpecException ex) {
            Logger.getLogger(Login.class.getName()).log(Level.SEVERE, null, ex);

            String errorMessage ="We have an internal problem, but we are working as hard as possible, to solve it.";
             Logger.getLogger(Login.class.getName()).log(Level.SEVERE, null, ex);
            request.setAttribute("errorMessage", errorMessage );
            try {
                request.getRequestDispatcher("/index.jsp").forward(request, response);
            } catch (ServletException | IOException ex1) {
                Logger.getLogger(Login.class.getName()).log(Level.SEVERE, null, ex1);
            }
            // her bliver der kun kastet en error, hvis det er vores valideringsmetoder, der ikke virker... // tror jeg
        } catch (LoginSampleException ex) {

        String errorMessage ="The retrived password or username did not match, please try again.";
             Logger.getLogger(Login.class.getName()).log(Level.SEVERE, null, ex);
            request.setAttribute("errorMessage", errorMessage );
            try {
                request.getRequestDispatcher("/index.jsp").forward(request, response);
            } catch (ServletException | IOException ex1) {
                Logger.getLogger(Login.class.getName()).log(Level.SEVERE, null, ex1);
            }
        }
        return null;
}
}