package labbar;

import javax.swing.JOptionPane;


public class UserInterface {
    public static void printMessage(String message) {
        JOptionPane.showMessageDialog(null, message);
    }

    public static int askForInt(String message) {
        String input = JOptionPane.showInputDialog(message);
        if (input == null) return -2;

        // Shadow input
        input = input.chars()
            .filter(Character::isDigit)
            .collect(StringBuilder::new, StringBuilder::appendCodePoint, StringBuilder::append)
            .toString();

        try {
            return Integer.parseInt(input);
        } catch (NumberFormatException e) {
            return -1;
        }
    }
}