src/main/java/design/controller/userinput/Menu.java


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package design.controller.userinput;

import java.util.*;

public abstract class Menu {
    public abstract String getTitle();

    public abstract List<MenuOption> getMenuOptions();

    public void present() {
        var menuOptions = getMenuOptions();
        System.out.printf("-- %s --\n", getTitle().toUpperCase());
        for (int i = 0; i < menuOptions.size(); i++) {
            MenuOption menuOption = menuOptions.get(i);
            System.out.printf("%s: %s\n", i, menuOption.getName());
        }
        Scanner sc = new Scanner(System.in);
        var line = sc.nextLine();
        var split = line.split(" ");

        try {
            int i = Integer.parseInt(split[0]);
            menuOptions.get(i).onCommand(Arrays.copyOfRange(split, 1, split.length));
        } catch (ArrayIndexOutOfBoundsException ex) {
            System.err.printf("Invalid option \"%s\"\n", line);
            present();
        }
    }

}