PiperFeladat/Feladat1/UI/MainWindow/MainWindow.cs

using Adw;
using Logic;

namespace Feladat1.UI.MainWindow;

public class MainWindow
{
    private IUserService userService;
    private const string windowId = "main_window";

    public Window Window;

    private Gtk.Button saveBtn;
    private const string saveBtnId = "save_btn";

    private EntryRow emailField;
    private const string emailFieldId = "email";

    private EntryRow userNameField;
    private const string userNameFieldId = "username";

    private PasswordEntryRow passwordField;
    private const string passwordFieldId = "password";

    public MainWindow()
    {
        var builder = new Gtk.Builder("Feladat1.UI.MainWindow.MainWindow.ui.xml");

        Window = builder.GetObject(windowId) as Window;
        if (Window == null)
        {
            throw new Exception("Failed to load embedded resource MainWindow.ui.xml");
        }

        try
        {
            saveBtn = builder.GetObject(saveBtnId) as Gtk.Button;
            if (saveBtn == null)
            {
                throw new NullReferenceException(saveBtnId);
            }
            saveBtn.OnClicked += (sender, args) => Save();

            emailField = builder.GetObject(emailFieldId) as EntryRow;
            if (emailField == null)
            {
                throw new NullReferenceException(emailFieldId);
            }

            userNameField = builder.GetObject(userNameFieldId) as EntryRow;
            if (userNameField == null)
            {
                throw new NullReferenceException(userNameFieldId);
            }

            passwordField = builder.GetObject(passwordFieldId) as PasswordEntryRow;
            if (passwordField == null)
            {
                throw new NullReferenceException(passwordFieldId);
            }
        }
        catch (NullReferenceException e)
        {
            Console.WriteLine($"Failed to load UI element with ID: {e.Message}");
            Window.Close();
        }
    }

    private bool ValidateFields()
    {
        if (userNameField.Text_ != null && emailField.Text_ != null && passwordField.Text_ != null)
        {
            return true;
        }
        return false;
    }

    private void Save()
    {
        if (ValidateFields())
        {
            userService.Create(userNameField.GetText(), emailField.GetText(), passwordField.GetText());
        }
    }
}