UI/ViewModels/EditInsect/EditInsectViewModelBase.cs - server - dOJer113/Insect

UI/ViewModels/EditInsect/EditInsectViewModelBase.cs
77 строк2 KB
alex
Валидация
21 дек 2025, 20:06
21 дек 2025, 20:06640f9dc
using System.Reactive;
using System.Threading.Tasks;
using insects;
using UI.Models;
using ReactiveUI;

namespace UI.ViewModels.EditInsect;

/// <summary>
/// Базовая VM для модальных окон насекомых.
/// </summary>
public abstract class EditInsectViewModelBase<T> : ViewModelBase, IEditInsectDialogViewModel where T : Insect
{
  private readonly Mode _mode;
  private string _validationMessage = string.Empty;
  private bool _hasValidationMessage;

  protected EditInsectViewModelBase(T? insect, Mode mode)
  {
    Editable = (T?)insect?.Clone() ?? CreateDefault();
    _mode = mode;
    Title = BuildTitle(mode);
    ConfirmCommand = ReactiveCommand.CreateFromTask(ValidateAndReturnAsync);
  }

  public T Editable { get; }
  Insect UI.ViewModels.EditInsect.IEditInsectDialogViewModel.Editable => Editable;

  public bool IsReadOnly => _mode == Mode.Delete;

  public bool ShowId => _mode != Mode.Create && _mode != Mode.InitializePrototype;

  public string Title { get; }

  public ReactiveCommand<Unit, T?> ConfirmCommand { get; }

  public string ValidationMessage
  {
    get => _validationMessage;
    private set
    {
      this.RaiseAndSetIfChanged(ref _validationMessage, value);
      HasValidationMessage = !string.IsNullOrWhiteSpace(value);
    }
  }

  public bool HasValidationMessage
  {
    get => _hasValidationMessage;
    private set => this.RaiseAndSetIfChanged(ref _hasValidationMessage, value);
  }

  protected abstract T CreateDefault();

  protected abstract string BuildTitle(Mode mode);

  private async Task<T?> ValidateAndReturnAsync()
  {
    var errors = InsectValidator.Validate(Editable, requireId: ShowId);
    if (errors.Count > 0)
    {
      ValidationMessage = string.Join("\n", errors);
      return null;
    }

    await Task.CompletedTask;
    ValidationMessage = string.Empty;
    return Editable;
  }

  public Mode Mode => _mode;

  public void SetServerError(string message)
  {
    ValidationMessage = message;
  }
}