using System.Windows.Input;

namespace VideoDownloader.Avalonia;

/// <summary>간단한 ICommand 구현(CommunityToolkit 없이 MVVM 커맨드 바인딩용).</summary>
public sealed class RelayCommand : ICommand
{
    private readonly Action<object?> _execute;
    private readonly Func<object?, bool>? _canExecute;
    public RelayCommand(Action<object?> execute, Func<object?, bool>? canExecute = null)
    { _execute = execute; _canExecute = canExecute; }
    public bool CanExecute(object? parameter) => _canExecute?.Invoke(parameter) ?? true;
    public void Execute(object? parameter) => _execute(parameter);
    public event EventHandler? CanExecuteChanged;
    public void RaiseCanExecuteChanged() => CanExecuteChanged?.Invoke(this, EventArgs.Empty);
}