using System.Windows.Input;

namespace Serein.Workbench.Node
{

    public 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 event EventHandler CanExecuteChanged;

        public bool CanExecute(object parameter) => _canExecute == null || _canExecute(parameter);

        public void Execute(object parameter) => _execute(parameter);

        public void RaiseCanExecuteChanged() => CanExecuteChanged?.Invoke(this, EventArgs.Empty);
    }

}
