/**** Git Credential Manager for Windows ****
 *
 * Copyright (c) GitHub Corporation
 * All rights reserved.
 *
 * MIT License
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the """"Software""""), to deal
 * in the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 * the Software, and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED *AS IS*, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE."
**/

using System;
using System.Windows.Input;

namespace GitHub.Shared.Helpers
{
    /// <summary>
    /// Command that performs the specified action when invoked.
    /// </summary>
    public class ActionCommand : ICommand
    {
        private Action<object> _commandAction;

        public ActionCommand(Action commandAction) : this(_ => commandAction())
        { }

        public ActionCommand(Action<object> commandAction)
        {
            _commandAction = commandAction;
        }

        public event EventHandler CanExecuteChanged;

        private bool _isEnabled = true;

        public bool IsEnabled
        {
            get { return _isEnabled; }
            set
            {
                _isEnabled = value;
                CanExecuteChanged?.Invoke(this, EventArgs.Empty);
            }
        }

        public bool CanExecute(object parameter)
        {
            return _isEnabled;
        }

        public void Execute(object parameter)
        {
            if (CanExecute(parameter))
            {
                _commandAction(parameter);
            }
        }
    }
}
