bluflame/intromat/Intromat/Actions/Hierarchy/CreateFolderAction.cs

using DynamicData;
using Intromat.Interfaces;
using Intromat.ViewModels;

namespace Intromat.Actions.Hierarchy
{
    public class CreateFolderAction : IUndoItem
    {
        private readonly FolderViewModel _folder;
        private readonly FolderViewModel _parent;

        public CreateFolderAction(string name, ModuleViewModel module, FolderViewModel parent)
        {
            _folder = new FolderViewModel(module, parent, name);
            _parent = parent;
            File = module;
        }

        public IFile File { get; }

        public void Redo()
        {
            _parent.Folders.Add(_folder);
            _parent.IsExpanded = true;
            _folder.IsSelected = true;
        }

        public void Undo()
        {
            _parent.Folders.Remove(_folder);
            _parent.IsSelected = true;
        }
    }
}