bluflame/intromat/Intromat/ViewModels/UndoItemGroup.cs

using System.Collections.Generic;
using System.Linq;
using Intromat.Interfaces;
using ReactiveUI;

namespace Intromat.ViewModels
{
    public class UndoItemGroup : ReactiveObject, IUndoItem
    {
        public List<IUndoItem> Items = new();

        public UndoItemGroup(IFile file)
        {
            File = file;
        }

        public IFile File { get; }

        public void Redo()
        {
            foreach (var item in Items)
                item.Redo();
        }

        public void Undo()
        {
            foreach (var item in Items.Reverse<IUndoItem>())
                item.Undo();
        }

        public void Push(IUndoItem item)
        {
            Items.Add(item);
        }
    }
}