Umbraco-CMS/src/Umbraco.Core/IO/ShadowFileSystems.cs

using System;

namespace Umbraco.Core.IO
{
    // shadow filesystems is definitively ... too convoluted

    internal class ShadowFileSystems : ICompletable
    {
        private readonly FileSystems _fileSystems;
        private bool _completed;

        // invoked by the filesystems when shadowing
        public ShadowFileSystems(FileSystems fileSystems, Guid id)
        {
            _fileSystems = fileSystems;
            Id = id;

            _fileSystems.BeginShadow(id);
        }

        // for tests
        public Guid Id { get; }

        // invoked by the scope when exiting, if completed
        public void Complete()
        {
            _completed = true;
        }

        // invoked by the scope when exiting
        public void Dispose()
        {
            _fileSystems.EndShadow(Id, _completed);
        }
    }
}