Inertia – Rev 1

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using System;
using System.Threading;
using System.Threading.Tasks;

namespace Inertia
{
    public class ScheduledContinuation : IDisposable
    {
        #region Private Delegates, Events, Enums, Properties, Indexers and Fields

        private CancellationTokenSource _cancellationTokenSource;

        private Task _task;

        #endregion

        #region Constructors, Destructors and Finalizers

        public void Dispose()
        {
            if (_cancellationTokenSource != null)
            {
                _cancellationTokenSource?.Cancel();
                _cancellationTokenSource?.Dispose();
                _cancellationTokenSource = null;
            }
        }

        #endregion

        #region Public Methods

        public void Schedule(TimeSpan delay, Action execute)
        {
            if (_cancellationTokenSource != null)
            {
                _cancellationTokenSource.Cancel();
                _cancellationTokenSource.Dispose();
                _cancellationTokenSource = null;
            }

            _cancellationTokenSource = new CancellationTokenSource();

            _task = Task.Delay(delay, _cancellationTokenSource.Token)
                .ContinueWith(task =>
                {
                    try
                    {
                        execute.Invoke();
                    }
                    catch (Exception ex) when (ex is ObjectDisposedException || ex is OperationCanceledException)
                    {
                    }
                }, _cancellationTokenSource.Token);
        }

        #endregion
    }
}

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