File Flitter

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading;

namespace FileFlit
{
	public class Monitor
	{
		protected List<FileSystemWatcher> watchList;
		protected static Monitor monitor;

		public static void Go(List<FlitterRecord> fileList)
		{
			if (monitor == null)
			{
				monitor = new Monitor();
			}

			monitor.WatchFiles(fileList);
		}

		public static void UpdateNow(List<FlitterRecord> fileList)
		{
			foreach (FlitterRecord fr in fileList)
			{
				try
				{
					File.Copy(fr.SourceFile, Path.Combine(fr.DestinationFolder, Path.GetFileName(fr.SourceFile)), true);
					Form1.Log(true, fr);
				}
				catch (Exception e)
				{
					Form1.Log(false, fr, e.Message);
				}
			}
		}

		public Monitor()
		{
			watchList = new List<FileSystemWatcher>();
		}

		protected void WatchFiles(List<FlitterRecord> fileList)
		{
			foreach (FileSystemWatcher fsw in watchList)
			{
				fsw.Changed -= OnChanged;
			}

			List<FileSystemWatcher> newWatchList = new List<FileSystemWatcher>();

			foreach (FlitterRecord fr in fileList)
			{
				FlitterFileSystemWatcher fsw = new FlitterFileSystemWatcher(Path.GetDirectoryName(fr.SourceFile), Path.GetFileName(fr.SourceFile)) { FlitterRecord = fr };
				fsw.NotifyFilter = NotifyFilters.LastWrite;
				fsw.Changed += new FileSystemEventHandler(OnChanged);
				fsw.EnableRaisingEvents = true;
				newWatchList.Add(fsw);
			}

			watchList = newWatchList;
		}

		protected void OnChanged(object sender, FileSystemEventArgs e)
		{
			FlitterRecord fr = ((FlitterFileSystemWatcher)sender).FlitterRecord;
			bool success=false;
			int retries = 3;

			while (!success)
			{
				try
				{
					Thread.Sleep(fr.Delay);
					File.Copy(fr.SourceFile, Path.Combine(fr.DestinationFolder, Path.GetFileName(fr.SourceFile)), true);
					success = true;
				}
				catch(Exception ex)
				{
					if (--retries == 0)
					{
						Form1.Log(false, fr, ex.Message);
						break;
					}
				}

				if (success)
				{
					Form1.Log(true, fr);
				}
			}
		}
	}
}