public void StartDownload(PreparedDownload download)
{
lock (active)
{
StartDownloadUnsafe(download);
}
}
private void StartDownloadUnsafe(PreparedDownload download)
{
if (!registered.Contains(download))
{
download.StateChanged += dl_StateChanged;
registered.Add(download);
DownloadsAdded.RaiseEvent(this, new[] { download });
}
Directory.CreateDirectory(Path.GetDirectoryName(download.FilePath));
active.Add(download);
download.State = DownloadState.Active;
download.Item.Module.StartDownload(download);
}
private void RemoveActive(PreparedDownload download)
{
lock (active)
{
PreparedDownload dl;
while (active.Contains(download))
{
if (active.TryTake(out dl))
{
break;
}
}
}
ProcessQueue();
}
private void dl_StateChanged(object sender, ValueChangedEventArgs <DownloadState> e)
{
PreparedDownload download = (PreparedDownload)sender;
switch (e.NewValue)
{
case DownloadState.Active:
break;
case DownloadState.Completed:
RemoveActive(download);
completed.Add(download);
break;
case DownloadState.Failed:
RemoveActive(download);
stopped.Add(download);
break;
case DownloadState.Processing:
break;
case DownloadState.Queued:
lock (queued)
{
if (!queued.Contains(download))
{
queued.Enqueue(download);
}
}
break;
case DownloadState.Stopped:
RemoveActive(download);
stopped.Add(download);
break;
}
}
private void ProcessQueue()
{
//Dont let anything touch the active downloads when we are processing the queue
lock (active)
{
lock (queued)
{
if (!queued.IsEmpty)
{
if (active.Count < maxConcurrentDownloads)
{
PreparedDownload dl = null;
while (!queued.IsEmpty && !queued.TryDequeue(out dl))
{
}
if (dl != null)
{
StartDownloadUnsafe(dl);
}
}
}
}
}
}
public abstract void StopDownload(PreparedDownload download);
public void StopDownload(PreparedDownload download)
{
download.Item.Module.StopDownload(download);
download.State = DownloadState.Stopped;
}
private void StartDownloadUnsafe(PreparedDownload download)
{
if (!registered.Contains(download))
{
download.StateChanged += dl_StateChanged;
registered.Add(download);
DownloadsAdded.RaiseEvent(this, new[] { download });
}
Directory.CreateDirectory(Path.GetDirectoryName(download.FilePath));
active.Add(download);
download.State = DownloadState.Active;
download.Item.Module.StartDownload(download);
}
private void RemoveActive(PreparedDownload download)
{
lock (active)
{
PreparedDownload dl;
while (active.Contains(download))
{
if (active.TryTake(out dl))
{
break;
}
}
}
ProcessQueue();
}
public void StopDownload(PreparedDownload download)
{
download.Item.Module.StopDownload(download);
download.State = DownloadState.Stopped;
}
public void StartDownload(PreparedDownload download)
{
lock (active)
{
StartDownloadUnsafe(download);
}
}
public abstract void StopDownload(PreparedDownload download);
