public async Task <bool?> MoveNextAsync()
{
if (CancellationToken.IsCancellationRequested)
{
return(false);
}
if (position >= Max)
{
return(null);
}
var pos = Interlocked.Increment(ref position);
if (pos < tasks.Length)
{
var tsk = tasks[pos]();
await tsk;
MovedNext?.Invoke(this, pos);
return(true);
}
else
{
Done?.Invoke(this);
}
return(false);
}
private void AddCore(DownloadLink link)
{
var tokeSource = new CancellationTokenSource();
var tasks = link.Downloader.EmitTasks(link.Request, tokeSource.Token);
var downloadTask = new DownloadTask(tasks, tokeSource.Token);
var box = new DownloadBox(downloadTask, link)
{
TokenSource = tokeSource
};
box.Canceled += Box_Canceled;
downloadTask.MovedNext += (a, b) =>
{
MovedNext?.Invoke(this, a, b);
};
downloadTask.Seeked += (a, b) =>
{
Seeked?.Invoke(this, a, b);
};
downloadTask.Done += async w =>
{
await RemoveAsync(box.Address);
Done?.Invoke(this, box);
};
downloadMap.Add(link.Request.Entity.ComicUrl, box);
downloadManager.Add(downloadTask);
Added?.Invoke(this, box);
}
