private void OnDownloading(object state)
{
DownloadablePart part = null;
lock (_itemsSyncRoot)
{
for (var i = 0; i < _items.Count; i++)
{
var item = _items[i];
if (item.Canceled)
{
_items.RemoveAt(i--);
try
{
_eventAggregator.Publish(new DownloadingCanceledEventArgs(item));
}
catch (Exception e)
{
TLUtils.WriteException(e);
}
}
}
foreach (var item in _items)
{
part = item.Parts.FirstOrDefault(x => x.Status == PartStatus.Ready);
if (part != null)
{
part.Status = PartStatus.Processing;
break;
}
}
}
if (part == null)
{
var currentWorker = (Worker)state;
currentWorker.Stop();
return;
}
bool canceled;
ProcessFilePart(part, part.ParentItem.DCId, part.ParentItem.InputLocation, out canceled);
if (canceled)
{
lock (_itemsSyncRoot)
{
part.ParentItem.Canceled = true;
part.Status = PartStatus.Processed;
_items.Remove(part.ParentItem);
}
return;
}
// indicate progress
// indicate complete
bool isComplete;
bool isCanceled;
var progress = 0.0;
lock (_itemsSyncRoot)
{
part.Status = PartStatus.Processed;
var data = part.File.Bytes.Data;
if (data.Length < part.Limit.Value && (part.Number + 1) != part.ParentItem.Parts.Count)
{
var complete = part.ParentItem.Parts.All(x => x.Status == PartStatus.Processed);
if (!complete)
{
var emptyBufferSize = part.Limit.Value - data.Length;
var position = data.Length;
var missingPart = new DownloadablePart(part.ParentItem, new TLInt(position), new TLInt(emptyBufferSize), -part.Number);
var currentItemIndex = part.ParentItem.Parts.IndexOf(part);
part.ParentItem.Parts.Insert(currentItemIndex + 1, missingPart);
}
}
isCanceled = part.ParentItem.Canceled;
isComplete = part.ParentItem.Parts.All(x => x.Status == PartStatus.Processed);
if (!isComplete)
{
var downloadedCount = part.ParentItem.Parts.Count(x => x.Status == PartStatus.Processed);
var count = part.ParentItem.Parts.Count;
progress = (double)downloadedCount / count;
}
else
{
_items.Remove(part.ParentItem);
}
}
if (!isCanceled)
{
if (isComplete)
{
byte[] bytes = { };
foreach (var p in part.ParentItem.Parts)
{
bytes = TLUtils.Combine(bytes, p.File.Bytes.Data);
}
//part.ParentItem.Location.Buffer = bytes;
var fileName = part.ParentItem.FileName.ToString();
StringLocker.Lock(fileName, () => FileUtils.WriteBytes(fileName, bytes));
if (part.ParentItem.Callback != null)
{
Execute.BeginOnThreadPool(() =>
{
part.ParentItem.Callback.SafeInvoke(part.ParentItem);
if (part.ParentItem.Callbacks != null)
{
foreach (var callback in part.ParentItem.Callbacks)
{
callback.SafeInvoke(part.ParentItem);
}
}
});
}
else
{
Execute.BeginOnThreadPool(() => _eventAggregator.Publish(part.ParentItem));
}
}
else
{
//Execute.BeginOnThreadPool(() => _eventAggregator.Publish(new ProgressChangedEventArgs(part.ParentItem, progress)));
}
}
}