public void Dispatch(IViewModelBase viewModel)
{
ProcessTransferType nextTransfer;
IProcessViewModel dispatch;
void DispatchToDownload(IVideoViewModel videoViewModel)
{
nextTransfer = ProcessTransferType.Download;
dispatch = _processFactory.MakeDownloadProcessViewModel(videoViewModel);
}
void DispatchToComplete(IVideoViewModel videoViewModel, DownloadState downloadState)
{
nextTransfer = ProcessTransferType.Complete;
dispatch = _processFactory.MakeCompleteProcessViewModel(videoViewModel, downloadState);
}
switch (viewModel)
{
case IVideoViewModel videoViewModel:
{
string videoTitle = videoViewModel.Video.Title;
if (Directory.GetFiles(_settings.DownloadPath).Select(Path.GetFileNameWithoutExtension).Any(filename => filename == videoTitle))
{
DispatchToComplete(videoViewModel, DownloadState.Exited);
}
else
{
DispatchToDownload(videoViewModel);
}
}
break;
case IDownloadProcessViewModel downloadProcessViewModel:
{
if (downloadProcessViewModel.Process.Killed)
{
DispatchToComplete(downloadProcessViewModel.VideoViewModel, DownloadState.Exited);
break;
}
string destinationFilename = (string)downloadProcessViewModel.Process.ProcessMonitor.ParameterMonitorings["Destination"].Value;
FileInfo fileInfo = new FileInfo(destinationFilename);
if (_settings.OutputFormat == OutputFormat.Auto ||
_settings.OutputFormat == OutputFormat.Mp4 && fileInfo.Extension == ".mp4" ||
_settings.OutputFormat == OutputFormat.Mp3 && fileInfo.Extension == ".mp3")
{
DispatchToComplete(downloadProcessViewModel.VideoViewModel, DownloadState.Completed);
}
else
{
nextTransfer = ProcessTransferType.Convert;
ConvertProgress convertProgress = new ConvertProgress(fileInfo.Length);
ConvertProcess convertProcess = new ConvertProcess(fileInfo.FullName, _settings.OutputFormat.ToString().ToLower(), convertProgress);
dispatch = _processFactory.MakeConvertProcessViewModel(downloadProcessViewModel.VideoViewModel, convertProcess, convertProgress);
}
}
break;
case IConvertProcessViewModel convertProcessViewModel:
DispatchToComplete(convertProcessViewModel.VideoViewModel, convertProcessViewModel.Process.Killed ? DownloadState.Exited : DownloadState.Completed);
break;
default:
throw new InvalidOperationException("Cannot dispatch non-download or non-convert process.");
}
if (dispatch is IActiveProcessViewModel activeProcessViewModel)
{
void ProcessStarted(object sender, EventArgs e)
{
switch (dispatch)
{
case IDownloadProcessViewModel _:
dispatch.DownloadState = DownloadState.Downloading;
break;
case IConvertProcessViewModel _:
dispatch.DownloadState = DownloadState.Converting;
break;
}
}
void ProcessExited(object sender, EventArgs e)
{
activeProcessViewModel.Process.Started -= ProcessStarted;
activeProcessViewModel.Process.Exited -= ProcessExited;
}
activeProcessViewModel.Process.Started += ProcessStarted;
activeProcessViewModel.Process.Exited += ProcessExited;
}
_eventAggregator.BeginPublishOnUIThread(new ProcessTransferMessage(nextTransfer, dispatch.ToEnumerable()));
}