private async Task <Tuple <Stream, FileDto> > GetConcreteVersionOfFile(Node file, int versionOfFile)
{
var getVersionOfFile =
await _unitOfWork.FileVersionRepository.GetFileVersionOfVersionNumber(file, versionOfFile);
if (getVersionOfFile == null)
{
State.TypeOfError = TypeOfServiceError.NotFound;
State.ErrorMessage = "Requeset version not found!";
return(Tuple.Create <Stream, FileDto>(null, null));
}
var streamOfFileFromBlob = await _blobService.DownloadFileAsync(getVersionOfFile.PathToFile);
if (streamOfFileFromBlob == null)
{
State.TypeOfError = TypeOfServiceError.ConnectionError;
State.ErrorMessage = "Error with getting file from Azure blob storage!";
return(Tuple.Create <Stream, FileDto>(null, null));
}
// Set start position of the stream
streamOfFileFromBlob.Position = 0;
return(Tuple.Create(streamOfFileFromBlob, Mapper.Map <Node, FileDto>(file)));
}