public async Task<SavedFile> Assemble(FileAssemblyRequest item)
{
SavedFile savedFileInformation = await ChunkedFileStorageService.AssembleFileFromBlocksAsync(item);
//todo, get file information back from save call
byte[] fileContents = ChunkedFileStorageService.RetrieveFileContents(savedFileInformation);
ExtractedImageInformation exInfo = new ExtractedImageInformation();
exInfo.File = savedFileInformation;
InformationExtractor extractor = new InformationExtractor();
exInfo = extractor.GetImageInformation(savedFileInformation, fileContents, exInfo);
//generate thumbnail
byte[] thumbnailBytes = new ThumbnailGenerator().GenerateThumbnail(fileContents);
exInfo.Preview = ChunkedFileStorageService.SaveFileWithoutChunking(savedFileInformation.UploadedFileName, "thumbnail", thumbnailBytes);
//write to raven
StoredImage info = Mapper.Map<StoredImage>(exInfo);
info.UploadDateTime = DateTime.Now;
await RavenSession.StoreAsync(info);
//signal the hub that we are done
var context = GlobalHost.ConnectionManager.GetHubContext<PictureProcessHub>();
context.Clients.All.pictureprocessed(Mapper.Map<ProcessedImageViewModel>(info));
return savedFileInformation;
}
public ExtractedImageInformation GetImageInformation(SavedFile savedFileInformation, byte[] fileContents, ExtractedImageInformation info)
{
//TODO, I Should be a parallel async call
info = new TaglibExtractor().ExtractTags(savedFileInformation.StorageFileName, fileContents, info);
if (string.IsNullOrWhiteSpace(info.Title))
{
info.Title = MakeTitleFromFileName(savedFileInformation.UploadedFileName);
}
return info;
}
public ExtractedImageInformation ExtractTags(string sourcePath, byte[] sourceArray, ExtractedImageInformation info)
{
using (var file = new MemoryStreamFileAbstraction(sourcePath, sourceArray))
{
using (var imageFile = TagLib.File.Create(file) as TagLib.Image.File)
{
info.Orientation = (int)imageFile.ImageTag.Orientation;
info.Latitude = imageFile.ImageTag.Latitude;
info.Longitude = imageFile.ImageTag.Latitude;
info.Timestamp = imageFile.ImageTag.DateTime;
info.Title = imageFile.ImageTag.Title;
return info;
}
}
}
