public async Task <ImageShortInfo> DeleteOriginalImageMetadata(string imageId, string partitionKey)
{
_logger.LogDebug(MetadataRemoving, imageId, partitionKey);
var metadata = await _metadataStorage.GetMetadata(new List <string> {
imageId
}, partitionKey, CancellationToken.None);
if (metadata == null || !metadata.Any())
{
return(null);
}
var deletedMetadata = await _metadataStorage.RemoveMetadata(imageId, partitionKey, CancellationToken.None);
if (!deletedMetadata)
{
return(null);
}
_logger.LogInformation(MetadataRemoved, imageId);
var imageMetadata = metadata[0];
return(new ImageShortInfo
{
ImageId = imageMetadata.Id,
ImageName = imageMetadata.Name,
ThumbnailNames = imageMetadata.Thumbnails != null
? imageMetadata.Thumbnails.Select(x => x.Name).ToArray()
: new string[0]
});
}
public async Task <ImagesSearchResult> Search(string[] imageIds, string partitionKey)
{
var imagesMetadata = await _metadataStorage.GetMetadata(imageIds, partitionKey, CancellationToken.None);
ImagesSearchResult result = new ImagesSearchResult
{
Images = new List <ImageFullInfoWithThumbnails>(imagesMetadata.Count)
};
foreach (var imageMetadata in imagesMetadata)
{
var model = new ImageFullInfoWithThumbnails
{
Id = imageMetadata.Id,
Bytes = imageMetadata.SizeBytes,
Hash = imageMetadata.MD5Hash,
Height = imageMetadata.Height,
Width = imageMetadata.Width,
Tags = imageMetadata.Tags ?? new Dictionary <string, string>(),
Url = _blobStorage.GetImageUri(imageMetadata.Name, ImageSizeType.Original).ToString(),
DateAdded = imageMetadata.DateAddedUtc,
MimeType = imageMetadata.MimeType,
Thumbnails = new List <ImageInfo>()
};
//todo if an image was added a long time ago and there are not any thumbnails, it's worth sending a new event to generate them
if (imageMetadata.Thumbnails != null)
{
foreach (var thumbnail in imageMetadata.Thumbnails)
{
model.Thumbnails.Add(new ImageInfo
{
Id = thumbnail.Id,
Bytes = thumbnail.SizeBytes,
Hash = thumbnail.MD5Hash,
Height = thumbnail.Height,
Width = thumbnail.Width,
DateAdded = thumbnail.DateAddedUtc,
MimeType = thumbnail.MimeType,
Url = _blobStorage.GetImageUri(thumbnail.Name, ImageSizeType.Thumbnail).ToString()
});
}
}
result.Images.Add(model);
}
_logger.LogInformation(FoundImages, result.Images.Count, imageIds.Length);
return(result);
}
public async Task <List <ImageThumbnailGeneratingResult> > GenerateThumbnails(string imageId, string partitionKey)
{
var imageMetadataList = await _metadataStorage.GetMetadata(new List <string> {
imageId
}, partitionKey, CancellationToken.None);
if (imageMetadataList == null || !imageMetadataList.Any())
{
_logger.LogInformation(ImageNotFound, imageId);
return(null);
}
var imageMetadata = imageMetadataList[0];
imageMetadata.Thumbnails = new List <ImageThumbnail>();
_logger.LogDebug(MetadataReceived, imageMetadata.Id, imageMetadata.Width, imageMetadata.Height);
if (imageMetadata.Width <= _thumbnailTargetWidth.Last())
{
_logger.LogInformation(ImageSmallerThanTargetWidth, imageMetadata.Id, imageMetadata.Width);
return(new List <ImageThumbnailGeneratingResult>(0));
}
using var originalImageStream = await _blobStorage.DownloadImage(imageMetadata.Name, ImageSizeType.Original, CancellationToken.None);
_logger.LogDebug(ImageDownloaded, imageMetadata.Id);
StorageImageType imageType = imageMetadata.ImageType;
string mimeType = imageMetadata.MimeType;
string fileExtension = imageMetadata.FileExtension;
if (imageType == StorageImageType.BMP)
{
imageType = StorageImageType.PNG;
mimeType = PngMimeType;
fileExtension = PngFileExtension;
}
var imageStream = originalImageStream;
foreach (var targetWidth in _thumbnailTargetWidth)
{
if (targetWidth >= imageMetadata.Width)
{
continue;
}
var resizingResult = _imageResizing.Resize(imageStream, (ImageType)imageType, targetWidth);
_logger.LogDebug(ImageResized, imageMetadata.Id, resizingResult.Size);
var thumbnailImageId = _imageIdentifierProvider.GenerateUniqueId();
var thumbnailImageName = _imageIdentifierProvider.GetImageName(thumbnailImageId, fileExtension);
var uploadedBlob = await _blobStorage.UploadImage(thumbnailImageName, resizingResult.Image, ImageSizeType.Thumbnail, mimeType, CancellationToken.None);
imageMetadata.Thumbnails.Add(new ImageThumbnail
{
Id = thumbnailImageId,
Name = thumbnailImageName,
MD5Hash = uploadedBlob.MD5Hash,
DateAddedUtc = uploadedBlob.DateAdded.DateTime,
MimeType = mimeType,
Height = resizingResult.Size.Height,
Width = resizingResult.Size.Width,
SizeBytes = resizingResult.Size.Bytes
});
imageStream = resizingResult.Image;
}
imageStream.Dispose();
imageMetadata.Thumbnails.Reverse();
await _metadataStorage.SetMetadata(imageMetadata, CancellationToken.None);
_logger.LogInformation(ThumbnailsGenerated, imageMetadata.Thumbnails.Count, imageId);
return(imageMetadata.Thumbnails.Select(x => new ImageThumbnailGeneratingResult
{
Id = x.Id,
Width = x.Width,
Height = x.Height,
MimeType = x.MimeType
}).ToList());
}