private string GetFileExtensionForDataFormat(byte[] fileBytes)
{
var imageFormat = ImageFormatDetector.GetImageFormat(fileBytes);
if (imageFormat == ImageFormat.Unknown)
{
throw new NotImplementedException();
}
return(imageFormat.GetFileExtensionForImageFormat().Replace("*", string.Empty));
}
private async Task <FileData> GetFileData(IDbConnection connection, IGuidGenerator guidGenerator,
FileRepository fileRepository, string md5HashString,
byte[] fileBytes, string fileName, string fileExtension)
{
if (!await fileRepository.HasFileWithSameHashAsync(connection, md5HashString))
{
var fileId = guidGenerator.GenerateGuid();
return(new FileData(fileId, true, ImageFormatDetector.GetImageFormat(fileBytes) != ImageFormat.Unknown,
fileBytes, md5HashString, fileBytes.LongLength, fileName, fileExtension));
}
var fileDataFromStore = await fileRepository.GetFileByMd5HashAsync(connection, md5HashString);
return(new FileData(fileDataFromStore.FileId, false,
ImageFormatDetector.GetImageFormat(fileDataFromStore.Binary) != ImageFormat.Unknown,
fileDataFromStore.Binary, fileDataFromStore.Md5Hash, fileDataFromStore.Size, fileDataFromStore.Name,
fileDataFromStore.Extension));
}
private async Task <GenericDataContainer> FixMissingMetadata(string dataType, string id, byte[] binaryData)
{
// Assumption: Metadata doesn't exist
var blob = binaryDataStorage.GetBlob(dataType, id);
DateTime createdTimeUtc;
DateTime submissionTimeUtc;
if (await blob.ExistsAsync())
{
createdTimeUtc = blob.CreatedTimestampUtc;
submissionTimeUtc = blob.LastModifiedTimestampUtc;
}
else
{
var utcNow = DateTime.UtcNow;
createdTimeUtc = utcNow;
submissionTimeUtc = utcNow;
}
IId obj;
switch (dataType)
{
case nameof(DataBlob):
obj = new DataBlob(id, new byte[0]);
break;
case nameof(Image):
var imageFormat = ImageFormatDetector.Detect(binaryData);
var imageExtension = imageFormat != ImageFormatDetector.ImageFormat.Unknown ? imageFormat.GetFileExtension() : ".bin";
obj = new Image(id, new byte[0], imageExtension);
break;
default:
throw new NotSupportedException($"Cannot fix missing metadata for ID '{id}' of data type '{dataType}'");
}
var container = new GenericDataContainer("unknown", createdTimeUtc, "unknown", submissionTimeUtc, ApiVersion.Current, obj);
await metadataStorage.StoreAsync(dataType, container, false);
return(container);
}
