public async Task <UploadId> Handle(UploadFilesCommand request, CancellationToken cancellationToken)
{
AppUserEntity?uploader = await context.Entities.AppUsers.FirstOrDefaultAsync(x => x.UserName == context.Requestor.UserName.Value);
if (uploader is null)
{
throw new ArgumentException("Invalid requestor."); // todo: custom exception
}
UtcTimestamp startTimestamp = context.UtcNow;
var tempFiles = new List <FileEntity>();
var duplicates = new List <string>();
foreach (SourceFile sourceFile in request.Parameters.SourceFiles)
{
UtcTimestamp timestamp = context.UtcNow;
Sha256Hash hash = sha256Generator.GenerateHash(sourceFile.Content);
if (IsDuplicate(hash))
{
duplicates.Add(sourceFile.OrginalFileName ?? "???");
}
else
{
string newFileName = FileUtils.GetRandomFileNameWithTimestamp(timestamp.Value, sourceFile.OrginalFileName);
IFileInfo fileInfo = fileDatabase.SourceFiles.Create(sourceFile.Content, new FileName(newFileName));
ThumbnailMakerResult?thumbResult = thumbnailMaker.TryMakeAndSaveThumbnail(fileInfo, timestamp);
var fileEntity = new FileEntity
{
MimeType = sourceFile.MimeType.Value,
FileName = sourceFile.OrginalFileName,
UtcWhenAdded = timestamp.Value,
SourceFileName = newFileName,
SourceFileSize = sourceFile.Content.Length,
Description = null,
Title = null,
Hash = hash.ToHexString(),
PrimaryDateTime = null,
Image = new ImageEntity()
{
Width = thumbResult?.OrginalImageSize.Width,
Height = thumbResult?.OrginalImageSize.Height,
ThumbnailFileName = thumbResult?.ThumbnailFileName.Value,
},
Uploader = uploader
};
tempFiles.Add(fileEntity);
}
}
var uploadEntity = new UploadEntity
{
Description = request.Parameters.Description.Value,
UtcWhenAdded = startTimestamp.Value,
FileCount = tempFiles.Count,
TotalSize = tempFiles.Select(x => x.SourceFileSize).Aggregate(0L, (a, b) => a + b),
Uploader = uploader
};
foreach (var file in tempFiles)
{
file.Upload = uploadEntity;
// TODO: handle 0 files as error
}
context.Entities.Files.AddRange(tempFiles);
await context.Entities.SaveChangesAsync();
logger.Add($"New upload #{uploadEntity.Id}. Files added (except duplicates): {uploadEntity.FileCount}");
return(new UploadId(uploadEntity.Id));
}
//====== private methods
private bool IsDuplicate(Sha256Hash hash)
{
// todo: performance?
return(context.Entities.Files.AsNoTracking().Any(x => x.Hash == hash.ToHexString()));
}