public async Task UploadFilesAsync(UploadFilesCommand command)
{
// Check file metadata against upload session information
Guid sessionId = new Guid(command.UploadSessionId);
UploadSession session = await this.UploadSessionRepository.GetByIdAsync(sessionId);
if (session == null)
{
//TODO: Throw exception: the specified upload session does not exist.
throw new UploadSessionNotStartedException("No upload session has been started. Please, make sure to first start the upload session before uploading files.");
}
if (!session.IsStarted)
{
throw new UploadSessionNotStartedException("The specified upload session is not in the started state so no files can be uploaded. Please, start a new session for uploading.");
}
// Check that id's specified in the command are valid
if (!session.AreFilesRegistered(command.Files.Select(f => new Guid(f.FileId)).AsEnumerable()))
{
throw new UploadSessionFileNotRegisteredException("Some of the files specified were not previously registered for upload. Please, make sure that all files are first registered for upload at session start.");
}
// Upload files (first store file content, second update session information)
foreach (var file in command.Files)
{
Guid fileId = new Guid(file.FileId);
FileUploadDescription uploadDescription = session.GetFileUploadDescription(fileId);
// Upload file
ResourceUri sourceStoreFileUri = await this.UploadFileWithoutCommitingDomainChangesAsync(fileId, session.OwnerId, uploadDescription.FileName,
uploadDescription.ContentType, uploadDescription.ContentLength, file.Content, session.UploadAsPublic);
// Update session (mark file as uploaded and assign access uri)
ResourceUri fileAccessUri = RoutingService.BuildUriForFile(uploadDescription, sourceStoreFileUri, session.UploadAsPublic);
session.MarkFileAsUploaded(fileId);
session.AssignUriToFileDescription(fileId, fileAccessUri);
}
// Save changes
await this.unitOfWork.CommitChangesAsync();
}