add ocr pipeline

backend/service/resources.go

@@ -104,30 +104,51 @@ func (s *Resources) SearchFiles(ownerID, q string, page, pageSize int) ([]FileDT
 // Upload persists the multipart-sourced file under UploadDir/<user> and
 // records its metadata, returning the FileDTO. The physical file is removed
 // if metadata persistence fails (e.g. name conflict).
-func (s *Resources) Upload(ownerID string, file *multipart.FileHeader, folderID string) (FileDTO, error) {
+//
+// When resourceID is non-empty the upload TARGETS an existing file owned by
+// the user (metadata-only resource from the outbox, or a previously uploaded
+// file): the bytes are written under UploadDir/<user>/<resourceID>.<ext> and
+// only the physical metadata (size/mime/extension) is refreshed — never a
+// rename, never a move, never a duplicate row. Unknown / foreign resource →
+// repo.ErrNotFound.
+func (s *Resources) Upload(ownerID string, file *multipart.FileHeader, folderID, resourceID string) (FileDTO, error) {
 	if file.Size > s.MaxFileSize {
 		return FileDTO{}, ErrFileTooLarge
 	}
 
-	id := repository.NewID()
+	targetExisting := resourceID != ""
+	if targetExisting {
+		if _, err := s.Repo.GetFile(ownerID, resourceID); err != nil {
+			return FileDTO{}, err
+		}
+	} else {
+		resourceID = repository.NewID()
+	}
+
 	extension := strings.TrimPrefix(filepath.Ext(file.Filename), ".")
 	destDir := filepath.Join(s.UploadDir, ownerID)
 	if err := os.MkdirAll(destDir, 0o755); err != nil {
 		return FileDTO{}, fmt.Errorf("create upload dir: %w", err)
 	}
 
-	destPath := filepath.Join(destDir, id+"."+extension)
+	destPath := filepath.Join(destDir, resourceID+"."+extension)
 	if err := copyMultipart(file, destPath); err != nil {
 		return FileDTO{}, err
 	}
 
 	mimeType := file.Header.Get("Content-Type")
-	if err := s.Repo.InsertFile(ownerID, id, file.Filename, folderID, file.Size, &mimeType, &extension); err != nil {
+	var err error
+	if targetExisting {
+		err = s.Repo.UpdatePhysical(ownerID, resourceID, file.Size, &mimeType, &extension)
+	} else {
+		err = s.Repo.InsertFile(ownerID, resourceID, file.Filename, folderID, file.Size, &mimeType, &extension)
+	}
+	if err != nil {
 		_ = os.Remove(destPath)
 		return FileDTO{}, err
 	}
 
-	row, err := s.Repo.GetFile(ownerID, id)
+	row, err := s.Repo.GetFile(ownerID, resourceID)
 	if err != nil {
 		return FileDTO{}, err
 	}