Method deleteFilesByNamesList

core/field_file.go:577–624

deleteFiles deletes a list of record files by their names. Returns the failed/remaining files.

(ctx context.Context, app App, record *Record, filenames []string)

// deleteFiles deletes a list of record files by their names.
// Returns the failed/remaining files.
func (f *FileField) deleteFilesByNamesList(ctx context.Context, app App, record *Record, filenames []string) ([]string, error) {
	if len(filenames) == 0 {
		return nil, nil // nothing to delete
	}

	if record.Id == "" {
		return filenames, errors.New("the record doesn't have an id")
	}

	fsys, err := app.NewFilesystem()
	if err != nil {
		return filenames, err
	}
	defer fsys.Close()
	fsys.SetContext(ctx)

	var failures []error

	for i := len(filenames) - 1; i >= 0; i-- {
		filename := filenames[i]
		if filename == "" || strings.ContainsAny(filename, "/\\") {
			continue // empty or not a plain filename
		}

		path := record.BaseFilesPath() + "/" + filename

		err := fsys.Delete(path)
		if err != nil && !errors.Is(err, filesystem.ErrNotFound) {
			// store the delete error
			failures = append(failures, fmt.Errorf("file %d (%q): %w", i, filename, err))
		} else {
			// remove the deleted file from the list
			filenames = append(filenames[:i], filenames[i+1:]...)

			// try to delete the related file thumbs (if any)
			thumbsErr := fsys.DeletePrefix(record.BaseFilesPath() + "/thumbs_" + filename + "/")
			if len(thumbsErr) > 0 {
				app.Logger().Warn("Failed to delete file thumbs", "error", errors.Join(thumbsErr...))
			}
		}
	}

	if len(failures) > 0 {
		return filenames, fmt.Errorf("failed to delete all files: %w", errors.Join(failures...))
	}

	return nil, nil
}

// newContextIfInvalid returns a new Background context if the provided one was cancelled.
func newContextIfInvalid(ctx context.Context) context.Context {