Chris@0: /**
Chris@0:  * Implements hook_file_move().
Chris@0:  */
Chris@0: function {{ machine_name }}_file_move(Drupal\file\FileInterface $file, Drupal\file\FileInterface $source) {
Chris@0:   // Make sure that the file name starts with the owner's user name.
Chris@0:   if (strpos($file->getFilename(), $file->getOwner()->name) !== 0) {
Chris@0:     $file->setFilename($file->getOwner()->name . '_' . $file->getFilename());
Chris@0:     $file->save();
Chris@0: 
Chris@0:     \Drupal::logger('file')->notice('Moved file %source has been renamed to %destination', ['%source' => $source->filename, '%destination' => $file->getFilename()]);
Chris@0:   }
Chris@0: }