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<?php
/**
* @file
* Hooks for file module.
*/
/**
* @addtogroup hooks
* @{
*/
/**
* Check that files meet a given criteria.
*
* This hook lets modules perform additional validation on files. They're able
* to report a failure by returning one or more error messages.
*
* @param \Drupal\file\FileInterface $file
* The file entity being validated.
* @return array
* An array of error messages. If there are no problems with the file return
* an empty array.
*
* @see file_validate()
*/
function hook_file_validate(Drupal\file\FileInterface $file) {
$errors = [];
if (!$file->getFilename()) {
$errors[] = t("The file's name is empty. Please give a name to the file.");
}
if (strlen($file->getFilename()) > 255) {
$errors[] = t("The file's name exceeds the 255 characters limit. Please rename the file and try again.");
}
return $errors;
}
/**
* Respond to a file that has been copied.
*
* @param \Drupal\file\FileInterface $file
* The newly copied file entity.
* @param \Drupal\file\FileInterface $source
* The original file before the copy.
*
* @see file_copy()
*/
function hook_file_copy(Drupal\file\FileInterface $file, Drupal\file\FileInterface $source) {
// Make sure that the file name starts with the owner's user name.
if (strpos($file->getFilename(), $file->getOwner()->name) !== 0) {
$file->setFilename($file->getOwner()->name . '_' . $file->getFilename());
$file->save();
\Drupal::logger('file')->notice('Copied file %source has been renamed to %destination', ['%source' => $source->filename, '%destination' => $file->getFilename()]);
}
}
/**
* Respond to a file that has been moved.
*
* @param \Drupal\file\FileInterface $file
* The updated file entity after the move.
* @param \Drupal\file\FileInterface $source
* The original file entity before the move.
*
* @see file_move()
*/
function hook_file_move(Drupal\file\FileInterface $file, Drupal\file\FileInterface $source) {
// Make sure that the file name starts with the owner's user name.
if (strpos($file->getFilename(), $file->getOwner()->name) !== 0) {
$file->setFilename($file->getOwner()->name . '_' . $file->getFilename());
$file->save();
\Drupal::logger('file')->notice('Moved file %source has been renamed to %destination', ['%source' => $source->filename, '%destination' => $file->getFilename()]);
}
}
/**
* @} End of "addtogroup hooks".
*/