FileAccessControlHandler.php in Zircon Profile 8
Same filename and directory in other branches
Contains \Drupal\file\FileAccessControlHandler.
Namespace
Drupal\fileFile
core/modules/file/src/FileAccessControlHandler.phpView source
<?php
/**
* @file
* Contains \Drupal\file\FileAccessControlHandler.
*/
namespace Drupal\file;
use Drupal\Core\Access\AccessResult;
use Drupal\Core\Entity\EntityAccessControlHandler;
use Drupal\Core\Entity\EntityInterface;
use Drupal\Core\Entity\EntityStorageInterface;
use Drupal\Core\Session\AccountInterface;
/**
* Provides a File access control handler.
*/
class FileAccessControlHandler extends EntityAccessControlHandler {
/**
* {@inheritdoc}
*/
protected function checkAccess(EntityInterface $entity, $operation, AccountInterface $account) {
/** @var \Drupal\file\FileInterface $entity */
if ($operation == 'download' || $operation == 'view') {
if (\Drupal::service('file_system')
->uriScheme($entity
->getFileUri()) === 'public') {
// Always allow access to file in public file system.
return AccessResult::allowed();
}
elseif ($references = $this
->getFileReferences($entity)) {
foreach ($references as $field_name => $entity_map) {
foreach ($entity_map as $referencing_entity_type => $referencing_entities) {
/** @var \Drupal\Core\Entity\EntityInterface $referencing_entity */
foreach ($referencing_entities as $referencing_entity) {
$entity_and_field_access = $referencing_entity
->access('view', $account, TRUE)
->andIf($referencing_entity->{$field_name}
->access('view', $account, TRUE));
if ($entity_and_field_access
->isAllowed()) {
return $entity_and_field_access;
}
}
}
}
}
elseif ($entity
->getOwnerId() == $account
->id()) {
// This case handles new nodes, or detached files. The user who uploaded
// the file can always access if it's not yet used.
return AccessResult::allowed();
}
}
// No opinion.
return AccessResult::neutral();
}
/**
* Wrapper for file_get_file_references().
*
* @param \Drupal\file\FileInterface $file
* The file object for which to get references.
*
* @return array
* A multidimensional array. The keys are field_name, entity_type,
* entity_id and the value is an entity referencing this file.
*
* @see file_get_file_references()
*/
protected function getFileReferences(FileInterface $file) {
return file_get_file_references($file, NULL, EntityStorageInterface::FIELD_LOAD_REVISION, NULL);
}
}
Classes
Name | Description |
---|---|
FileAccessControlHandler | Provides a File access control handler. |