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<?php
namespace Drupal\node;
use Drupal\Core\Access\AccessResult;
use Drupal\Core\Entity\EntityHandlerInterface;
use Drupal\Core\Entity\EntityTypeInterface;
use Drupal\Core\Field\FieldDefinitionInterface;
use Drupal\Core\Field\FieldItemListInterface;
use Drupal\Core\Entity\EntityAccessControlHandler;
use Drupal\Core\Entity\EntityInterface;
use Drupal\Core\Session\AccountInterface;
use Symfony\Component\DependencyInjection\ContainerInterface;
/**
* Defines the access control handler for the node entity type.
*
* @see \Drupal\node\Entity\Node
* @ingroup node_access
*/
class NodeAccessControlHandler extends EntityAccessControlHandler implements NodeAccessControlHandlerInterface, EntityHandlerInterface {
/**
* The node grant storage.
*
* @var \Drupal\node\NodeGrantDatabaseStorageInterface
*/
protected $grantStorage;
/**
* Constructs a NodeAccessControlHandler object.
*
* @param \Drupal\Core\Entity\EntityTypeInterface $entity_type
* The entity type definition.
* @param \Drupal\node\NodeGrantDatabaseStorageInterface $grant_storage
* The node grant storage.
*/
public function __construct(EntityTypeInterface $entity_type, NodeGrantDatabaseStorageInterface $grant_storage) {
parent::__construct($entity_type);
$this->grantStorage = $grant_storage;
}
/**
* {@inheritdoc}
*/
public static function createInstance(ContainerInterface $container, EntityTypeInterface $entity_type) {
return new static(
$entity_type,
$container->get('node.grant_storage')
);
}
/**
* {@inheritdoc}
*/
public function access(EntityInterface $entity, $operation, AccountInterface $account = NULL, $return_as_object = FALSE) {
$account = $this->prepareUser($account);
if ($account->hasPermission('bypass node access')) {
$result = AccessResult::allowed()->cachePerPermissions();
return $return_as_object ? $result : $result->isAllowed();
}
if (!$account->hasPermission('access content')) {
$result = AccessResult::forbidden("The 'access content' permission is required.")->cachePerPermissions();
return $return_as_object ? $result : $result->isAllowed();
}
$result = parent::access($entity, $operation, $account, TRUE)->cachePerPermissions();
return $return_as_object ? $result : $result->isAllowed();
}
/**
* {@inheritdoc}
*/
public function createAccess($entity_bundle = NULL, AccountInterface $account = NULL, array $context = array(), $return_as_object = FALSE) {
$account = $this->prepareUser($account);
if ($account->hasPermission('bypass node access')) {
$result = AccessResult::allowed()->cachePerPermissions();
return $return_as_object ? $result : $result->isAllowed();
}
if (!$account->hasPermission('access content')) {
$result = AccessResult::forbidden()->cachePerPermissions();
return $return_as_object ? $result : $result->isAllowed();
}
$result = parent::createAccess($entity_bundle, $account, $context, TRUE)->cachePerPermissions();
return $return_as_object ? $result : $result->isAllowed();
}
/**
* {@inheritdoc}
*/
protected function checkAccess(EntityInterface $node, $operation, AccountInterface $account) {
/** @var \Drupal\node\NodeInterface $node */
// Fetch information from the node object if possible.
$status = $node->isPublished();
$uid = $node->getOwnerId();
// Check if authors can view their own unpublished nodes.
if ($operation === 'view' && !$status && $account->hasPermission('view own unpublished content') && $account->isAuthenticated() && $account->id() == $uid) {
return AccessResult::allowed()->cachePerPermissions()->cachePerUser()->addCacheableDependency($node);
}
// Evaluate node grants.
return $this->grantStorage->access($node, $operation, $account);
}
/**
* {@inheritdoc}
*/
protected function checkCreateAccess(AccountInterface $account, array $context, $entity_bundle = NULL) {
return AccessResult::allowedIf($account->hasPermission('create ' . $entity_bundle . ' content'))->cachePerPermissions();
}
/**
* {@inheritdoc}
*/
protected function checkFieldAccess($operation, FieldDefinitionInterface $field_definition, AccountInterface $account, FieldItemListInterface $items = NULL) {
// Only users with the administer nodes permission can edit administrative
// fields.
$administrative_fields = array('uid', 'status', 'created', 'promote', 'sticky');
if ($operation == 'edit' && in_array($field_definition->getName(), $administrative_fields, TRUE)) {
return AccessResult::allowedIfHasPermission($account, 'administer nodes');
}
// No user can change read only fields.
$read_only_fields = array('revision_timestamp', 'revision_uid');
if ($operation == 'edit' && in_array($field_definition->getName(), $read_only_fields, TRUE)) {
return AccessResult::forbidden();
}
// Users have access to the revision_log field either if they have
// administrative permissions or if the new revision option is enabled.
if ($operation == 'edit' && $field_definition->getName() == 'revision_log') {
if ($account->hasPermission('administer nodes')) {
return AccessResult::allowed()->cachePerPermissions();
}
return AccessResult::allowedIf($items->getEntity()->type->entity->isNewRevision())->cachePerPermissions();
}
return parent::checkFieldAccess($operation, $field_definition, $account, $items);
}
/**
* {@inheritdoc}
*/
public function acquireGrants(NodeInterface $node) {
$grants = $this->moduleHandler->invokeAll('node_access_records', array($node));
// Let modules alter the grants.
$this->moduleHandler->alter('node_access_records', $grants, $node);
// If no grants are set and the node is published, then use the default grant.
if (empty($grants) && $node->isPublished()) {
$grants[] = array('realm' => 'all', 'gid' => 0, 'grant_view' => 1, 'grant_update' => 0, 'grant_delete' => 0);
}
return $grants;
}
/**
* {@inheritdoc}
*/
public function writeGrants(NodeInterface $node, $delete = TRUE) {
$grants = $this->acquireGrants($node);
$this->grantStorage->write($node, $grants, NULL, $delete);
}
/**
* {@inheritdoc}
*/
public function writeDefaultGrant() {
$this->grantStorage->writeDefault();
}
/**
* {@inheritdoc}
*/
public function deleteGrants() {
$this->grantStorage->delete();
}
/**
* {@inheritdoc}
*/
public function countGrants() {
return $this->grantStorage->count();
}
/**
* {@inheritdoc}
*/
public function checkAllGrants(AccountInterface $account) {
return $this->grantStorage->checkAll($account);
}
}
|
