Drupal 8.0.0 beta 12. More info: https://www.drupal.org/node/2514176

core/modules/node/src/NodeAccessControlHandler.php

@@ -0,0 +1,202 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\node\NodeAccessControlHandler.
+ */
+
+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\Language\LanguageInterface;
+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, $langcode = LanguageInterface::LANGCODE_DEFAULT, 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()->cachePerPermissions();
+      return $return_as_object ? $result : $result->isAllowed();
+    }
+    $result = parent::access($entity, $operation, $langcode, $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, $langcode, AccountInterface $account) {
+    /** @var \Drupal\node\NodeInterface $node */
+    /** @var \Drupal\node\NodeInterface $translation */
+    $translation = $node->getTranslation($langcode);
+    // Fetch information from the node object if possible.
+    $status = $translation->isPublished();
+    $uid = $translation->getOwnerId();
+
+    // Check if authors can view their own unpublished nodes.
+    if ($operation === 'view' && !$status && $account->hasPermission('view own unpublished content') && $account->isAuthenticated() && $account->id() == $uid) {
+      return AccessResult::allowed()->cachePerPermissions()->cachePerUser()->cacheUntilEntityChanges($node);
+    }
+
+    // Evaluate node grants.
+    return $this->grantStorage->access($node, $operation, $langcode, $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);
+  }
+
+}