_node_access_rebuild_batch_operation

_node_access_rebuild_batch_operation(&$context)

function _node_access_rebuild_batch_operation(&$context) {
  $node_storage = \Drupal::entityManager()->getStorage('node');
  if (empty($context['sandbox'])) {
    // Initiate multistep processing.
    $context['sandbox']['progress'] = 0;
    $context['sandbox']['current_node'] = 0;
    $context['sandbox']['max'] = \Drupal::entityQuery('node')->accessCheck(FALSE)->count()->execute();
  }

  // Process the next 20 nodes.
  $limit = 20;
  $nids = \Drupal::entityQuery('node')
    ->condition('nid', $context['sandbox']['current_node'], '>')
    ->sort('nid', 'ASC')
    // Disable access checking since all nodes must be processed even if the
    // user does not have access. And unless the current user has the bypass
    // node access permission, no nodes are accessible since the grants have
    // just been deleted.
    ->accessCheck(FALSE)
    ->range(0, $limit)
    ->execute();
  $node_storage->resetCache($nids);
  $nodes = Node::loadMultiple($nids);
  foreach ($nodes as $nid => $node) {
    // To preserve database integrity, only write grants if the node
    // loads successfully.
    if (!empty($node)) {
      /** @var \Drupal\node\NodeAccessControlHandlerInterface $access_control_handler */
      $access_control_handler = \Drupal::entityManager()->getAccessControlHandler('node');
      $grants = $access_control_handler->acquireGrants($node);
      \Drupal::service('node.grant_storage')->write($node, $grants);
    }
    $context['sandbox']['progress']++;
    $context['sandbox']['current_node'] = $nid;
  }

  // Multistep processing : report progress.
  if ($context['sandbox']['progress'] != $context['sandbox']['max']) {
    $context['finished'] = $context['sandbox']['progress'] / $context['sandbox']['max'];
  }
}