function xmlsitemap_node_view_access in XML sitemap 7.2

Same name and namespace in other branches

1. 6.2 xmlsitemap_node/xmlsitemap_node.module \xmlsitemap_node_view_access()

Determine whether a user may view the specified node.

Parameters

object $node: The node object on which the operation is to be performed, or node type (e.g. 'forum') for "create" operation.

object $account: Optional, a user object representing the user for whom the operation is to be performed. Determines access for a user other than the current user.

Return value

bool TRUE if the operation may be performed, FALSE otherwise.

This is for all intesive purposes a copy of Drupal 7's node_access() function.

1 call to xmlsitemap_node_view_access()

xmlsitemap_node_create_link in xmlsitemap_node/xmlsitemap_node.module

Create a sitemap link from a node.

File

xmlsitemap_node/xmlsitemap_node.module, line 272

Default file for XML sitemap node.

Code

function xmlsitemap_node_view_access($node, $account = NULL) {
  global $user;
  $op = 'view';
  $rights =& drupal_static(__FUNCTION__, array());
  if (!$node || !in_array($op, array(
    'view',
    'update',
    'delete',
    'create',
  ), TRUE)) {

    // If there was no node to check against, or the $op was not one of the
    // supported ones, we return access denied.
    return FALSE;
  }

  // If no user object is supplied, the access check is for the current user.
  if (empty($account)) {
    $account = $user;
  }

  // $node may be either an object or a node type. Since node types cannot be
  // an integer, use either nid or type as the static cache id.
  // $cid = is_object($node) ? $node->nid : $node;
  // If we've already checked access for this node, user and op, return from
  // cache.
  if (isset($rights[$account->uid][$node->nid])) {
    return $rights[$account->uid][$node->nid];
  }
  if (user_access('bypass node access', $account)) {
    $rights[$account->uid][$node->nid] = TRUE;
    return TRUE;
  }
  if (!user_access('access content', $account)) {
    $rights[$account->uid][$node->nid] = FALSE;
    return FALSE;
  }

  // We grant access to the node if both of the following conditions are met:
  // - No modules say to deny access.
  // - At least one module says to grant access.
  // If no module specified either allow or deny, we fall back to the
  // node_access table.
  $access = module_invoke_all('node_access', $node, $op, $account);
  if (in_array(NODE_ACCESS_DENY, $access, TRUE)) {
    $rights[$account->uid][$node->nid] = FALSE;
    return FALSE;
  }
  elseif (in_array(NODE_ACCESS_ALLOW, $access, TRUE)) {
    $rights[$account->uid][$node->nid] = TRUE;
    return TRUE;
  }

  // Check if authors can view their own unpublished nodes.
  if ($op == 'view' && !$node->status && user_access('view own unpublished content', $account) && $account->uid == $node->uid && $account->uid != 0) {
    $rights[$account->uid][$node->nid] = TRUE;
    return TRUE;
  }

  // If the module did not override the access rights, use those set in the
  // node_access table.
  if ($op != 'create' && $node->nid) {
    if (module_implements('node_grants')) {
      $query = db_select('node_access');
      $query
        ->addExpression('1');
      $query
        ->condition('grant_' . $op, 1, '>=');
      $nids = db_or()
        ->condition('nid', $node->nid);
      if ($node->status) {
        $nids
          ->condition('nid', 0);
      }
      $query
        ->condition($nids);
      $query
        ->range(0, 1);

      // Fetch the node grants and allow other modules to alter them
      // (D7 backport).
      $grants =& drupal_static(__FUNCTION__ . ':grants', array());
      if (!isset($grants[$account->uid][$op])) {

        // Indicate that this is our special function in the grants.
        $account->xmlsitemap_node_access = TRUE;
        $grants[$account->uid][$op] = node_access_grants($op, $account);

        // Remove the special indicator.
        unset($account->xmlsitemap_node_access);
      }
      $grant_condition = db_or();
      foreach ($grants[$account->uid][$op] as $realm => $gids) {
        foreach ($gids as $gid) {
          $grant_condition
            ->condition(db_and()
            ->condition('gid', $gid)
            ->condition('realm', $realm));
        }
      }
      if (count($grant_condition) > 0) {
        $query
          ->condition($grant_condition);
      }
      $result = (bool) $query
        ->execute()
        ->fetchField();
      $rights[$account->uid][$node->nid] = $result;
      return $result;
    }
    elseif (is_object($node) && $op == 'view' && $node->status) {

      // If no modules implement hook_node_grants(), the default behaviour is to
      // allow all users to view published nodes, so reflect that here.
      $rights[$account->uid][$node->nid] = TRUE;
      return TRUE;
    }
  }
  return FALSE;
}