function taxonomy_access_query_term_access_alter in Taxonomy Access Control 7

Implements hook_query_TAG_alter() for 'term_access'.

Provides sitewide list grant filtering, as well as create grant filtering for autocomplete paths.

@todo Fix create permission filtering for autocomplete paths.

Related topics

File

./taxonomy_access.module, line 312

Allows administrators to specify access control for taxonomy categories.

Code

function taxonomy_access_query_term_access_alter($query) {

  // Take no action while the list op is disabled.
  if (!taxonomy_access_list_enabled()) {
    return;
  }

  // Take no action if there is no term table in the query.
  $alias = '';
  $tables =& $query
    ->getTables();
  foreach ($tables as $i => $table) {
    if (strpos($table['table'], 'taxonomy_term_') === 0) {
      $alias = $table['alias'];
    }
  }
  if (empty($alias)) {
    return;
  }

  // Fetch a list of all terms the user may list.
  $tids =& drupal_static(__FUNCTION__, taxonomy_access_user_list_terms());

  // If exactly TRUE was returned, the user can list all terms.
  if ($tids === TRUE) {
    return;
  }

  // If the user cannot list any terms, then allow only null values.
  if (empty($tids)) {
    $query
      ->isNull($alias . ".tid");
  }
  else {
    $query
      ->condition($alias . ".tid", $tids, "IN");
  }
}