by xjm, pwolanin: Provide API to enable a role.

  taxonomy_access_enable_list();

}

/**

 * Enables access control for a given role.

 *

 * @param int $rid

 *   The role ID.

 */

function taxonomy_access_enable_role($rid) {

  $rid = intval($rid);

  // If we are adding a role, no global default is set yet, so insert it now.

  // All valid role IDs are > 0.

  if ($rid && !taxonomy_access_role_enabled($rid)) {

    // Assemble a $row object for Schema API.

    $row = new stdClass();

    $row->vid = 0;

    $row->rid = $rid;

    // Insert the row with defaults for all grants.

    drupal_write_record('taxonomy_access_default', $row);

  }

}

/**

 * Indicates whether access control is enabled for a given role.

 *

 * @param int $rid

 *   The role ID.

 *

 * @return bool

 *   TRUE if access control is enabled for the role, or FALSE otherwise.

 */

function taxonmy_access_role_enabled($rid) {

  $role_status = &drupal_static(__FUNCTION__, array());

  if (!isset($role_status[$rid])) {

    $role_status[$rid] = (bool) db_query('SELECT 1 FROM {taxonomy_access_default} WHERE rid = :rid AND vid = :vid', array(':rid' => $rid, ':vid' => '0'))->fetchField();

  }

  return $role_status[$rid];

}

/*****************************************************************************/

/*********************** NODE ACCESS UPDATE MECHANISM ************************/