Convert group containers to forums if default group forum container is set

Designating a default group forum container is great, because otherwise the system stores each group forum container ID in the serialized system variable "forum_containers". It also does away with the automatically created default forum whether you want one or not.

On sites that are switching to a default forum container, here's a function that takes the old default group forums, renames them to the name of the group container, then deletes the group container. Renaming the forums instead of simply converting containers to forums was necessary to preserve existing forum topics.

<?php
/*
 * Set og forums to new container, rename forum to og container, and delete
 * og container if og forums share container setting
 *
 * @param $vid ID of og forum vocabulary
 * @param $newparent ID of container to put all og forums into
 */
function og_forum_convert_default_forums($vid, $newparent) {
  if (variable_get('forum_default_container_yn', FALSE)) {
    // Get og forums
    $sql = "SELECT td.*, th.parent FROM {term_data} td JOIN {term_hierarchy} th ON td.tid = th.tid WHERE vid=%d";
    $result = db_query($sql, $vid);
    $og_terms = array();
    while ($row = db_fetch_array($result)) {
      $og_terms[] = $row;
    }
    foreach($og_terms as $og_term) {
      // Get forum parent
      if ($og_term['parent'] != 0) {
        $parents = taxonomy_get_parents($og_term['tid']);
        $parent = reset($parents);
        if ($og_term['parent'] != $newparent) {
          $og_term['name'] = $parent->name;
          $og_term['parent'] = $newparent;
          taxonomy_save_term($og_term);
          taxonomy_del_term($parent->tid);
        }
      }
    }
  }
}
?>

I ran this in the Developer code execution box, but it would be better to be able to do this from the og_forums settings page.