[*parentparent*] ??

<?php
/**
 * @name ParentParent
 * @version 0.1
 * @author Cipa
 * 
 * @param &id The id of the document whose parent you want to find.
 * @param &extraLevels Adds extra levels to the search.
 * 
 * @license Public Domain, use as you like.
 * 
 * @example [[ParentParent]] 
 * Will return the id of the parent of the parent for the current document
 *
 * @example [[ParentParent? &id=`30`]] 
 * Will return the id of the parent of the parent for document 30
 *
 * @example [[ParentParent? &id=`30` &extraLevels=`1`]] 
 * Will return the id of the parent of the parent of the parent for document 30
 * 
 * This snippet travels up the document tree from a specified document and
 * returns the parent id of the parent. To add an extra level to the search 
 * use the &extraLevels param.
 * To be used with a least 3 levels of documents. If less the parent id or the document id will be returned
 * 
 * Usage with wayfinder(note the [! !])
 * [!Wayfinder? &startId=`[[ParentParent]]`!]
 * [!Wayfinder? &startId=`[[ParentParent? &extraLevels=`1`]]`!]
 *
 * Inspired by UltimateParent
 */

$id = isset ($id) && intval($id) ? intval($id) : $modx->documentIdentifier;
$extraLevels = isset ($extraLevels) && intval($extraLevels) ? $extraLevels : 0;
$levels = 2 + $extraLevels; //the default start level is 2 which corresponds to the parent of the parent

$parentsIds = array_values($modx->getParentIds($id)); //get parents and make numeric keys
$parentsIdsNo = count($parentsIds);

if(array_key_exists($levels-1, $parentsIds)){
	return $parentsIds[$levels-1];
}elseif($parentsIdsNo){
	return array_pop($parentsIds);
}

return $id;

?>

<?php
$parentparent = $modx->runSnippet("ParentParent");
$wayfinderOutput = $modx->runSnippet("Wayfinder", array('startId' => $parentparent));

return $wayfinderOutput;
?>