Nekonečně hluboké zanoření - routy

whatever.php

<?php
$catFilterIn = function($slug, $params, $origParams) use($site) {
	if(!isset($site->languages[$params['lang']]))
		return NULL;
	
	$lang = $site->languages[$params['lang']];
	$temp = explode('/', trim($slug, '/'));
	$path = array();
	$slugs = array();

	$result = Category::findAll()
		->where('[slug] IN %l', $temp)
			->and('[language] = %i', $lang->id)
		->orderBy('[lft]')
			->fetchAll();

	// Ensure that no other categories with same slug as any child category are selected before the root level category
	reset($result);
	while(list($key, $val) = each($result)) {
		if($temp[0] !== $val->slug) {
			unset($result[$key]);
			continue;
		}

		break;
	}

	// Limit the array to only count($temp) elements - no other will be needed
	$result = array_slice($result, 0, count($temp));

	foreach($result as $val) {
		$slugs[$val->slug] = $val;
	}

	foreach($temp as $part) {
		// Match found
		if(isset($slugs[$part])) {
			$part2 = $slugs[$part];
			if($part2->parent_id === Category::ROOT) {
				$path[] = $part2;
			}
			else {
				$lastPart = end($path);
				if($part2->parent_id === $lastPart->id) {
					$path[] = $part2;
				}
			}
		} else {
			return NULL;
		}
	}

	return end($path)->id;
};

$catFilterOut = function($id, $params, $origParams) {
	$ch = Avalon\Tools::getSiteCache();
	if(!isset($ch[Category::CACHE_KEY_ALL])) {
		$cache = Category::fillCache();
	} else {
		$cache = $ch[Category::CACHE_KEY_ALL];
	}
	

	if($id === Category::ROOT) { // ROOT - no linking
		return NULL;
	}

	$curId = $id;
	$return = '';
	do {
		if(!isset($cache[$curId])) {
			return NULL;
		}

		$return = $cache[$curId]->slug . '/' . $return;

		if($cache[$curId]->parent_id === Category::ROOT) // ROOT ID
			break;

		$curId = $cache[$curId]->parent_id;
	}
	while(TRUE);

	$return = trim($return, '/');
	return $return;
};