UrlManager::resolvePath

private function resolvePath(Storage $storage, $path, $lookUpFromFolderId, $lastPart = FolderTable::TYPE_FOLDER)
{
	Diag::getInstance()->collectDebugInfo('urlmanager');

	if (!is_string($path))
	{
		return null;
	}

	$path = trim($path, '/');
	$relativeItems = array();
	if ($path === '' && $lastPart == FileTable::TYPE)
	{
		return null;
	}
	elseif ($path === '' && $lastPart === null)
	{
		return array(
			'STORAGE' => $storage,
			'OBJECT_ID' => $lookUpFromFolderId?: $storage->getRootObjectId(),
			'RELATIVE_PATH' => '/',
			'RELATIVE_ITEMS' => $relativeItems,
		);
	}

	if ( ($path === '' || $path === 'index.php') && $lastPart == FolderTable::TYPE)
	{
		//by default we show root folder.
		return array(
			'STORAGE' => $storage,
			'OBJECT_ID' => $storage->getRootObjectId(),
			'RELATIVE_PATH' => '/',
			'RELATIVE_ITEMS' => $relativeItems,
		);
	}

	$filter = array(
		'TYPE' => FolderTable::TYPE_FOLDER,
		'STORAGE_ID' => $storage->getId(),
	);

	if($lookUpFromFolderId !== null)
	{
		$filter['PARENT_ID'] = $lookUpFromFolderId;
	}

	$partsOfPath = explode('/', $path);
	if(end($partsOfPath) == 'index.php' && $lastPart !== FileTable::TYPE)
	{
		array_pop($partsOfPath);
	}
	foreach ($partsOfPath as $i => $pieceOfPath)
	{
		if($i === (count($partsOfPath) - 1))
		{
			if($lastPart !== null)
			{
				$filter['TYPE'] = $lastPart;
			}
			else
			{
				unset($filter['TYPE']);
			}
		}

		$filter['=NAME'] = $pieceOfPath;
		$folder = ObjectTable::getList(array(
			'filter' => $filter,
			'select' => array('ID', 'NAME', 'REAL_OBJECT_ID', 'STORAGE_ID', 'PARENT_ID'),
		))->fetch();

		if(!$folder)
		{
			return null;
		}
		if($folder['REAL_OBJECT_ID'])
		{
			$filter['PARENT_ID'] = $folder['REAL_OBJECT_ID'];
			unset($filter['STORAGE_ID']);
		}
		else
		{
			$filter['PARENT_ID'] = $folder['ID'];
			$filter['STORAGE_ID'] = $folder['STORAGE_ID'];
		}
		$lookUpFromFolderId = $folder['ID'];

		$relativeItems[] = array(
			'ID' => $folder['ID'],
			'NAME' => $pieceOfPath,
		);
	}
	unset($pieceOfPath);

	Diag::getInstance()->logDebugInfo('urlmanager');

	return array(
		'STORAGE' => $storage,
		'OBJECT_ID' => $lookUpFromFolderId,
		'RELATIVE_PATH' => implode('/', $partsOfPath),
		'RELATIVE_ITEMS' => $relativeItems,
	);
}