Department::getIBlockSections

static function getIBlockSections(array $select = array())
{
	$result = array("SECTIONS" => array(), "STRUCTURE" => array());

	if(!static::includeModule() || !Loader::includeModule('iblock') || !empty($ids))
	{
		return $result;
	}

	$iblockId = intval(COption::getOptionInt('intranet', 'iblock_structure'));
	if(!$iblockId)
	{
		return $result;
	}

	$filter = array('IBLOCK_ID' => $iblockId);
	$select = array_merge($select, array('ID', 'NAME', 'IBLOCK_SECTION_ID', 'DEPTH_LEVEL', 'LEFT_MARGIN', 'RIGHT_MARGIN'));

	$cache = new CPHPCache();
	$cacheDir = '/tasks/subordinatedeps';

	$structure = array();
	$sections = array();

	if($cache->initCache(32100113, md5(serialize($filter)), $cacheDir))
	{
		$vars = $cache->getVars();
		$sections = $vars["SECTIONS"];
		$structure = $vars["STRUCTURE"];
	}
	elseif ($cache->startDataCache())
	{
		global $CACHE_MANAGER;
		$CACHE_MANAGER->startTagCache($cacheDir);
		$CACHE_MANAGER->registerTag("iblock_id_{$iblockId}");

		$res = CIBlockSection::getList(
			['left_margin' => 'asc'], // order as full expanded tree
			$filter,
			false, // don't count
			$select
		);
		while ($item = $res->fetch())
		{
			$id = $item['ID'];
			$iblockSectionID = (int)$item['IBLOCK_SECTION_ID'];

			if (!isset($structure[$iblockSectionID]))
			{
				$structure[$iblockSectionID] = [];
			}
			$structure[$iblockSectionID][] = $id;

			$sections[$id] = $item;
		}
		$CACHE_MANAGER->endTagCache();
		$cache->endDataCache(array("SECTIONS" => $sections, "STRUCTURE" => $structure));
	}

	$result['SECTIONS'] = $sections;
	$result['STRUCTURE'] = $structure;

	return $result;
}