CCalendarSect::getAllSectionsForVendor

static function getAllSectionsForVendor(int $connectionId, array $type)
{
	if (!Loader::includeModule('dav'))
	{
		return [
			'status' => 'error',
			'message' => Loc::getMessage('EC_SYNCAJAX_DAV_REQUIRED'),
		];
	}
	/** @var BitrixCalendarCoreMappersFactory $eventMapper */
	$mapperFactory = BitrixMainDIServiceLocator::getInstance()->get('calendar.service.mappers.factory');
	if ($connection = $mapperFactory->getConnection()->getById($connectionId))
	{
		$userId = CCalendar::GetUserId();

		if ($connection->getOwner()->getId() !== $userId)
		{
			return [];
		}

		return SectionTable::query()
			->setSelect(['*', 'CONNECTION_ID' => 'LINK.CONNECTION_ID'])
			->where('CAL_TYPE', 'user')
			->where('OWNER_ID', $userId)
			->whereIn('EXTERNAL_TYPE', $type)
			->where('CONNECTION_ID', $connectionId)
			->registerRuntimeField(
				new BitrixMainEntityReferenceField(
					'LINK',
					BitrixCalendarInternalsSectionConnectionTable::class,
					['=this.ID' => 'ref.SECTION_ID'],
					['join_type' => 'INNER']
				),
			)->exec()->fetchAll()
		;
	}

	return [];
}