GoogleDublicatesCleaner::doCheckAndClean

static function doCheckAndClean()
{
	global $DB;

	$query = $DB->Query("select GAPI_CALENDAR_ID, CAL_DAV_CON, COUNT(1) AS CNT from b_calendar_section where CAL_DAV_CON > 0 and GAPI_CALENDAR_ID <>
'' group by CAL_DAV_CON, GAPI_CALENDAR_ID ORDER BY CNT DESC");

	$gapiList = array();
	$gapi = '';

	while($row = $query->Fetch())
	{
		if($row['CNT'] > 1 && $row['GAPI_CALENDAR_ID'])
		{
			$gapi = $row['GAPI_CALENDAR_ID'];
			$gapiList[] = $row['GAPI_CALENDAR_ID'];
			break;
		}
	}

	if($gapi)
	{
		$query = $DB->Query("select ID, CAL_DAV_CON, GAPI_CALENDAR_ID from b_calendar_section where GAPI_CALENDAR_ID='".$DB->ForSql($gapi)."' order by ID desc limit 20");

		$sectionIndex = array();
		while($section = $query->Fetch())
		{
			$key = $section['GAPI_CALENDAR_ID'].'|'.$section['CAL_DAV_CON'];
			if(!isset($sectionIndex[$key]))
			{
				$sectionIndex[$key] = true;
			}
			else
			{
				if (BitrixMainModuleManager::isModuleInstalled('bitrix24') || COption::GetOptionString('calendar', 'sync_by_push', false))
				{
					BitrixCalendarPushTable::delete(array('ENTITY_TYPE' => 'SECTION', 'ENTITY_ID' => $section["ID"]));
				}

				$DB->Query("DELETE FROM b_calendar_event_sect WHERE SECT_ID=".intval($section["ID"]), false, "FILE: ".__FILE__."
 LINE: ".__LINE__);
				$DB->Query("DELETE FROM b_calendar_section WHERE ID=".intval($section["ID"]), false, "FILE: ".__FILE__."
 LINE: ".__LINE__);

				CCalendarEvent::DeleteEmpty();
				CCalendarSect::CleanAccessTable();
			}
		}
		return "Bitrix\Calendar\Update\GoogleDublicatesCleaner::doCheckAndClean();";
	}

	if(empty($gapiList))
	{
		CCalendarEvent::DeleteEmpty();
		CCalendarSect::CleanAccessTable();
		return '';
	}
}