CIMHistory::checkFullText

private function checkFullText($searchText)
{
	$indexEnabled = BitrixMainConfigOption::get('im', 'message_history_index');

	if (
		$indexEnabled &&
		CIMMessenger::IsMysqlDb() &&
		BitrixMainSearchContent::canUseFulltextSearch($searchText) &&
		BitrixImModelMessageIndexTable::getEntity()->fullTextIndexEnabled("SEARCH_CONTENT")
	)
	{
		return true;
	}

	return false;
}