ViewedService::getLastMessageIdInChat

public function getLastMessageIdInChat(int $chatId): ?int
{
	$result = MessageTable::query()
		->setSelect(['ID'])
		->where('CHAT_ID', $chatId)
		->setOrder(['DATE_CREATE' => 'DESC'])
		->setLimit(1)
		->fetch()
	;

	return $result ? (int)$result['ID'] : null;
}