ReadService::getLastIdByChatId

public function getLastIdByChatId(int $chatId): int
{
	$relation = RelationTable::query()
		->setSelect(['LAST_ID'])
		->where('USER_ID', $this->getContext()->getUserId())
		->where('CHAT_ID', $chatId)->setLimit(1)
		->fetch();

	if ($relation)
	{
		return $relation['LAST_ID'] ?? 0;
	}

	return 0;
}