ImportService::fillChatActualData

private function fillChatActualData(): void
{
	$lastMessageIds = $this->getLastMessageIds((int)$this->chat['ID']);
	$this->chat['MESSAGE_COUNT'] = $this->getMessageCount((int)$this->chat['ID']);
	$this->chat['LAST_MESSAGE_ID'] = $lastMessageIds[0] ?? 0;
	$this->chat['PREV_MESSAGE_ID'] = $lastMessageIds[1] ?? 0;
}