int DownloadManagerImpl::getCurrentRemainTimeByContact(int contactId)
{
    Download *download = getDownloadByContactId(contactId);
    if (download)
        return download->getCurrentRemainTime();

    return -1;
}
int DownloadManagerImpl::getCurrentRemainTimeByDownload(int downloadId)
{
    Download *download = getDownloadByDownloadId(downloadId);
    if (download)
        return download->getCurrentRemainTime();

    return -1;
}