MailingChainTable::copy

static function copy(?int $id): ?int
{
	$dataDb = static::getList(array('filter' => array('ID' => $id)));
	if (!$data = $dataDb->fetch())
	{
		return null;
	}

	$copiedDb = static::add(array(
		'MAILING_ID' => $data['MAILING_ID'],
		'EMAIL_FROM' => $data['EMAIL_FROM'],
		'TITLE' => $data['TITLE'],
		'SUBJECT' => $data['SUBJECT'],
		'MESSAGE' => $data['MESSAGE'],
		'TEMPLATE_TYPE' => $data['TEMPLATE_TYPE'],
		'TEMPLATE_ID' => $data['TEMPLATE_ID'],
		'PRIORITY' => $data['PRIORITY'],
		'LINK_PARAMS' => $data['LINK_PARAMS'],
	));

	if (!$copiedDb->isSuccess())
	{
		return null;
	}
	$copiedId = $copiedDb->getId();

	$attachmentDb = MailingAttachmentTable::getList(array(
		'filter' => array('=CHAIN_ID' => $id)
	));
	while($attachment = $attachmentDb->fetch())
	{
		$copiedFileId = CFile::copyFile($attachment['FILE_ID']);
		if (!$copiedFileId)
		{
			continue;
		}

		MailingAttachmentTable::add(array(
			'CHAIN_ID' => $copiedId,
			'FILE_ID' => $copiedFileId
		));
	}

	return $copiedId;
}