public static function buildSifAckMessage($msgId, $timestamp, $originalSourceId, $originalMsgId, $zoneVersion, $versionNamespace, $zoneName)
{
$root = XmlHelper::buildSifMessageBase($zoneVersion, $versionNamespace);
$sifMessage = $root->getElementsByTagName('SIF_Message');
$sifAck = $root->createElement('SIF_Ack');
$sifHeader = $root->createElement('SIF_Header');
$sifHeader->appendChild($root->createElement('SIF_MsgId'))->appendChild($root->createTextNode($msgId));
if ($zoneVersion == '1.5r1') {
$dateTime = explode("T", $timestamp);
$dateTimestamp = $dateTime[0];
$dateTimestamp = str_replace("-", "", $dateTimestamp);
$timeTimestamp = $dateTime[1];
$sifHeader->appendChild($root->createElement('SIF_Date'))->appendChild($root->createTextNode($dateTimestamp));
$sifTimeNode = $root->createElement('SIF_Time');
$timeZone = $root->createAttribute("Zone");
$timeZoneValue = $root->createTextNode("UTC" . date('P'));
$timeZone->appendChild($timeZoneValue);
$sifTimeNode->appendChild($timeZone);
$text = $root->createTextNode($timeTimestamp);
$sifTimeNode->appendChild($text);
$sifHeader->appendChild($sifTimeNode);
} else {
$sifHeader->appendChild($root->createElement('SIF_Timestamp'))->appendChild($root->createTextNode($timestamp));
}
$sifHeader->appendChild($root->createElement('SIF_SourceId'))->appendChild($root->createTextNode($zoneName));
$sifAck->appendChild($sifHeader);
$sifAck->appendChild($root->createElement('SIF_OriginalSourceId'))->appendChild($root->createTextNode($originalSourceId));
$sifAck->appendChild($root->createElement('SIF_OriginalMsgId'))->appendChild($root->createTextNode($originalMsgId));
$sifMessage->item(0)->appendChild($sifAck);
return $root;
}
