public function processUnregistration()
{
$dom = $this->xmlDom;
$headerNode = $dom->getElementsByTagName('SIF_Header')->item(0);
$originalMsgId = $headerNode->getElementsByTagName('SIF_MsgId')->item(0)->nodeValue;
$originalSourceId = $headerNode->getElementsByTagName('SIF_SourceId')->item(0)->nodeValue;
$originalTimestamp = $headerNode->getElementsByTagName('SIF_Timestamp')->item(0)->nodeValue;
$validSourceId = Agent::checkSourceId($originalSourceId);
if (!$validSourceId) {
RegisterError::invalidSourceId($agent->sourceId, $originalMsgId);
} else {
$agent = new Agent($originalSourceId);
if ($agent->isRegistered()) {
if ($agent->unRegister()) {
XmlHelper::buildSuccessMessage(Utility::createMessageId(), Utility::createTimestamp(), $agent->sourceId, $originalMsgId, 0);
} else {
RegisterError::genericError($agent->sourceId, $originalMsgId);
}
} else {
RegisterError::notRegisteredError($originalSourceId, $originalMsgId);
}
}
}
