/**
* {@inheritdoc}
*/
public function listen()
{
$this->xmpp->connectAndStartSession($this->timeout);
// Add the message handler
$this->xmpp->addXPathHandler('{jabber:client}message/{http://jabber.org/protocol/pubsub#event}event/{http://superfeedr.com/xmpp-pubsub-ext}status', 'handleMessage', $this);
// Process messages repeatedly
while (!$this->xmpp->isDisconnected()) {
$results = $this->xmpp->processUntil('message', $this->timeout);
if (count($results) === 0) {
$this->logger->warn(sprintf('Superfeedr listener timed out (no messages for %d seconds).', $this->timeout));
throw new Exception\TimeoutException(sprintf('No messages for %d seconds. The connection may have been lost.', $this->timeout));
}
}
}
/**
* Helper function to avoid repetition for subscription and unsubscription.
* @param string $subscribeNode The name of the element describing a
* subscribe or unsubscribe request, e.g. 'subscribe' or 'unsubscribe'.
* @param array $urls The URLs to subscribe/unsubscribe.
* @param bool $digest Whether to set the Superfeedr 'digest' attribute to
* true on the subscription tags.
*/
private function subscribeOrUnsubscribe($subscribeNode, array $urls, $digest)
{
$this->xmpp->connectAndStartSession($this->timeout);
$jid = $this->xmpp->user . '@' . $this->xmpp->server;
$id = $this->xmpp->getId();
// Build up the IQ request
$dom = new \DOMDocument();
$iq = $dom->createElement('iq');
$iq->setAttribute('type', 'set');
$iq->setAttribute('to', $this->recipient);
$iq->setAttribute('from', $jid);
$iq->setAttribute('id', $id);
$iq = $dom->appendChild($iq);
// Create the top-level payload tag
$pubsub = $dom->createElement('pubsub');
$pubsub->setAttribute('xmlns', $this->pubSubXmlns);
$pubsub->setAttribute('xmlns:superfeedr', $this->superfeedrXmlns);
$pubsub = $iq->appendChild($pubsub);
// Add subscription requests
foreach ($urls as $url) {
$subscribe = $dom->createElement($subscribeNode);
$subscribe->setAttribute('node', $url);
$subscribe->setAttribute('jid', $jid);
if ($digest) {
$subscribe->setAttribute('superfeedr:digest', 'true');
}
$pubsub->appendChild($subscribe);
}
$xml = $dom->saveXML($iq);
// Send and wait for a response
$this->xmpp->addIdHandler($id, 'handleResponse', $this);
$this->xmpp->send($xml);
$this->xmpp->processUntil('handle_subscription', $this->timeout);
return $this->isSuccessful();
}