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<?php
/*
* Laconica - a distributed open-source microblogging tool
* Copyright (C) 2008, 2009, Control Yourself, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
if (!defined('LACONICA')) { exit(1); }
require_once(INSTALLDIR.'/lib/queuehandler.php');
define('PING_INTERVAL', 120);
/**
* Common superclass for all XMPP-using queue handlers. They all need to
* service their message queues on idle, and forward any incoming messages
* to the XMPP listener connection. So, we abstract out common code to a
* superclass.
*/
class XmppQueueHandler extends QueueHandler
{
var $pingid = 0;
var $lastping = null;
function start()
{
# Low priority; we don't want to receive messages
$this->log(LOG_INFO, "INITIALIZE");
$this->conn = jabber_connect($this->_id.$this->transport());
if (empty($this->conn)) {
$this->log(LOG_ERR, "Couldn't connect to server.");
return false;
}
$this->conn->addEventHandler('message', 'forward_message', $this);
$this->conn->addEventHandler('reconnect', 'handle_reconnect', $this);
$this->conn->setReconnectTimeout(600);
jabber_send_presence("Send me a message to post a notice", 'available', null, 'available', -1);
return !is_null($this->conn);
}
function timeout()
{
return 10;
}
function handle_reconnect(&$pl)
{
$this->log(LOG_NOTICE, 'reconnected');
$this->conn->processUntil('session_start');
$this->conn->presence(null, 'available', null, 'available', -1);
}
function idle($timeout=0)
{
# Process the queue for as long as needed
try {
if ($this->conn) {
$this->log(LOG_DEBUG, "Servicing the XMPP queue.");
$this->conn->processTime($timeout);
$now = time();
if (empty($this->lastping) || $now - $this->lastping > PING_INTERVAL) {
$this->sendPing();
$this->lastping = $now;
}
}
} catch (XMPPHP_Exception $e) {
$this->log(LOG_ERR, "Got an XMPPHP_Exception: " . $e->getMessage());
die($e->getMessage());
}
}
function sendPing()
{
$jid = jabber_daemon_address().'/'.$this->_id.$this->transport();
$server = common_config('xmpp', 'server');
if (!isset($this->pingid)) {
$this->pingid = 0;
} else {
$this->pingid++;
}
$this->log(LOG_DEBUG, "Sending ping #{$this->pingid}");
$this->conn->send("<iq from='{$jid}' to='{$server}' id='ping_{$this->pingid}' type='get'><ping xmlns='urn:xmpp:ping'/></iq>");
}
function forward_message(&$pl)
{
if ($pl['type'] != 'chat') {
$this->log(LOG_DEBUG, 'Ignoring message of type ' . $pl['type'] . ' from ' . $pl['from']);
return;
}
$listener = $this->listener();
if (strtolower($listener) == strtolower($pl['from'])) {
$this->log(LOG_WARNING, 'Ignoring loop message.');
return;
}
$this->log(LOG_INFO, 'Forwarding message from ' . $pl['from'] . ' to ' . $listener);
$this->conn->message($this->listener(), $pl['body'], 'chat', null, $this->ofrom($pl['from']));
}
function ofrom($from)
{
$address = "<addresses xmlns='http://jabber.org/protocol/address'>\n";
$address .= "<address type='ofrom' jid='$from' />\n";
$address .= "</addresses>\n";
return $address;
}
function listener()
{
if (common_config('xmpp', 'listener')) {
return common_config('xmpp', 'listener');
} else {
return jabber_daemon_address() . '/' . common_config('xmpp','resource') . 'daemon';
}
}
function getSockets()
{
return array($this->conn->getSocket());
}
}
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