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<?php
/**
* StatusNet, the distributed open-source microblogging tool
*
* Plugin to do "real time" updates using Comet/Bayeux
*
* PHP version 5
*
* LICENCE: 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/>.
*
* @category Plugin
* @package StatusNet
* @author Evan Prodromou <evan@status.net>
* @copyright 2009 StatusNet, Inc.
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
* @link http://status.net/
*/
if (!defined('STATUSNET') && !defined('LACONICA')) {
exit(1);
}
require_once INSTALLDIR.'/plugins/Realtime/RealtimePlugin.php';
/**
* Plugin to do realtime updates using Meteor
*
* @category Plugin
* @package StatusNet
* @author Evan Prodromou <evan@status.net>
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
* @link http://status.net/
*/
class MeteorPlugin extends RealtimePlugin
{
public $webserver = null;
public $webport = null;
public $controlport = null;
public $controlserver = null;
public $channelbase = null;
protected $_socket = null;
function __construct($webserver=null, $webport=4670, $controlport=4671, $controlserver=null, $channelbase='')
{
global $config;
$this->webserver = (empty($webserver)) ? $config['site']['server'] : $webserver;
$this->webport = $webport;
$this->controlport = $controlport;
$this->controlserver = (empty($controlserver)) ? $webserver : $controlserver;
$this->channelbase = $channelbase;
parent::__construct();
}
/**
* Pull settings from config file/database if set.
*/
function initialize()
{
$settings = array('webserver',
'webport',
'controlport',
'controlserver',
'channelbase');
foreach ($settings as $name) {
$val = common_config('meteor', $name);
if ($val !== false) {
$this->$name = $val;
}
}
return parent::initialize();
}
function _getScripts()
{
$scripts = parent::_getScripts();
$scripts[] = 'http://'.$this->webserver.(($this->webport == 80) ? '':':'.$this->webport).'/meteor.js';
$scripts[] = common_path('plugins/Meteor/meteorupdater.js');
return $scripts;
}
function _updateInitialize($timeline, $user_id)
{
$script = parent::_updateInitialize($timeline, $user_id);
return $script." MeteorUpdater.init(\"$this->webserver\", $this->webport, \"{$timeline}\");";
}
function _connect()
{
$controlserver = (empty($this->controlserver)) ? $this->webserver : $this->controlserver;
// May throw an exception.
$this->_socket = stream_socket_client("tcp://{$controlserver}:{$this->controlport}");
if (!$this->_socket) {
throw new Exception("Couldn't connect to {$controlserver} on {$this->controlport}");
}
}
function _publish($channel, $message)
{
$message = json_encode($message);
$message = addslashes($message);
$cmd = "ADDMESSAGE $channel $message\n";
$cnt = fwrite($this->_socket, $cmd);
$result = fgets($this->_socket);
if (preg_match('/^ERR (.*)$/', $result, $matches)) {
throw new Exception('Error adding meteor message "'.$matches[1].'"');
}
// TODO: parse and deal with result
}
function _disconnect()
{
$cnt = fwrite($this->_socket, "QUIT\n");
@fclose($this->_socket);
}
// Meteord flips out with default '/' separator
function _pathToChannel($path)
{
if (!empty($this->channelbase)) {
array_unshift($path, $this->channelbase);
}
return implode('-', $path);
}
}
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