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<?php
/**
* Laconica, 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 Laconica
* @author Evan Prodromou <evan@controlyourself.ca>
* @copyright 2009 Control Yourself, Inc.
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
* @link http://laconi.ca/
*/
if (!defined('LACONICA')) {
exit(1);
}
/**
* Plugin to do realtime updates using Comet
*
* @category Plugin
* @package Laconica
* @author Evan Prodromou <evan@controlyourself.ca>
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
* @link http://laconi.ca/
*/
class MeteorPlugin extends Plugin
{
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 = $channelbase;
parent::__construct();
}
function onEndShowScripts($action)
{
$timeline = null;
switch ($action->trimmed('action')) {
case 'public':
$timeline = 'timelines-public';
break;
case 'tag':
$tag = $action->trimmed('tag');
if (!empty($tag)) {
$timeline = 'timelines-tag-'.$tag;
} else {
return true;
}
break;
default:
return true;
}
$action->element('script', array('type' => 'text/javascript',
'src' => 'http://'.$this->webserver.(($this->webport == 80) ? '':':'.$this->webport).'/meteor.js'),
' ');
foreach (array('meteorupdater.js', 'json2.js') as $script) {
$action->element('script', array('type' => 'text/javascript',
'src' => common_path('plugins/Meteor/'.$script)),
' ');
}
$user = common_current_user();
if (!empty($user->id)) {
$user_id = $user->id;
} else {
$user_id = 0;
}
$replyurl = common_local_url('newnotice');
$favorurl = common_local_url('favor');
// FIXME: need to find a better way to pass this pattern in
$deleteurl = common_local_url('deletenotice',
array('notice' => '0000000000'));
$action->elementStart('script', array('type' => 'text/javascript'));
$action->raw("$(document).ready(function() { MeteorUpdater.init(\"$this->webserver\", $this->webport, \"{$this->channelbase}{$timeline}\", $user_id, \"$replyurl\", \"$favorurl\", \"$deleteurl\"); });");
$action->elementEnd('script');
return true;
}
function onEndNoticeSave($notice)
{
$timelines = array();
// XXX: Add other timelines; this is just for the public one
if ($notice->is_local ||
($notice->is_local == 0 && !common_config('public', 'localonly'))) {
$timelines[] = 'timelines-public';
}
$tags = $this->getNoticeTags($notice);
if (!empty($tags)) {
foreach ($tags as $tag) {
$timelines[] = 'timelines-tag-' . $tag;
}
}
if (count($timelines) > 0) {
$json = json_encode($this->noticeAsJson($notice));
$this->_connect();
foreach ($timelines as $timeline) {
$this->_addMessage($timeline, $json);
}
$this->_disconnect();
}
return true;
}
protected 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}");
}
}
protected function _addMessage($channel, $message)
{
$message = addslashes($message);
$cmd = "ADDMESSAGE {$this->channelbase}{$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
}
protected function _disconnect()
{
$cnt = fwrite($this->_socket, "QUIT\n");
@fclose($this->_socket);
}
function noticeAsJson($notice)
{
// FIXME: this code should be abstracted to a neutral third
// party, like Notice::asJson(). I'm not sure of the ethics
// of refactoring from within a plugin, so I'm just abusing
// the TwitterApiAction method. Don't do this unless you're me!
require_once(INSTALLDIR.'/lib/twitterapi.php');
$act = new TwitterApiAction('/dev/null');
$arr = $act->twitter_status_array($notice, true);
$arr['url'] = $notice->bestUrl();
$arr['html'] = htmlspecialchars($notice->rendered);
$arr['source'] = htmlspecialchars($arr['source']);
if (!empty($notice->reply_to)) {
$reply_to = Notice::staticGet('id', $notice->reply_to);
if (!empty($reply_to)) {
$arr['in_reply_to_status_url'] = $reply_to->bestUrl();
}
$reply_to = null;
}
$profile = $notice->getProfile();
$arr['user']['profile_url'] = $profile->profileurl;
return $arr;
}
function getNoticeTags($notice)
{
$tags = null;
$nt = new Notice_tag();
$nt->notice_id = $notice->id;
if ($nt->find()) {
$tags = array();
while ($nt->fetch()) {
$tags[] = $nt->tag;
}
}
$nt->free();
$nt = null;
return $tags;
}
// Push this up to Plugin
function log($level, $msg)
{
common_log($level, get_class($this) . ': '.$msg);
}
}
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