466 lines
14 KiB
PHP
466 lines
14 KiB
PHP
<?php
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/**
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* Laconica, the distributed open-source microblogging tool
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*
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* utility functions for Jabber/GTalk/XMPP messages
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*
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* PHP version 5
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*
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* LICENCE: This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* @category Network
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* @package Laconica
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* @author Evan Prodromou <evan@controlyourself.ca>
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* @copyright 2008 Control Yourself, Inc.
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* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
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* @link http://laconi.ca/
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*/
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if (!defined('LACONICA')) {
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exit(1);
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}
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require_once 'XMPPHP/XMPP.php';
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/**
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* checks whether a string is a syntactically valid Jabber ID (JID)
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*
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* @param string $jid string to check
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*
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* @return boolean whether the string is a valid JID
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*/
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function jabber_valid_base_jid($jid)
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{
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// Cheap but effective
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return Validate::email($jid);
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}
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/**
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* normalizes a Jabber ID for comparison
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*
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* @param string $jid JID to check
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*
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* @return string an equivalent JID in normalized (lowercase) form
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*/
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function jabber_normalize_jid($jid)
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{
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if (preg_match("/(?:([^\@]+)\@)?([^\/]+)(?:\/(.*))?$/", $jid, $matches)) {
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$node = $matches[1];
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$server = $matches[2];
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return strtolower($node.'@'.$server);
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} else {
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return null;
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}
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}
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/**
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* the JID of the Jabber daemon for this Laconica instance
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*
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* @return string JID of the Jabber daemon
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*/
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function jabber_daemon_address()
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{
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return common_config('xmpp', 'user') . '@' . common_config('xmpp', 'server');
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}
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/**
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* connect the configured Jabber account to the configured server
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*
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* @param string $resource Resource to connect (defaults to configured resource)
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*
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* @return XMPPHP connection to the configured server
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*/
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function jabber_connect($resource=null)
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{
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static $conn = null;
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if (!$conn) {
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$conn = new XMPPHP_XMPP(common_config('xmpp', 'host') ?
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common_config('xmpp', 'host') :
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common_config('xmpp', 'server'),
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common_config('xmpp', 'port'),
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common_config('xmpp', 'user'),
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common_config('xmpp', 'password'),
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($resource) ? $resource :
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common_config('xmpp', 'resource'),
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common_config('xmpp', 'server'),
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common_config('xmpp', 'debug') ?
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true : false,
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common_config('xmpp', 'debug') ?
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XMPPHP_Log::LEVEL_VERBOSE : null
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);
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if (!$conn) {
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return false;
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}
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$conn->autoSubscribe();
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$conn->useEncryption(common_config('xmpp', 'encryption'));
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try {
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$conn->connect(true); // true = persistent connection
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} catch (XMPPHP_Exception $e) {
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common_log(LOG_ERROR, $e->getMessage());
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return false;
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}
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$conn->processUntil('session_start');
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}
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return $conn;
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}
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/**
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* send a single notice to a given Jabber address
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*
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* @param string $to JID to send the notice to
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* @param Notice $notice notice to send
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*
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* @return boolean success value
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*/
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function jabber_send_notice($to, $notice)
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{
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$conn = jabber_connect();
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if (!$conn) {
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return false;
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}
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$profile = Profile::staticGet($notice->profile_id);
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if (!$profile) {
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common_log(LOG_WARNING, 'Refusing to send notice with ' .
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'unknown profile ' . common_log_objstring($notice),
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__FILE__);
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return false;
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}
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$msg = jabber_format_notice($profile, $notice);
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$entry = jabber_format_entry($profile, $notice);
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$conn->message($to, $msg, 'chat', null, $entry);
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$profile->free();
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return true;
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}
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/**
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* extra information for XMPP messages, as defined by Twitter
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*
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* @param Profile $profile Profile of the sending user
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* @param Notice $notice Notice being sent
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*
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* @return string Extra information (Atom, HTML, addresses) in string format
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*/
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function jabber_format_entry($profile, $notice)
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{
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// FIXME: notice url might be remote
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$noticeurl = common_local_url('shownotice',
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array('notice' => $notice->id));
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$msg = jabber_format_notice($profile, $notice);
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$self_url = common_local_url('userrss', array('nickname' => $profile->nickname));
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$entry = "\n<entry xmlns='http://www.w3.org/2005/Atom'>\n";
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$entry .= "<source>\n";
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$entry .= "<title>" . $profile->nickname . " - " . common_config('site', 'name') . "</title>\n";
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$entry .= "<link href='" . htmlspecialchars($profile->profileurl) . "'/>\n";
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$entry .= "<link rel='self' type='application/rss+xml' href='" . $self_url . "'/>\n";
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$entry .= "<author><name>" . $profile->nickname . "</name></author>\n";
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$entry .= "<icon>" . common_profile_avatar_url($profile, AVATAR_PROFILE_SIZE) . "</icon>\n";
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$entry .= "</source>\n";
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$entry .= "<title>" . htmlspecialchars($msg) . "</title>\n";
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$entry .= "<summary>" . htmlspecialchars($msg) . "</summary>\n";
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$entry .= "<link rel='alternate' href='" . $noticeurl . "' />\n";
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$entry .= "<id>". $notice->uri . "</id>\n";
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$entry .= "<published>".common_date_w3dtf($notice->created)."</published>\n";
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$entry .= "<updated>".common_date_w3dtf($notice->modified)."</updated>\n";
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$entry .= "</entry>\n";
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$html = "\n<html xmlns='http://jabber.org/protocol/xhtml-im'>\n";
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$html .= "<body xmlns='http://www.w3.org/1999/xhtml'>\n";
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$html .= "<a href='".htmlspecialchars($profile->profileurl)."'>".$profile->nickname."</a>: ";
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$html .= ($notice->rendered) ? $notice->rendered : common_render_content($notice->content, $notice);
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$html .= "\n</body>\n";
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$html .= "\n</html>\n";
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$address = "<addresses xmlns='http://jabber.org/protocol/address'>\n";
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$address .= "<address type='replyto' jid='" . jabber_daemon_address() . "' />\n";
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$address .= "</addresses>\n";
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// FIXME: include a pubsub event, too.
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return $html . $entry . $address;
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}
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/**
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* sends a single text message to a given JID
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*
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* @param string $to JID to send the message to
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* @param string $body body of the message
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* @param string $type type of the message
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* @param string $subject subject of the message
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*
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* @return boolean success flag
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*/
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function jabber_send_message($to, $body, $type='chat', $subject=null)
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{
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$conn = jabber_connect();
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if (!$conn) {
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return false;
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}
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$conn->message($to, $body, $type, $subject);
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return true;
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}
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/**
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* sends a presence stanza on the Jabber network
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*
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* @param string $status current status, free-form string
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* @param string $show structured status value
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* @param string $to recipient of presence, null for general
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* @param string $type type of status message, related to $show
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* @param int $priority priority of the presence
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*
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* @return boolean success value
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*/
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function jabber_send_presence($status, $show='available', $to=null,
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$type = 'available', $priority=null)
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{
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$conn = jabber_connect();
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if (!$conn) {
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return false;
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}
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$conn->presence($status, $show, $to, $type, $priority);
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return true;
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}
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/**
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* sends a confirmation request to a JID
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*
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* @param string $code confirmation code for confirmation URL
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* @param string $nickname nickname of confirming user
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* @param string $address JID to send confirmation to
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*
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* @return boolean success flag
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*/
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function jabber_confirm_address($code, $nickname, $address)
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{
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$body = 'User "' . $nickname . '" on ' . common_config('site', 'name') . ' ' .
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'has said that your Jabber ID belongs to them. ' .
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'If that\'s true, you can confirm by clicking on this URL: ' .
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common_local_url('confirmaddress', array('code' => $code)) .
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' . (If you cannot click it, copy-and-paste it into the ' .
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'address bar of your browser). If that user isn\'t you, ' .
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'or if you didn\'t request this confirmation, just ignore this message.';
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return jabber_send_message($address, $body);
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}
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/**
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* sends a "special" presence stanza on the Jabber network
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*
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* @param string $type Type of presence
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* @param string $to JID to send presence to
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* @param string $show show value for presence
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* @param string $status status value for presence
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*
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* @return boolean success flag
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*
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* @see jabber_send_presence()
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*/
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function jabber_special_presence($type, $to=null, $show=null, $status=null)
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{
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// FIXME: why use this instead of jabber_send_presence()?
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$conn = jabber_connect();
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$to = htmlspecialchars($to);
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$status = htmlspecialchars($status);
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$out = "<presence";
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if ($to) {
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$out .= " to='$to'";
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}
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if ($type) {
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$out .= " type='$type'";
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}
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if ($show == 'available' and !$status) {
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$out .= "/>";
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} else {
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$out .= ">";
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if ($show && ($show != 'available')) {
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$out .= "<show>$show</show>";
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}
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if ($status) {
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$out .= "<status>$status</status>";
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}
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$out .= "</presence>";
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}
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$conn->send($out);
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}
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/**
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* broadcast a notice to all subscribers and reply recipients
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*
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* This function will send a notice to all subscribers on the local server
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* who have Jabber addresses, and have Jabber notification enabled, and
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* have this subscription enabled for Jabber. It also sends the notice to
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* all recipients of @-replies who have Jabber addresses and Jabber notification
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* enabled. This is really the heart of Jabber distribution in Laconica.
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*
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* @param Notice $notice The notice to broadcast
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*
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* @return boolean success flag
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*/
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function jabber_broadcast_notice($notice)
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{
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if (!common_config('xmpp', 'enabled')) {
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return true;
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}
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$profile = Profile::staticGet($notice->profile_id);
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if (!$profile) {
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common_log(LOG_WARNING, 'Refusing to broadcast notice with ' .
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'unknown profile ' . common_log_objstring($notice),
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__FILE__);
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return false;
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}
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$msg = jabber_format_notice($profile, $notice);
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$entry = jabber_format_entry($profile, $notice);
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$profile->free();
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unset($profile);
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$sent_to = array();
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$conn = jabber_connect();
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// First, get users to whom this is a direct reply
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$user = new User();
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$user->query('SELECT user.id, user.jabber ' .
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'FROM user JOIN reply ON user.id = reply.profile_id ' .
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'WHERE reply.notice_id = ' . $notice->id . ' ' .
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'AND user.jabber is not null ' .
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'AND user.jabbernotify = 1 ' .
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'AND user.jabberreplies = 1 ');
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while ($user->fetch()) {
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common_log(LOG_INFO,
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'Sending reply notice ' . $notice->id . ' to ' . $user->jabber,
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__FILE__);
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$conn->message($user->jabber, $msg, 'chat', null, $entry);
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$conn->processTime(0);
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$sent_to[$user->id] = 1;
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}
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$user->free();
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// Now, get users subscribed to this profile
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$user = new User();
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$user->query('SELECT user.id, user.jabber ' .
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'FROM user JOIN subscription ' .
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'ON user.id = subscription.subscriber ' .
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'WHERE subscription.subscribed = ' . $notice->profile_id . ' ' .
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'AND user.jabber is not null ' .
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'AND user.jabbernotify = 1 ' .
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'AND subscription.jabber = 1 ');
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while ($user->fetch()) {
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if (!array_key_exists($user->id, $sent_to)) {
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common_log(LOG_INFO,
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'Sending notice ' . $notice->id . ' to ' . $user->jabber,
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__FILE__);
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$conn->message($user->jabber, $msg, 'chat', null, $entry);
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// To keep the incoming queue from filling up,
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// we service it after each send.
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$conn->processTime(0);
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}
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}
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$user->free();
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return true;
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}
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/**
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* send a notice to all public listeners
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*
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* For notices that are generated on the local system (by users), we can optionally
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* forward them to remote listeners by XMPP.
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*
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* @param Notice $notice notice to broadcast
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*
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* @return boolean success flag
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*/
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function jabber_public_notice($notice)
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{
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// Now, users who want everything
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$public = common_config('xmpp', 'public');
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// FIXME PRIV don't send out private messages here
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// XXX: should we send out non-local messages if public,localonly
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// = false? I think not
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if ($public && $notice->is_local) {
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$profile = Profile::staticGet($notice->profile_id);
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if (!$profile) {
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common_log(LOG_WARNING, 'Refusing to broadcast notice with ' .
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'unknown profile ' . common_log_objstring($notice),
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__FILE__);
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return false;
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}
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$msg = jabber_format_notice($profile, $notice);
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$entry = jabber_format_entry($profile, $notice);
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$conn = jabber_connect();
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foreach ($public as $address) {
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common_log(LOG_INFO,
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'Sending notice ' . $notice->id .
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' to public listener ' . $address,
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__FILE__);
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$conn->message($address, $msg, 'chat', null, $entry);
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$conn->processTime(0);
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}
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$profile->free();
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}
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return true;
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}
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/**
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* makes a plain-text formatted version of a notice, suitable for Jabber distribution
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*
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* @param Profile &$profile profile of the sending user
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* @param Notice &$notice notice being sent
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*
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* @return string plain-text version of the notice, with user nickname prefixed
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*/
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function jabber_format_notice(&$profile, &$notice)
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{
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return $profile->nickname . ': ' . $notice->content;
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}
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