gnu-social/lib/jabber.php

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<?php
/**
* Laconica, the distributed open-source microblogging tool
*
* utility functions for Jabber/GTalk/XMPP messages
*
* 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 Network
* @package Laconica
* @author Evan Prodromou <evan@controlyourself.ca>
* @copyright 2008 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);
}
require_once 'XMPPHP/XMPP.php';
/**
* checks whether a string is a syntactically valid Jabber ID (JID)
*
* @param string $jid string to check
*
* @return boolean whether the string is a valid JID
*/
function jabber_valid_base_jid($jid)
{
// Cheap but effective
return Validate::email($jid);
}
/**
* normalizes a Jabber ID for comparison
*
* @param string $jid JID to check
*
* @return string an equivalent JID in normalized (lowercase) form
*/
function jabber_normalize_jid($jid)
{
if (preg_match("/(?:([^\@]+)\@)?([^\/]+)(?:\/(.*))?$/", $jid, $matches)) {
$node = $matches[1];
$server = $matches[2];
return strtolower($node.'@'.$server);
} else {
return null;
}
}
/**
* the JID of the Jabber daemon for this Laconica instance
*
* @return string JID of the Jabber daemon
*/
function jabber_daemon_address()
{
return common_config('xmpp', 'user') . '@' . common_config('xmpp', 'server');
}
/**
* connect the configured Jabber account to the configured server
*
* @param string $resource Resource to connect (defaults to configured resource)
*
* @return XMPPHP connection to the configured server
*/
function jabber_connect($resource=null)
{
static $conn = null;
if (!$conn) {
$conn = new XMPPHP_XMPP(common_config('xmpp', 'host') ?
common_config('xmpp', 'host') :
common_config('xmpp', 'server'),
common_config('xmpp', 'port'),
common_config('xmpp', 'user'),
common_config('xmpp', 'password'),
($resource) ? $resource :
common_config('xmpp', 'resource'),
common_config('xmpp', 'server'),
common_config('xmpp', 'debug') ?
true : false,
common_config('xmpp', 'debug') ?
XMPPHP_Log::LEVEL_VERBOSE : null
);
if (!$conn) {
return false;
}
$conn->autoSubscribe();
$conn->useEncryption(common_config('xmpp', 'encryption'));
try {
$conn->connect(true); // true = persistent connection
} catch (XMPPHP_Exception $e) {
common_log(LOG_ERR, $e->getMessage());
return false;
}
$conn->processUntil('session_start');
}
return $conn;
}
/**
* send a single notice to a given Jabber address
*
* @param string $to JID to send the notice to
* @param Notice $notice notice to send
*
* @return boolean success value
*/
function jabber_send_notice($to, $notice)
{
$conn = jabber_connect();
if (!$conn) {
return false;
}
$profile = Profile::staticGet($notice->profile_id);
if (!$profile) {
common_log(LOG_WARNING, 'Refusing to send notice with ' .
'unknown profile ' . common_log_objstring($notice),
__FILE__);
return false;
}
$msg = jabber_format_notice($profile, $notice);
$entry = jabber_format_entry($profile, $notice);
$conn->message($to, $msg, 'chat', null, $entry);
$profile->free();
return true;
}
/**
* extra information for XMPP messages, as defined by Twitter
*
* @param Profile $profile Profile of the sending user
* @param Notice $notice Notice being sent
*
* @return string Extra information (Atom, HTML, addresses) in string format
*/
function jabber_format_entry($profile, $notice)
{
$entry = $notice->asAtomEntry(true, true);
$xs = new XMLStringer();
$xs->elementStart('html', array('xmlns' => 'http://jabber.org/protocol/xhtml-im'));
$xs->elementStart('body', array('xmlns' => 'http://www.w3.org/1999/xhtml'));
$xs->element('a', array('href' => $profile->profileurl),
$profile->nickname);
$xs->text(": ");
if (!empty($notice->rendered)) {
$xs->raw($notice->rendered);
} else {
$xs->raw(common_render_content($notice->content, $notice));
}
$xs->elementEnd('body');
$xs->elementEnd('html');
$html = $xs->asString();
return $html . ' ' . $entry;
}
/**
* sends a single text message to a given JID
*
* @param string $to JID to send the message to
* @param string $body body of the message
* @param string $type type of the message
* @param string $subject subject of the message
*
* @return boolean success flag
*/
function jabber_send_message($to, $body, $type='chat', $subject=null)
{
$conn = jabber_connect();
if (!$conn) {
return false;
}
$conn->message($to, $body, $type, $subject);
return true;
}
/**
* sends a presence stanza on the Jabber network
*
* @param string $status current status, free-form string
* @param string $show structured status value
* @param string $to recipient of presence, null for general
* @param string $type type of status message, related to $show
* @param int $priority priority of the presence
*
* @return boolean success value
*/
function jabber_send_presence($status, $show='available', $to=null,
$type = 'available', $priority=null)
{
$conn = jabber_connect();
if (!$conn) {
return false;
}
$conn->presence($status, $show, $to, $type, $priority);
return true;
}
/**
* sends a confirmation request to a JID
*
* @param string $code confirmation code for confirmation URL
* @param string $nickname nickname of confirming user
* @param string $address JID to send confirmation to
*
* @return boolean success flag
*/
function jabber_confirm_address($code, $nickname, $address)
{
$body = 'User "' . $nickname . '" on ' . common_config('site', 'name') . ' ' .
'has said that your Jabber ID belongs to them. ' .
'If that\'s true, you can confirm by clicking on this URL: ' .
common_local_url('confirmaddress', array('code' => $code)) .
' . (If you cannot click it, copy-and-paste it into the ' .
'address bar of your browser). If that user isn\'t you, ' .
'or if you didn\'t request this confirmation, just ignore this message.';
return jabber_send_message($address, $body);
}
/**
* sends a "special" presence stanza on the Jabber network
*
* @param string $type Type of presence
* @param string $to JID to send presence to
* @param string $show show value for presence
* @param string $status status value for presence
*
* @return boolean success flag
*
* @see jabber_send_presence()
*/
function jabber_special_presence($type, $to=null, $show=null, $status=null)
{
// FIXME: why use this instead of jabber_send_presence()?
$conn = jabber_connect();
$to = htmlspecialchars($to);
$status = htmlspecialchars($status);
$out = "<presence";
if ($to) {
$out .= " to='$to'";
}
if ($type) {
$out .= " type='$type'";
}
if ($show == 'available' and !$status) {
$out .= "/>";
} else {
$out .= ">";
if ($show && ($show != 'available')) {
$out .= "<show>$show</show>";
}
if ($status) {
$out .= "<status>$status</status>";
}
$out .= "</presence>";
}
$conn->send($out);
}
/**
* broadcast a notice to all subscribers and reply recipients
*
* This function will send a notice to all subscribers on the local server
* who have Jabber addresses, and have Jabber notification enabled, and
* have this subscription enabled for Jabber. It also sends the notice to
* all recipients of @-replies who have Jabber addresses and Jabber notification
* enabled. This is really the heart of Jabber distribution in Laconica.
*
* @param Notice $notice The notice to broadcast
*
* @return boolean success flag
*/
function jabber_broadcast_notice($notice)
{
if (!common_config('xmpp', 'enabled')) {
return true;
}
$profile = Profile::staticGet($notice->profile_id);
if (!$profile) {
common_log(LOG_WARNING, 'Refusing to broadcast notice with ' .
'unknown profile ' . common_log_objstring($notice),
__FILE__);
return false;
}
$msg = jabber_format_notice($profile, $notice);
$entry = jabber_format_entry($profile, $notice);
$profile->free();
unset($profile);
$sent_to = array();
$conn = jabber_connect();
// First, get users to whom this is a direct reply
$user = new User();
$UT = common_config('db','type')=='pgsql'?'"user"':'user';
$user->query("SELECT $UT.id, $UT.jabber " .
"FROM $UT JOIN reply ON $UT.id = reply.profile_id " .
'WHERE reply.notice_id = ' . $notice->id . ' ' .
"AND $UT.jabber is not null " .
"AND $UT.jabbernotify = 1 " .
"AND $UT.jabberreplies = 1 ");
while ($user->fetch()) {
common_log(LOG_INFO,
'Sending reply notice ' . $notice->id . ' to ' . $user->jabber,
__FILE__);
$conn->message($user->jabber, $msg, 'chat', null, $entry);
$conn->processTime(0);
$sent_to[$user->id] = 1;
}
$user->free();
// Now, get users subscribed to this profile
$user = new User();
$user->query("SELECT $UT.id, $UT.jabber " .
"FROM $UT JOIN subscription " .
"ON $UT.id = subscription.subscriber " .
'WHERE subscription.subscribed = ' . $notice->profile_id . ' ' .
"AND $UT.jabber is not null " .
"AND $UT.jabbernotify = 1 " .
'AND subscription.jabber = 1 ');
while ($user->fetch()) {
if (!array_key_exists($user->id, $sent_to)) {
common_log(LOG_INFO,
'Sending notice ' . $notice->id . ' to ' . $user->jabber,
__FILE__);
$conn->message($user->jabber, $msg, 'chat', null, $entry);
// To keep the incoming queue from filling up,
// we service it after each send.
$conn->processTime(0);
$sent_to[$user->id] = 1;
}
}
// Now, get users who have it in their inbox because of groups
$user = new User();
$user->query("SELECT $UT.id, $UT.jabber " .
"FROM $UT JOIN notice_inbox " .
"ON $UT.id = notice_inbox.user_id " .
'WHERE notice_inbox.notice_id = ' . $notice->id . ' ' .
'AND notice_inbox.source = 2 ' .
"AND $UT.jabber is not null " .
"AND $UT.jabbernotify = 1 ");
while ($user->fetch()) {
if (!array_key_exists($user->id, $sent_to)) {
common_log(LOG_INFO,
'Sending notice ' . $notice->id . ' to ' . $user->jabber,
__FILE__);
$conn->message($user->jabber, $msg, 'chat', null, $entry);
// To keep the incoming queue from filling up,
// we service it after each send.
$conn->processTime(0);
$sent_to[$user->id] = 1;
}
}
$user->free();
return true;
}
/**
* send a notice to all public listeners
*
* For notices that are generated on the local system (by users), we can optionally
* forward them to remote listeners by XMPP.
*
* @param Notice $notice notice to broadcast
*
* @return boolean success flag
*/
function jabber_public_notice($notice)
{
// Now, users who want everything
$public = common_config('xmpp', 'public');
// FIXME PRIV don't send out private messages here
// XXX: should we send out non-local messages if public,localonly
// = false? I think not
if ($public && $notice->is_local) {
$profile = Profile::staticGet($notice->profile_id);
if (!$profile) {
common_log(LOG_WARNING, 'Refusing to broadcast notice with ' .
'unknown profile ' . common_log_objstring($notice),
__FILE__);
return false;
}
$msg = jabber_format_notice($profile, $notice);
$entry = jabber_format_entry($profile, $notice);
$conn = jabber_connect();
foreach ($public as $address) {
common_log(LOG_INFO,
'Sending notice ' . $notice->id .
' to public listener ' . $address,
__FILE__);
$conn->message($address, $msg, 'chat', null, $entry);
$conn->processTime(0);
}
$profile->free();
}
return true;
}
/**
* makes a plain-text formatted version of a notice, suitable for Jabber distribution
*
* @param Profile &$profile profile of the sending user
* @param Notice &$notice notice being sent
*
* @return string plain-text version of the notice, with user nickname prefixed
*/
function jabber_format_notice(&$profile, &$notice)
{
return $profile->nickname . ': ' . $notice->content;
}