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-<?php
-/**
- * StatusNet, 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 StatusNet
- * @author Evan Prodromou <evan@status.net>
- * @copyright 2008 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 '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 StatusNet instance
- *
- * @return string JID of the Jabber daemon
- */
-
-function jabber_daemon_address()
-{
- return common_config('xmpp', 'user') . '@' . common_config('xmpp', 'server');
-}
-
-class Sharing_XMPP extends XMPPHP_XMPP
-{
- function getSocket()
- {
- return $this->socket;
- }
-}
-
-/**
- * Build an XMPP proxy connection that'll save outgoing messages
- * to the 'xmppout' queue to be picked up by xmppdaemon later.
- *
- * If queueing is disabled, we'll grab a live connection.
- *
- * @return XMPPHP
- */
-function jabber_proxy()
-{
- if (common_config('queue', 'enabled')) {
- $proxy = new Queued_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'),
- common_config('xmpp', 'resource') . 'daemon',
- common_config('xmpp', 'server'),
- common_config('xmpp', 'debug') ?
- true : false,
- common_config('xmpp', 'debug') ?
- XMPPHP_Log::LEVEL_VERBOSE : null);
- return $proxy;
- } else {
- return jabber_connect();
- }
-}
-
-/**
- * Lazy-connect the configured Jabber account to the configured server;
- * if already opened, the same connection will be returned.
- *
- * In a multi-site background process, each site configuration
- * will get its own connection.
- *
- * @param string $resource Resource to connect (defaults to configured resource)
- *
- * @return XMPPHP connection to the configured server
- */
-
-function jabber_connect($resource=null)
-{
- static $connections = array();
- $site = common_config('site', 'server');
- if (empty($connections[$site])) {
- if (empty($resource)) {
- $resource = common_config('xmpp', 'resource');
- }
- $conn = new Sharing_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'),
- $resource,
- common_config('xmpp', 'server'),
- common_config('xmpp', 'debug') ?
- true : false,
- common_config('xmpp', 'debug') ?
- XMPPHP_Log::LEVEL_VERBOSE : null
- );
-
- if (!$conn) {
- return false;
- }
- $connections[$site] = $conn;
-
- $conn->autoSubscribe();
- $conn->useEncryption(common_config('xmpp', 'encryption'));
-
- try {
- common_log(LOG_INFO, __METHOD__ . ": connecting " .
- common_config('xmpp', 'user') . '/' . $resource);
- //$conn->connect(true); // true = persistent connection
- $conn->connect(); // persistent connections break multisite
- } catch (XMPPHP_Exception $e) {
- common_log(LOG_ERR, $e->getMessage());
- return false;
- }
-
- $conn->processUntil('session_start');
- }
- return $connections[$site];
-}
-
-/**
- * Queue send for 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_proxy();
- $profile = Profile::staticGet($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->text(" ");
- $xs->element('a', array(
- 'href'=>common_local_url('conversation',
- array('id' => $notice->conversation)).'#notice-'.$notice->id
- ),sprintf(_('[%s]'),$notice->id));
- $xs->elementEnd('body');
- $xs->elementEnd('html');
-
- $html = $xs->getString();
-
- 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_proxy();
- $conn->message($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);
-}
-
-/**
- * Queue broadcast of 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 StatusNet.
- *
- * @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 true; // not recoverable; discard.
- }
-
- $msg = jabber_format_notice($profile, $notice);
- $entry = jabber_format_entry($profile, $notice);
-
- $profile->free();
- unset($profile);
-
- $sent_to = array();
-
- $conn = jabber_proxy();
-
- $ni = $notice->whoGets();
-
- foreach ($ni as $user_id => $reason) {
- $user = User::staticGet($user_id);
- if (empty($user) ||
- empty($user->jabber) ||
- !$user->jabbernotify) {
- // either not a local user, or just not found
- continue;
- }
- switch ($reason) {
- case NOTICE_INBOX_SOURCE_REPLY:
- if (!$user->jabberreplies) {
- continue 2;
- }
- break;
- case NOTICE_INBOX_SOURCE_SUB:
- $sub = Subscription::pkeyGet(array('subscriber' => $user->id,
- 'subscribed' => $notice->profile_id));
- if (empty($sub) || !$sub->jabber) {
- continue 2;
- }
- break;
- case NOTICE_INBOX_SOURCE_GROUP:
- break;
- default:
- throw new Exception(sprintf(_("Unknown inbox source %d."), $reason));
- }
-
- common_log(LOG_INFO,
- 'Sending notice ' . $notice->id . ' to ' . $user->jabber,
- __FILE__);
- $conn->message($user->jabber, $msg, 'chat', null, $entry);
- }
-
- return true;
-}
-
-/**
- * Queue send of 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 == Notice::LOCAL_PUBLIC) {
- $profile = Profile::staticGet($notice->profile_id);
-
- if (!$profile) {
- common_log(LOG_WARNING, 'Refusing to broadcast notice with ' .
- 'unknown profile ' . common_log_objstring($notice),
- __FILE__);
- return true; // not recoverable; discard.
- }
-
- $msg = jabber_format_notice($profile, $notice);
- $entry = jabber_format_entry($profile, $notice);
-
- $conn = jabber_proxy();
-
- foreach ($public as $address) {
- common_log(LOG_INFO,
- 'Sending notice ' . $notice->id .
- ' to public listener ' . $address,
- __FILE__);
- $conn->message($address, $msg, 'chat', null, $entry);
- }
- $profile->free();
- }
-
- return true;
-}
-
-/**
- * makes a plain-text formatted version of a notice, suitable for Jabber distribution
- *
- * @param Profile &$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 . ' [' . $notice->id . ']';
-}
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