xmppdaemon.php

   1 <?php
   2 /*
   3  * Laconica - a distributed open-source microblogging tool
   4  * Copyright (C) 2008, Controlez-Vous, Inc.
   5  *
   6  * This program is free software: you can redistribute it and/or modify
   7  * it under the terms of the GNU Affero General Public License as published by
   8  * the Free Software Foundation, either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU Affero General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Affero General Public License
  17  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 # Abort if called from a web server
  21 if (isset($_SERVER) && array_key_exists('REQUEST_METHOD', $_SERVER)) {
  22         print "This script must be run from the command line\n";
  23         exit();
  24 }
  25
  26 define('INSTALLDIR', dirname(__FILE__));
  27 define('LACONICA', true);
  28
  29 require_once(INSTALLDIR . '/lib/common.php');
  30 require_once(INSTALLDIR . '/lib/jabber.php');
  31
  32 class XMPPDaemon {
  33
  34         function XMPPDaemon($resource=NULL) {
  35                 static $attrs = array('server', 'port', 'user', 'password',
  36                                            'resource', 'host');
  37
  38                 foreach ($attrs as $attr)
  39                 {
  40                         $this->$attr = common_config('xmpp', $attr);
  41                 }
  42
  43                 if ($resource) {
  44                         $this->resource = $resource;
  45                 }
  46         }
  47
  48         function connect() {
  49                 $this->conn = jabber_connect($this->resource,
  50                                                                      "Send me a message to post a notice");
  51                 if (!$this->conn) {
  52                         return false;
  53                 }
  54                 return !$this->conn->disconnected;
  55         }
  56
  57         function handle() {
  58                 while(!$this->conn->disconnected) {
  59                         $payloads = $this->conn->processUntil(array('message', 'presence',
  60                                                                                                                 'end_stream', 'session_start'));
  61                         foreach($payloads as $event) {
  62                                 $pl = $event[1];
  63                                 switch($event[0]) {
  64                                  case 'message':
  65                                         $this->handle_message($pl);
  66                                         break;
  67                                  case 'presence':
  68                                         $this->handle_presence($pl);
  69                                         break;
  70                                  case 'session_start':
  71                                         $this->handle_session($pl);
  72                                         break;
  73                                 }
  74                         }
  75                 }
  76         }
  77
  78         function handle_message(&$pl) {
  79                 if ($pl['type'] != 'chat') {
  80                         return;
  81                 }
  82                 if (strlen($pl['body']) == 0) {
  83                         return;
  84                 }
  85                 $from = jabber_normalize_jid($pl['from']);
  86                 $user = User::staticGet('jabber', $from);
  87                 if (!$user) {
  88                         $this->log(LOG_WARNING, 'Message from unknown user ' . $from);
  89                         return;
  90                 }
  91                 if ($this->handle_command($user, $pl['body'])) {
  92                         return;
  93                 } else {
  94                         $this->add_notice($user, $pl);
  95                 }
  96         }
  97
  98         function handle_command($user, $body) {
  99                 # XXX: localise
 100                 switch(trim($body)) {
 101                  case 'on':
 102                         $this->set_notify($user, true);
 103                         return true;
 104                  case 'off':
 105                         $this->set_notify($user, false);
 106                         return true;
 107                  default:
 108                         return false;
 109                 }
 110         }
 111
 112         function set_notify(&$user, $notify) {
 113                 $orig = clone($user);
 114                 $user->jabbernotify = $notify;
 115                 $result = $user->update($orig);
 116                 if (!$id) {
 117                         $last_error = &PEAR::getStaticProperty('DB_DataObject','lastError');
 118                         $this->log(LOG_ERROR,
 119                                            'Could not set notify flag to ' . $notify .
 120                                            ' for user ' . common_log_objstring($user) .
 121                                            ': ' . $last_error->message);
 122                 } else {
 123                         $this->log(LOG_INFO,
 124                                            'User ' . $user->nickname . ' set notify flag to ' . $notify);
 125                 }
 126         }
 127
 128         function add_notice(&$user, &$pl) {
 129                 $notice = new Notice();
 130                 $notice->profile_id = $user->id;
 131                 $notice->content = trim(substr($pl['body'], 0, 140));
 132                 $notice->created = DB_DataObject_Cast::dateTime();
 133                 $notice->query('BEGIN');
 134                 $id = $notice->insert();
 135                 if (!$id) {
 136                         $last_error = &PEAR::getStaticProperty('DB_DataObject','lastError');
 137                         $this->log(LOG_ERROR,
 138                                            'Could not insert ' . common_log_objstring($notice) .
 139                                            ' for user ' . common_log_objstring($user) .
 140                                            ': ' . $last_error->message);
 141                         return;
 142                 }
 143                 $orig = clone($notice);
 144                 $notice->uri = common_notice_uri($notice);
 145                 $result = $notice->update($orig);
 146                 if (!$result) {
 147                         $last_error = &PEAR::getStaticProperty('DB_DataObject','lastError');
 148                         $this->log(LOG_ERROR,
 149                                            'Could not add URI to ' . common_log_objstring($notice) .
 150                                            ' for user ' . common_log_objstring($user) .
 151                                            ': ' . $last_error->message);
 152                         return;
 153                 }
 154                 $notice->query('COMMIT');
 155                 common_broadcast_notice($notice);
 156                 $this->log(LOG_INFO,
 157                                    'Added notice ' . $notice->id . ' from user ' . $user->nickname);
 158         }
 159
 160         function handle_presence(&$pl) {
 161                 $from = jabber_normalize_jid($pl['from']);
 162                 switch ($pl['type']) {
 163                         case 'subscribe':
 164                             # We let anyone subscribe
 165                                 $this->subscribed($from);
 166                                 break;
 167                         case 'subscribed':
 168                         case 'unsubscribe':
 169                         case 'unsubscribed':
 170                                 # XXX: do we care?
 171                                 break;
 172                         default:
 173                                 if (!$pl['type']) {
 174                                         $user = User::staticGet('jabber', $from);
 175                                         if (!$user) {
 176                                                 $this->log(LOG_WARNING, 'Message from unknown user ' . $from);
 177                                                 return;
 178                                         }
 179                                         if ($user->updatefrompresence) {
 180                                                 $this->add_notice($user, $pl);
 181                                         }
 182                                 }
 183                                 break;
 184                 }
 185         }
 186
 187         function log($level, $msg) {
 188                 common_log($level, 'XMPPDaemon('.$this->resource.'): '.$msg);
 189         }
 190
 191         function subscribed($to) {
 192                 $this->special_presence('subscribed', $to);
 193         }
 194
 195         function special_presence($type, $to=NULL, $show=NULL, $status=NULL) {
 196                 $to = htmlspecialchars($to);
 197                 $status = htmlspecialchars($status);
 198                 $out = "<presence";
 199                 if($to) $out .= " to='$to'";
 200                 if($type) $out .= " type='$type'";
 201                 if($show == 'available' and !$status) {
 202                         $out .= "/>";
 203                 } else {
 204                         $out .= ">";
 205                         if($show && ($show != 'available')) $out .= "<show>$show</show>";
 206                         if($status) $out .= "<status>$status</status>";
 207                         $out .= "</presence>";
 208                 }
 209                 $this->conn->send($out);
 210         }
 211 }
 212
 213 $daemon = new XMPPDaemon();
 214
 215 if ($daemon->connect()) {
 216         $daemon->handle();
 217 }
 218 ?>