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('xmpp.php');
  31
  32 class XMPPDaemon {
  33
  34         function XMPPDaemon() {
  35                 static $attrs = array('server', 'port', 'user', 'password',
  36                                            'resource');
  37
  38                 foreach ($attrs as $attr)
  39                 {
  40                         $this->$attr = common_config('xmpp', $attr);
  41                 }
  42         }
  43
  44         function connect() {
  45                 $this->conn = new XMPP($this->server, $this->port, $this->user,
  46                                                            $this->password, $this->resource);
  47                 if (!$this->conn) {
  48                         return false;
  49                 }
  50                 $this->conn->connect();
  51                 return !$this->conn->disconnected;
  52         }
  53
  54         function handle() {
  55                 while(!$this->conn->disconnected) {
  56                         $payloads = $this->conn->processUntil(array('message', 'presence',
  57                                                                                                                 'end_stream', 'session_start'));
  58                         foreach($payloads as $event) {
  59                                 $pl = $event[1];
  60                                 switch($event[0]) {
  61                                  case 'message':
  62                                         $this->handle_message($pl);
  63                                         break;
  64                                  case 'presence':
  65                                         $this->handle_presence($pl);
  66                                         break;
  67                                  case 'session_start':
  68                                         $this->handle_session($pl);
  69                                         break;
  70                                 }
  71                         }
  72                 }
  73         }
  74
  75         function handle_message(&$pl) {
  76                 if ($pl['type'] != 'chat') {
  77                         return;
  78                 }
  79                 if (strlen($pl['body']) == 0) {
  80                         return;
  81                 }
  82                 $from = jabber_normalize_jid($pl['from']);
  83                 $user = User::staticGet('jabber', $from);
  84                 if (!$user) {
  85                         $this->log(LOG_WARNING, 'Message from unknown user ' . $from);
  86                         return;
  87                 }
  88                 if ($this->handle_command($user, $pl['body'])) {
  89                         return;
  90                 } else {
  91                         $this->add_notice($user, $pl);
  92                 }
  93         }
  94
  95         function handle_command($user, $body) {
  96                 # XXX: localise
  97                 switch(trim($body)) {
  98                  case 'on':
  99                         $this->set_notify($user, true);
 100                         return true;
 101                  case 'off':
 102                         $this->set_notify($user, false);
 103                         return true;
 104                  default:
 105                         return false;
 106                 }
 107         }
 108
 109         function set_notify(&$user, $notify) {
 110                 $orig = clone($user);
 111                 $user->jabbernotify = $notify;
 112                 $result = $user->update($orig);
 113                 if (!$id) {
 114                         $last_error = &PEAR::getStaticProperty('DB_DataObject','lastError');
 115                         $this->log(LOG_ERROR,
 116                                            'Could not set notify flag to ' . $notify .
 117                                            ' for user ' . common_log_objstring($user) .
 118                                            ': ' . $last_error->message);
 119                 } else {
 120                         $this->log(LOG_INFO,
 121                                            'User ' . $user->nickname . ' set notify flag to ' . $notify);
 122                 }
 123         }
 124
 125         function add_notice(&$user, &$pl) {
 126                 $notice = new Notice();
 127                 $notice->profile_id = $user->id;
 128                 $notice->content = trim(substr($pl['body'], 0, 140));
 129                 $notice->created = DB_DataObject_Cast::dateTime();
 130                 $notice->query('BEGIN');
 131                 $id = $notice->insert();
 132                 if (!$id) {
 133                         $last_error = &PEAR::getStaticProperty('DB_DataObject','lastError');
 134                         $this->log(LOG_ERROR,
 135                                            'Could not insert ' . common_log_objstring($notice) .
 136                                            ' for user ' . common_log_objstring($user) .
 137                                            ': ' . $last_error->message);
 138                         return;
 139                 }
 140                 $orig = clone($notice);
 141                 $notice->uri = common_notice_uri($notice);
 142                 $result = $notice->update($orig);
 143                 if (!$result) {
 144                         $last_error = &PEAR::getStaticProperty('DB_DataObject','lastError');
 145                         $this->log(LOG_ERROR,
 146                                            'Could not add URI to ' . common_log_objstring($notice) .
 147                                            ' for user ' . common_log_objstring($user) .
 148                                            ': ' . $last_error->message);
 149                         return;
 150                 }
 151                 common_broadcast_notice($notice);
 152                 $this->log(LOG_INFO,
 153                                    'Added notice ' . $notice->id . ' from user ' . $user->nickname);
 154         }
 155
 156         function handle_presence(&$pl) {
 157                 $from = jabber_normalize_jid($pl['from']);
 158                 switch ($pl['type']) {
 159                         case 'subscribe':
 160                             # We let anyone subscribe
 161                                 $this->subscribed($from);
 162                                 break;
 163                         case 'subscribed':
 164                             # Are we trying to confirm this address?
 165                 $confirm = Confirm_address::staticGet('address', $from);
 166                 if ($confirm) {
 167                                         $this->send_confirmation_code($from, $confirm);
 168                                 }
 169                                 # Otherwise, silently ignore
 170                                 break;
 171                         case 'unsubscribe':
 172                         case 'unsubscribed':
 173                                 # XXX: do we care?
 174                                 break;
 175                         default:
 176                                 if (!$pl['type']) {
 177                                         $user = User::staticGet('jabber', $from);
 178                                         if (!$user) {
 179                                                 $this->log(LOG_WARNING, 'Message from unknown user ' . $from);
 180                                                 return;
 181                                         }
 182                                         if ($user->updatefrompresence) {
 183                                                 $this->add_notice($user, $pl);
 184                                         }
 185                                 }
 186                                 break;
 187                 }
 188         }
 189
 190         function handle_session(&$pl) {
 191                 $this->conn->presence($status="Send me a message to post a notice");
 192         }
 193
 194         function log($level, $msg) {
 195                 common_log($level, 'XMPPDaemon('.$this->resource.'): '.$msg);
 196         }
 197
 198         function subscribed($to) {
 199                 $this->special_presence('subscribed', $to);
 200         }
 201
 202         function special_presence($type, $to=NULL, $show=NULL, $status=NULL) {
 203                 $to = htmlspecialchars($to);
 204                 $status = htmlspecialchars($status);
 205                 $out = "<presence";
 206                 if($to) $out .= " to='$to'";
 207                 if($type) $out .= " type='$type'";
 208                 if($show == 'available' and !$status) {
 209                         $out .= "/>";
 210                 } else {
 211                         $out .= ">";
 212                         if($show && ($show != 'available')) $out .= "<show>$show</show>";
 213                         if($status) $out .= "<status>$status</status>";
 214                         $out .= "</presence>";
 215                 }
 216                 $this->conn->send($out);
 217         }
 218
 219         function send_confirmation_code($to, &$confirm) {
 220                 $body = 'Someone has asked to add this Jabber ID to their ' .
 221                         'account on ' . common_config('site', 'name') . '. ' .
 222                         'If it was you, you can confirm by clicking on this URL: ' .
 223                         common_local_url('confirmaddress', array('code' => $confirm->code)) .
 224                         ' . (If you cannot click it, copy-and-paste it into the ' .
 225                         'address bar of your browser). If it wasn\'t you, ' .
 226                         'just ignore this message.';
 227
 228                 $this->conn->message($to, $body);
 229         }
 230 }
 231
 232 $daemon = new XMPPDaemon();
 233
 234 if ($daemon->connect()) {
 235         $daemon->handle();
 236 }
 237 ?>