scripts/xmppdaemon.php

   1 #!/usr/bin/env php
   2 <?php
   3 /*
   4  * Laconica - a distributed open-source microblogging tool
   5  * Copyright (C) 2008, Controlez-Vous, Inc.
   6  *
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as published by
   9  * the Free Software Foundation, either version 3 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Affero General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Affero General Public License
  18  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 # Abort if called from a web server
  22 if (isset($_SERVER) && array_key_exists('REQUEST_METHOD', $_SERVER)) {
  23         print "This script must be run from the command line\n";
  24         exit();
  25 }
  26
  27 define('INSTALLDIR', realpath(dirname(__FILE__) . '/..'));
  28 define('LACONICA', true);
  29
  30 require_once(INSTALLDIR . '/lib/common.php');
  31 require_once(INSTALLDIR . '/lib/jabber.php');
  32
  33 set_error_handler('common_error_handler');
  34
  35 # This is kind of clunky; we create a class to call the global functions
  36 # in jabber.php, which create a new XMPP class. A more elegant (?) solution
  37 # might be to use make this a subclass of XMPP.
  38
  39 class XMPPDaemon {
  40
  41         function XMPPDaemon($resource=NULL) {
  42                 static $attrs = array('server', 'port', 'user', 'password', 'host');
  43
  44                 foreach ($attrs as $attr)
  45                 {
  46                         $this->$attr = common_config('xmpp', $attr);
  47                 }
  48
  49                 if ($resource) {
  50                         $this->resource = $resource;
  51                 } else {
  52                         $this->resource = common_config('xmpp', 'resource') . 'daemon';
  53                 }
  54
  55                 $this->log(LOG_INFO, "{$this->user}@{$this->server}/{$this->resource}");
  56         }
  57
  58         function connect() {
  59
  60                 $connect_to = ($this->host) ? $this->host : $this->server;
  61
  62                 $this->log(LOG_INFO, "Connecting to $connect_to on port $this->port");
  63
  64                 $this->conn = jabber_connect($this->resource, "Send me a message to post a notice", 100);
  65
  66                 if (!$this->conn) {
  67                         return false;
  68                 }
  69
  70                 return !$this->conn->isDisconnected();
  71         }
  72
  73         function handle() {
  74                 $this->conn->addEventHandler('message', 'handle_message', $this);
  75                 $this->conn->addEventHandler('presence', 'handle_presence', $this);
  76
  77                 $this->conn->process();
  78         }
  79
  80         function get_user($from) {
  81                 $user = User::staticGet('jabber', jabber_normalize_jid($from));
  82                 return $user;
  83         }
  84
  85         function handle_message(&$pl) {
  86                 if ($pl['type'] != 'chat') {
  87                         return;
  88                 }
  89                 if (mb_strlen($pl['body']) == 0) {
  90                         return;
  91                 }
  92
  93                 $from = jabber_normalize_jid($pl['from']);
  94
  95                 # Forwarded from another daemon (probably a broadcaster) for
  96                 # us to handle
  97
  98                 if (preg_match('/^'.jabber_daemon_address().'/', $from)) {
  99                         $from = $this->get_ofrom($pl);
 100                         if (is_null($from)) {
 101                                 return;
 102                         }
 103                 }
 104
 105                 $user = $this->get_user($from);
 106
 107                 if (!$user) {
 108                         $this->from_site($from, 'Unknown user; go to ' .
 109                                                          common_local_url('imsettings') .
 110                                                          ' to add your address to your account');
 111                         $this->log(LOG_WARNING, 'Message from unknown user ' . $from);
 112                         return;
 113                 }
 114                 if ($this->handle_command($user, $pl['body'])) {
 115                         return;
 116                 } else if ($this->is_autoreply($pl['body'])) {
 117                         $this->log(LOG_INFO, 'Ignoring auto reply from ' . $from);
 118                         return;
 119                 } else if ($this->is_otr($pl['body'])) {
 120                         $this->log(LOG_INFO, 'Ignoring OTR from ' . $from);
 121                         return;
 122                 } else {
 123                         $len = mb_strlen($pl['body']);
 124                         if($len > 140) {
 125                                 $this->from_site($from, 'Message too long - maximum is 140 characters, you sent ' . $len);
 126                                 return;
 127                         }
 128                         $this->add_notice($user, $pl);
 129                 }
 130         }
 131
 132         function get_ofrom($pl) {
 133                 $xml = $pl['raw'];
 134                 $addresses = $xml->sub('adddresses');
 135                 if (!$addresses) {
 136                         $this->log(LOG_WARNING, 'Forwarded message without addresses');
 137                         return NULL;
 138                 }
 139                 $address = $xml->sub('address');
 140                 if (!$address) {
 141                         $this->log(LOG_WARNING, 'Forwarded message without address');
 142                         return NULL;
 143                 }
 144                 $type = $address->attr('type');
 145                 if ($type != 'ofrom') {
 146                         $this->log(LOG_WARNING, 'Type of forwarded message is not ofrom');
 147                         return NULL;
 148                 }
 149                 return $address->attr('jid');
 150         }
 151
 152         function is_autoreply($txt) {
 153                 if (preg_match('/[\[\(]?[Aa]uto-?[Rr]eply[\]\)]/', $txt)) {
 154                         return true;
 155                 } else {
 156                         return false;
 157                 }
 158         }
 159
 160         function is_otr($txt) {
 161                 if (preg_match('/^\?OTR/', $txt)) {
 162                         return true;
 163                 } else {
 164                         return false;
 165                 }
 166         }
 167
 168         function from_site($address, $msg) {
 169                 $text = '['.common_config('site', 'name') . '] ' . $msg;
 170                 jabber_send_message($address, $text);
 171         }
 172
 173         function handle_command($user, $body) {
 174                 # XXX: localise
 175                 $p=explode(' ',$body);
 176                 if(count($p)>2)
 177                         return false;
 178                 switch($p[0]) {
 179                  case 'help':
 180                         if(count($p)!=1)
 181                                 return false;
 182                         $this->from_site($user->jabber, "Commands:\n on     - turn on notifications\n off    - turn off notifications\n help   - show this help \n sub - subscribe to user\n unsub - unsubscribe from user");
 183                         return true;
 184                  case 'on':
 185                         if(count($p)!=1)
 186                                 return false;
 187                         $this->set_notify($user, true);
 188                         $this->from_site($user->jabber, 'notifications on');
 189                         return true;
 190                  case 'off':
 191                         if(count($p)!=1)
 192                                 return false;
 193                         $this->set_notify($user, false);
 194                         $this->from_site($user->jabber, 'notifications off');
 195                         return true;
 196                  case 'sub':
 197                         if(count($p)==1) {
 198                                 $this->from_site($user->jabber, 'Specify the name of the user to subscribe to');
 199                                 return true;
 200                         }
 201                         $result=subs_subscribe_user($user, $p[1]);
 202                         if($result=='true')
 203                                 $this->from_site($user->jabber, 'Subscribed to ' . $p[1]);
 204                         else
 205                                 $this->from_site($user->jabber, $result);
 206                         return true;
 207                  case 'unsub':
 208                         if(count($p)==1) {
 209                                 $this->from_site($user->jabber, 'Specify the name of the user to unsubscribe from');
 210                                 return true;
 211                         }
 212                         $result=subs_unsubscribe_user($user, $p[1]);
 213                         if($result=='true')
 214                                 $this->from_site($user->jabber, 'Unsubscribed from ' . $p[1]);
 215                         else
 216                                 $this->from_site($user->jabber, $result);
 217                         return true;
 218                  default:
 219                         return false;
 220                 }
 221         }
 222
 223         function set_notify(&$user, $notify) {
 224                 $orig = clone($user);
 225                 $user->jabbernotify = $notify;
 226                 $result = $user->update($orig);
 227                 if (!$result) {
 228                         $last_error = &PEAR::getStaticProperty('DB_DataObject','lastError');
 229                         $this->log(LOG_ERR,
 230                                            'Could not set notify flag to ' . $notify .
 231                                            ' for user ' . common_log_objstring($user) .
 232                                            ': ' . $last_error->message);
 233                 } else {
 234                         $this->log(LOG_INFO,
 235                                            'User ' . $user->nickname . ' set notify flag to ' . $notify);
 236                 }
 237         }
 238
 239         function add_notice(&$user, &$pl) {
 240                 $notice = Notice::saveNew($user->id, trim(mb_substr($pl['body'], 0, 140)), 'xmpp');
 241                 if (is_string($notice)) {
 242                         $this->log(LOG_ERR, $notice);
 243                         return;
 244                 }
 245                 common_broadcast_notice($notice);
 246                 $this->log(LOG_INFO,
 247                                    'Added notice ' . $notice->id . ' from user ' . $user->nickname);
 248         }
 249
 250         function handle_presence(&$pl) {
 251                 $from = jabber_normalize_jid($pl['from']);
 252                 switch ($pl['type']) {
 253                  case 'subscribe':
 254                         # We let anyone subscribe
 255                         $this->subscribed($from);
 256                         $this->log(LOG_INFO,
 257                                            'Accepted subscription from ' . $from);
 258                         break;
 259                  case 'subscribed':
 260                  case 'unsubscribed':
 261                  case 'unsubscribe':
 262                         $this->log(LOG_INFO,
 263                                            'Ignoring  "' . $pl['type'] . '" from ' . $from);
 264                         break;
 265                  default:
 266                         if (!$pl['type']) {
 267                                 $user = User::staticGet('jabber', $from);
 268                                 if (!$user) {
 269                                         $this->log(LOG_WARNING, 'Presence from unknown user ' . $from);
 270                                         return;
 271                                 }
 272                                 if ($user->updatefrompresence) {
 273                                         $this->log(LOG_INFO, 'Updating ' . $user->nickname .
 274                                                            ' status from presence.');
 275                                         $this->add_notice($user, $pl);
 276                                 }
 277                         }
 278                         break;
 279                 }
 280         }
 281
 282         function log($level, $msg) {
 283                 common_log($level, 'XMPPDaemon('.$this->resource.'): '.$msg);
 284         }
 285
 286         function subscribed($to) {
 287                 jabber_special_presence('subscribed', $to);
 288         }
 289 }
 290
 291 mb_internal_encoding('UTF-8');
 292
 293 $resource = ($argc > 1) ? $argv[1] : (common_config('xmpp','resource') . '-listen');
 294
 295 $daemon = new XMPPDaemon($resource);
 296
 297 if ($daemon->connect()) {
 298         $daemon->handle();
 299 }