lib/activitymover.php

   1 <?php
   2 /**
   3  * StatusNet - the distributed open-source microblogging tool
   4  * Copyright (C) 2010, StatusNet, Inc.
   5  *
   6  * Title of module
   7  *
   8  * PHP version 5
   9  *
  10  * This program is free software: you can redistribute it and/or modify
  11  * it under the terms of the GNU Affero General Public License as published by
  12  * the Free Software Foundation, either version 3 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU Affero General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU Affero General Public License
  21  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  22  *
  23  * @category  Cache
  24  * @package   StatusNet
  25  * @author    Evan Prodromou <evan@status.net>
  26  * @copyright 2010 StatusNet, Inc.
  27  * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
  28  * @link      http://status.net/
  29  */
  30
  31 if (!defined('STATUSNET')) {
  32     // This check helps protect against security problems;
  33     // your code file can't be executed directly from the web.
  34     exit(1);
  35 }
  36
  37 /**
  38  * Class comment
  39  *
  40  * @category  General
  41  * @package   StatusNet
  42  * @author    Evan Prodromou <evan@status.net>
  43  * @copyright 2010 StatusNet, Inc.
  44  * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
  45  * @link      http://status.net/
  46  */
  47 class ActivityMover extends QueueHandler
  48 {
  49     function transport()
  50     {
  51         return 'actmove';
  52     }
  53
  54     function handle($data)
  55     {
  56         list ($act, $sink, $userURI, $remoteURI) = $data;
  57
  58         $user   = User::getKV('uri', $userURI);
  59         $remote = Profile::fromURI($remoteURI);
  60
  61         try {
  62             $this->moveActivity($act, $sink, $user, $remote);
  63         } catch (ClientException $cex) {
  64             $this->log(LOG_WARNING,
  65                        $cex->getMessage());
  66             // "don't retry me"
  67             return true;
  68         } catch (ServerException $sex) {
  69             $this->log(LOG_WARNING,
  70                        $sex->getMessage());
  71             // "retry me" (because we think the server might handle it next time)
  72             return false;
  73         } catch (Exception $ex) {
  74             $this->log(LOG_WARNING,
  75                        $ex->getMessage());
  76             // "don't retry me"
  77             return true;
  78         }
  79     }
  80
  81     function moveActivity($act, $sink, $user, $remote)
  82     {
  83         if (empty($user)) {
  84             // TRANS: Exception thrown if a non-existing user is provided. %s is a user ID.
  85             throw new Exception(sprintf(_('No such user "%s".'),$act->actor->id));
  86         }
  87
  88         switch ($act->verb) {
  89         case ActivityVerb::FAVORITE:
  90             $this->log(LOG_INFO,
  91                        "Moving favorite of {$act->objects[0]->id} by ".
  92                        "{$act->actor->id} to {$remote->nickname}.");
  93             // push it, then delete local
  94             $sink->postActivity($act);
  95             $notice = Notice::getKV('uri', $act->objects[0]->id);
  96             if (!empty($notice)) {
  97                 $fave = Fave::pkeyGet(array('user_id' => $user->id,
  98                                             'notice_id' => $notice->id));
  99                 $fave->delete();
 100             }
 101             break;
 102         case ActivityVerb::POST:
 103             $this->log(LOG_INFO,
 104                        "Moving notice {$act->objects[0]->id} by ".
 105                        "{$act->actor->id} to {$remote->nickname}.");
 106             // XXX: send a reshare, not a post
 107             $sink->postActivity($act);
 108             $notice = Notice::getKV('uri', $act->objects[0]->id);
 109             if (!empty($notice)) {
 110                 $notice->delete();
 111             }
 112             break;
 113         case ActivityVerb::JOIN:
 114             $this->log(LOG_INFO,
 115                        "Moving group join of {$act->objects[0]->id} by ".
 116                        "{$act->actor->id} to {$remote->nickname}.");
 117             $sink->postActivity($act);
 118             $group = User_group::getKV('uri', $act->objects[0]->id);
 119             if (!empty($group)) {
 120                 $user->leaveGroup($group);
 121             }
 122             break;
 123         case ActivityVerb::FOLLOW:
 124             if ($act->actor->id == $user->uri) {
 125                 $this->log(LOG_INFO,
 126                            "Moving subscription to {$act->objects[0]->id} by ".
 127                            "{$act->actor->id} to {$remote->nickname}.");
 128                 $sink->postActivity($act);
 129                 $other = Profile::fromURI($act->objects[0]->id);
 130                 if (!empty($other)) {
 131                     Subscription::cancel($user->getProfile(), $other);
 132                 }
 133             } else {
 134                 $otherUser = User::getKV('uri', $act->actor->id);
 135                 if (!empty($otherUser)) {
 136                     $this->log(LOG_INFO,
 137                                "Changing sub to {$act->objects[0]->id}".
 138                                "by {$act->actor->id} to {$remote->nickname}.");
 139                     $otherProfile = $otherUser->getProfile();
 140                     Subscription::start($otherProfile, $remote);
 141                     Subscription::cancel($otherProfile, $user->getProfile());
 142                 } else {
 143                     $this->log(LOG_NOTICE,
 144                                "Not changing sub to {$act->objects[0]->id}".
 145                                "by remote {$act->actor->id} ".
 146                                "to {$remote->nickname}.");
 147                 }
 148             }
 149             break;
 150         }
 151     }
 152
 153     /**
 154      * Log some data
 155      *
 156      * Add a header for our class so we know who did it.
 157      *
 158      * @param int    $level   Log level, like LOG_ERR or LOG_INFO
 159      * @param string $message Message to log
 160      *
 161      * @return void
 162      */
 163     protected function log($level, $message)
 164     {
 165         common_log($level, "ActivityMover: " . $message);
 166     }
 167 }