lib/activityimporter.php

   1 <?php
   2 /**
   3  * StatusNet - the distributed open-source microblogging tool
   4  * Copyright (C) 2010, StatusNet, Inc.
   5  *
   6  * class to import activities as part of a user's timeline
   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('GNUSOCIAL')) { exit(1); }
  32
  33 /**
  34  * Class comment
  35  *
  36  * @category  General
  37  * @package   StatusNet
  38  * @author    Evan Prodromou <evan@status.net>
  39  * @copyright 2010 StatusNet, Inc.
  40  * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
  41  * @link      http://status.net/
  42  */
  43 class ActivityImporter extends QueueHandler
  44 {
  45     private $trusted = false;
  46
  47     /**
  48      * Function comment
  49      *
  50      * @param
  51      *
  52      * @return
  53      */
  54     function handle($data)
  55     {
  56         list($user, $author, $activity, $trusted) = $data;
  57
  58         $this->trusted = $trusted;
  59
  60         $done = null;
  61
  62         try {
  63             if (Event::handle('StartImportActivity',
  64                               array($user, $author, $activity, $trusted, &$done))) {
  65                 switch ($activity->verb) {
  66                 case ActivityVerb::FOLLOW:
  67                     $this->subscribeProfile($user, $author, $activity);
  68                     break;
  69                 case ActivityVerb::JOIN:
  70                     $this->joinGroup($user, $activity);
  71                     break;
  72                 case ActivityVerb::POST:
  73                     $this->postNote($user, $author, $activity);
  74                     break;
  75                 default:
  76                     // TRANS: Client exception thrown when using an unknown verb for the activity importer.
  77                     throw new ClientException(sprintf(_("Unknown verb: \"%s\"."),$activity->verb));
  78                 }
  79                 Event::handle('EndImportActivity',
  80                               array($user, $author, $activity, $trusted));
  81                 $done = true;
  82             }
  83         } catch (Exception $e) {
  84             common_log(LOG_ERR, $e->getMessage());
  85             $done = true;
  86         }
  87         return $done;
  88     }
  89
  90     function subscribeProfile($user, $author, $activity)
  91     {
  92         $profile = $user->getProfile();
  93
  94         if ($activity->objects[0]->id == $author->id) {
  95             if (!$this->trusted) {
  96                 // TRANS: Client exception thrown when trying to force a subscription for an untrusted user.
  97                 throw new ClientException(_('Cannot force subscription for untrusted user.'));
  98             }
  99
 100             $other = $activity->actor;
 101             $otherUser = User::getKV('uri', $other->id);
 102
 103             if (!$otherUser instanceof User) {
 104                 // TRANS: Client exception thrown when trying to force a remote user to subscribe.
 105                 throw new Exception(_('Cannot force remote user to subscribe.'));
 106             }
 107
 108             $otherProfile = $otherUser->getProfile();
 109
 110             // XXX: don't do this for untrusted input!
 111
 112             Subscription::start($otherProfile, $profile);
 113         } else if (empty($activity->actor)
 114                    || $activity->actor->id == $author->id) {
 115
 116             $other = $activity->objects[0];
 117
 118             try {
 119                 $otherProfile = Profile::fromUri($other->id);
 120                 // TRANS: Client exception thrown when trying to subscribe to an unknown profile.
 121             } catch (UnknownUriException $e) {
 122                 // Let's convert it to a client exception instead of server.
 123                 throw new ClientException(_('Unknown profile.'));
 124             }
 125
 126             Subscription::start($profile, $otherProfile);
 127         } else {
 128             // TRANS: Client exception thrown when trying to import an event not related to the importing user.
 129             throw new Exception(_('This activity seems unrelated to our user.'));
 130         }
 131     }
 132
 133     function joinGroup($user, $activity)
 134     {
 135         // XXX: check that actor == subject
 136
 137         $uri = $activity->objects[0]->id;
 138
 139         $group = User_group::getKV('uri', $uri);
 140
 141         if (!$group instanceof User_group) {
 142             $oprofile = Ostatus_profile::ensureActivityObjectProfile($activity->objects[0]);
 143             if (!$oprofile->isGroup()) {
 144                 // TRANS: Client exception thrown when trying to join a remote group that is not a group.
 145                 throw new ClientException(_('Remote profile is not a group!'));
 146             }
 147             $group = $oprofile->localGroup();
 148         }
 149
 150         assert(!empty($group));
 151
 152         if ($user->isMember($group)) {
 153             // TRANS: Client exception thrown when trying to join a group the importing user is already a member of.
 154             throw new ClientException(_("User is already a member of this group."));
 155         }
 156
 157         $user->joinGroup($group);
 158     }
 159
 160     // XXX: largely cadged from Ostatus_profile::processNote()
 161
 162     function postNote($user, $author, $activity)
 163     {
 164         $note = $activity->objects[0];
 165
 166         $sourceUri = $note->id;
 167
 168         $notice = Notice::getKV('uri', $sourceUri);
 169
 170         if ($notice instanceof Notice) {
 171
 172             common_log(LOG_INFO, "Notice {$sourceUri} already exists.");
 173
 174             if ($this->trusted) {
 175
 176                 $profile = $notice->getProfile();
 177
 178                 $uri = $profile->getUri();
 179
 180                 if ($uri === $author->id) {
 181                     common_log(LOG_INFO, sprintf('Updating notice author from %s to %s', $author->id, $user->getUri()));
 182                     $orig = clone($notice);
 183                     $notice->profile_id = $user->id;
 184                     $notice->update($orig);
 185                     return;
 186                 } else {
 187                     // TRANS: Client exception thrown when trying to import a notice by another user.
 188                     // TRANS: %1$s is the source URI of the notice, %2$s is the URI of the author.
 189                     throw new ClientException(sprintf(_('Already know about notice %1$s and '.
 190                                                         ' it has a different author %2$s.'),
 191                                                       $sourceUri, $uri));
 192                 }
 193             } else {
 194                 // TRANS: Client exception thrown when trying to overwrite the author information for a non-trusted user during import.
 195                 throw new ClientException(_('Not overwriting author info for non-trusted user.'));
 196             }
 197         }
 198
 199         // Use summary as fallback for content
 200
 201         if (!empty($note->content)) {
 202             $sourceContent = $note->content;
 203         } else if (!empty($note->summary)) {
 204             $sourceContent = $note->summary;
 205         } else if (!empty($note->title)) {
 206             $sourceContent = $note->title;
 207         } else {
 208             // @fixme fetch from $sourceUrl?
 209             // TRANS: Client exception thrown when trying to import a notice without content.
 210             // TRANS: %s is the notice URI.
 211             throw new ClientException(sprintf(_('No content for notice %s.'),$sourceUri));
 212         }
 213
 214         // Get (safe!) HTML and text versions of the content
 215
 216         $rendered = $this->purify($sourceContent);
 217         $content = common_strip_html($rendered);
 218
 219         $shortened = $user->shortenLinks($content);
 220
 221         $options = array('is_local' => Notice::LOCAL_PUBLIC,
 222                          'uri' => $sourceUri,
 223                          'rendered' => $rendered,
 224                          'replies' => array(),
 225                          'groups' => array(),
 226                          'tags' => array(),
 227                          'urls' => array(),
 228                          'distribute' => false);
 229
 230         // Check for optional attributes...
 231
 232         if (!empty($activity->time)) {
 233             $options['created'] = common_sql_date($activity->time);
 234         }
 235
 236         if ($activity->context) {
 237             // Any individual or group attn: targets?
 238
 239             list($options['groups'], $options['replies']) = $this->filterAttention($activity->context->attention);
 240
 241             // Maintain direct reply associations
 242             // @fixme what about conversation ID?
 243             if (!empty($activity->context->replyToID)) {
 244                 $orig = Notice::getKV('uri', $activity->context->replyToID);
 245                 if ($orig instanceof Notice) {
 246                     $options['reply_to'] = $orig->id;
 247                 }
 248             }
 249
 250             $location = $activity->context->location;
 251
 252             if ($location) {
 253                 $options['lat'] = $location->lat;
 254                 $options['lon'] = $location->lon;
 255                 if ($location->location_id) {
 256                     $options['location_ns'] = $location->location_ns;
 257                     $options['location_id'] = $location->location_id;
 258                 }
 259             }
 260         }
 261
 262         // Atom categories <-> hashtags
 263
 264         foreach ($activity->categories as $cat) {
 265             if ($cat->term) {
 266                 $term = common_canonical_tag($cat->term);
 267                 if ($term) {
 268                     $options['tags'][] = $term;
 269                 }
 270             }
 271         }
 272
 273         // Atom enclosures -> attachment URLs
 274         foreach ($activity->enclosures as $href) {
 275             // @fixme save these locally or....?
 276             $options['urls'][] = $href;
 277         }
 278
 279         common_log(LOG_INFO, "Saving notice {$options['uri']}");
 280
 281         $saved = Notice::saveNew($user->id,
 282                                  $content,
 283                                  'restore', // TODO: restore the actual source
 284                                  $options);
 285
 286         return $saved;
 287     }
 288
 289     protected function filterAttention(array $attn)
 290     {
 291         $groups = array();  // TODO: context->attention
 292         $replies = array(); // TODO: context->attention
 293
 294         foreach ($attn as $recipient=>$type) {
 295
 296             // Is the recipient a local user?
 297
 298             $user = User::getKV('uri', $recipient);
 299
 300             if ($user instanceof User) {
 301                 // TODO: @fixme sender verification, spam etc?
 302                 $replies[] = $recipient;
 303                 continue;
 304             }
 305
 306             // Is the recipient a remote group?
 307             $oprofile = Ostatus_profile::ensureProfileURI($recipient);
 308
 309             if ($oprofile instanceof Ostatus_profile) {
 310                 if (!$oprofile->isGroup()) {
 311                     // may be canonicalized or something
 312                     $replies[] = $oprofile->uri;
 313                 }
 314                 continue;
 315             }
 316
 317             // Is the recipient a local group?
 318             // TODO: @fixme uri on user_group isn't reliable yet
 319             // $group = User_group::getKV('uri', $recipient);
 320             $id = OStatusPlugin::localGroupFromUrl($recipient);
 321
 322             if ($id) {
 323                 $group = User_group::getKV('id', $id);
 324                 if ($group instanceof User_group) {
 325                     // Deliver to all members of this local group if allowed.
 326                     $profile = Profile::getKV('id', $recipient);
 327
 328                     if (($profile instanceof Profile) && ($profile->isMember($group))) {
 329                         $groups[] = $group->id;
 330                     } else {
 331                         common_log(LOG_INFO, "Skipping reply to local group {$group->nickname} as sender {$profile->id} is not a member");
 332                     }
 333                     continue;
 334                 } else {
 335                     common_log(LOG_INFO, "Skipping reply to bogus group $recipient");
 336                 }
 337             }
 338         }
 339
 340         return array($groups, $replies);
 341     }
 342
 343
 344     function purify($content)
 345     {
 346         require_once INSTALLDIR.'/extlib/htmLawed/htmLawed.php';
 347
 348         $config = array('safe' => 1,
 349                         'deny_attribute' => 'id,style,on*');
 350
 351         return htmLawed($content, $config);
 352     }
 353 }