activityimporter.php 11.4 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65
<?php
/**
 * StatusNet - the distributed open-source microblogging tool
 * Copyright (C) 2010, StatusNet, Inc.
 *
 * class to import activities as part of a user's timeline
 * 
 * PHP version 5
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * @category  Cache
 * @package   StatusNet
 * @author    Evan Prodromou <evan@status.net>
 * @copyright 2010 StatusNet, Inc.
 * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
 * @link      http://status.net/
 */

if (!defined('STATUSNET')) {
    // This check helps protect against security problems;
    // your code file can't be executed directly from the web.
    exit(1);
}

/**
 * Class comment
 *
 * @category  General
 * @package   StatusNet
 * @author    Evan Prodromou <evan@status.net>
 * @copyright 2010 StatusNet, Inc.
 * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
 * @link      http://status.net/
 */

class ActivityImporter extends QueueHandler
{
    private $trusted = false;

    /**
     * Function comment
     *
     * @param
     *
     * @return
     */

    function handle($data)
    {
        list($user, $author, $activity, $trusted) = $data;

        $this->trusted = $trusted;

66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96
        $done = null;

        if (Event::handle('StartImportActivity', 
                          array($user, $author, $activity, $trusted, &$done))) {

            try {
                switch ($activity->verb) {
                case ActivityVerb::FOLLOW:
                    $this->subscribeProfile($user, $author, $activity);
                    break;
                case ActivityVerb::JOIN:
                    $this->joinGroup($user, $activity);
                    break;
                case ActivityVerb::POST:
                    $this->postNote($user, $author, $activity);
                    break;
                default:
                    throw new ClientException("Unknown verb: {$activity->verb}");
                }
                Event::handle('EndImportActivity', 
                              array($user, $author, $activity, $trusted));
                $done = true;
            } catch (ClientException $ce) {
                common_log(LOG_WARNING, $ce->getMessage());
                $done = true;
            } catch (ServerException $se) {
                common_log(LOG_ERR, $se->getMessage());
                $done = false;
            } catch (Exception $e) {
                common_log(LOG_ERR, $e->getMessage());
                $done = false;
97 98
            }
        }
99
        return $done;
100 101 102 103 104 105 106
    }
    
    function subscribeProfile($user, $author, $activity)
    {
        $profile = $user->getProfile();

        if ($activity->objects[0]->id == $author->id) {
107 108 109 110 111

            if (!$this->trusted) {
                throw new ClientException(_("Can't force subscription for untrusted user."));
            }

112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152
            $other = $activity->actor;
            $otherUser = User::staticGet('uri', $other->id);
            
            if (!empty($otherUser)) {
                $otherProfile = $otherUser->getProfile();
            } else {
                throw new Exception("Can't force remote user to subscribe.");
            }

            // XXX: don't do this for untrusted input!

            Subscription::start($otherProfile, $profile);

        } else if (empty($activity->actor) 
                   || $activity->actor->id == $author->id) {

            $other = $activity->objects[0];

            $otherProfile = Profile::fromUri($other->id);

            if (empty($otherProfile)) {
                throw new ClientException(_("Unknown profile."));
            }

            Subscription::start($profile, $otherProfile);
        } else {
            throw new Exception("This activity seems unrelated to our user.");
        }
    }

    function joinGroup($user, $activity)
    {
        // XXX: check that actor == subject

        $uri = $activity->objects[0]->id;

        $group = User_group::staticGet('uri', $uri);

        if (empty($group)) {
            $oprofile = Ostatus_profile::ensureActivityObjectProfile($activity->objects[0]);
            if (!$oprofile->isGroup()) {
153
                throw new ClientException("Remote profile is not a group!");
154 155 156 157 158 159
            }
            $group = $oprofile->localGroup();
        }

        assert(!empty($group));

160 161 162 163
        if ($user->isMember($group)) {
            throw new ClientException("User is already a member of this group.");
        }

164 165 166 167 168 169 170 171
        if (Event::handle('StartJoinGroup', array($group, $user))) {
            Group_member::join($group->id, $user->id);
            Event::handle('EndJoinGroup', array($group, $user));
        }
    }

    // XXX: largely cadged from Ostatus_profile::processNote()

172
    function postNote($user, $author, $activity)
173 174 175 176 177 178 179 180
    {
        $note = $activity->objects[0];

        $sourceUri = $note->id;

        $notice = Notice::staticGet('uri', $sourceUri);

        if (!empty($notice)) {
181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200
            
            common_log(LOG_INFO, "Notice {$sourceUri} already exists.");

            if ($this->trusted) {

                $profile = $notice->getProfile();

                $uri = $profile->getUri();

                if ($uri == $author->id) {
                    common_log(LOG_INFO, "Updating notice author from $author->id to $user->uri");
                    $orig = clone($notice);
                    $notice->profile_id = $user->id;
                    $notice->update($orig);
                    return;
                } else {
                    throw new ClientException(sprintf(_("Already know about notice %s and ".
                                                        " it's got a different author %s."),
                                                      $sourceUri, $uri));
                }
201 202
            } else {
                throw new ClientException("Not overwriting author info for non-trusted user.");
203
            }
204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232
        }

        // Use summary as fallback for content

        if (!empty($note->content)) {
            $sourceContent = $note->content;
        } else if (!empty($note->summary)) {
            $sourceContent = $note->summary;
        } else if (!empty($note->title)) {
            $sourceContent = $note->title;
        } else {
            // @fixme fetch from $sourceUrl?
            // @todo i18n FIXME: use sprintf and add i18n.
            throw new ClientException("No content for notice {$sourceUri}.");
        }

        // Get (safe!) HTML and text versions of the content

        $rendered = $this->purify($sourceContent);
        $content = html_entity_decode(strip_tags($rendered), ENT_QUOTES, 'UTF-8');

        $shortened = $user->shortenLinks($content);

        $options = array('is_local' => Notice::LOCAL_PUBLIC,
                         'uri' => $sourceUri,
                         'rendered' => $rendered,
                         'replies' => array(),
                         'groups' => array(),
                         'tags' => array(),
233 234
                         'urls' => array(),
                         'distribute' => false);
235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285

        // Check for optional attributes...

        if (!empty($activity->time)) {
            $options['created'] = common_sql_date($activity->time);
        }

        if ($activity->context) {
            // Any individual or group attn: targets?

            list($options['groups'], $options['replies']) = $this->filterAttention($activity->context->attention);

            // Maintain direct reply associations
            // @fixme what about conversation ID?
            if (!empty($activity->context->replyToID)) {
                $orig = Notice::staticGet('uri',
                                          $activity->context->replyToID);
                if (!empty($orig)) {
                    $options['reply_to'] = $orig->id;
                }
            }

            $location = $activity->context->location;

            if ($location) {
                $options['lat'] = $location->lat;
                $options['lon'] = $location->lon;
                if ($location->location_id) {
                    $options['location_ns'] = $location->location_ns;
                    $options['location_id'] = $location->location_id;
                }
            }
        }

        // Atom categories <-> hashtags

        foreach ($activity->categories as $cat) {
            if ($cat->term) {
                $term = common_canonical_tag($cat->term);
                if ($term) {
                    $options['tags'][] = $term;
                }
            }
        }

        // Atom enclosures -> attachment URLs
        foreach ($activity->enclosures as $href) {
            // @fixme save these locally or....?
            $options['urls'][] = $href;
        }

286 287
        common_log(LOG_INFO, "Saving notice {$options['uri']}");

288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351
        $saved = Notice::saveNew($user->id,
                                 $content,
                                 'restore', // TODO: restore the actual source
                                 $options);

        return $saved;
    }

    function filterAttention($attn)
    {
        $groups = array();
        $replies = array();

        foreach (array_unique($attn) as $recipient) {

            // Is the recipient a local user?

            $user = User::staticGet('uri', $recipient);

            if ($user) {
                // @fixme sender verification, spam etc?
                $replies[] = $recipient;
                continue;
            }

            // Is the recipient a remote group?
            $oprofile = Ostatus_profile::ensureProfileURI($recipient);

            if ($oprofile) {
                if (!$oprofile->isGroup()) {
                    // may be canonicalized or something
                    $replies[] = $oprofile->uri;
                }
                continue;
            }

            // Is the recipient a local group?
            // @fixme uri on user_group isn't reliable yet
            // $group = User_group::staticGet('uri', $recipient);
            $id = OStatusPlugin::localGroupFromUrl($recipient);

            if ($id) {
                $group = User_group::staticGet('id', $id);
                if ($group) {
                    // Deliver to all members of this local group if allowed.
                    $profile = $sender->localProfile();
                    if ($profile->isMember($group)) {
                        $groups[] = $group->id;
                    } else {
                        common_log(LOG_INFO, "Skipping reply to local group {$group->nickname} as sender {$profile->id} is not a member");
                    }
                    continue;
                } else {
                    common_log(LOG_INFO, "Skipping reply to bogus group $recipient");
                }
            }
        }

        return array($groups, $replies);
    }
 

    function purify($content)
    {
352 353
        require_once INSTALLDIR.'/extlib/htmLawed/htmLawed.php';

354 355
        $config = array('safe' => 1,
                        'deny_attribute' => 'id,style,on*');
356

357 358 359
        return htmLawed($content, $config);
    }
}