actions/foaf.php

   1 <?php
   2 /*
   3  * StatusNet - the distributed open-source microblogging tool
   4  * Copyright (C) 2008, 2009, StatusNet, 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 if (!defined('GNUSOCIAL')) { exit(1); }
  21
  22 define('LISTENER', 1);
  23 define('LISTENEE', -1);
  24 define('BOTH', 0);
  25
  26 // @todo XXX: Documentation missing.
  27 class FoafAction extends ManagedAction
  28 {
  29     function isReadOnly($args)
  30     {
  31         return true;
  32     }
  33
  34     protected function doPreparation()
  35     {
  36         $nickname_arg = $this->arg('nickname');
  37
  38         if (empty($nickname_arg)) {
  39             // TRANS: Client error displayed when requesting Friends of a Friend feed without providing a user nickname.
  40             $this->clientError(_('No such user.'), 404);
  41         }
  42
  43         $this->nickname = common_canonical_nickname($nickname_arg);
  44
  45         // Permanent redirect on non-canonical nickname
  46
  47         if ($nickname_arg != $this->nickname) {
  48             common_redirect(common_local_url('foaf',
  49                                              array('nickname' => $this->nickname)),
  50                             301);
  51         }
  52
  53         $this->user = User::getKV('nickname', $this->nickname);
  54
  55         if (!$this->user) {
  56             // TRANS: Client error displayed when requesting Friends of a Friend feed for an object that is not a user.
  57             $this->clientError(_('No such user.'), 404);
  58         }
  59
  60         $this->profile = $this->user->getProfile();
  61
  62         if (!$this->profile) {
  63             // TRANS: Error message displayed when referring to a user without a profile.
  64             $this->serverError(_('User has no profile.'), 500);
  65         }
  66
  67         return true;
  68     }
  69
  70     public function showPage()
  71     {
  72         header('Content-Type: application/rdf+xml');
  73
  74         $this->startXML();
  75         $this->elementStart('rdf:RDF', array('xmlns:rdf' =>
  76                                               'http://www.w3.org/1999/02/22-rdf-syntax-ns#',
  77                                               'xmlns:rdfs' =>
  78                                               'http://www.w3.org/2000/01/rdf-schema#',
  79                                               'xmlns:geo' =>
  80                                               'http://www.w3.org/2003/01/geo/wgs84_pos#',
  81                                               'xmlns:bio' =>
  82                                               'http://purl.org/vocab/bio/0.1/',
  83                                               'xmlns:sioc' =>
  84                                               'http://rdfs.org/sioc/ns#',
  85                                               'xmlns' => 'http://xmlns.com/foaf/0.1/'));
  86
  87         // This is the document about the user
  88
  89         $this->showPpd('', $this->user->getUri());
  90
  91         // Would be nice to tell if they were a Person or not (e.g. a #person usertag?)
  92         $this->elementStart('Agent', array('rdf:about' => $this->user->getUri()));
  93         if ($this->user->email) {
  94             $this->element('mbox_sha1sum', null, sha1('mailto:' . $this->user->email));
  95         }
  96         if ($this->profile->fullname) {
  97             $this->element('name', null, $this->profile->fullname);
  98         }
  99         if ($this->profile->homepage) {
 100             $this->element('homepage', array('rdf:resource' => $this->profile->homepage));
 101         }
 102         if ($this->profile->profileurl) {
 103             $this->element('weblog', array('rdf:resource' => $this->profile->profileurl));
 104         }
 105         if ($this->profile->bio) {
 106             $this->element('bio:olb', null, $this->profile->bio);
 107         }
 108
 109         $location = $this->profile->getLocation();
 110         if ($location) {
 111             $attr = array();
 112             if ($location->getRdfURL()) {
 113                 $attr['rdf:about'] = $location->getRdfURL();
 114             }
 115             $location_name = $location->getName();
 116
 117             $this->elementStart('based_near');
 118             $this->elementStart('geo:SpatialThing', $attr);
 119             if ($location_name) {
 120                 $this->element('name', null, $location_name);
 121             }
 122             if ($location->lat) {
 123                 $this->element('geo:lat', null, $location->lat);
 124             }
 125             if ($location->lon) {
 126                 $this->element('geo:long', null, $location->lon);
 127             }
 128             if ($location->getURL()) {
 129                 $this->element('page', array('rdf:resource'=>$location->getURL()));
 130             }
 131             $this->elementEnd('geo:SpatialThing');
 132             $this->elementEnd('based_near');
 133         }
 134
 135         try {
 136             $avatar = Avatar::getUploaded($this->profile);
 137             $this->elementStart('img');
 138             $this->elementStart('Image', array('rdf:about' => $avatar->displayUrl()));
 139             foreach (array(AVATAR_PROFILE_SIZE, AVATAR_STREAM_SIZE, AVATAR_MINI_SIZE) as $size) {
 140                 try {
 141                     $scaled = $this->profile->getAvatar($size);
 142                     $this->elementStart('thumbnail');
 143                     $this->element('Image', array('rdf:about' => $scaled->displayUrl()));
 144                     $this->elementEnd('thumbnail');
 145                 } catch (Exception $e) {
 146                     // This avatar did not exist
 147                 }
 148             }
 149             $this->elementEnd('Image');
 150             $this->elementEnd('img');
 151         } catch (NoAvatarException $e) {
 152             // No avatar for this user!
 153         }
 154
 155         $person = $this->showMicrobloggingAccount($this->profile,
 156                                      common_root_url(), $this->user->getUri(),
 157                                      /*$fetchSubscriptions*/true,
 158                                      /*$isSubscriber*/false);
 159
 160         // Get people who subscribe to user
 161
 162         $sub = new Subscription();
 163         $sub->subscribed = $this->profile->id;
 164         $sub->whereAdd('subscriber != subscribed');
 165
 166         if ($sub->find()) {
 167             while ($sub->fetch()) {
 168                 $profile = Profile::getKV('id', $sub->subscriber);
 169                 if (!$profile instanceof Profile) {
 170                     common_debug('Got a bad subscription: '.print_r($sub,true));
 171                     continue;
 172                 }
 173                 $other_uri = $profile->getUri();
 174                 if (array_key_exists($other_uri, $person)) {
 175                     $person[$other_uri][0] = BOTH;
 176                 } else {
 177                     $person[$other_uri] = array(LISTENER,
 178                                                 $profile->id,
 179                                                 $profile->nickname,
 180                                                 $profile->isLocal() ? 'local' : 'remote');
 181                 }
 182                 unset($profile);
 183             }
 184         }
 185
 186         unset($sub);
 187
 188         foreach ($person as $uri => $p) {
 189             list($type, $id, $nickname, $local) = $p;
 190             if ($type == BOTH) {
 191                 $this->element('knows', array('rdf:resource' => $uri));
 192             }
 193         }
 194
 195         $this->elementEnd('Agent');
 196
 197
 198         foreach ($person as $uri => $p) {
 199             $foaf_url = null;
 200             list($type, $id, $nickname, $local) = $p;
 201             if ($local == 'local') {
 202                 $foaf_url = common_local_url('foaf', array('nickname' => $nickname));
 203             }
 204             $profile = Profile::getKV($id);
 205             $this->elementStart('Agent', array('rdf:about' => $uri));
 206             if ($type == BOTH) {
 207                 $this->element('knows', array('rdf:resource' => $this->user->getUri()));
 208             }
 209             $this->showMicrobloggingAccount($profile,
 210                                    ($local == 'local') ? common_root_url() : null,
 211                                    $uri,
 212                                    /*$fetchSubscriptions*/false,
 213                                    /*$isSubscriber*/($type == LISTENER || $type == BOTH));
 214             if ($foaf_url) {
 215                 $this->element('rdfs:seeAlso', array('rdf:resource' => $foaf_url));
 216             }
 217             $this->elementEnd('Agent');
 218             if ($foaf_url) {
 219                 $this->showPpd($foaf_url, $uri);
 220             }
 221             $profile->free();
 222             $profile = null;
 223             unset($profile);
 224         }
 225
 226         $this->elementEnd('rdf:RDF');
 227         $this->endXML();
 228     }
 229
 230     function showPpd($foaf_url, $person_uri)
 231     {
 232         $this->elementStart('PersonalProfileDocument', array('rdf:about' => $foaf_url));
 233         $this->element('maker', array('rdf:resource' => $person_uri));
 234         $this->element('primaryTopic', array('rdf:resource' => $person_uri));
 235         $this->elementEnd('PersonalProfileDocument');
 236     }
 237
 238     /**
 239      * Output FOAF <account> bit for the given profile.
 240      *
 241      * @param Profile $profile
 242      * @param mixed $service Root URL of this StatusNet instance for a local
 243      *                       user, otherwise null.
 244      * @param mixed $useruri URI string for the referenced profile..
 245      * @param boolean $fetchSubscriptions Should we load and list all their subscriptions?
 246      * @param boolean $isSubscriber if not fetching subs, we can still mark the user as following the current page.
 247      *
 248      * @return array if $fetchSubscribers is set, return a list of info on those
 249      *               subscriptions.
 250      */
 251     function showMicrobloggingAccount($profile, $service=null, $useruri=null, $fetchSubscriptions=false, $isSubscriber=false)
 252     {
 253         $attr = array();
 254         if ($useruri) {
 255             $attr['rdf:about'] = $useruri . '#acct';
 256         }
 257
 258         // Their account
 259         $this->elementStart('account');
 260         $this->elementStart('OnlineAccount', $attr);
 261         if ($service) {
 262             $this->element('accountServiceHomepage', array('rdf:resource' =>
 263                                                            $service));
 264         }
 265         $this->element('accountName', null, $profile->nickname);
 266         $this->element('accountProfilePage', array('rdf:resource' => $profile->profileurl));
 267         if ($useruri) {
 268             $this->element('sioc:account_of', array('rdf:resource'=>$useruri));
 269         }
 270
 271         $person = array();
 272
 273         if ($fetchSubscriptions) {
 274             // Get people user is subscribed to
 275             $sub = new Subscription();
 276             $sub->subscriber = $profile->id;
 277             $sub->whereAdd('subscriber != subscribed');
 278
 279             if ($sub->find()) {
 280                 while ($sub->fetch()) {
 281                     $profile = Profile::getKV('id', $sub->subscribed);
 282                     if (empty($profile)) {
 283                         common_debug('Got a bad subscription: '.print_r($sub,true));
 284                         continue;
 285                     }
 286                     $other_uri = $profile->getUri();
 287                     $this->element('sioc:follows', array('rdf:resource' => $other_uri.'#acct'));
 288                     $person[$other_uri] = array(LISTENEE,
 289                                                 $profile->id,
 290                                                 $profile->nickname,
 291                                                 $profile->isLocal() ? 'local' : 'remote');
 292                     unset($profile);
 293                 }
 294             }
 295
 296             unset($sub);
 297         } else if ($isSubscriber) {
 298             // Just declare that they follow the user whose FOAF we're showing.
 299             $this->element('sioc:follows', array('rdf:resource' => $this->user->getUri() . '#acct'));
 300         }
 301
 302         $this->elementEnd('OnlineAccount');
 303         $this->elementEnd('account');
 304
 305         return $person;
 306     }
 307 }