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('STATUSNET') && !defined('LACONICA')) { 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 Action
  28 {
  29     function isReadOnly($args)
  30     {
  31         return true;
  32     }
  33
  34     function prepare($args)
  35     {
  36         parent::prepare($args);
  37
  38         $nickname_arg = $this->arg('nickname');
  39
  40         if (empty($nickname_arg)) {
  41             // TRANS: Client error displayed when requesting Friends of a Friend feed without providing a user nickname.
  42             $this->clientError(_('No such user.'), 404);
  43         }
  44
  45         $this->nickname = common_canonical_nickname($nickname_arg);
  46
  47         // Permanent redirect on non-canonical nickname
  48
  49         if ($nickname_arg != $this->nickname) {
  50             common_redirect(common_local_url('foaf',
  51                                              array('nickname' => $this->nickname)),
  52                             301);
  53         }
  54
  55         $this->user = User::getKV('nickname', $this->nickname);
  56
  57         if (!$this->user) {
  58             // TRANS: Client error displayed when requesting Friends of a Friend feed for an object that is not a user.
  59             $this->clientError(_('No such user.'), 404);
  60         }
  61
  62         $this->profile = $this->user->getProfile();
  63
  64         if (!$this->profile) {
  65             // TRANS: Error message displayed when referring to a user without a profile.
  66             $this->serverError(_('User has no profile.'), 500);
  67         }
  68
  69         return true;
  70     }
  71
  72     function handle($args)
  73     {
  74         parent::handle($args);
  75
  76         header('Content-Type: application/rdf+xml');
  77
  78         $this->startXML();
  79         $this->elementStart('rdf:RDF', array('xmlns:rdf' =>
  80                                               'http://www.w3.org/1999/02/22-rdf-syntax-ns#',
  81                                               'xmlns:rdfs' =>
  82                                               'http://www.w3.org/2000/01/rdf-schema#',
  83                                               'xmlns:geo' =>
  84                                               'http://www.w3.org/2003/01/geo/wgs84_pos#',
  85                                               'xmlns:bio' =>
  86                                               'http://purl.org/vocab/bio/0.1/',
  87                                               'xmlns:sioc' =>
  88                                               'http://rdfs.org/sioc/ns#',
  89                                               'xmlns' => 'http://xmlns.com/foaf/0.1/'));
  90
  91         // This is the document about the user
  92
  93         $this->showPpd('', $this->user->uri);
  94
  95         // Would be nice to tell if they were a Person or not (e.g. a #person usertag?)
  96         $this->elementStart('Agent', array('rdf:about' =>
  97                                              $this->user->uri));
  98         if ($this->user->email) {
  99             $this->element('mbox_sha1sum', null, sha1('mailto:' . $this->user->email));
 100         }
 101         if ($this->profile->fullname) {
 102             $this->element('name', null, $this->profile->fullname);
 103         }
 104         if ($this->profile->homepage) {
 105             $this->element('homepage', array('rdf:resource' => $this->profile->homepage));
 106         }
 107         if ($this->profile->profileurl) {
 108             $this->element('weblog', array('rdf:resource' => $this->profile->profileurl));
 109         }
 110         if ($this->profile->bio) {
 111             $this->element('bio:olb', null, $this->profile->bio);
 112         }
 113
 114         $location = $this->profile->getLocation();
 115         if ($location) {
 116             $attr = array();
 117             if ($location->getRdfURL()) {
 118                 $attr['rdf:about'] = $location->getRdfURL();
 119             }
 120             $location_name = $location->getName();
 121
 122             $this->elementStart('based_near');
 123             $this->elementStart('geo:SpatialThing', $attr);
 124             if ($location_name) {
 125                 $this->element('name', null, $location_name);
 126             }
 127             if ($location->lat) {
 128                 $this->element('geo:lat', null, $location->lat);
 129             }
 130             if ($location->lon) {
 131                 $this->element('geo:long', null, $location->lon);
 132             }
 133             if ($location->getURL()) {
 134                 $this->element('page', array('rdf:resource'=>$location->getURL()));
 135             }
 136             $this->elementEnd('geo:SpatialThing');
 137             $this->elementEnd('based_near');
 138         }
 139
 140         try {
 141             $avatar = Avatar::getUploaded($this->profile);
 142             $this->elementStart('img');
 143             $this->elementStart('Image', array('rdf:about' => $avatar->displayUrl()));
 144             foreach (array(AVATAR_PROFILE_SIZE, AVATAR_STREAM_SIZE, AVATAR_MINI_SIZE) as $size) {
 145                 try {
 146                     $scaled = $this->profile->getAvatar($size);
 147                     $this->elementStart('thumbnail');
 148                     $this->element('Image', array('rdf:about' => $scaled->displayUrl()));
 149                     $this->elementEnd('thumbnail');
 150                 } catch (Exception $e) {
 151                     // This avatar did not exist
 152                 }
 153             }
 154             $this->elementEnd('Image');
 155             $this->elementEnd('img');
 156         } catch (NoAvatarException $e) {
 157             // No avatar for this user!
 158         }
 159
 160         $person = $this->showMicrobloggingAccount($this->profile,
 161                                      common_root_url(), $this->user->uri,
 162                                      /*$fetchSubscriptions*/true,
 163                                      /*$isSubscriber*/false);
 164
 165         // Get people who subscribe to user
 166
 167         $sub = new Subscription();
 168         $sub->subscribed = $this->profile->id;
 169         $sub->whereAdd('subscriber != subscribed');
 170
 171         if ($sub->find()) {
 172             while ($sub->fetch()) {
 173                 $profile = Profile::getKV('id', $sub->subscriber);
 174                 if (empty($profile)) {
 175                     common_debug('Got a bad subscription: '.print_r($sub,true));
 176                     continue;
 177                 }
 178                 $other_uri = $profile->getUri();
 179                 if (array_key_exists($other_uri, $person)) {
 180                     $person[$other_uri][0] = BOTH;
 181                 } else {
 182                     $person[$other_uri] = array(LISTENER,
 183                                                 $profile->id,
 184                                                 $profile->nickname,
 185                                                 $profile->isLocal() ? 'local' : 'remote');
 186                 }
 187                 unset($profile);
 188             }
 189         }
 190
 191         unset($sub);
 192
 193         foreach ($person as $uri => $p) {
 194             list($type, $id, $nickname, $local) = $p;
 195             if ($type == BOTH) {
 196                 $this->element('knows', array('rdf:resource' => $uri));
 197             }
 198         }
 199
 200         $this->elementEnd('Agent');
 201
 202
 203         foreach ($person as $uri => $p) {
 204             $foaf_url = null;
 205             list($type, $id, $nickname, $local) = $p;
 206             if ($local == 'local') {
 207                 $foaf_url = common_local_url('foaf', array('nickname' => $nickname));
 208             }
 209             $profile = Profile::getKV($id);
 210             $this->elementStart('Agent', array('rdf:about' => $uri));
 211             if ($type == BOTH) {
 212                 $this->element('knows', array('rdf:resource' => $this->user->uri));
 213             }
 214             $this->showMicrobloggingAccount($profile,
 215                                    ($local == 'local') ? common_root_url() : null,
 216                                    $uri,
 217                                    /*$fetchSubscriptions*/false,
 218                                    /*$isSubscriber*/($type == LISTENER || $type == BOTH));
 219             if ($foaf_url) {
 220                 $this->element('rdfs:seeAlso', array('rdf:resource' => $foaf_url));
 221             }
 222             $this->elementEnd('Agent');
 223             if ($foaf_url) {
 224                 $this->showPpd($foaf_url, $uri);
 225             }
 226             $profile->free();
 227             $profile = null;
 228             unset($profile);
 229         }
 230
 231         $this->elementEnd('rdf:RDF');
 232         $this->endXML();
 233     }
 234
 235     function showPpd($foaf_url, $person_uri)
 236     {
 237         $this->elementStart('PersonalProfileDocument', array('rdf:about' => $foaf_url));
 238         $this->element('maker', array('rdf:resource' => $person_uri));
 239         $this->element('primaryTopic', array('rdf:resource' => $person_uri));
 240         $this->elementEnd('PersonalProfileDocument');
 241     }
 242
 243     /**
 244      * Output FOAF <account> bit for the given profile.
 245      *
 246      * @param Profile $profile
 247      * @param mixed $service Root URL of this StatusNet instance for a local
 248      *                       user, otherwise null.
 249      * @param mixed $useruri URI string for the referenced profile..
 250      * @param boolean $fetchSubscriptions Should we load and list all their subscriptions?
 251      * @param boolean $isSubscriber if not fetching subs, we can still mark the user as following the current page.
 252      *
 253      * @return array if $fetchSubscribers is set, return a list of info on those
 254      *               subscriptions.
 255      */
 256     function showMicrobloggingAccount($profile, $service=null, $useruri=null, $fetchSubscriptions=false, $isSubscriber=false)
 257     {
 258         $attr = array();
 259         if ($useruri) {
 260             $attr['rdf:about'] = $useruri . '#acct';
 261         }
 262
 263         // Their account
 264         $this->elementStart('account');
 265         $this->elementStart('OnlineAccount', $attr);
 266         if ($service) {
 267             $this->element('accountServiceHomepage', array('rdf:resource' =>
 268                                                            $service));
 269         }
 270         $this->element('accountName', null, $profile->nickname);
 271         $this->element('accountProfilePage', array('rdf:resource' => $profile->profileurl));
 272         if ($useruri) {
 273             $this->element('sioc:account_of', array('rdf:resource'=>$useruri));
 274         }
 275
 276         $person = array();
 277
 278         if ($fetchSubscriptions) {
 279             // Get people user is subscribed to
 280             $sub = new Subscription();
 281             $sub->subscriber = $profile->id;
 282             $sub->whereAdd('subscriber != subscribed');
 283
 284             if ($sub->find()) {
 285                 while ($sub->fetch()) {
 286                     $profile = Profile::getKV('id', $sub->subscribed);
 287                     if (empty($profile)) {
 288                         common_debug('Got a bad subscription: '.print_r($sub,true));
 289                         continue;
 290                     }
 291                     $other_uri = $profile->getUri();
 292                     $this->element('sioc:follows', array('rdf:resource' => $other_uri.'#acct'));
 293                     $person[$other_uri] = array(LISTENEE,
 294                                                 $profile->id,
 295                                                 $profile->nickname,
 296                                                 $profile->isLocal() ? 'local' : 'remote');
 297                     unset($profile);
 298                 }
 299             }
 300
 301             unset($sub);
 302         } else if ($isSubscriber) {
 303             // Just declare that they follow the user whose FOAF we're showing.
 304             $this->element('sioc:follows', array('rdf:resource' => $this->user->uri . '#acct'));
 305         }
 306
 307         $this->elementEnd('OnlineAccount');
 308         $this->elementEnd('account');
 309
 310         return $person;
 311     }
 312 }