actions/foaf.php

   1 <?php
   2 /*
   3  * Laconica - a distributed open-source microblogging tool
   4  * Copyright (C) 2008, Controlez-Vous, 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('LACONICA')) { exit(1); }
  21
  22 define('LISTENER', 1);
  23 define('LISTENEE', -1);
  24 define('BOTH', 0);
  25
  26 class FoafAction extends Action
  27 {
  28
  29     function isReadOnly()
  30     {
  31         return true;
  32     }
  33
  34     function handle($args)
  35     {
  36         parent::handle($args);
  37
  38         $nickname = $this->trimmed('nickname');
  39
  40         $user = User::staticGet('nickname', $nickname);
  41
  42         if (!$user) {
  43             $this->clientError(_('No such user.'), 404);
  44             return;
  45         }
  46
  47         $profile = $user->getProfile();
  48
  49         if (!$profile) {
  50             $this->serverError(_('User has no profile.'), 500);
  51             return;
  52         }
  53
  54         header('Content-Type: application/rdf+xml');
  55
  56         common_start_xml();
  57         $this->elementStart('rdf:RDF', array('xmlns:rdf' =>
  58                                               'http://www.w3.org/1999/02/22-rdf-syntax-ns#',
  59                                               'xmlns:rdfs' =>
  60                                               'http://www.w3.org/2000/01/rdf-schema#',
  61                                               'xmlns:geo' =>
  62                                               'http://www.w3.org/2003/01/geo/wgs84_pos#',
  63                                               'xmlns' => 'http://xmlns.com/foaf/0.1/'));
  64
  65         # This is the document about the user
  66
  67         $this->show_ppd('', $user->uri);
  68
  69         # XXX: might not be a person
  70         $this->elementStart('Person', array('rdf:about' =>
  71                                              $user->uri));
  72         $this->element('mbox_sha1sum', null, sha1('mailto:' . $user->email));
  73         if ($profile->fullname) {
  74             $this->element('name', null, $profile->fullname);
  75         }
  76         if ($profile->homepage) {
  77             $this->element('homepage', array('rdf:resource' => $profile->homepage));
  78         }
  79         if ($profile->bio) {
  80             $this->element('rdfs:comment', null, $profile->bio);
  81         }
  82         # XXX: more structured location data
  83         if ($profile->location) {
  84             $this->elementStart('based_near');
  85             $this->elementStart('geo:SpatialThing');
  86             $this->element('name', null, $profile->location);
  87             $this->elementEnd('geo:SpatialThing');
  88             $this->elementEnd('based_near');
  89         }
  90
  91         $this->show_microblogging_account($profile, common_root_url());
  92
  93         $avatar = $profile->getOriginalAvatar();
  94
  95         if ($avatar) {
  96             $this->elementStart('img');
  97             $this->elementStart('Image', array('rdf:about' => $avatar->url));
  98             foreach (array(AVATAR_PROFILE_SIZE, AVATAR_STREAM_SIZE, AVATAR_MINI_SIZE) as $size) {
  99                 $scaled = $profile->getAvatar($size);
 100                 if (!$scaled->original) { # sometimes the original has one of our scaled sizes
 101                     $this->elementStart('thumbnail');
 102                     $this->element('Image', array('rdf:about' => $scaled->url));
 103                     $this->elementEnd('thumbnail');
 104                 }
 105             }
 106             $this->elementEnd('Image');
 107             $this->elementEnd('img');
 108         }
 109
 110         # Get people user is subscribed to
 111
 112         $person = array();
 113
 114         $sub = new Subscription();
 115         $sub->subscriber = $profile->id;
 116         $sub->whereAdd('subscriber != subscribed');
 117
 118         if ($sub->find()) {
 119             while ($sub->fetch()) {
 120                 if ($sub->token) {
 121                     $other = Remote_profile::staticGet('id', $sub->subscribed);
 122                 } else {
 123                     $other = User::staticGet('id', $sub->subscribed);
 124                 }
 125                 if (!$other) {
 126                     common_debug('Got a bad subscription: '.print_r($sub,true));
 127                     continue;
 128                 }
 129                 $this->element('knows', array('rdf:resource' => $other->uri));
 130                 $person[$other->uri] = array(LISTENEE, $other);
 131             }
 132         }
 133
 134         # Get people who subscribe to user
 135
 136         $sub = new Subscription();
 137         $sub->subscribed = $profile->id;
 138         $sub->whereAdd('subscriber != subscribed');
 139
 140         if ($sub->find()) {
 141             while ($sub->fetch()) {
 142                 if ($sub->token) {
 143                     $other = Remote_profile::staticGet('id', $sub->subscriber);
 144                 } else {
 145                     $other = User::staticGet('id', $sub->subscriber);
 146                 }
 147                 if (!$other) {
 148                     common_debug('Got a bad subscription: '.print_r($sub,true));
 149                     continue;
 150                 }
 151                 if (array_key_exists($other->uri, $person)) {
 152                     $person[$other->uri][0] = BOTH;
 153                 } else {
 154                     $person[$other->uri] = array(LISTENER, $other);
 155                 }
 156             }
 157         }
 158
 159         $this->elementEnd('Person');
 160
 161         foreach ($person as $uri => $p) {
 162             $foaf_url = null;
 163             if ($p[1] instanceof User) {
 164                 $foaf_url = common_local_url('foaf', array('nickname' => $p[1]->nickname));
 165             }
 166             $profile = Profile::staticGet($p[1]->id);
 167             $this->elementStart('Person', array('rdf:about' => $uri));
 168             if ($p[0] == LISTENER || $p[0] == BOTH) {
 169                 $this->element('knows', array('rdf:resource' => $user->uri));
 170             }
 171             $this->show_microblogging_account($profile, ($p[1] instanceof User) ?
 172                                               common_root_url() : null);
 173             if ($foaf_url) {
 174                 $this->element('rdfs:seeAlso', array('rdf:resource' => $foaf_url));
 175             }
 176             $this->elementEnd('Person');
 177             if ($foaf_url) {
 178                 $this->show_ppd($foaf_url, $uri);
 179             }
 180         }
 181
 182         $this->elementEnd('rdf:RDF');
 183     }
 184
 185     function show_ppd($foaf_url, $person_uri)
 186     {
 187         $this->elementStart('PersonalProfileDocument', array('rdf:about' => $foaf_url));
 188         $this->element('maker', array('rdf:resource' => $person_uri));
 189         $this->element('primaryTopic', array('rdf:resource' => $person_uri));
 190         $this->elementEnd('PersonalProfileDocument');
 191     }
 192
 193     function show_microblogging_account($profile, $service=null)
 194     {
 195         # Their account
 196         $this->elementStart('holdsAccount');
 197         $this->elementStart('OnlineAccount');
 198         if ($service) {
 199             $this->element('accountServiceHomepage', array('rdf:resource' =>
 200                                                            $service));
 201         }
 202         $this->element('accountName', null, $profile->nickname);
 203         $this->element('homepage', array('rdf:resource' => $profile->profileurl));
 204         $this->elementEnd('OnlineAccount');
 205         $this->elementEnd('holdsAccount');
 206     }
 207 }