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