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 isReadOnly()
  29     {
  30         return true;
  31     }
  32
  33     function prepare($args)
  34     {
  35         parent::prepare($args);
  36
  37         $nickname_arg = $this->arg('nickname');
  38
  39         if (empty($nickname_arg)) {
  40             $this->clientError(_('No such user.'), 404);
  41             return false;
  42         }
  43
  44         $this->nickname = common_canonical_nickname($nickname_arg);
  45
  46         // Permanent redirect on non-canonical nickname
  47
  48         if ($nickname_arg != $this->nickname) {
  49             common_redirect(common_local_url('foaf',
  50                                              array('nickname' => $this->nickname)),
  51                             301);
  52             return false;
  53         }
  54
  55         $this->user = User::staticGet('nickname', $this->nickname);
  56
  57         if (!$this->user) {
  58             $this->clientError(_('No such user.'), 404);
  59             return false;
  60         }
  61
  62         $this->profile = $this->user->getProfile();
  63
  64         if (!$this->profile) {
  65             $this->serverError(_('User has no profile.'), 500);
  66             return false;
  67         }
  68
  69         return true;
  70     }
  71
  72     function handle($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' => 'http://xmlns.com/foaf/0.1/'));
  86
  87         // This is the document about the user
  88
  89         $this->showPpd('', $this->user->uri);
  90
  91         // XXX: might not be a person
  92         $this->elementStart('Person', array('rdf:about' =>
  93                                              $this->user->uri));
  94         $this->element('mbox_sha1sum', null, sha1('mailto:' . $this->user->email));
  95         if ($this->profile->fullname) {
  96             $this->element('name', null, $this->profile->fullname);
  97         }
  98         if ($this->profile->homepage) {
  99             $this->element('homepage', array('rdf:resource' => $this->profile->homepage));
 100         }
 101         if ($this->profile->bio) {
 102             $this->element('rdfs:comment', null, $this->profile->bio);
 103         }
 104         // XXX: more structured location data
 105         if ($this->profile->location) {
 106             $this->elementStart('based_near');
 107             $this->elementStart('geo:SpatialThing');
 108             $this->element('name', null, $this->profile->location);
 109             $this->elementEnd('geo:SpatialThing');
 110             $this->elementEnd('based_near');
 111         }
 112
 113         $this->showMicrobloggingAccount($this->profile, common_root_url());
 114
 115         $avatar = $this->profile->getOriginalAvatar();
 116
 117         if ($avatar) {
 118             $this->elementStart('img');
 119             $this->elementStart('Image', array('rdf:about' => $avatar->url));
 120             foreach (array(AVATAR_PROFILE_SIZE, AVATAR_STREAM_SIZE, AVATAR_MINI_SIZE) as $size) {
 121                 $scaled = $this->profile->getAvatar($size);
 122                 if (!$scaled->original) { // sometimes the original has one of our scaled sizes
 123                     $this->elementStart('thumbnail');
 124                     $this->element('Image', array('rdf:about' => $scaled->url));
 125                     $this->elementEnd('thumbnail');
 126                 }
 127             }
 128             $this->elementEnd('Image');
 129             $this->elementEnd('img');
 130         }
 131
 132         // Get people user is subscribed to
 133
 134         $person = array();
 135
 136         $sub = new Subscription();
 137         $sub->subscriber = $this->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->subscribed);
 144                 } else {
 145                     $other = User::staticGet('id', $sub->subscribed);
 146                 }
 147                 if (!$other) {
 148                     common_debug('Got a bad subscription: '.print_r($sub,true));
 149                     continue;
 150                 }
 151                 $this->element('knows', array('rdf:resource' => $other->uri));
 152                 $person[$other->uri] = array(LISTENEE, $other);
 153             }
 154         }
 155
 156         // Get people who subscribe to user
 157
 158         $sub = new Subscription();
 159         $sub->subscribed = $this->profile->id;
 160         $sub->whereAdd('subscriber != subscribed');
 161
 162         if ($sub->find()) {
 163             while ($sub->fetch()) {
 164                 if ($sub->token) {
 165                     $other = Remote_profile::staticGet('id', $sub->subscriber);
 166                 } else {
 167                     $other = User::staticGet('id', $sub->subscriber);
 168                 }
 169                 if (!$other) {
 170                     common_debug('Got a bad subscription: '.print_r($sub,true));
 171                     continue;
 172                 }
 173                 if (array_key_exists($other->uri, $person)) {
 174                     $person[$other->uri][0] = BOTH;
 175                 } else {
 176                     $person[$other->uri] = array(LISTENER, $other);
 177                 }
 178             }
 179         }
 180
 181         $this->elementEnd('Person');
 182
 183         foreach ($person as $uri => $p) {
 184             $foaf_url = null;
 185             if ($p[1] instanceof User) {
 186                 $foaf_url = common_local_url('foaf', array('nickname' => $p[1]->nickname));
 187             }
 188             $this->profile = Profile::staticGet($p[1]->id);
 189             $this->elementStart('Person', array('rdf:about' => $uri));
 190             if ($p[0] == LISTENER || $p[0] == BOTH) {
 191                 $this->element('knows', array('rdf:resource' => $this->user->uri));
 192             }
 193             $this->showMicrobloggingAccount($this->profile, ($p[1] instanceof User) ?
 194                                               common_root_url() : null);
 195             if ($foaf_url) {
 196                 $this->element('rdfs:seeAlso', array('rdf:resource' => $foaf_url));
 197             }
 198             $this->elementEnd('Person');
 199             if ($foaf_url) {
 200                 $this->showPpd($foaf_url, $uri);
 201             }
 202         }
 203
 204         $this->elementEnd('rdf:RDF');
 205         $this->endXML();
 206     }
 207
 208     function showPpd($foaf_url, $person_uri)
 209     {
 210         $this->elementStart('PersonalProfileDocument', array('rdf:about' => $foaf_url));
 211         $this->element('maker', array('rdf:resource' => $person_uri));
 212         $this->element('primaryTopic', array('rdf:resource' => $person_uri));
 213         $this->elementEnd('PersonalProfileDocument');
 214     }
 215
 216     function showMicrobloggingAccount($profile, $service=null)
 217     {
 218         // Their account
 219         $this->elementStart('holdsAccount');
 220         $this->elementStart('OnlineAccount');
 221         if ($service) {
 222             $this->element('accountServiceHomepage', array('rdf:resource' =>
 223                                                            $service));
 224         }
 225         $this->element('accountName', null, $profile->nickname);
 226         $this->element('homepage', array('rdf:resource' => $profile->profileurl));
 227         $this->elementEnd('OnlineAccount');
 228         $this->elementEnd('holdsAccount');
 229     }
 230 }