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         $this->nickname = $this->trimmed('nickname');
  37
  38         $this->user = User::staticGet('nickname', $this->nickname);
  39
  40         if (!$this->user) {
  41             $this->clientError(_('No such user.'), 404);
  42             return false;
  43         }
  44
  45         $this->profile = $this->user->getProfile();
  46
  47         if (!$this->profile) {
  48             $this->serverError(_('User has no profile.'), 500);
  49             return false;
  50         }
  51
  52         return true;
  53     }
  54
  55     function handle($args)
  56     {
  57         parent::handle($args);
  58
  59         header('Content-Type: application/rdf+xml');
  60
  61         $this->startXML();
  62         $this->elementStart('rdf:RDF', array('xmlns:rdf' =>
  63                                               'http://www.w3.org/1999/02/22-rdf-syntax-ns#',
  64                                               'xmlns:rdfs' =>
  65                                               'http://www.w3.org/2000/01/rdf-schema#',
  66                                               'xmlns:geo' =>
  67                                               'http://www.w3.org/2003/01/geo/wgs84_pos#',
  68                                               'xmlns' => 'http://xmlns.com/foaf/0.1/'));
  69
  70         // This is the document about the user
  71
  72         $this->showPpd('', $this->user->uri);
  73
  74         // XXX: might not be a person
  75         $this->elementStart('Person', array('rdf:about' =>
  76                                              $this->user->uri));
  77         $this->element('mbox_sha1sum', null, sha1('mailto:' . $this->user->email));
  78         if ($this->profile->fullname) {
  79             $this->element('name', null, $this->profile->fullname);
  80         }
  81         if ($this->profile->homepage) {
  82             $this->element('homepage', array('rdf:resource' => $this->profile->homepage));
  83         }
  84         if ($this->profile->bio) {
  85             $this->element('rdfs:comment', null, $this->profile->bio);
  86         }
  87         // XXX: more structured location data
  88         if ($this->profile->location) {
  89             $this->elementStart('based_near');
  90             $this->elementStart('geo:SpatialThing');
  91             $this->element('name', null, $this->profile->location);
  92             $this->elementEnd('geo:SpatialThing');
  93             $this->elementEnd('based_near');
  94         }
  95
  96         $this->showMicrobloggingAccount($this->profile, common_root_url());
  97
  98         $avatar = $this->profile->getOriginalAvatar();
  99
 100         if ($avatar) {
 101             $this->elementStart('img');
 102             $this->elementStart('Image', array('rdf:about' => $avatar->url));
 103             foreach (array(AVATAR_PROFILE_SIZE, AVATAR_STREAM_SIZE, AVATAR_MINI_SIZE) as $size) {
 104                 $scaled = $this->profile->getAvatar($size);
 105                 if (!$scaled->original) { // sometimes the original has one of our scaled sizes
 106                     $this->elementStart('thumbnail');
 107                     $this->element('Image', array('rdf:about' => $scaled->url));
 108                     $this->elementEnd('thumbnail');
 109                 }
 110             }
 111             $this->elementEnd('Image');
 112             $this->elementEnd('img');
 113         }
 114
 115         // Get people user is subscribed to
 116
 117         $person = array();
 118
 119         $sub = new Subscription();
 120         $sub->subscriber = $this->profile->id;
 121         $sub->whereAdd('subscriber != subscribed');
 122
 123         if ($sub->find()) {
 124             while ($sub->fetch()) {
 125                 if ($sub->token) {
 126                     $other = Remote_profile::staticGet('id', $sub->subscribed);
 127                 } else {
 128                     $other = User::staticGet('id', $sub->subscribed);
 129                 }
 130                 if (!$other) {
 131                     common_debug('Got a bad subscription: '.print_r($sub,true));
 132                     continue;
 133                 }
 134                 $this->element('knows', array('rdf:resource' => $other->uri));
 135                 $person[$other->uri] = array(LISTENEE, $other);
 136             }
 137         }
 138
 139         // Get people who subscribe to user
 140
 141         $sub = new Subscription();
 142         $sub->subscribed = $this->profile->id;
 143         $sub->whereAdd('subscriber != subscribed');
 144
 145         if ($sub->find()) {
 146             while ($sub->fetch()) {
 147                 if ($sub->token) {
 148                     $other = Remote_profile::staticGet('id', $sub->subscriber);
 149                 } else {
 150                     $other = User::staticGet('id', $sub->subscriber);
 151                 }
 152                 if (!$other) {
 153                     common_debug('Got a bad subscription: '.print_r($sub,true));
 154                     continue;
 155                 }
 156                 if (array_key_exists($other->uri, $person)) {
 157                     $person[$other->uri][0] = BOTH;
 158                 } else {
 159                     $person[$other->uri] = array(LISTENER, $other);
 160                 }
 161             }
 162         }
 163
 164         $this->elementEnd('Person');
 165
 166         foreach ($person as $uri => $p) {
 167             $foaf_url = null;
 168             if ($p[1] instanceof User) {
 169                 $foaf_url = common_local_url('foaf', array('nickname' => $p[1]->nickname));
 170             }
 171             $this->profile = Profile::staticGet($p[1]->id);
 172             $this->elementStart('Person', array('rdf:about' => $uri));
 173             if ($p[0] == LISTENER || $p[0] == BOTH) {
 174                 $this->element('knows', array('rdf:resource' => $this->user->uri));
 175             }
 176             $this->showMicrobloggingAccount($this->profile, ($p[1] instanceof User) ?
 177                                               common_root_url() : null);
 178             if ($foaf_url) {
 179                 $this->element('rdfs:seeAlso', array('rdf:resource' => $foaf_url));
 180             }
 181             $this->elementEnd('Person');
 182             if ($foaf_url) {
 183                 $this->showPpd($foaf_url, $uri);
 184             }
 185         }
 186
 187         $this->elementEnd('rdf:RDF');
 188         $this->endXML();
 189     }
 190
 191     function showPpd($foaf_url, $person_uri)
 192     {
 193         $this->elementStart('PersonalProfileDocument', array('rdf:about' => $foaf_url));
 194         $this->element('maker', array('rdf:resource' => $person_uri));
 195         $this->element('primaryTopic', array('rdf:resource' => $person_uri));
 196         $this->elementEnd('PersonalProfileDocument');
 197     }
 198
 199     function showMicrobloggingAccount($profile, $service=null)
 200     {
 201         // Their account
 202         $this->elementStart('holdsAccount');
 203         $this->elementStart('OnlineAccount');
 204         if ($service) {
 205             $this->element('accountServiceHomepage', array('rdf:resource' =>
 206                                                            $service));
 207         }
 208         $this->element('accountName', null, $profile->nickname);
 209         $this->element('homepage', array('rdf:resource' => $profile->profileurl));
 210         $this->elementEnd('OnlineAccount');
 211         $this->elementEnd('holdsAccount');
 212     }
 213 }