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