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:geo' =>
  55                                                                                           'http://www.w3.org/2003/01/geo/wgs84_pos#',
  56                                                                                           'xmlns' => 'http://xmlns.com/foaf/0.1/'));
  57
  58                 # This is the document about the user
  59
  60                 $this->show_ppd('', $user->uri);
  61
  62                 # XXX: might not be a person
  63                 common_element_start('Person', array('rdf:about' =>
  64                                                                                          $user->uri));
  65                 common_element('mbox_sha1sum', NULL, sha1('mailto:' . $user->email));
  66                 if ($profile->fullname) {
  67                         common_element('name', NULL, $profile->fullname);
  68                 }
  69                 if ($profile->homepage) {
  70                         common_element('homepage', array('rdf:resource' => $profile->homepage));
  71                 }
  72                 if ($profile->bio) {
  73                         common_element('rdfs:comment', NULL, $profile->bio);
  74                 }
  75                 # XXX: more structured location data
  76                 if ($profile->location) {
  77                         common_element_start('based_near');
  78                         common_element_start('geo:SpatialThing');
  79                         common_element('name', NULL, $profile->location);
  80                         common_element_end('geo:SpatialThing');
  81                         common_element_end('based_near');
  82                 }
  83
  84                 $this->show_microblogging_account($profile, common_root_url());
  85
  86                 $avatar = $profile->getOriginalAvatar();
  87
  88                 if ($avatar) {
  89                         common_element_start('img');
  90                         common_element_start('Image', array('rdf:about' => $avatar->url));
  91                         foreach (array(AVATAR_PROFILE_SIZE, AVATAR_STREAM_SIZE, AVATAR_MINI_SIZE) as $size) {
  92                                 $scaled = $profile->getAvatar($size);
  93                                 if (!$scaled->original) { # sometimes the original has one of our scaled sizes
  94                                         common_element_start('thumbnail');
  95                                         common_element('Image', array('rdf:about' => $scaled->url));
  96                                         common_element_end('thumbnail');
  97                                 }
  98                         }
  99                         common_element_end('Image');
 100                         common_element_end('img');
 101                 }
 102
 103                 # Get people user is subscribed to
 104
 105                 $person = array();
 106
 107                 $sub = new Subscription();
 108                 $sub->subscriber = $profile->id;
 109
 110                 if ($sub->find()) {
 111                         while ($sub->fetch()) {
 112                                 if ($sub->token) {
 113                                         $other = Remote_profile::staticGet('id', $sub->subscribed);
 114                                 } else {
 115                                         $other = User::staticGet('id', $sub->subscribed);
 116                                 }
 117                                 if (!$other) {
 118                                         common_debug('Got a bad subscription: '.print_r($sub,TRUE));
 119                                         continue;
 120                                 }
 121                                 common_element('knows', array('rdf:resource' => $other->uri));
 122                                 $person[$other->uri] = array(LISTENEE, $other);
 123                         }
 124                 }
 125
 126                 # Get people who subscribe to user
 127
 128                 $sub = new Subscription();
 129                 $sub->subscribed = $profile->id;
 130
 131                 if ($sub->find()) {
 132                         while ($sub->fetch()) {
 133                                 if ($sub->token) {
 134                                         $other = Remote_profile::staticGet('id', $sub->subscriber);
 135                                 } else {
 136                                         $other = User::staticGet('id', $sub->subscriber);
 137                                 }
 138                                 if (!$other) {
 139                                         common_debug('Got a bad subscription: '.print_r($sub,TRUE));
 140                                         continue;
 141                                 }
 142                                 if (array_key_exists($other->uri, $person)) {
 143                                         $person[$other->uri][0] = BOTH;
 144                                 } else {
 145                                         $person[$other->uri] = array(LISTENER, $other);
 146                                 }
 147                         }
 148                 }
 149
 150                 common_element_end('Person');
 151
 152                 foreach ($person as $uri => $p) {
 153                         $foaf_url = NULL;
 154                         if ($p[1] instanceof User) {
 155                                 $foaf_url = common_local_url('foaf', array('nickname' => $p[1]->nickname));
 156                         }
 157                         $profile = Profile::staticGet($p[1]->id);
 158                         common_element_start('Person', array('rdf:about' => $uri));
 159                         if ($p[0] == LISTENER || $p[0] == BOTH) {
 160                                 common_element('knows', array('rdf:resource' => $user->uri));
 161                         }
 162                         $this->show_microblogging_account($profile, ($p[1] instanceof User) ?
 163                                                                                           common_root_url() : NULL);
 164                         if ($foaf_url) {
 165                                 common_element('rdfs:seeAlso', array('rdf:resource' => $foaf_url));
 166                         }
 167                         common_element_end('Person');
 168                         if ($foaf_url) {
 169                                 $this->show_ppd($foaf_url, $uri);
 170                         }
 171                 }
 172
 173                 common_element_end('rdf:RDF');
 174         }
 175
 176         function show_ppd($foaf_url, $person_uri) {
 177                 common_element_start('PersonalProfileDocument', array('rdf:about' => $foaf_url));
 178                 common_element('maker', array('rdf:resource' => $person_uri));
 179                 common_element('primaryTopic', array('rdf:resource' => $person_uri));
 180                 common_element_end('PersonalProfileDocument');
 181         }
 182
 183         function show_microblogging_account($profile, $service=NULL) {
 184                 # Their account
 185                 common_element_start('holdsAccount');
 186                 common_element_start('OnlineAccount');
 187                 if ($service) {
 188                         common_element('accountServiceHomepage', array('rdf:resource' =>
 189                                                                                                                    $service));
 190                 }
 191                 common_element('accountName', NULL, $profile->nickname);
 192                 common_element('homepage', array('rdf:resource' => $profile->profileurl));
 193                 common_element_end('OnlineAccount');
 194                 common_element_end('holdsAccount');
 195         }
 196 }