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