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1 <?php
2 /*
3  * StatusNet - the distributed open-source microblogging tool
4  * Copyright (C) 2008, 2009, StatusNet, 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('STATUSNET') && !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($args)
29     {
30         return true;
31     }
32
33     function prepare($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:bio' =>
86                                               'http://purl.org/vocab/bio/0.1/',
87                                               'xmlns:sioc' =>
88                                               'http://rdfs.org/sioc/ns#',
89                                               'xmlns' => 'http://xmlns.com/foaf/0.1/'));
90
91         // This is the document about the user
92
93         $this->showPpd('', $this->user->uri);
94
95         // Would be nice to tell if they were a Person or not (e.g. a #person usertag?)
96         $this->elementStart('Agent', array('rdf:about' =>
97                                              $this->user->uri));
98         if ($this->user->email) {
99             $this->element('mbox_sha1sum', null, sha1('mailto:' . $this->user->email));
100         }
101         if ($this->profile->fullname) {
102             $this->element('name', null, $this->profile->fullname);
103         }
104         if ($this->profile->homepage) {
105             $this->element('homepage', array('rdf:resource' => $this->profile->homepage));
106         }
107         if ($this->profile->profileurl) {
108             $this->element('weblog', array('rdf:resource' => $this->profile->profileurl));
109         }
110         if ($this->profile->bio) {
111             $this->element('bio:olb', null, $this->profile->bio);
112         }
113         
114         $location = $this->profile->getLocation();
115         if ($location) {
116             $attr = array();
117             if ($location->getRdfURL()) {
118                 $attr['rdf:about'] = $location->getRdfURL();
119             }
120             $location_name = $location->getName();
121             
122             $this->elementStart('based_near');
123             $this->elementStart('geo:SpatialThing', $attr);
124             if ($location_name) {
125                 $this->element('name', null, $location_name);
126             }
127             if ($location->lat) {
128                 $this->element('geo:lat', null, $location->lat);
129             }
130             if ($location->lon) {
131                 $this->element('geo:long', null, $location->lon);
132             }
133             if ($location->getURL()) {
134                 $this->element('page', array('rdf:resource'=>$location->getURL()));
135             }
136             $this->elementEnd('geo:SpatialThing');
137             $this->elementEnd('based_near');
138         }
139
140         $avatar = $this->profile->getOriginalAvatar();
141         if ($avatar) {
142             $this->elementStart('img');
143             $this->elementStart('Image', array('rdf:about' => $avatar->url));
144             foreach (array(AVATAR_PROFILE_SIZE, AVATAR_STREAM_SIZE, AVATAR_MINI_SIZE) as $size) {
145                 $scaled = $this->profile->getAvatar($size);
146                 if (!$scaled->original) { // sometimes the original has one of our scaled sizes
147                     $this->elementStart('thumbnail');
148                     $this->element('Image', array('rdf:about' => $scaled->url));
149                     $this->elementEnd('thumbnail');
150                 }
151             }
152             $this->elementEnd('Image');
153             $this->elementEnd('img');
154         }
155
156         $person = $this->showMicrobloggingAccount($this->profile,
157                                      common_root_url(), $this->user->uri,
158                                      /*$fetchSubscriptions*/true,
159                                      /*$isSubscriber*/false);
160
161         // Get people who subscribe to user
162
163         $sub = new Subscription();
164         $sub->subscribed = $this->profile->id;
165         $sub->whereAdd('subscriber != subscribed');
166
167         if ($sub->find()) {
168             while ($sub->fetch()) {
169                 $profile = Profile::staticGet('id', $sub->subscriber);
170                 if (empty($profile)) {
171                     common_debug('Got a bad subscription: '.print_r($sub,true));
172                     continue;
173                 }
174                 $user = $profile->getUser();
175                 $other_uri = $profile->getUri();
176                 if (array_key_exists($other_uri, $person)) {
177                     $person[$other_uri][0] = BOTH;
178                 } else {
179                     $person[$other_uri] = array(LISTENER,
180                                                 $profile->id,
181                                                 $profile->nickname,
182                                                 $user ? 'local' : 'remote');
183                 }
184                 unset($profile);
185             }
186         }
187
188         unset($sub);
189
190         foreach ($person as $uri => $p) {
191             list($type, $id, $nickname, $local) = $p;
192             if ($type == BOTH) {
193                 $this->element('knows', array('rdf:resource' => $uri));
194             }
195         }
196         
197         $this->elementEnd('Agent');
198
199
200         foreach ($person as $uri => $p) {
201             $foaf_url = null;
202             list($type, $id, $nickname, $local) = $p;
203             if ($local == 'local') {
204                 $foaf_url = common_local_url('foaf', array('nickname' => $nickname));
205             }
206             $profile = Profile::staticGet($id);
207             $this->elementStart('Agent', array('rdf:about' => $uri));
208             if ($type == BOTH) {
209                 $this->element('knows', array('rdf:resource' => $this->user->uri));
210             }
211             $this->showMicrobloggingAccount($profile,
212                                    ($local == 'local') ? common_root_url() : null,
213                                    $uri,
214                                    /*$fetchSubscriptions*/false,
215                                    /*$isSubscriber*/($type == LISTENER || $type == BOTH));
216             if ($foaf_url) {
217                 $this->element('rdfs:seeAlso', array('rdf:resource' => $foaf_url));
218             }
219             $this->elementEnd('Agent');
220             if ($foaf_url) {
221                 $this->showPpd($foaf_url, $uri);
222             }
223             $profile->free();
224             $profile = null;
225             unset($profile);
226         }
227
228         $this->elementEnd('rdf:RDF');
229         $this->endXML();
230     }
231
232     function showPpd($foaf_url, $person_uri)
233     {
234         $this->elementStart('PersonalProfileDocument', array('rdf:about' => $foaf_url));
235         $this->element('maker', array('rdf:resource' => $person_uri));
236         $this->element('primaryTopic', array('rdf:resource' => $person_uri));
237         $this->elementEnd('PersonalProfileDocument');
238     }
239
240     /**
241      * Output FOAF <account> bit for the given profile.
242      * 
243      * @param Profile $profile
244      * @param mixed $service Root URL of this StatusNet instance for a local
245      *                       user, otherwise null.
246      * @param mixed $useruri URI string for the referenced profile..
247      * @param boolean $fetchSubscriptions Should we load and list all their subscriptions?
248      * @param boolean $isSubscriber if not fetching subs, we can still mark the user as following the current page.
249      * 
250      * @return array if $fetchSubscribers is set, return a list of info on those
251      *               subscriptions.
252      */
253
254     function showMicrobloggingAccount($profile, $service=null, $useruri=null, $fetchSubscriptions=false, $isSubscriber=false)
255     {
256         $attr = array();
257         if ($useruri) {
258             $attr['rdf:about'] = $useruri . '#acct';
259         }
260
261         // Their account
262         $this->elementStart('account');
263         $this->elementStart('OnlineAccount', $attr);
264         if ($service) {
265             $this->element('accountServiceHomepage', array('rdf:resource' =>
266                                                            $service));
267         }
268         $this->element('accountName', null, $profile->nickname);
269         $this->element('accountProfilePage', array('rdf:resource' => $profile->profileurl));
270         if ($useruri) {
271             $this->element('sioc:account_of', array('rdf:resource'=>$useruri));
272         }
273
274         $person = array();
275
276         if ($fetchSubscriptions) {
277             // Get people user is subscribed to
278             $sub = new Subscription();
279             $sub->subscriber = $profile->id;
280             $sub->whereAdd('subscriber != subscribed');
281
282             if ($sub->find()) {
283                 while ($sub->fetch()) {
284                     $profile = Profile::staticGet('id', $sub->subscribed);
285                     if (empty($profile)) {
286                         common_debug('Got a bad subscription: '.print_r($sub,true));
287                         continue;
288                     }
289                     $user = $profile->getUser();
290                     $other_uri = $profile->getUri();
291                     $this->element('sioc:follows', array('rdf:resource' => $other_uri.'#acct'));
292                     $person[$other_uri] = array(LISTENEE,
293                                                 $profile->id,
294                                                 $profile->nickname,
295                                                 $user ? 'local' : 'remote');
296                     unset($profile);
297                 }
298             }
299
300             unset($sub);
301         } else if ($isSubscriber) {
302             // Just declare that they follow the user whose FOAF we're showing.
303             $this->element('sioc:follows', array('rdf:resource' => $this->user->uri . '#acct'));
304         }
305
306         $this->elementEnd('OnlineAccount');
307         $this->elementEnd('account');
308
309         return $person;
310     }
311 }