gnu-social/actions/foaf.php

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<?php
/*
* Laconica - a distributed open-source microblogging tool
* Copyright (C) 2008, Controlez-Vous, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
if (!defined('LACONICA')) { exit(1); }
define('LISTENER', 1);
define('LISTENEE', -1);
define('BOTH', 0);
class FoafAction extends Action
{
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function isReadOnly()
{
return true;
}
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function prepare($args)
{
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parent::prepare($args);
$nickname_arg = $this->arg('nickname');
if (empty($nickname_arg)) {
$this->clientError(_('No such user.'), 404);
return false;
}
$this->nickname = common_canonical_nickname($nickname_arg);
// Permanent redirect on non-canonical nickname
if ($nickname_arg != $this->nickname) {
common_redirect(common_local_url('foaf',
array('nickname' => $this->nickname)),
301);
return false;
}
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$this->user = User::staticGet('nickname', $this->nickname);
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if (!$this->user) {
$this->clientError(_('No such user.'), 404);
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return false;
}
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$this->profile = $this->user->getProfile();
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if (!$this->profile) {
$this->serverError(_('User has no profile.'), 500);
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return false;
}
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return true;
}
function handle($args)
{
parent::handle($args);
header('Content-Type: application/rdf+xml');
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$this->startXML();
$this->elementStart('rdf:RDF', array('xmlns:rdf' =>
'http://www.w3.org/1999/02/22-rdf-syntax-ns#',
'xmlns:rdfs' =>
'http://www.w3.org/2000/01/rdf-schema#',
'xmlns:geo' =>
'http://www.w3.org/2003/01/geo/wgs84_pos#',
'xmlns' => 'http://xmlns.com/foaf/0.1/'));
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// This is the document about the user
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$this->showPpd('', $this->user->uri);
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// XXX: might not be a person
$this->elementStart('Person', array('rdf:about' =>
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$this->user->uri));
$this->element('mbox_sha1sum', null, sha1('mailto:' . $this->user->email));
if ($this->profile->fullname) {
$this->element('name', null, $this->profile->fullname);
}
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if ($this->profile->homepage) {
$this->element('homepage', array('rdf:resource' => $this->profile->homepage));
}
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if ($this->profile->bio) {
$this->element('rdfs:comment', null, $this->profile->bio);
}
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// XXX: more structured location data
if ($this->profile->location) {
$this->elementStart('based_near');
$this->elementStart('geo:SpatialThing');
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$this->element('name', null, $this->profile->location);
$this->elementEnd('geo:SpatialThing');
$this->elementEnd('based_near');
}
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$this->showMicrobloggingAccount($this->profile, common_root_url());
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$avatar = $this->profile->getOriginalAvatar();
if ($avatar) {
$this->elementStart('img');
$this->elementStart('Image', array('rdf:about' => $avatar->url));
foreach (array(AVATAR_PROFILE_SIZE, AVATAR_STREAM_SIZE, AVATAR_MINI_SIZE) as $size) {
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$scaled = $this->profile->getAvatar($size);
if (!$scaled->original) { // sometimes the original has one of our scaled sizes
$this->elementStart('thumbnail');
$this->element('Image', array('rdf:about' => $scaled->url));
$this->elementEnd('thumbnail');
}
}
$this->elementEnd('Image');
$this->elementEnd('img');
}
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// Get people user is subscribed to
$person = array();
$sub = new Subscription();
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$sub->subscriber = $this->profile->id;
$sub->whereAdd('subscriber != subscribed');
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if ($sub->find()) {
while ($sub->fetch()) {
if ($sub->token) {
$other = Remote_profile::staticGet('id', $sub->subscribed);
} else {
$other = User::staticGet('id', $sub->subscribed);
}
if (!$other) {
common_debug('Got a bad subscription: '.print_r($sub,true));
continue;
}
$this->element('knows', array('rdf:resource' => $other->uri));
$person[$other->uri] = array(LISTENEE, $other);
}
}
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// Get people who subscribe to user
$sub = new Subscription();
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$sub->subscribed = $this->profile->id;
$sub->whereAdd('subscriber != subscribed');
if ($sub->find()) {
while ($sub->fetch()) {
if ($sub->token) {
$other = Remote_profile::staticGet('id', $sub->subscriber);
} else {
$other = User::staticGet('id', $sub->subscriber);
}
if (!$other) {
common_debug('Got a bad subscription: '.print_r($sub,true));
continue;
}
if (array_key_exists($other->uri, $person)) {
$person[$other->uri][0] = BOTH;
} else {
$person[$other->uri] = array(LISTENER, $other);
}
}
}
$this->elementEnd('Person');
foreach ($person as $uri => $p) {
$foaf_url = null;
if ($p[1] instanceof User) {
$foaf_url = common_local_url('foaf', array('nickname' => $p[1]->nickname));
}
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$this->profile = Profile::staticGet($p[1]->id);
$this->elementStart('Person', array('rdf:about' => $uri));
if ($p[0] == LISTENER || $p[0] == BOTH) {
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$this->element('knows', array('rdf:resource' => $this->user->uri));
}
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$this->showMicrobloggingAccount($this->profile, ($p[1] instanceof User) ?
common_root_url() : null);
if ($foaf_url) {
$this->element('rdfs:seeAlso', array('rdf:resource' => $foaf_url));
}
$this->elementEnd('Person');
if ($foaf_url) {
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$this->showPpd($foaf_url, $uri);
}
}
$this->elementEnd('rdf:RDF');
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$this->endXML();
}
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function showPpd($foaf_url, $person_uri)
{
$this->elementStart('PersonalProfileDocument', array('rdf:about' => $foaf_url));
$this->element('maker', array('rdf:resource' => $person_uri));
$this->element('primaryTopic', array('rdf:resource' => $person_uri));
$this->elementEnd('PersonalProfileDocument');
}
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function showMicrobloggingAccount($profile, $service=null)
{
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// Their account
$this->elementStart('holdsAccount');
$this->elementStart('OnlineAccount');
if ($service) {
$this->element('accountServiceHomepage', array('rdf:resource' =>
$service));
}
$this->element('accountName', null, $profile->nickname);
$this->element('homepage', array('rdf:resource' => $profile->profileurl));
$this->elementEnd('OnlineAccount');
$this->elementEnd('holdsAccount');
}
}