gnu-social/actions/foaf.php

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<?php
/*
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* StatusNet - the distributed open-source microblogging tool
* Copyright (C) 2008, 2009, StatusNet, 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('STATUSNET') && !defined('LACONICA')) { exit(1); }
define('LISTENER', 1);
define('LISTENEE', -1);
define('BOTH', 0);
// @todo XXX: Documentation missing.
class FoafAction extends Action
{
function isReadOnly($args)
{
return true;
}
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function prepare($args)
{
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parent::prepare($args);
$nickname_arg = $this->arg('nickname');
if (empty($nickname_arg)) {
// TRANS: Client error displayed when requesting Friends of a Friend feed without providing a user nickname.
$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;
}
$this->user = User::getKV('nickname', $this->nickname);
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if (!$this->user) {
// TRANS: Client error displayed when requesting Friends of a Friend feed for an object that is not a 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) {
// TRANS: Error message displayed when referring to a user without a 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();
$this->elementStart('rdf:RDF', array('xmlns:rdf' =>
'http://www.w3.org/1999/02/22-rdf-syntax-ns#',
'xmlns:rdfs' =>
'http://www.w3.org/2000/01/rdf-schema#',
'xmlns:geo' =>
'http://www.w3.org/2003/01/geo/wgs84_pos#',
'xmlns:bio' =>
'http://purl.org/vocab/bio/0.1/',
'xmlns:sioc' =>
'http://rdfs.org/sioc/ns#',
'xmlns' => 'http://xmlns.com/foaf/0.1/'));
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// This is the document about the user
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$this->showPpd('', $this->user->uri);
// Would be nice to tell if they were a Person or not (e.g. a #person usertag?)
$this->elementStart('Agent', array('rdf:about' =>
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$this->user->uri));
if ($this->user->email) {
$this->element('mbox_sha1sum', null, sha1('mailto:' . $this->user->email));
}
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if ($this->profile->fullname) {
$this->element('name', null, $this->profile->fullname);
}
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if ($this->profile->homepage) {
$this->element('homepage', array('rdf:resource' => $this->profile->homepage));
}
if ($this->profile->profileurl) {
$this->element('weblog', array('rdf:resource' => $this->profile->profileurl));
}
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if ($this->profile->bio) {
$this->element('bio:olb', null, $this->profile->bio);
}
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$location = $this->profile->getLocation();
if ($location) {
$attr = array();
if ($location->getRdfURL()) {
$attr['rdf:about'] = $location->getRdfURL();
}
$location_name = $location->getName();
$this->elementStart('based_near');
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$this->elementStart('geo:SpatialThing', $attr);
if ($location_name) {
$this->element('name', null, $location_name);
}
if ($location->lat) {
$this->element('geo:lat', null, $location->lat);
}
if ($location->lon) {
$this->element('geo:long', null, $location->lon);
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}
if ($location->getURL()) {
$this->element('page', array('rdf:resource'=>$location->getURL()));
}
$this->elementEnd('geo:SpatialThing');
$this->elementEnd('based_near');
}
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$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');
}
$person = $this->showMicrobloggingAccount($this->profile,
common_root_url(), $this->user->uri,
/*$fetchSubscriptions*/true,
/*$isSubscriber*/false);
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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()) {
$profile = Profile::getKV('id', $sub->subscriber);
if (empty($profile)) {
common_debug('Got a bad subscription: '.print_r($sub,true));
continue;
}
$user = $profile->getUser();
$other_uri = $profile->getUri();
if (array_key_exists($other_uri, $person)) {
$person[$other_uri][0] = BOTH;
} else {
$person[$other_uri] = array(LISTENER,
$profile->id,
$profile->nickname,
$user ? 'local' : 'remote');
}
unset($profile);
}
}
unset($sub);
foreach ($person as $uri => $p) {
list($type, $id, $nickname, $local) = $p;
if ($type == BOTH) {
$this->element('knows', array('rdf:resource' => $uri));
}
}
$this->elementEnd('Agent');
foreach ($person as $uri => $p) {
$foaf_url = null;
list($type, $id, $nickname, $local) = $p;
if ($local == 'local') {
$foaf_url = common_local_url('foaf', array('nickname' => $nickname));
}
$profile = Profile::getKV($id);
$this->elementStart('Agent', array('rdf:about' => $uri));
if ($type == BOTH) {
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$this->element('knows', array('rdf:resource' => $this->user->uri));
}
$this->showMicrobloggingAccount($profile,
($local == 'local') ? common_root_url() : null,
$uri,
/*$fetchSubscriptions*/false,
/*$isSubscriber*/($type == LISTENER || $type == BOTH));
if ($foaf_url) {
$this->element('rdfs:seeAlso', array('rdf:resource' => $foaf_url));
}
$this->elementEnd('Agent');
if ($foaf_url) {
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$this->showPpd($foaf_url, $uri);
}
$profile->free();
$profile = null;
unset($profile);
}
$this->elementEnd('rdf:RDF');
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$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');
}
/**
* Output FOAF <account> bit for the given profile.
*
* @param Profile $profile
* @param mixed $service Root URL of this StatusNet instance for a local
* user, otherwise null.
* @param mixed $useruri URI string for the referenced profile..
* @param boolean $fetchSubscriptions Should we load and list all their subscriptions?
* @param boolean $isSubscriber if not fetching subs, we can still mark the user as following the current page.
*
* @return array if $fetchSubscribers is set, return a list of info on those
* subscriptions.
*/
function showMicrobloggingAccount($profile, $service=null, $useruri=null, $fetchSubscriptions=false, $isSubscriber=false)
{
$attr = array();
if ($useruri) {
$attr['rdf:about'] = $useruri . '#acct';
}
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// Their account
$this->elementStart('account');
$this->elementStart('OnlineAccount', $attr);
if ($service) {
$this->element('accountServiceHomepage', array('rdf:resource' =>
$service));
}
$this->element('accountName', null, $profile->nickname);
$this->element('accountProfilePage', array('rdf:resource' => $profile->profileurl));
if ($useruri) {
$this->element('sioc:account_of', array('rdf:resource'=>$useruri));
}
$person = array();
if ($fetchSubscriptions) {
// Get people user is subscribed to
$sub = new Subscription();
$sub->subscriber = $profile->id;
$sub->whereAdd('subscriber != subscribed');
if ($sub->find()) {
while ($sub->fetch()) {
$profile = Profile::getKV('id', $sub->subscribed);
if (empty($profile)) {
common_debug('Got a bad subscription: '.print_r($sub,true));
continue;
}
$user = $profile->getUser();
$other_uri = $profile->getUri();
$this->element('sioc:follows', array('rdf:resource' => $other_uri.'#acct'));
$person[$other_uri] = array(LISTENEE,
$profile->id,
$profile->nickname,
$user ? 'local' : 'remote');
unset($profile);
}
}
unset($sub);
} else if ($isSubscriber) {
// Just declare that they follow the user whose FOAF we're showing.
$this->element('sioc:follows', array('rdf:resource' => $this->user->uri . '#acct'));
}
$this->elementEnd('OnlineAccount');
$this->elementEnd('account');
return $person;
}
}