gnu-social/plugins/WebFinger/lib/webfinger.php

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<?php
/**
* StatusNet - the distributed open-source microblogging tool
* Copyright (C) 2010, StatusNet, Inc.
*
* WebFinger functions
*
* PHP version 5
*
* 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/>.
*
* @package GNUSocial
* @author Mikael Nordfeldth
* @copyright 2013 Free Software Foundation, Inc.
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
* @link http://status.net/
*/
class WebFinger
{
const PROFILEPAGE = 'http://webfinger.net/rel/profile-page';
/*
* Reconstructs a WebFinger ID from data we know about the profile.
*
* @param Profile $profile The profile we want a WebFinger ID for
*
* @return string $acct acct:user@example.com URI
*/
public static function reconstruct(Profile $profile)
{
$acct = null;
if (Event::handle('StartWebFingerReconstruction', array($profile, &$acct))) {
// TODO: getUri may not always give us the correct host on remote users?
$host = parse_url($profile->getUri(), PHP_URL_HOST);
if (empty($profile->nickname) || empty($host)) {
throw new WebFingerReconstructionException($profile);
}
$acct = sprintf('acct:%s@%s', $profile->nickname, $host);
Event::handle('EndWebFingerReconstruction', array($profile, &$acct));
}
return $acct;
}
/*
* Gets all URI aliases for a Profile
*
* @param Profile $profile The profile we want aliases for
*
* @return array $aliases All the Profile's alternative URLs
*/
public static function getAliases(Profile $profile)
{
$aliases = array();
$aliases[] = $profile->getUri();
try {
$aliases[] = $profile->getUrl();
} catch (InvalidUrlException $e) {
common_debug('Profile id='.$profile->id.' has invalid profileurl: ' .
var_export($profile->profileurl, true));
}
return $aliases;
}
/*
* Gets all identities for a Profile, includes WebFinger acct: if
* available, as well as alias URLs.
*
* @param Profile $profile The profile we want aliases for
*
* @return array $uris WebFinger acct: URI and alias URLs
*/
public static function getIdentities(Profile $profile)
{
$uris = array();
try {
$uris[] = self::reconstruct($profile);
} catch (WebFingerReconstructionException $e) {
common_debug('WebFinger reconstruction for Profile failed, ' .
' (id='.$profile->id.')');
}
$uris = array_merge($uris, self::getAliases($profile));
return $uris;
}
}