friendica/src/Worker/CheckRelMeProfileLink.php

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<?php
/**
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* @copyright Copyright (C) 2010-2023, the Friendica project
*
* @license GNU AGPL version 3 or any later version
*
* 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 <https://www.gnu.org/licenses/>.
*
*/
namespace Friendica\Worker;
use DOMDocument;
use Friendica\Content\Text\HTML;
use Friendica\Core\Logger;
use Friendica\DI;
use Friendica\Model\Profile;
use Friendica\Model\User;
use Friendica\Network\HTTPClient\Client\HttpClientAccept;
use Friendica\Network\HTTPClient\Client\HttpClientOptions;
use GuzzleHttp\Psr7\Uri;
/* This class is used to verify the homepage link of a user profile.
* To do so, we look for rel="me" links in the given homepage, if one
* of them points to the Friendica profile of the user, a verification
* mark is added to the link.
*
* To reverse the process, if a homepage link is given, it is displayed
* with the rel="me" attribute as well, so that 3rd party tools can
* verify the connection between the two pages.
*
* This task will be performed by the worker on a daily basis _and_ every
* time the user changes their homepage link. In the first case the priority
* of the task is set to LOW, with the second case it is MEDIUM.
*
* rel-me microformat docs https://microformats.org/wiki/rel-me
*/
class CheckRelMeProfileLink
{
/* Cheks the homepage of a profile for a rel-me link back to the user profile
*
* @param $uid (int) the UID of the user
*/
public static function execute(int $uid)
{
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Logger::notice('Verifying the homepage', ['uid' => $uid]);
Profile::update(['homepage_verified' => false], $uid);
$owner = User::getOwnerDataById($uid);
if (empty($owner['homepage'])) {
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Logger::notice('The user has no homepage link.', ['uid' => $uid]);
return;
}
$xrd_timeout = DI::config()->get('system', 'xrd_timeout');
$curlResult = DI::httpClient()->get($owner['homepage'], HttpClientAccept::HTML, [HttpClientOptions::TIMEOUT => $xrd_timeout]);
if (!$curlResult->isSuccess()) {
Logger::notice('Could not cURL the homepage URL', ['owner homepage' => $owner['homepage']]);
return;
}
$content = $curlResult->getBody();
if (!$content) {
Logger::notice('Empty body of the fetched homepage link). Cannot verify the relation to profile of UID %s.', ['uid' => $uid, 'owner homepage' => $owner['homepage']]);
return;
}
$doc = new DOMDocument();
if (!@$doc->loadHTML($content)) {
Logger::notice('Could not parse the content');
return;
}
if (HTML::checkRelMeLink($doc, new Uri($owner['url']))) {
Profile::update(['homepage_verified' => true], $uid);
Logger::notice('Homepage URL verified', ['uid' => $uid, 'owner homepage' => $owner['homepage']]);
} else {
Logger::notice('Homepage URL could not be verified', ['uid' => $uid, 'owner homepage' => $owner['homepage']]);
}
}
}