gnu-social/plugins/ActivityPub/Util/DiscoveryHints.php

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<?php
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declare(strict_types = 1);
// {{{ License
// This file is part of GNU social - https://www.gnu.org/software/social
//
// GNU social 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.
//
// GNU social 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 GNU social. If not, see <http://www.gnu.org/licenses/>.
// }}}
/**
* ActivityPub implementation for GNU social
*
* @package GNUsocial
* @category ActivityPub
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*
* @author Diogo Peralta Cordeiro <@diogo.site>
* @copyright 2018-2019, 2021 Free Software Foundation, Inc http://www.fsf.org
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
*/
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namespace Plugin\ActivityPub\Util;
// This file is part of GNU social - https://www.gnu.org/software/social
//
// GNU social 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.
//
// GNU social 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 GNU social. If not, see <http://www.gnu.org/licenses/>.
use App\Core\Event;
use XML_XRD;
/**
* DiscoveryHints implementation for GNU social
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*
* @copyright 2018-2019, 2021 Free Software Foundation, Inc http://www.fsf.org
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* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
*/
class DiscoveryHints
{
/**
* Search the WebFinger XRD after an ActivityPub URI
*/
public static function fromXRD(XML_XRD $xrd): array
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{
$hints = [];
if (Event::handle('StartDiscoveryHintsFromXRD', [$xrd, &$hints])) {
foreach ($xrd->links as $link) {
if ($link->rel === 'self' && $link->type === 'application/activity+json') {
$hints['activitypub'] = $link->href;
break;
}
}
Event::handle('EndDiscoveryHintsFromXRD', [$xrd, &$hints]);
}
return $hints;
}
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}