friendica/src/Module/Objects.php

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<?php
/**
* @copyright Copyright (C) 2020, Friendica
*
* @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/>.
*
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*/
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namespace Friendica\Module;
use Friendica\BaseModule;
use Friendica\Database\DBA;
use Friendica\DI;
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use Friendica\Model\Item;
use Friendica\Protocol\ActivityPub;
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/**
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* ActivityPub Objects
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*/
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class Objects extends BaseModule
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{
public static function rawContent(array $parameters = [])
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{
$a = DI::app();
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if (empty($a->argv[1])) {
throw new \Friendica\Network\HTTPException\NotFoundException();
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}
if (!ActivityPub::isRequest()) {
DI::baseUrl()->redirect(str_replace('objects/', 'display/', DI::args()->getQueryString()));
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}
/// @todo Add Authentication to enable fetching of non public content
// $requester = HTTPSignature::getSigner('', $_SERVER);
// At first we try the original post with that guid
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// @TODO: Replace with parameter from router
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$item = Item::selectFirst(['id'], ['guid' => $a->argv[1], 'origin' => true, 'private' => [item::PRIVATE, Item::UNLISTED]]);
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if (!DBA::isResult($item)) {
// If no original post could be found, it could possibly be a forum post, there we remove the "origin" field.
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// @TODO: Replace with parameter from router
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$item = Item::selectFirst(['id', 'author-link'], ['guid' => $a->argv[1], 'private' => [item::PRIVATE, Item::UNLISTED]]);
if (!DBA::isResult($item) || !strstr($item['author-link'], DI::baseUrl()->get())) {
throw new \Friendica\Network\HTTPException\NotFoundException();
}
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}
$activity = ActivityPub\Transmitter::createActivityFromItem($item['id'], true);
// Only display "Create" activity objects here, no reshares or anything else
if (!is_array($activity['object']) || ($activity['type'] != 'Create')) {
throw new \Friendica\Network\HTTPException\NotFoundException();
}
$data = ['@context' => ActivityPub::CONTEXT];
$data = array_merge($data, $activity['object']);
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header('Content-Type: application/activity+json');
echo json_encode($data);
exit();
}
}