friendica/src/Module/Diaspora/Fetch.php

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<?php
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/**
* @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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namespace Friendica\Module\Diaspora;
use Friendica\BaseModule;
use Friendica\Core\Protocol;
use Friendica\Core\System;
use Friendica\DI;
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use Friendica\Model\Item;
use Friendica\Model\User;
use Friendica\Network\HTTPException;
use Friendica\Protocol\Diaspora;
use Friendica\Util\Strings;
/**
* This module is part of the Diaspora protocol.
* It is used for fetching single public posts.
*/
class Fetch extends BaseModule
{
public static function rawContent(array $parameters = [])
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{
$app = DI::app();
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// @TODO: Replace with parameter from router
if (($app->argc != 3) || (!in_array($app->argv[1], ["post", "status_message", "reshare"]))) {
throw new HTTPException\NotFoundException();
}
// @TODO: Replace with parameter from router
$guid = $app->argv[2];
// Fetch the item
$fields = [
'uid', 'title', 'body', 'guid', 'contact-id', 'private', 'created', 'received', 'app', 'location', 'coord', 'network',
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'event-id', 'resource-id', 'author-link', 'author-avatar', 'author-name', 'plink', 'owner-link', 'attach'
];
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$condition = ['wall' => true, 'private' => [Item::PUBLIC, Item::UNLISTED], 'guid' => $guid, 'network' => [Protocol::DFRN, Protocol::DIASPORA]];
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$item = Item::selectFirst($fields, $condition);
if (empty($item)) {
$condition = ['guid' => $guid, 'network' => [Protocol::DFRN, Protocol::DIASPORA]];
$item = Item::selectFirst(['author-link'], $condition);
if (empty($item)) {
$parts = parse_url($item["author-link"]);
if (empty($parts["scheme"]) || empty($parts["host"])) {
throw new HTTPException\InternalServerErrorException();
}
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$host = $parts["scheme"] . "://" . $parts["host"];
if (Strings::normaliseLink($host) != Strings::normaliseLink(DI::baseUrl()->get())) {
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$location = $host . "/fetch/" . $app->argv[1] . "/" . urlencode($guid);
System::externalRedirect($location, 301);
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}
}
throw new HTTPException\NotFoundException();
}
// Fetch some data from the author (We could combine both queries - but I think this is more readable)
$user = User::getOwnerDataById($item["uid"]);
if (!$user) {
throw new HTTPException\NotFoundException();
}
$status = Diaspora::buildStatus($item, $user);
$xml = Diaspora::buildPostXml($status["type"], $status["message"]);
// Send the envelope
header("Content-Type: application/magic-envelope+xml; charset=utf-8");
echo Diaspora::buildMagicEnvelope($xml, $user);
exit();
}
}