gnu-social/plugins/ActivityPub/actions/apnotice.php

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<?php
// 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
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @copyright 2018-2019 Free Software Foundation, Inc http://www.fsf.org
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
* @link http://www.gnu.org/software/social/
*/
defined('GNUSOCIAL') || die();
/**
* Notice (Local notices only)
*
* @category Plugin
* @package GNUsocial
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
*/
class apNoticeAction extends ManagedAction
{
protected $needLogin = false;
protected $canPost = true;
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/**
* Notice id
* @var int
*/
public $notice_id;
/**
* Notice object to show
*/
public $notice = null;
/**
* Profile of the notice object
*/
public $profile = null;
/**
* Avatar of the profile of the notice object
*/
public $avatar = null;
/**
* Load attributes based on database arguments
*
* Loads all the DB stuff
*
* @param array $args $_REQUEST array
*
* @return bool success flag
*/
protected function prepare(array $args = []): bool
{
parent::prepare($args);
$this->notice_id = (int)$this->trimmed('id');
try {
$this->notice = $this->getNotice();
} catch (ClientException $e) {
//ActivityPubReturn::error('Activity deleted.', 410);
ActivityPubReturn::answer(Activitypub_tombstone::tombstone_to_array($this->notice_id), 410);
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}
$this->target = $this->notice;
if (!$this->notice->inScope($this->scoped)) {
// TRANS: Client exception thrown when trying a view a notice the user has no access to.
throw new ClientException(_m('Access restricted.'), 403);
}
$this->profile = $this->notice->getProfile();
if (!$this->profile instanceof Profile) {
// TRANS: Server error displayed trying to show a notice without a connected profile.
$this->serverError(_m('Notice has no profile.'), 500);
}
try {
$this->avatar = $this->profile->getAvatar(AVATAR_PROFILE_SIZE);
} catch (Exception $e) {
$this->avatar = null;
}
return true;
}
/**
* Is this action read-only?
*
* @return bool true
*/
public function isReadOnly($args): bool
{
return true;
}
/**
* Last-modified date for page
*
* When was the content of this page last modified? Based on notice,
* profile, avatar.
*
* @return int last-modified date as unix timestamp
*/
public function lastModified(): int
{
return max(strtotime($this->notice->modified),
strtotime($this->profile->modified),
($this->avatar) ? strtotime($this->avatar->modified) : 0);
}
/**
* Handle the Notice request
*
* @return void
* @throws EmptyPkeyValueException
* @throws InvalidUrlException
* @throws ServerException
* @author Diogo Cordeiro <diogo@fc.up.pt>
*/
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protected function handle(): void
{
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if (is_null($this->notice)) {
ActivityPubReturn::error('Invalid Activity URI.', 404);
}
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if (!$this->notice->isLocal()) {
// We have no authority on the requested activity.
ActivityPubReturn::error("This is not a local activity.", 403);
}
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$res = Activitypub_notice::notice_to_array($this->notice);
ActivityPubReturn::answer($res);
}
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/**
* Fetch the notice to show. This may be overridden by child classes to
* customize what we fetch without duplicating all of the prepare() method.
*
* @return null|Notice null if not found
* @throws ClientException If GONE
*/
protected function getNotice(): ?Notice
{
$notice = null;
try {
$notice = Notice::getByID($this->notice_id);
// Alright, got it!
return $notice;
} catch (NoResultException $e) {
// Hm, not found.
$deleted = null;
Event::handle('IsNoticeDeleted', [$this->notice_id, &$deleted]);
if ($deleted === true) {
// TRANS: Client error displayed trying to show a deleted notice.
throw new ClientException(_m('Notice deleted.'), 410);
}
}
// No such notice.
return null;
}
}