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gnu-social-v2-archive-activ.../actions/apactorfollowers.php

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<?php
/**
* GNU social - a federating social network
*
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* ActivityPubPlugin implementation for GNU Social
*
* LICENCE: 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 <http://www.gnu.org/licenses/>.
*
* @category Plugin
* @package GNUsocial
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @author Daniel Supernault <danielsupernault@gmail.com>
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* @copyright 2018 Free Software Foundation http://fsf.org
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
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* @link https://www.gnu.org/software/social/
*/
if (!defined('GNUSOCIAL')) {
exit(1);
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}
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/**
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* Actor's Followers Collection
*
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* @category Plugin
* @package GNUsocial
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
* @link http://www.gnu.org/software/social/
*/
class apActorFollowersAction extends ManagedAction
{
protected $needLogin = false;
protected $canPost = true;
/**
* Handle the Followers Collection request
*
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @return void
*/
protected function handle()
{
try {
$profile = Profile::getByID($this->trimmed('id'));
$url = ActivityPubPlugin::actor_url($profile);
} catch (Exception $e) {
ActivityPubReturn::error('Invalid Actor URI.', 404);
}
if (!$profile->isLocal()) {
ActivityPubReturn::error("This is not a local user.");
}
if (!isset($_GET["page"])) {
$page = 1;
} else {
$page = intval($this->trimmed('page'));
}
if ($page <= 0) {
ActivityPubReturn::error('Invalid page number.');
}
$since = ($page - 1) * PROFILES_PER_MINILIST;
$limit = (($page - 1) == 0 ? 1 : $page) * PROFILES_PER_MINILIST;
/* Fetch Followers */
try {
$sub = $profile->getSubscribers($since, $limit);
} catch (NoResultException $e) {
ActivityPubReturn::error('This user has no followers.');
}
/* Calculate total items */
$total_subs = $profile->subscriberCount();
$total_pages = ceil($total_subs / PROFILES_PER_MINILIST);
if ($total_pages == 0) {
ActivityPubReturn::error('This user has no followers.');
}
if ($page > $total_pages) {
ActivityPubReturn::error("There are only {$total_pages} pages.");
}
/* Get followers' URLs */
$subs = array();
while ($sub->fetch()) {
$subs[] = ActivityPubPlugin::actor_uri($sub);
}
$res = [
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'@context' => [
"https://www.w3.org/ns/activitystreams",
"https://w3id.org/security/v1",
],
'id' => "{$url}/followers.json",
'type' => ($page == 0 ? 'OrderedCollection' : 'OrderedCollectionPage'),
'totalItems' => $total_subs,
'next' => $page+1 > $total_pages ? null : "{$url}/followers.json?page=".($page+1 == 1 ? 2 : $page+1),
'prev' => $page == 1 ? null : "{$url}/followers.json?page=".($page-1 <= 0 ? 1 : $page-1),
'orderedItems' => $subs
];
ActivityPubReturn::answer($res);
}
}