141 lines
4.4 KiB
PHP
141 lines
4.4 KiB
PHP
<?php
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// This file is part of GNU social - https://www.gnu.org/software/social
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//
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// GNU social is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// GNU social is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with GNU social. If not, see <http://www.gnu.org/licenses/>.
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/**
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* ActivityPub implementation for GNU social
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*
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* @package GNUsocial
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*
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* @author Diogo Cordeiro <diogo@fc.up.pt>
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* @copyright 2018-2019 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
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*
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* @see http://www.gnu.org/software/social/
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*/
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defined('GNUSOCIAL') || die();
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/**
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* Actor's Followers Collection
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*
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* @category Plugin
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* @package GNUsocial
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*
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* @author Diogo Cordeiro <diogo@fc.up.pt>
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* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
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*/
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class apActorFollowersAction extends ManagedAction
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{
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protected $needLogin = false;
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protected $canPost = true;
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/**
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* Handle the Followers Collection request
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*
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* @throws Exception
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*
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* @return void
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*
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* @author Diogo Cordeiro <diogo@fc.up.pt>
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*/
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protected function handle()
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{
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try {
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$profile = Profile::getByID($this->trimmed('id'));
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$profile_id = $profile->getID();
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} catch (Exception $e) {
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ActivityPubReturn::error('Invalid Actor URI.', 404);
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}
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if (!$profile->isLocal()) {
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ActivityPubReturn::error('This is not a local user.', 403);
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}
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if (!isset($_GET['page'])) {
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$page = 0;
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} else {
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$page = (int) ($this->trimmed('page'));
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}
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if ($page < 0) {
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ActivityPubReturn::error('Invalid page number.');
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}
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$since = ($page - 1) * PROFILES_PER_MINILIST;
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$limit = PROFILES_PER_MINILIST;
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// Calculate total items
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$total_subs = Activitypub_profile::subscriberCount($profile);
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$total_pages = ceil($total_subs / PROFILES_PER_MINILIST);
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$res = [
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'@context' => [
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'https://www.w3.org/ns/activitystreams',
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'https://w3id.org/security/v1',
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],
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'id' => common_local_url('apActorFollowers', ['id' => $profile_id]) . (($page != 0) ? '?page=' . $page : ''),
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'type' => ($page == 0 ? 'OrderedCollection' : 'OrderedCollectionPage'),
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'totalItems' => $total_subs,
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];
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if ($page == 0) {
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$res['first'] = common_local_url('apActorFollowers', ['id' => $profile_id]) . '?page=1';
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} else {
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$res['orderedItems'] = $this->generate_followers($profile, $since, $limit);
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$res['partOf'] = common_local_url('apActorFollowers', ['id' => $profile_id]);
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if ($page + 1 < $total_pages) {
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$res['next'] = common_local_url('apActorFollowers', ['id' => $profile_id]) . 'page=' . ($page + 1 == 1 ? 2 : $page + 1);
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}
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if ($page > 1) {
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$res['prev'] = common_local_url('apActorFollowers', ['id' => $profile_id]) . '?page=' . ($page - 1 <= 0 ? 1 : $page - 1);
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}
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}
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ActivityPubReturn::answer($res);
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}
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/**
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* Generates a list of stalkers for a given profile.
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*
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* @param Profile $profile
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* @param int $since
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* @param int $limit
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*
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* @throws Exception
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*
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* @return array of URIs
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*
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* @author Diogo Cordeiro <diogo@fc.up.pt>
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*/
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public static function generate_followers($profile, $since, $limit)
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{
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$subs = [];
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try {
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$sub = Activitypub_profile::getSubscribers($profile, $since, $limit);
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// Get followers' URLs
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foreach ($sub as $s) {
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$subs[] = $s->getUri();
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}
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} catch (NoResultException $e) {
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// Just let the exception go on its merry way
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}
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return $subs;
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}
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}
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