410 lines
18 KiB
PHP
410 lines
18 KiB
PHP
<?php
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declare(strict_types = 1);
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// {{{ License
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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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/**
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* ActivityPub implementation for GNU social
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*
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* @package GNUsocial
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* @category ActivityPub
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*
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* @author Diogo Peralta Cordeiro <@diogo.site>
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* @copyright 2021 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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namespace Plugin\ActivityPub\Util\Model;
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use ActivityPhp\Type;
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use ActivityPhp\Type\AbstractObject;
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use App\Core\Cache;
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use App\Core\DB\DB;
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use App\Core\Event;
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use App\Core\GSFile;
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use App\Core\HTTPClient;
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use App\Entity\NoteType;
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use function App\Core\I18n\_m;
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use App\Core\Log;
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use App\Core\Router\Router;
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use App\Core\VisibilityScope;
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use App\Entity\Note as GSNote;
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use App\Util\Common;
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use App\Util\Exception\ClientException;
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use App\Util\Exception\DuplicateFoundException;
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use App\Util\Exception\NoSuchActorException;
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use App\Util\Exception\ServerException;
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use App\Util\Formatting;
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use App\Util\HTML;
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use App\Util\TemporaryFile;
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use Component\Attachment\Entity\ActorToAttachment;
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use Component\Attachment\Entity\AttachmentToNote;
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use Component\Conversation\Conversation;
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use Component\FreeNetwork\FreeNetwork;
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use Component\Language\Entity\Language;
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use Component\Tag\Entity\NoteTag;
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use Component\Tag\Tag;
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use DateTime;
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use DateTimeInterface;
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use Exception;
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use InvalidArgumentException;
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use Plugin\ActivityPub\ActivityPub;
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use Plugin\ActivityPub\Entity\ActivitypubObject;
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use Plugin\ActivityPub\Util\Explorer;
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use Plugin\ActivityPub\Util\Model;
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use Symfony\Contracts\HttpClient\Exception\ClientExceptionInterface;
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use Symfony\Contracts\HttpClient\Exception\RedirectionExceptionInterface;
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use Symfony\Contracts\HttpClient\Exception\ServerExceptionInterface;
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use Symfony\Contracts\HttpClient\Exception\TransportExceptionInterface;
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/**
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* This class handles translation between JSON and GSNotes
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*
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* @copyright 2021 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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class Note extends Model
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{
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/**
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* Create an Entity from an ActivityStreams 2.0 JSON string
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* This will persist a new GSNote
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*
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* @throws ClientException
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* @throws ClientExceptionInterface
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* @throws DuplicateFoundException
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* @throws NoSuchActorException
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* @throws RedirectionExceptionInterface
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* @throws ServerException
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* @throws ServerExceptionInterface
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* @throws TransportExceptionInterface
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*/
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public static function fromJson(string|AbstractObject $json, array $options = []): GSNote
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{
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$handleInReplyTo = function (AbstractObject|string $type_note): ?int {
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try {
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$parent_note = \is_null($type_note->get('inReplyTo')) ? null : ActivityPub::getObjectByUri($type_note->get('inReplyTo'), try_online: true);
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if ($parent_note instanceof GSNote) {
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return $parent_note->getId();
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} elseif ($parent_note instanceof Type\AbstractObject && $parent_note->get('type') === 'Note') {
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return self::fromJson($parent_note)->getId();
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} else {
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return null;
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}
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} catch (Exception $e) {
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Log::debug('ActivityStreams:Model:Note-> An error occurred retrieving parent note.', [$e]);
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// Sadly we won't be able to have this note inside the correct conversation for now.
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// TODO: Create an entity that registers notes falsely without parent so, when the parent is retrieved,
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// we can update the child with the correct parent.
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return null;
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}
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};
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$source = $options['source'] ?? 'ActivityPub';
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$type_note = \is_string($json) ? self::jsonToType($json) : $json;
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$actor_id = null;
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$actor = null;
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$to = $type_note->has('to') ? (\is_string($type_note->get('to')) ? [$type_note->get('to')] : $type_note->get('to')) : [];
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$cc = $type_note->has('cc') ? (\is_string($type_note->get('cc')) ? [$type_note->get('cc')] : $type_note->get('cc')) : [];
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if ($json instanceof AbstractObject
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&& \array_key_exists('test_authority', $options)
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&& $options['test_authority']
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&& \array_key_exists('actor_uri', $options)
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) {
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$actor_uri = $options['actor_uri'];
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if ($actor_uri !== $type_note->get('attributedTo')) {
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if (parse_url($actor_uri)['host'] !== parse_url($type_note->get('attributedTo'))['host']) {
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throw new Exception('You don\'t seem to have enough authority to create this note.');
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}
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} else {
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$actor = $options['actor'] ?? null;
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$actor_id = $options['actor_id'] ?? $actor?->getId();
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}
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}
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if (\is_null($actor_id)) {
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$actor = ActivityPub::getActorByUri($type_note->get('attributedTo'));
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$actor_id = $actor->getId();
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}
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$map = [
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'is_local' => false,
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'created' => new DateTime($type_note->get('published') ?? 'now'),
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'content' => $type_note->get('content') ?? null,
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'rendered' => $type_note->has('content') ? HTML::sanitize($type_note->get('content')) : null,
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'content_type' => 'text/html',
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'language_id' => $type_note->get('contentLang') ?? null,
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'url' => $type_note->get('url') ?? $type_note->get('id'),
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'actor_id' => $actor_id,
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'reply_to' => $reply_to = $handleInReplyTo($type_note),
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'modified' => new DateTime(),
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'type' => match ($type_note->get('type')) {'Page' => NoteType::PAGE, default => NoteType::NOTE},
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'source' => $source,
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];
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if (!\is_null($map['language_id'])) {
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$map['language_id'] = Language::getByLocale($map['language_id'])->getId();
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} else {
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$map['language_id'] = null;
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}
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// Scope
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if (\in_array('https://www.w3.org/ns/activitystreams#Public', $to)) {
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// Public: Visible for all, shown in public feeds
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$map['scope'] = VisibilityScope::EVERYWHERE;
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} elseif (\in_array('https://www.w3.org/ns/activitystreams#Public', $cc)) {
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// Unlisted: Visible for all but not shown in public feeds
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// It isn't the note that dictates what feed is shown in but the feed, it only dictates who can access it.
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$map['scope'] = VisibilityScope::EVERYWHERE;
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} else {
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// Either Followers-only or Direct
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if ($type_note->get('directMessage') ?? false // Is DM explicitly?
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|| (empty($type_note->get('cc')))) { // Only has TO targets
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$map['scope'] = VisibilityScope::MESSAGE;
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} else { // Then is collection
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$map['scope'] = VisibilityScope::COLLECTION;
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}
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}
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$object_mentions_ids = [];
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foreach ($to as $target) {
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if ($target === 'https://www.w3.org/ns/activitystreams#Public') {
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continue;
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}
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try {
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$actor = ActivityPub::getActorByUri($target);
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$object_mentions_ids[$actor->getId()] = $target;
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// If $to is a group, set note's scope as Group
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if ($actor->isGroup()) {
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$map['scope'] = VisibilityScope::GROUP;
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}
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} catch (Exception $e) {
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Log::debug('ActivityPub->Model->Note->fromJson->getActorByUri', [$e]);
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}
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}
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foreach ($cc as $target) {
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if ($target === 'https://www.w3.org/ns/activitystreams#Public') {
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continue;
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}
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try {
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$actor = ActivityPub::getActorByUri($target);
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$object_mentions_ids[$actor->getId()] = $target;
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} catch (Exception $e) {
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Log::debug('ActivityPub->Model->Note->fromJson->getActorByUri', [$e]);
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}
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}
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$obj = new GSNote();
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foreach ($map as $prop => $val) {
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$set = Formatting::snakeCaseToCamelCase("set_{$prop}");
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$obj->{$set}($val);
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}
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// Attachments
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$processed_attachments = [];
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foreach ($type_note->get('attachment') as $attachment) {
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if ($attachment->get('type') === 'Document') {
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// Retrieve media
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$get_response = HTTPClient::get($attachment->get('url'));
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$media = $get_response->getContent();
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unset($get_response);
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// Ignore empty files
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if (!empty($media)) {
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// Create an attachment for this
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$temp_file = new TemporaryFile();
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$temp_file->write($media);
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$filesize = $temp_file->getSize();
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$max_file_size = Common::getUploadLimit();
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if ($max_file_size < $filesize) {
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throw new ClientException(_m('No file may be larger than {quota} bytes and the file you sent was {size} bytes. '
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. 'Try to upload a smaller version.', ['quota' => $max_file_size, 'size' => $filesize], ));
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}
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Event::handle('EnforceUserFileQuota', [$filesize, $actor_id]);
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$processed_attachments[] = [GSFile::storeFileAsAttachment($temp_file), $attachment->get('name')];
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}
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}
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}
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DB::persist($obj);
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// Assign conversation to this note
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Conversation::assignLocalConversation($obj, $reply_to);
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foreach ($type_note->get('tag') as $ap_tag) {
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switch ($ap_tag->get('type')) {
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case 'Mention':
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case 'Group':
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try {
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$actor = ActivityPub::getActorByUri($ap_tag->get('href'));
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$object_mentions_ids[$actor->getId()] = $ap_tag->get('href');
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} catch (Exception $e) {
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Log::debug('ActivityPub->Model->Note->fromJson->getActorByUri', [$e]);
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}
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break;
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case 'Collection':
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$explorer = new Explorer();
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try {
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$actors = $explorer->lookup($ap_tag->get('href'));
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foreach ($actors as $actor) {
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$object_mentions_ids[$actor->getId()] = $ap_tag->get('href');
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}
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} catch (Exception $e) {
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Log::debug('ActivityPub->Model->Note->fromJson->getActorByUri', [$e]);
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}
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break;
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case 'Hashtag':
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$match = ltrim($ap_tag->get('name'), '#');
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$tag = Tag::extract($match);
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$canonical_tag = $ap_tag->get('canonical') ?? Tag::canonicalTag($tag, \is_null($lang_id = $obj->getLanguageId()) ? null : Language::getById($lang_id)->getLocale());
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DB::persist(NoteTag::create([
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'tag' => $tag,
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'canonical' => $canonical_tag,
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'note_id' => $obj->getId(),
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'use_canonical' => $ap_tag->get('canonical') ?? false,
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'language_id' => $lang_id ?? null,
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]));
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Cache::pushList("tag-{$canonical_tag}", $obj);
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foreach (Tag::cacheKeys($canonical_tag) as $key) {
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Cache::delete($key);
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}
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break;
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}
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}
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// The content would be non-sanitized text/html
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Event::handle('ProcessNoteContent', [$obj, $obj->getRendered(), $obj->getContentType(), $process_note_content_extra_args = ['TagProcessed' => true, 'ignoreLinks' => $object_mentions_ids]]);
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$object_mentions_ids = array_keys($object_mentions_ids);
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$obj->setObjectMentionsIds($object_mentions_ids);
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if ($processed_attachments !== []) {
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foreach ($processed_attachments as [$a, $fname]) {
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if (DB::count('actor_to_attachment', $args = ['attachment_id' => $a->getId(), 'actor_id' => $actor_id]) === 0) {
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DB::persist(ActorToAttachment::create($args));
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}
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DB::persist(AttachmentToNote::create(['attachment_id' => $a->getId(), 'note_id' => $obj->getId(), 'title' => $fname]));
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}
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}
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$map = [
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'object_uri' => $type_note->get('id'),
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'object_type' => 'note',
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'object_id' => $obj->getId(),
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'created' => new DateTime($type_note->get('published') ?? 'now'),
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'modified' => new DateTime(),
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];
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$ap_obj = new ActivitypubObject();
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foreach ($map as $prop => $val) {
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$set = Formatting::snakeCaseToCamelCase("set_{$prop}");
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$ap_obj->{$set}($val);
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}
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DB::persist($ap_obj);
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return $obj;
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}
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/**
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* Get a JSON
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*
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* @throws Exception
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*/
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public static function toJson(mixed $object, ?int $options = null): string
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{
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if ($object::class !== GSNote::class) {
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throw new InvalidArgumentException('First argument type must be a Note.');
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}
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$attr = [
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'@context' => 'https://www.w3.org/ns/activitystreams',
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'type' => match($object->getType()) {NoteType::NOTE => 'Note', NoteType::PAGE => 'Page'},
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'id' => $object->getUrl(),
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'published' => $object->getCreated()->format(DateTimeInterface::RFC3339),
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'attributedTo' => $object->getActor()->getUri(Router::ABSOLUTE_URL),
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'content' => $object->getRendered(),
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'attachment' => [],
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'tag' => [],
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'inReplyTo' => \is_null($object->getReplyTo()) ? null : ActivityPub::getUriByObject(GSNote::getById($object->getReplyTo())),
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'inConversation' => $object->getConversationUri(),
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'directMessage' => $object->getScope() === VisibilityScope::MESSAGE,
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];
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// Target scope
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switch ($object->getScope()) {
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case VisibilityScope::EVERYWHERE:
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$attr['to'] = ['https://www.w3.org/ns/activitystreams#Public'];
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$attr['cc'] = [Router::url('actor_subscribers_id', ['id' => $object->getActor()->getId()], Router::ABSOLUTE_URL)];
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break;
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case VisibilityScope::LOCAL:
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throw new ClientException('This note was not federated.', 403);
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case VisibilityScope::ADDRESSEE:
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case VisibilityScope::MESSAGE:
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$attr['to'] = []; // Will be filled later
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$attr['cc'] = [];
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break;
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case VisibilityScope::GROUP:
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// Will have the group in the To
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case VisibilityScope::COLLECTION:
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// Since we don't support sending unlisted/followers-only
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// notices, arriving here means we're instead answering to that type
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// of posts. In this situation, it's safer to always send answers of type unlisted.
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$attr['to'] = [];
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$attr['cc'] = ['https://www.w3.org/ns/activitystreams#Public'];
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break;
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default:
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Log::error('ActivityPub->Note->toJson: Found an unknown visibility scope.');
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throw new ServerException('Found an unknown visibility scope which cannot federate.');
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}
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// Mentions
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foreach ($object->getNotificationTargets() as $mention) {
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$attr['tag'][] = [
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'type' => 'Mention',
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'href' => ($href = $mention->getUri()),
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'name' => FreeNetwork::mentionToName($mention->getNickname(), $href),
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];
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$attr['to'][] = $href;
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}
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// Hashtags
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foreach ($object->getTags() as $hashtag) {
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$attr['tag'][] = [
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'type' => 'Hashtag',
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'href' => $hashtag->getUrl(type: Router::ABSOLUTE_URL),
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'name' => "#{$hashtag->getTag()}",
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'canonical' => $hashtag->getCanonical(),
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];
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}
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// Attachments
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foreach ($object->getAttachments() as $attachment) {
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$attr['attachment'][] = [
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'type' => 'Document',
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'mediaType' => $attachment->getMimetype(),
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'url' => $attachment->getUrl(note: $object, type: Router::ABSOLUTE_URL),
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'name' => AttachmentToNote::getByPK(['attachment_id' => $attachment->getId(), 'note_id' => $object->getId()])->getTitle(),
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'width' => $attachment->getWidth(),
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'height' => $attachment->getHeight(),
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];
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}
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$type = self::jsonToType($attr);
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Event::handle('ActivityPubAddActivityStreamsTwoData', [$type->get('type'), &$type]);
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return $type->toJson($options);
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}
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}
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