232 lines
8.4 KiB
PHP
Executable File
232 lines
8.4 KiB
PHP
Executable File
<?php
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/**
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* GNU social - a federating social network
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*
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* ActivityPubPlugin implementation for GNU Social
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*
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* LICENCE: This program 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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* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* @category Plugin
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* @package GNUsocial
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* @author Daniel Supernault <danielsupernault@gmail.com>
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* @author Diogo Cordeiro <diogo@fc.up.pt>
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* @copyright 2018 Free Software Foundation http://fsf.org
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* @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/
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*/
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if (!defined('GNUSOCIAL')) {
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exit(1);
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}
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/**
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* ActivityPub notice representation
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*
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* @category Plugin
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* @package GNUsocial
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* @author Diogo Cordeiro <diogo@fc.up.pt>
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* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
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* @link http://www.gnu.org/software/social/
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*/
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class Activitypub_notice extends Managed_DataObject
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{
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/**
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* Generates a pretty notice from a Notice object
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*
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* @author Diogo Cordeiro <diogo@fc.up.pt>
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* @param Notice $notice
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* @return pretty array to be used in a response
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*/
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public static function notice_to_array($notice)
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{
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$profile = $notice->getProfile();
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$attachments = [];
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foreach ($notice->attachments() as $attachment) {
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$attachments[] = Activitypub_attachment::attachment_to_array($attachment);
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}
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$tags = [];
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foreach ($notice->getTags() as $tag) {
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if ($tag != "") { // Hacky workaround to avoid stupid outputs
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$tags[] = Activitypub_tag::tag_to_array($tag);
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}
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}
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$cc = [common_local_url('apActorFollowers', ['id' => $profile->getID()])];
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foreach ($notice->getAttentionProfiles() as $to_profile) {
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$cc[] = $href = $to_profile->getUri();
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$tags[] = Activitypub_mention_tag::mention_tag_to_array_from_values($href, $to_profile->getNickname().'@'.parse_url($href, PHP_URL_HOST));
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}
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// In a world without walls and fences, we should make everything Public!
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$to[]= 'https://www.w3.org/ns/activitystreams#Public';
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$item = [
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'@context' => 'https://www.w3.org/ns/activitystreams',
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'id' => $notice->getUrl(),
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'type' => 'Note',
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'published' => str_replace(' ', 'T', $notice->getCreated()).'Z',
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'url' => $notice->getUrl(),
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'atributtedTo' => ActivityPubPlugin::actor_uri($profile),
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'to' => ['https://www.w3.org/ns/activitystreams#Public'],
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'cc' => $cc,
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'atomUri' => $notice->getUrl(),
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'conversation' => $notice->getConversationUrl(),
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'content' => $notice->getRendered(),
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'isLocal' => $notice->isLocal(),
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'attachment' => $attachments,
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'tag' => $tags
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];
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// Is this a reply?
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if (!empty($notice->reply_to)) {
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$item['inReplyTo'] = Notice::getById($notice->reply_to)->getUrl();
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$item['inReplyToAtomUri'] = Notice::getById($notice->reply_to)->getUrl();
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}
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// Do we have a location for this notice?
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try {
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$location = Notice_location::locFromStored($notice);
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$item['latitude'] = $location->lat;
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$item['longitude'] = $location->lon;
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} catch (Exception $e) {
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// Apparently no.
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}
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return $item;
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}
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/**
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* Create a Notice via ActivityPub data.
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* Returns created Notice.
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*
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* @author Diogo Cordeiro <diogo@fc.up.pt>
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* @param Profile $actor_profile
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* @param int32 $id
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* @param string $url
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* @param string $content
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* @param array|string $cc
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* @param array $settings possible keys: ['inReplyTo', 'latitude', 'longitude']
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* @return Notice
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* @throws Exception
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*/
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public static function create_notice($actor_profile, $id, $url, $content, $cc, $settings)
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{
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$act = new Activity();
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$act->verb = ActivityVerb::POST;
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$act->time = time();
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$act->actor = $actor_profile->asActivityObject();
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$act->context = new ActivityContext();
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// Is this a reply?
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if (isset($settings['inReplyTo'])) {
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try {
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$inReplyTo = ActivityPubPlugin::grab_notice_from_url($settings['inReplyTo']);
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} catch (Exception $e) {
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throw new Exception('Invalid Object inReplyTo value.');
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}
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$act->context->replyToID = $inReplyTo->getUri();
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$act->context->replyToUrl = $inReplyTo->getUrl();
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} else {
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$inReplyTo = null;
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}
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$discovery = new Activitypub_explorer;
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// Generate Cc objects
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if (is_array($cc)) {
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// Remove duplicates from Cc actors set
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array_unique($cc);
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foreach ($cc as $cc_url) {
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try {
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$cc_profiles = array_merge($cc_profiles, $discovery->lookup($cc_url));
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} catch (Exception $e) {
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// Invalid actor found, just let it go. // TODO: Fallback to OStatus
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}
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}
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} elseif (empty($cc) || in_array($cc, ACTIVITYPUB_PUBLIC_TO)) {
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// No need to do anything else at this point, let's just break out the if
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} else {
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try {
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$cc_profiles = array_merge($cc_profiles, $discovery->lookup($cc));
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} catch (Exception $e) {
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// Invalid actor found, just let it go. // TODO: Fallback to OStatus
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}
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}
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unset($discovery);
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foreach ($cc_profiles as $tp) {
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$act->context->attention[ActivityPubPlugin::actor_uri($tp)] = 'http://activitystrea.ms/schema/1.0/person';
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}
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// Add location if that is set
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if (isset($settings['latitude'], $settings['longitude'])) {
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$act->context->location = Location::fromLatLon($settings['latitude'], $settings['longitude']);
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}
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// Reject notice if it is too long (without the HTML)
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if (Notice::contentTooLong($content)) {
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throw new Exception('That\'s too long. Maximum notice size is %d character.');
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}
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$options = ['source' => 'ActivityPub', 'uri' => $id, 'url' => $url];
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$actobj = new ActivityObject();
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$actobj->type = ActivityObject::NOTE;
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$actobj->content = strip_tags($content, '<p><b><i><u><a><ul><ol><li>');
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// Finally add the activity object to our activity
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$act->objects[] = $actobj;
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try {
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return Notice::saveActivity($act, $actor_profile, $options);
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} catch (Exception $e) {
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throw new Exception($e->getMessage());
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}
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}
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/**
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* Validates a remote notice.
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*
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* @author Diogo Cordeiro <diogo@fc.up.pt>
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* @param Object $data
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* @return boolean true in case of success
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* @throws Exception
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*/
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public static function validate_remote_notice($data)
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{
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if (!isset($data->id)) {
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throw new Exception('Object ID not specified.');
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} elseif (!filter_var($data->id, FILTER_VALIDATE_URL)) {
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throw new Exception('Invalid Object ID.');
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}
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if ($data->type !== 'Note') {
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throw new Exception('Invalid Object type.');
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}
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if (!isset($data->content)) {
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throw new Exception('Object content was not specified.');
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}
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if (!isset($data->url)) {
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throw new Exception('Object url was not specified.');
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} elseif (!filter_var($data->url, FILTER_VALIDATE_URL)) {
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throw new Exception('Invalid Object URL.');
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}
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if (!isset($data->to)) {
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throw new Exception('Object To was not specified.');
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}
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return true;
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}
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}
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