gnu-social-activitypub-plugin/classes/Activitypub_notice.php

<?php
/**
 * GNU social - a federating social network
 *
 * 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    Daniel Supernault <danielsupernault@gmail.com>
 * @author    Diogo Cordeiro <diogo@fc.up.pt>
 * @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
 * @link      https://www.gnu.org/software/social/
 */
if (!defined ('GNUSOCIAL')) {
        exit (1);
}

/**
 * ActivityPub notice representation
 *
 * @category  Plugin
 * @package   GNUsocial
 * @author    Daniel Supernault <danielsupernault@gmail.com>
 * @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 Activitypub_notice extends Managed_DataObject
{
        /**
         * Generates a pretty notice from a Notice object
         *
         * @param Notice $notice
         * @return pretty array to be used in a response
         */
        public static function notice_to_array ($notice)
        {
                $attachments = array ();
                foreach($notice->attachments () as $attachment) {
                        $attachments[] = Activitypub_attachment::attachment_to_array ($attachment);
                }

                $tags = array ();
                foreach($notice->getTags()as $tag) {
                        if ($tag != "") {       // Hacky workaround to avoid stupid outputs
                                $tags[] = Activitypub_tag::tag_to_array ($tag);
                        }
                }

                $to = array ();
                foreach ($notice->getAttentionProfileIDs () as $to_id) {
                        $to[] = Profile::getById ($to_id)->getUri ();
                }
                if (!is_null($to)) {
                        $to = array ("https://www.w3.org/ns/activitystreams#Public");
                }

                $item = [
                        'id'           => $notice->getUrl (),
                        'type'         => 'Notice',
                        'actor'        => $notice->getProfile ()->getUrl (),
                        'published'    => $notice->getCreated (),
                        'to'           => $to,
                        'content'      => $notice->getContent (),
                        'url'          => $notice->getUrl (),
                        'reply_to'     => empty($notice->reply_to) ? null : Notice::getById($notice->reply_to)->getUrl (),
                        'is_local'     => $notice->isLocal (),
                        'conversation' => intval ($notice->conversation),
                        'attachment'   => $attachments,
                        'tag'          => $tags
                ];

                return $item;
        }
}