gnu-social-activitypub-plugin/classes/Activitypub_attachment.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    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 Attachment representation
 *
 * @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 Activitypub_attachment extends Managed_DataObject
{
    /**
     * Generates a pretty array from an Attachment object
     *
     * @author Diogo Cordeiro <diogo@fc.up.pt>
     * @param Attachment $attachment
     * @return pretty array to be used in a response
     */
    public static function attachment_to_array($attachment)
    {
        $res = [
            '@context' => 'https://www.w3.org/ns/activitystreams',
            'type'      => 'Document',
            'mediaType' => $attachment->mimetype,
            'url'       => $attachment->getUrl(),
            'size'      => intval($attachment->size), // $attachment->getSize ()
            'name'      => $attachment->getTitle(),
        ];

        // Image
        if (substr($res["mediaType"], 0, 5) == "image") {
            $res["meta"]= [
                'width'  => $attachment->width,
                'height' => $attachment->height
            ];
        }

        return $res;
    }
}