gnu-social/actions/attachment_thumbnail.php

<?php
/**
 * Laconica, the distributed open-source microblogging tool
 *
 * Show notice attachments
 *
 * PHP version 5
 *
 * 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  Personal
 * @package   Laconica
 * @author    Evan Prodromou <evan@controlyourself.ca>
 * @copyright 2008-2009 Control Yourself, Inc.
 * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
 * @link      http://laconi.ca/
 */

if (!defined('LACONICA')) {
    exit(1);
}

require_once INSTALLDIR.'/actions/attachment.php';

/**
 * Show notice attachments
 *
 * @category Personal
 * @package  Laconica
 * @author   Evan Prodromou <evan@controlyourself.ca>
 * @license  http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
 * @link     http://laconi.ca/
 */

class Attachment_thumbnailAction extends AttachmentAction
{
    /**
     * Show page, a template method.
     *
     * @return nothing
     */
    function showPage()
    {
        if (Event::handle('StartShowBody', array($this))) {
            $this->showCore();
            Event::handle('EndShowBody', array($this));
        }
    }

    /**
     * Show core.
     *
     * Shows local navigation, content block and aside.
     *
     * @return nothing
     */
    function showCore()
    {
        $file_thumbnail = File_thumbnail::staticGet('file_id', $this->attachment->id);
        if (empty($file_thumbnail->url)) {
            return;
        }
        $url = $file_thumbnail->url;

        $attr = array(
              'id' => 'thumbnail'
            , 'src' => $url
            , 'alt' => 'Thumbnail'
        );

        $this->element('img', $attr);

    }

    /**
     * Last-modified date for page
     *
     * When was the content of this page last modified? Based on notice,
     * profile, avatar.
     *
     * @return int last-modified date as unix timestamp
     */
/*
    function lastModified()
    {
        return max(strtotime($this->notice->created),
                   strtotime($this->profile->modified),
                   ($this->avatar) ? strtotime($this->avatar->modified) : 0);
    }
*/

    /**
     * An entity tag for this page
     *
     * Shows the ETag for the page, based on the notice ID and timestamps
     * for the notice, profile, and avatar. It's weak, since we change
     * the date text "one hour ago", etc.
     *
     * @return string etag
     */
/*
    function etag()
    {
        $avtime = ($this->avatar) ?
          strtotime($this->avatar->modified) : 0;

        return 'W/"' . implode(':', array($this->arg('action'),
                                          common_language(),
                                          $this->notice->id,
                                          strtotime($this->notice->created),
                                          strtotime($this->profile->modified),
                                          $avtime)) . '"';
    }
*/
}