Oups, forget the attachment_thumbnail.php action file

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)) . '"';
+    }
+*/
+}
+