From 8d284ca82c1e33a102ef4cb7aa150dd54d876ec7 Mon Sep 17 00:00:00 2001
From: Zach Copley <zach@status.net>
Date: Tue, 6 Oct 2009 15:39:13 -0700
Subject: New action for tag timelines in the API

---
 actions/apitimelinetag.php | 212 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 212 insertions(+)
 create mode 100644 actions/apitimelinetag.php

(limited to 'actions/apitimelinetag.php')

diff --git a/actions/apitimelinetag.php b/actions/apitimelinetag.php
new file mode 100644
index 000000000..162776379
--- /dev/null
+++ b/actions/apitimelinetag.php
@@ -0,0 +1,212 @@
+<?php
+/**
+ * StatusNet, the distributed open-source microblogging tool
+ *
+ * Show the latest notices for a given tag
+ *
+ * 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  API
+ * @package   StatusNet
+ * @author    Zach Copley <zach@status.net>
+ * @copyright 2009 StatusNet, Inc.
+ * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
+ * @link      http://status.net/
+ */
+
+if (!defined('STATUSNET')) {
+    exit(1);
+}
+
+require_once INSTALLDIR.'/lib/twitterapi.php';
+
+/**
+ * Returns the 20 most recent notices tagged by a given tag
+ *
+ * @category API
+ * @package  StatusNet
+ * @author   Zach Copley <zach@status.net>
+ * @license  http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
+ * @link     http://status.net/
+ */
+
+class ApiTimelineTagAction extends TwitterapiAction
+{
+
+    var $notices = null;
+
+    /**
+     * Take arguments for running
+     *
+     * @param array $args $_REQUEST args
+     *
+     * @return boolean success flag
+     *
+     */
+
+    function prepare($args)
+    {
+        parent::prepare($args);
+
+        $this->page     = (int)$this->arg('page', 1);
+        $this->count    = (int)$this->arg('count', 20);
+        $this->tag      = $this->arg('tag');
+        $this->format   = $this->arg('format');
+
+        $this->notices = $this->getNotices();
+
+        return true;
+    }
+
+    /**
+     * Handle the request
+     *
+     * Just show the notices
+     *
+     * @param array $args $_REQUEST data (unused)
+     *
+     * @return void
+     */
+
+    function handle($args)
+    {
+        parent::handle($args);
+        $this->showTimeline();
+    }
+
+    /**
+     * Show the timeline of notices
+     *
+     * @return void
+     */
+
+    function showTimeline()
+    {
+        $sitename   = common_config('site', 'name');
+        $title      = sprintf(_("Notices tagged with %s"), $this->tag);
+        $link       = common_local_url('tag',
+            array('tag' => $this->tag));
+        $subtitle   = sprintf(_('Updates tagged with %1$s on %2$s!'),
+            $this->tag, $sitename);
+        $taguribase = common_config('integration', 'taguri');
+        $id         = "tag:$taguribase:TagTimeline:".$tag;
+
+        switch($this->format) {
+        case 'xml':
+            $this->show_xml_timeline($this->notices);
+            break;
+        case 'rss':
+            $this->show_rss_timeline($this->notices, $title, $link, $subtitle);
+            break;
+        case 'atom':
+            $selfuri = common_root_url() .
+                'api/statusnet/tags/timeline/' .
+                    $this->tag . '.atom';
+             $this->show_atom_timeline(
+                $this->notices, $title, $id, $link,
+                $subtitle, null, $selfuri
+            );
+            break;
+        case 'json':
+            $this->show_json_timeline($this->notices);
+            break;
+        default:
+            $this->clientError(_('API method not found!'), $code = 404);
+            break;
+        }
+    }
+
+    /**
+     * Get notices
+     *
+     * @return array notices
+     */
+
+    function getNotices()
+    {
+        $notices = array();
+
+        $notice = Notice_tag::getStream(
+            $this->tag,
+            ($this->page - 1) * $this->count,
+            $this->count + 1
+        );
+
+        while ($notice->fetch()) {
+            $notices[] = clone($notice);
+        }
+
+        return $notices;
+    }
+
+    /**
+     * Is this action read only?
+     *
+     * @param array $args other arguments
+     *
+     * @return boolean true
+     */
+
+    function isReadOnly($args)
+    {
+        return true;
+    }
+
+    /**
+     * When was this feed last modified?
+     *
+     * @return string datestamp of the latest notice in the stream
+     */
+
+    function lastModified()
+    {
+        if (!empty($this->notices) && (count($this->notices) > 0)) {
+            return strtotime($this->notices[0]->created);
+        }
+
+        return null;
+    }
+
+    /**
+     * An entity tag for this stream
+     *
+     * Returns an Etag based on the action name, language, and
+     * timestamps of the first and last notice in the timeline
+     *
+     * @return string etag
+     */
+
+    function etag()
+    {
+        if (!empty($this->notices) && (count($this->notices) > 0)) {
+
+            $last = count($this->notices) - 1;
+
+            return '"' . implode(
+                ':',
+                array($this->arg('action'),
+                      common_language(),
+                      $this->tag,
+                      strtotime($this->notices[0]->created),
+                      strtotime($this->notices[$last]->created))
+            )
+            . '"';
+        }
+
+        return null;
+    }
+
+}
-- 
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