From 9879250a1789b2b5819df3a11061ceb7307e3727 Mon Sep 17 00:00:00 2001
From: Florent Bruneau <florent.bruneau@polytechnique.org>
Date: Sun, 17 Aug 2008 23:06:35 +0200
Subject: [PATCH] Add a tool to build RSS feeds.

Signed-off-by: Florent Bruneau <florent.bruneau@polytechnique.org>
---
 classes/plfeed.php      | 119 ++++++++++++++++++++++++++++++++++++++++++++++++
 templates/feed.rss2.tpl |  47 +++++++++++++++++++
 2 files changed, 166 insertions(+)
 create mode 100644 classes/plfeed.php
 create mode 100644 templates/feed.rss2.tpl

diff --git a/classes/plfeed.php b/classes/plfeed.php
new file mode 100644
index 0000000..cd2d469
--- /dev/null
+++ b/classes/plfeed.php
@@ -0,0 +1,119 @@
+<?php
+/***************************************************************************
+ *  Copyright (C) 2003-2008 Polytechnique.org                              *
+ *  http://opensource.polytechnique.org/                                   *
+ *                                                                         *
+ *  This program is free software; you can redistribute it and/or modify   *
+ *  it under the terms of the GNU General Public License as published by   *
+ *  the Free Software Foundation; either version 2 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 General Public License for more details.                           *
+ *                                                                         *
+ *  You should have received a copy of the GNU General Public License      *
+ *  along with this program; if not, write to the Free Software            *
+ *  Foundation, Inc.,                                                      *
+ *  59 Temple Place, Suite 330, Boston, MA  02111-1307  USA                *
+ ***************************************************************************/
+
+/** A feed article.
+ */
+class PlFeedArticle
+{
+    public $id;
+
+    public $author;
+    public $author_email;
+
+    public $publication;
+    public $last_modification;
+
+    public $title;
+    public $link;
+
+    public $template;
+
+    public function __construct($tpl, array& $data)
+    {
+        $this->template = $tpl;
+        foreach ($data as $key => $value) {
+            $this->$key = $value;
+        }
+    }
+}
+
+/** An abstract feed. A feed is nothing more than a set of article.
+ */
+abstract class PlFeed implements PlIterator
+{
+    public $title;
+    public $link;
+    public $description;
+
+    public $img_link;
+
+    private $article_tpl;
+    private $iterator;
+
+    public function __construct($title, $link, $desc, $img_link,
+                                $article_tpl) {
+        $this->title        = $title;
+        $this->link         = $link;
+        $this->description  = $desc;
+        $this->img_link     = $img_link;
+        $this->article_tpl  = $article_tpl;
+    }
+
+    /** Fetch the feed for the given user.
+     */
+    abstract protected function fetch($user);
+
+    public function next()
+    {
+        $data = $this->iterator->next();
+        if (!empty($data)) {
+            return new PlFeedArticle($this->article_tpl, $data);
+        }
+        return null;
+    }
+
+    public function total()
+    {
+        return $this->iterator->total();
+    }
+
+    public function first()
+    {
+        return $this->iterator->first();
+    }
+
+    public function last()
+    {
+        return $this->iterator->last();
+    }
+
+    public function run(PlPage& $page, $login, $token, $require_auth = true, $type = 'rss2')
+    {
+        $user = Platal::session()->tokenAuth($login, $token);
+        if (empty($user)) {
+            if ($require_auth) {
+                $page->kill("Authentication required");
+            } else {
+                $user = null;
+            }
+        }
+
+        $page->assign('rss_hash', $token);
+        header('Content-Type: application/rss+xml; charset=utf8');
+        $this->iterator = $this->fetch($user);
+        $page->coreTpl('feed.' . $type . '.tpl', NO_SKIN);
+        $page->assign_by_ref('feed', $this);
+        $page->run();
+    }
+}
+
+// vim:set et sw=4 sts=4 sws=4 foldmethod=marker enc=utf-8:
+?>
diff --git a/templates/feed.rss2.tpl b/templates/feed.rss2.tpl
new file mode 100644
index 0000000..6e6db1e
--- /dev/null
+++ b/templates/feed.rss2.tpl
@@ -0,0 +1,47 @@
+{**************************************************************************}
+{*                                                                        *}
+{*  Copyright (C) 2003-2008 Polytechnique.org                             *}
+{*  http://opensource.polytechnique.org/                                  *}
+{*                                                                        *}
+{*  This program is free software; you can redistribute it and/or modify  *}
+{*  it under the terms of the GNU General Public License as published by  *}
+{*  the Free Software Foundation; either version 2 of the License, or     *}
+{*  (at your option) any later version.                                   *}
+{*                                                                        *}
+{*  This program is distributed in the hope that it will be useful,       *}
+{*  but WITHOUT ANY WARRANTY; without even the implied warranty of        *}
+{*  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *}
+{*  GNU General Public License for more details.                          *}
+{*                                                                        *}
+{*  You should have received a copy of the GNU General Public License     *}
+{*  along with this program; if not, write to the Free Software           *}
+{*  Foundation, Inc.,                                                     *}
+{*  59 Temple Place, Suite 330, Boston, MA  02111-1307  USA               *}
+{*                                                                        *}
+{**************************************************************************}
+
+<?xml version="1.0"?>
+<rss version="2.0">
+  <channel>
+    <title>{$feed->title}</title>
+    <language>fr</language>
+    <link>{$feed->link}</link>
+    <description>{$feed->description}</description>
+    <image>
+      <title>{$feed->title}</title>
+      <url>{$feed->img_link}</url>
+      <link>{$feed->link}</link>
+    </image>
+    {iterate item=article from=$feed}
+    <item>
+      <title>{$article->title|strip_tags|htmlentities}</title>
+      <guid isPermaLink="false">{$article->id}</guid>
+      <link>{$article->link}</link>
+      <description><![CDATA[{include file=$article->template article=$article}]]></description>
+      <author>{$article->author}</author>
+      <pubDate>{$article->publication|rss_date}</pubDate>
+    </item>
+    {/iterate}
+  </channel>
+</rss>
+{* vim:set et sw=2 sts=2 sws=2 enc=utf-8: *}
-- 
2.1.4