articles.rss

<?php
	#*****************************************************************************
	#
	# articles.rss
	#
	# Author: 		Wayne Beaton
	# Date:			2006-04-20
	#
	# Description: This page generates an RSS feed containing articles. 
	#   An optional parameter (filter) can be provided in the request header
	#   to specify what the feed will contain. To obtain only recent articles,
	#   you would specify "/articles/articles.rss?filter=recent". If no filter
	#   is specified, the recent articles are returned.
	#****************************************************************************
	header('Content-type: text/xml');
	
	// The next line needs to occur first in the file.
	echo "<?xml version=\"1.0\"?>";

	include("scripts/articles.php");
	
	/* 
	 * If a filter was provided, get it. Otherwise,
	 * set the filter to 'recent' so that all recent
	 * articles are obtained. 
	 */
	$filter = $_GET['filter'];
	if (!$filter) $filter = 'recent';
	
	/*
	 * For backwards compatibility. The categories have
	 * been changed, but the old ones may still be referenced
	 */
	$filter = strtoupper($filter);
	if ($filter == 'UI') $filter = 'User interface';
	if ($filter == 'USER INTERFACE') $filter = 'User interface';
	if ($filter == 'WHITEPAPER') $filter = 'Whitepaper';
	if ($filter == 'TUTORIAL') $filter = 'Tutorial';
	
	/*
	 * Find the desired category. If no category
	 * can be found using the specified filter, obtain
	 * the 'recent' category.
	 */
	$listing =& get_listing();
	$category =& $listing->categories[$filter];
	if (!$category) {
		$filter = 'recent';
		$category =& $listing->categories['recent'];
	}
	
	/*
	 * Sort the category by date.
	 */
	$category->sort_articles();
	$articles =& $category->articles;
	
	echo <<<EORSS
<rss version="2.0">
  <channel>
    <title>Eclipse Corner Articles: $category->title</title>
    <link>http://www.eclipse.org/articles/index.php?filter=$filter</link>
    <description>$category->description</description>
    <image>
      <url>http://www.eclipse.org/articles/images/eclipse.png</url>
      <title>eclipse.org</title>
      <link>http://www.eclipse.org/articles</link>
    </image>
EORSS;
//	$base_date = strtotime('-6 months');
	foreach ($articles as $article) {
//		if (!$article->is_more_recent_than($base_date)) break;
		echo "\n\t<item>";
		echo "\n\t\t<title><![CDATA[$article->title]]></title>";
		echo "\n\t\t<link>http://www.eclipse.org$article->root/$article->link</link>";
		echo "\n\t\t<description><![CDATA[$article->description]]></description>";
		$date = date("D, j M Y  12:00:00 \G\M\T", $article->most_recent_date());
		echo "\n\t\t<pubDate>$date</pubDate>";
		echo "\n\t</item>";
	}
	
	echo <<<EORSS
	</channel>
</rss>
EORSS;
?>