<?php
/**
 * Name: RSS for Comments
 * Author: Shish <webmaster@shishnet.org>
 * Link: http://trac.shishnet.org/shimmie2/
 * License: GPLv2
 * Description: Self explanitory
 */

class RSS_Comments extends Extension {
// event handling {{{
	public function receive_event($event) {
		if(is_a($event, 'PostListBuildingEvent')) {
			global $page;
			global $config;
			$title = $config->get_string('title');

			$page->add_header("<link rel=\"alternate\" type=\"application/rss+xml\" ".
				"title=\"$title - Comments\" href=\"".make_link("rss/comments")."\" />");
		}
		if(is_a($event, 'PageRequestEvent') && ($event->page_name == "rss")) {
			if($event->get_arg(0) == 'comments') {
				global $database;
				$this->do_rss($database);
			}
		}
	}
// }}}
// output {{{
	private function do_rss($database) {
		global $page;
		global $config;
		$page->set_mode("data");
		$page->set_type("application/xml");

		$comments = $database->db->GetAll("
				SELECT
				users.id as user_id, users.name as user_name,
				comments.comment as comment, comments.id as comment_id,
				comments.image_id as image_id, comments.owner_ip as poster_ip,
				UNIX_TIMESTAMP(posted) AS posted_timestamp
				FROM comments
				LEFT JOIN users ON comments.owner_id=users.id
				ORDER BY comments.id DESC
				LIMIT 10
				");

		$data = "";
		foreach($comments as $comment) {
			$image_id = $comment['image_id'];
			$comment_id = $comment['comment_id'];
			$link = make_link("post/view/$image_id");
			$owner = html_escape($comment['user_name']);
			$posted = strftime("%a, %d %b %Y %T %Z", $comment['posted_timestamp']);
			$comment = html_escape($comment['comment']);
			$content = html_escape("$owner: $comment");
			
			$data .= "
				<item>
					<title>$owner comments on $image_id</title>
					<link>$link</link>
					<guid isPermaLink=\"false\">$comment_id</guid>
					<pubDate>$posted</pubDate>
					<description>$content</description>
				</item>
			";
		}

		$title = $config->get_string('title');
		$base_href = $config->get_string('base_href');
		$version = $config->get_string('version');
		$xml = <<<EOD
<?xml version="1.0" encoding="utf-8" ?>
<rss version="2.0">
    <channel>
        <title>$title</title>
        <description>The latest comments on the image board</description>
		<link>$base_href</link>
		<generator>$version</generator>
		<copyright>(c) 2007 Shish</copyright>
		$data
	</channel>
</rss>
EOD;
		$page->set_data($xml);
	}
// }}}
}
add_event_listener(new RSS_Comments());
?>