<?php
/*
 * Name: RSS for Images
 * Author: Shish <webmaster@shishnet.org>
 * License: GPLv2
 * Description: Self explanatory
 */

class RSS_Images extends SimpleExtension {
	public function onPostListBuilding($event) {
		global $config, $page;
		$title = $config->get_string('title');

		if(count($event->search_terms) > 0) {
			$search = implode(' ', $event->search_terms);
			$page->add_header("<link id=\"images\" rel=\"alternate\" type=\"application/rss+xml\" ".
				"title=\"$title - Images with tags: $search\" href=\"".make_link("rss/images/$search/1")."\" />");
		}
		else {
			$page->add_header("<link id=\"images\" rel=\"alternate\" type=\"application/rss+xml\" ".
				"title=\"$title - Images\" href=\"".make_link("rss/images/1")."\" />");
		}
	}

	public function onPageRequest($event) {
		if($event->page_matches("rss/images")) {
			$page_number = 0;
			$search_terms = array();

			if($event->count_args() == 1) {
				$page_number = int_escape($event->get_arg(0));
			}
			else if($event->count_args() == 2) {
				$search_terms = explode(' ', $event->get_arg(0));
				$page_number = int_escape($event->get_arg(1));
			}

			$images = Image::find_images(($page_number-1)*10, 10, $search_terms);
			$this->do_rss($images, $search_terms, $page_number);
		}
	}


	private function do_rss($images, $search_terms, $page_number) {
		global $page;
		global $config;
		$page->set_mode("data");
		$page->set_type("application/rss+xml");

		$data = "";
		foreach($images as $image) {
			$link = make_http(make_link("post/view/{$image->id}"));
			$tags = $image->get_tag_list();
			$owner = $image->get_owner();
			$thumb_url = $image->get_thumb_link();
			$image_url = $image->get_image_link();
			$posted = date(DATE_RSS, $image->posted_timestamp);
			$content = html_escape(
				"<p>" . Themelet::build_thumb_html($image) . "</p>" .
				"<p>Uploaded by " . $owner->name . "</p>"
			);

			$data .= "
		<item>
			<title>{$image->id} - $tags</title>
			<link>$link</link>
			<guid isPermaLink=\"true\">$link</guid>
			<pubDate>$posted</pubDate>
			<description>$content</description>
			<media:thumbnail url=\"$thumb_url\"/>
			<media:content url=\"$image_url\"/>
		</item>
			";
		}

		$title = $config->get_string('title');
		$base_href = make_http($config->get_string('base_href'));
		$search = "";
		if(count($search_terms) > 0) {
			$search = html_escape(implode(" ", $search_terms)) . "/";
		}

		if($page_number > 1) {
			$prev_url = make_link("rss/images/$search".($page_number-1));
			$prev_link = "<atom:link rel=\"previous\" href=\"$prev_url\" />";
		}
		else {
			$prev_link = "";
		}
		$next_url = make_link("rss/images/$search".($page_number+1));
		$next_link = "<atom:link rel=\"next\" href=\"$next_url\" />"; // no end...

		$version = VERSION;
		$xml = "<"."?xml version=\"1.0\" encoding=\"utf-8\" ?".">
<rss version=\"2.0\" xmlns:media=\"http://search.yahoo.com/mrss\" xmlns:atom=\"http://www.w3.org/2005/Atom\">
    <channel>
        <title>$title</title>
        <description>The latest uploads to the image board</description>
		<link>$base_href</link>
		<generator>Shimmie-$version</generator>
		<copyright>(c) 2007 Shish</copyright>
		$prev_link
		$next_link
		$data
	</channel>
</rss>";
		$page->set_data($xml);
	}
}
?>
