add rss feed - closes #1

index.php

@@ -12,6 +12,7 @@
     <div class="container">
 	<h1>tilderadio archive</h1>
 	<p><a href="https://tilderadio.org">back to tilderadio.org</a> - <a href="https://radio.tildeverse.org/radio/8000/radio.ogg">listen now</a></p>
+        <p>here's the archive as an <a href="rss.php">rss feed</a>. source for this archive <a href="https://tildegit.org/tilderadio/archive">here</a></p>
 	<hr>
 <?php
 foreach (glob("/var/www/archive/*") as $dir) {

rss.php

@@ -0,0 +1,36 @@
+<?php
+header('Content-type: text/xml');
+
+$feedName = "tilderadio archive feed";
+$feedDesc = "feed of archived shows broadcasted on tilderadio";
+$feedURL = "https://archive.tilderadio.org/rss.php";
+$feedBaseURL = "https://archive.tilderadio.org/"; // must end in trailing forward slash (/).
+
+$allowed_ext = ".mp3,.MP3";
+?>
+<?xml version="1.0"?>
+<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom">
+	<channel>
+		<title><?=$feedName?></title>
+		<link><?=$feedURL?></link>
+		<description><?=$feedDesc?></description>
+		<atom:link href="<?=$feedURL?>" rel="self" type="application/rss+xml" />
+
+	<?php
+	$files = glob("*/*.mp3");
+
+	foreach ($files as $file) {
+		$timestamp = filectime($file);
+		list($author, $filename) = explode("/", $file, 2);
+		?>
+	<item>
+			<title><?=$filename?></title>
+			<author><?=$author?></author>
+			<link><?=$feedBaseURL?><?=$file?></link>
+			<guid><?=$feedBaseURL?><?=$file?></guid>
+			<pubDate><?=date(DATE_RSS, $timestamp)?></pubDate>
+		</item>
+	<?php } ?>
+
+	</channel>
+</rss>