blog.php now generates RSS feeds

blog.php

@@ -15,8 +15,10 @@ spl_autoload_register(function($class){
 use md\MarkdownExtra;
 
 define('BLOG_PATH', dirname(__FILE__). '/articles');
-
 define('BLOG_EXT', 'md');
+define('BLOG_TITLE', "speedie's blog");
+define('BLOG_DESC', "speedie's blog, about stuff I want to talk about.");
+define('BLOG_URL', "https://speedie.site/blog");
 define('BASE_URI', str_replace('/index.php', '', $_SERVER['SCRIPT_NAME']));
 
 define('SELF', $_SERVER['SCRIPT_NAME']);
@@ -231,13 +233,13 @@ $action = isset($_REQUEST['action']) ? $_REQUEST['action'] : 'view';
 $newPage = "";
 $text = "";
 $html = "";
+$rss = "";
 
-if ($action === 'view') {
-	$page = preg_match('@^/@', @$_SERVER["PATH_INFO"]) ?
+$page = preg_match('@^/@', @$_SERVER["PATH_INFO"]) ?
 	urldecode(substr($_SERVER["PATH_INFO"], 1)) : urldecode(@$_REQUEST['page']);
-	$page = sanitizeFilename($page);
+$page = sanitizeFilename($page);
 
-    if ($page != '') {
+if ($page != '') {
     $filename = fileNameForPage($page);
 
     if ( file_exists($filename) ) {
@@ -247,9 +249,8 @@ if ($action === 'view') {
         include('php/404.php');
         die();
     }
-    } else {
+} else {
     $action = 'home';
-    }
 }
 
 if ( $action === 'home') {
@@ -266,9 +267,43 @@ if ( $action === 'home') {
     // Page list
 	$date_format = __('date_format', TITLE_DATE);
 
+    // Create the RSS feed
+    $rss .= "<rss version=\"2.0\" xmlns:atom=\"http://www.w3.org/2005/Atom\">\n";
+    $rss .= "<channel>\n";
+    $rss .= "  <title>". BLOG_TITLE ."</title>\n";
+    $rss .= "  <description>". BLOG_DESC ."</description>\n";
+    $rss .= "  <atom:link href=\"". BLOG_URL ."\" rel=\"self\" type=\"application/rss+xml\" />\n";
+
 	foreach ($filelist as $pageName => $pageDate) {
+        $pubDate = date('r', strtotime(getDateForPage($pageName, $date_format, $pageDate)));
+        $link = pageURL($pageName, $pageName);
+        $filename = fileNameForPage($pageName);
+        $text = file_get_contents($filename);
+
+        $description = toHTML($text);
+
+        $rss .= "<item>\n";
+        $rss .= "    <title>$pageName</title>\n";
+        $rss .= "    <link>$link</link>\n";
+        $rss .= "    <guid>$link</guid>\n";
+        $rss .= "    <pubDate>$pubDate</pubDate>\n";
+        $rss .= "    <description>\n";
+        $rss .= "        <![CDATA[\n";
+        $rss .= "            $description\n";
+        $rss .= "        ]]>\n";
+        $rss .= "    </description>\n";
+        $rss .= "</item>\n";
 		$html .= "<p>".pageLink($pageName, $pageName).", written ".getDateForPage($pageName, $date_format, $pageDate)."</p>\n";
     }
+
+    // End the RSS feed
+    $rss .= "</channel>\n";
+    $rss .= "</rss>\n";
+
+    if (file_get_contents('rss.xml') != $rss) {
+        file_put_contents('rss.xml', $rss);
+        echo "GNU";
+    }
 } else { // convert the page and view it
 	$html .= empty($text) ? '' : toHTML($text);
 }