Homepage: Generate an RSS feed for the recent blog posts page

skyjake · May 20, 2017 · 6602321 · 6602321
1 parent 68e3037
commit 6602321
Showing 1 changed file with 77 additions and 21 deletions.
diff --git a/web2/recent_posts.php b/web2/recent_posts.php
@@ -1,14 +1,14 @@
 <?php
 require_once('include/template.inc.php');
+setlocale(LC_ALL, 'en_US.UTF-8');
 $page_title = 'Recent Blog Posts';
-generate_page_header($page_title);
 
 function cmp_post($a, $b)
 {
     return strcmp($b->date, $a->date);
 }
 
-function generate_post_blocks()
+function fetch_posts()
 {
     // Fetch the cached blog entries.
     cache_try_load(cache_key('news', 'news'), -1);
@@ -18,7 +18,12 @@ function generate_post_blocks()
 
     $posts = array_merge($news->posts, $dev->posts);
     usort($posts, "cmp_post");
-
+    return $posts;
+}
+
+function generate_post_blocks()
+{
+    $posts = fetch_posts();
     for ($i = 0; $i < count($posts); $i++) {
         $post = $posts[$i];
         $url = $post->url;
@@ -32,7 +37,7 @@ function generate_post_blocks()
         echo(
         "<div class='block blog-post'>
             <article>
-                <h1><a href='$url'>$post->title</a></h1>
+                <h1 id='$post->slug'><a href='$url'>$post->title</a></h1>
                 <div class='post-metadata'>                    
                     <a class='post-category' href='$cat_link'>$category->title</a> &middot; 
                     <time datetime='$post->date'>$date</time> &middot;
@@ -45,22 +50,73 @@ function generate_post_blocks()
     }
 }
 
-?>
-<body>
-    <?php 
+function generate_blog_rss_feed()
+{
+    header('Content-Type: application/rss+xml');
+
+    $posts = fetch_posts();
+    $latest_ts = time();
+    if (count($posts) > 0) {        
+        $latest_ts = timestamp_from_date($posts[0]->date);
+    }
+    $rfc_latest = gmstrftime(RFC_TIME, $latest_ts);
+    echo("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
+        ."<rss version=\"2.0\" xmlns:atom=\"http://www.w3.org/2005/Atom\">\n"
+        .'<channel>'
+        .'<title>Doomsday Blog</title>'
+        .'<link>http://dengine.net/recent_posts</link>'
+        .'<atom:link href="http://dengine.net/recent_posts?format=rss" rel="self" type="application/rss+xml" />'
+        .'<description>Recent posts on the Doomsday Engine development blog</description>'
+        .'<language>en-us</language>'
+        ."<webMaster>webmaster@dengine.net (Jaakko Keränen)</webMaster>"
+        ."<lastBuildDate>$rfc_latest</lastBuildDate>"
+        .'<generator>http://dengine.net/recent_posts</generator>'
+        .'<ttl>180</ttl>'); # 3 hours    
+    for ($i = 0; $i < count($posts); $i++) {
+        $post = $posts[$i];
+        $rfc_time = gmstrftime(RFC_TIME, timestamp_from_date($post->date));
+        $content = $post->content;
+        $author = $post->author->name;
+        echo("\n<item>\n"
+            ."<title>$post->title_plain</title>\n"
+            ."<link>http://dengine.net/recent_posts#$post->slug</link>\n"
+            ."<author>$author@dengine.net ($author)</author>\n"
+            ."<pubDate>$rfc_time</pubDate>\n"
+            #."<atom:summary><![CDATA[$summary]]></atom:summary>\n"
+            ."<description><![CDATA[$content]]></description>\n"
+            ."<guid isPermaLink=\"false\">$post->slug</guid>\n"
+            ."</item>\n");
+    }
+    echo('</channel></rss>');
+}
+
+function generate_html()
+{
+    generate_page_header($page_title);
+    echo("<body>");
     include('include/topbar.inc.php'); 
     generate_page_title($page_title);
-    ?>
-    <div id='content'>
-        <div id='page-content'>
-            <?php generate_post_blocks(); ?>      
-            <div class='block'>
-                <article>
-                    <p><a href="/blog">More blog posts &rarr;</a></p>
-                </article>
-            </div>                  
-        </div>
-        <?php generate_sidebar(); ?>
-    </div>
-    <?php generate_sitemap(); ?>
-</body>
+    echo("<div id='content'><div id='page-content'>");    
+    generate_post_blocks();
+    echo("<div class='block'>
+                    <article>
+                        <p><a href='/blog'>More blog posts &rarr;</a></p>
+                    </article>
+                </div>                  
+            </div>");
+    generate_sidebar();
+    echo("</div>");
+    generate_sitemap();
+    echo("</body>");
+}
+
+if ($_SERVER['REQUEST_METHOD'] == 'GET') {
+    if ($format = $_GET['format']) {    
+        if ($format == 'rss') {
+            generate_blog_rss_feed();
+            exit;
+        }
+    }
+}
+// Otherwise...
+generate_html();