From cf394d1054747ea5334fee6bff6d6a6d20485cb8 Mon Sep 17 00:00:00 2001
From: Erich Eckner <git@eckner.net>
Date: Wed, 20 Feb 2019 10:19:13 +0100
Subject: feeds/feed.php: somewhat functional release feed

---
 feeds/feed.php | 77 +++++++++++++++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 74 insertions(+), 3 deletions(-)

diff --git a/feeds/feed.php b/feeds/feed.php
index 11cddbe..65fc372 100644
--- a/feeds/feed.php
+++ b/feeds/feed.php
@@ -18,9 +18,80 @@ array_splice(
   0, 2
 );
 
-// TODO
-if ($uri_parts[0] == 'releases')
-  throw_http_error(501, "Not Implemented", "Sry, the releases-feed is not yet implemented.");
+if ($uri_parts[0] == 'releases') {
+  if (count($uri_parts) != 1)
+    throw_http_error(501, "Not Implemented", '/feeds/' . implode('/',$uri_parts));
+  $available_isos = apcu_fetch('available_isos', $apcu_success);
+  if ($apcu_success == false || true) {
+    $ch = curl_init("https://mirror.archlinux32.org/archisos/");
+    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
+    $listing = curl_exec($ch);
+    curl_close($ch);
+    preg_match_all(
+      ',<a href="(archlinux-([0-9]{4}\.[0-9]{2}\.[0-9]{2})-([^.]+)\.iso)">\1</a>\s+(\S+)\s+\S+\s+([0-9]+)\s*\n,',
+      $listing,
+      $matches,
+      PREG_SET_ORDER
+    );
+    $available_isos = array();
+    foreach ($matches as $match) {
+      $available_isos[] = array(
+        'file' => $match[1],
+        'title' => $match[2] . '-' . $match[3],
+        'build_date' => strtotime(str_replace('.', '-', $match[2])),
+        'build_type' => $match[3],
+        'release_date' => $match[4],
+        'size' => $match[5]
+      );
+    }
+    apcu_store('available_isos', $available_isos, 3600);
+  }
+
+  header('Content-Type: application/rss+xml; charset=utf-8');
+  print "<?xml version=\"1.0\" encoding=\"utf-8\"?>";
+  print "<rss version=\"2.0\">";
+  print "<channel>";
+  print "<title>";
+  print "Arch Linux 32: Releases";
+  print "</title>";
+  print "<link>";
+  print "https://www.archlinux32.org/download/";
+  print "</link>";
+  print "<description>";
+  print "Release ISOs";
+  print "</description>";
+  print "<atom:link href=\"https://www.archlinux32.org/feeds/releases/\" rel=\"self\">";
+  print "</atom:link>";
+  print "<language>";
+  print "en-us";
+  print "</language>";
+  print "<lastBuildDate>";
+  print date('Y-m-d', $available_isos[0]['build_date']);
+  print "</lastBuildDate>";
+  foreach ($available_isos as $available_iso) {
+    print "<item>";
+    print "<title>";
+    print $available_iso['title'];
+    print "</title>";
+    // TODO: link to iso description (do we want that?)
+    print "<description>";
+    print "</description>";
+    print "<pubDate>";
+    print date('Y-m-d', $available_iso['release_date']);
+    print "</pubDate>";
+    // TODO: guid
+    print "<enclosure length=\"";
+    print date('Y-m-d', $available_iso['size']);
+    print "\" type=\"application/x-bittorrent\">";
+    // TODO: url=\"https://www.archlinux32.org/iso/2019.02.01/archlinux-2019.02.01-x86_64.iso.torrent\">";
+    print "</enclosure>";
+    print "</item>";
+  }
+  print "</channel>";
+  print "</rss>";
+
+  die();
+}
 
 if ($uri_parts[0] == 'packages') {
 
-- 
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