From 6009cb451ed0a42ab1c3e01e9e10a77cb8cbe8f0 Mon Sep 17 00:00:00 2001
From: Ruben <post@rubensolvang.no>
Date: Mon, 3 Nov 2025 21:50:43 +0100
Subject: [PATCH] Add markdown file caching functionality

Add cache.php with get/set functions for markdown content Update
rendering to check cache before processing files
---
 app/cache.php     | 27 +++++++++++++++++++++++++++
 app/rendering.php | 15 ++++++++++++---
 2 files changed, 39 insertions(+), 3 deletions(-)
 create mode 100644 app/cache.php

diff --git a/app/cache.php b/app/cache.php
new file mode 100644
index 0000000..69eee48
--- /dev/null
+++ b/app/cache.php
@@ -0,0 +1,27 @@
+<?php
+
+function getCachedMarkdown(string $filePath): ?string {
+    $cacheDir = '/tmp/folderweb_cache';
+    $mtime = filemtime($filePath);
+    $cacheKey = md5($filePath . $mtime);
+    $cachePath = "$cacheDir/$cacheKey";
+    
+    if (file_exists($cachePath)) {
+        return file_get_contents($cachePath);
+    }
+    
+    return null;
+}
+
+function setCachedMarkdown(string $filePath, string $html): void {
+    $cacheDir = '/tmp/folderweb_cache';
+    if (!is_dir($cacheDir)) {
+        mkdir($cacheDir, 0755, true);
+    }
+    
+    $mtime = filemtime($filePath);
+    $cacheKey = md5($filePath . $mtime);
+    $cachePath = "$cacheDir/$cacheKey";
+    
+    file_put_contents($cachePath, $html);
+}
diff --git a/app/rendering.php b/app/rendering.php
index 85c0752..cd7f739 100644
--- a/app/rendering.php
+++ b/app/rendering.php
@@ -5,10 +5,19 @@ function renderContentFile(string $filePath): string {
     
     ob_start();
     if ($ext === 'md') {
-        if (!class_exists('Parsedown')) {
-            require_once __DIR__ . '/vendor/Parsedown.php';
+        require_once __DIR__ . '/cache.php';
+        $cached = getCachedMarkdown($filePath);
+        
+        if ($cached !== null) {
+            echo $cached;
+        } else {
+            if (!class_exists('Parsedown')) {
+                require_once __DIR__ . '/vendor/Parsedown.php';
+            }
+            $html = '<article>' . (new Parsedown())->text(file_get_contents($filePath)) . '</article>';
+            setCachedMarkdown($filePath, $html);
+            echo $html;
         }
-        echo '<article>' . (new Parsedown())->text(file_get_contents($filePath)) . '</article>';
     } elseif (in_array($ext, ['html', 'php'])) {
         include $filePath;
     }