From 0002543cca1ac01573ee24175c7441600b3448e3 Mon Sep 17 00:00:00 2001
From: slawkens <slawkens@gmail.com>
Date: Sat, 18 Feb 2023 08:53:42 +0100
Subject: [PATCH] feature: Cache::remember($key, $ttl, $callback) + example
 usage

---
 system/libs/cache.php    | 17 +++++++++++++++++
 system/pages/gallery.php |  9 +++++----
 2 files changed, 22 insertions(+), 4 deletions(-)

diff --git a/system/libs/cache.php b/system/libs/cache.php
index 880c33c7..55c17a17 100644
--- a/system/libs/cache.php
+++ b/system/libs/cache.php
@@ -110,4 +110,21 @@ class Cache
 	 * @return bool
 	 */
 	public function enabled() {return false;}
+
+	public static function remember($key, $ttl, $callback)
+	{
+		$cache = self::getInstance();
+		if(!$cache->enabled()) {
+			return $callback();
+		}
+
+		$value = null;
+		if ($cache->fetch($key, $value)) {
+			return unserialize($value);
+		}
+
+		$value = $callback();
+		$cache->set($key, serialize($value),$ttl);
+		return $value;
+	}
 }
diff --git a/system/pages/gallery.php b/system/pages/gallery.php
index 8cbf3975..c893ce90 100644
--- a/system/pages/gallery.php
+++ b/system/pages/gallery.php
@@ -101,14 +101,15 @@ if(isset($_GET['image']))
 	return;
 }
 
-$images =
-	$db->query('SELECT `id`, `comment`, `image`, `author`, `thumb`' .
+$images = Cache::remember('gallery_' . ($canEdit ? '1' : '0'), 60, function () use ($db, $canEdit) {
+	return $db->query('SELECT `id`, `comment`, `image`, `author`, `thumb`' .
 		($canEdit ? ', `hidden`, `ordering`' : '') .
 		' FROM `' . TABLE_PREFIX . 'gallery`' .
 		(!$canEdit ? ' WHERE `hidden` != 1' : '') .
-		' ORDER BY `ordering`;');
+		' ORDER BY `ordering`;')->fetchAll(PDO::FETCH_ASSOC);
+});
 
-$last = $images->rowCount();
+$last = count($images);
 if(!$last)
 {
 ?>