From 455084b2843ad1565401cb4b3bb0d89e2b055649 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Christoph=20R=C3=B6nsch?= <christoph.roensch@arcor.de>
Date: Sat, 1 Oct 2022 22:23:52 +0200
Subject: [PATCH] Minify_Cache_APCu replaces APC

---
 lib/Minify/Cache/APC.php      |   2 +
 lib/Minify/Cache/APCu.php     | 136 ++++++++++++++++++++++++++++++++++
 tests/MinifyCacheAPCTest.php  |   1 -
 tests/MinifyCacheAPCuTest.php |  25 +++++++
 4 files changed, 163 insertions(+), 1 deletion(-)
 create mode 100644 lib/Minify/Cache/APCu.php
 create mode 100644 tests/MinifyCacheAPCuTest.php

diff --git a/lib/Minify/Cache/APC.php b/lib/Minify/Cache/APC.php
index 85a0b49..79ddf46 100644
--- a/lib/Minify/Cache/APC.php
+++ b/lib/Minify/Cache/APC.php
@@ -13,6 +13,8 @@
  *
  * @package Minify
  * @author Chris Edwards
+ * 
+ * @deprecated Use Minify_Cache_APCu
  **/
 class Minify_Cache_APC implements Minify_CacheInterface
 {
diff --git a/lib/Minify/Cache/APCu.php b/lib/Minify/Cache/APCu.php
new file mode 100644
index 0000000..170b3f2
--- /dev/null
+++ b/lib/Minify/Cache/APCu.php
@@ -0,0 +1,136 @@
+<?php
+/**
+ * Class Minify_Cache_APCu
+ * @package Minify
+ */
+
+/**
+ * APCu-based cache class for Minify
+ *
+ * <code>
+ * Minify::setCache(new Minify_Cache_APCu());
+ * </code>
+ *
+ * @package Minify
+ * @author Chris Edwards
+ **/
+class Minify_Cache_APCu implements Minify_CacheInterface
+{
+
+    /**
+     * Create a Minify_Cache_APCu object, to be passed to
+     * Minify::setCache().
+     *
+     *
+     * @param int $expire seconds until expiration (default = 0
+     * meaning the item will not get an expiration date)
+     *
+     * @return null
+     */
+    public function __construct($expire = 0)
+    {
+        $this->_exp = $expire;
+    }
+
+    /**
+     * Write data to cache.
+     *
+     * @param string $id cache id
+     *
+     * @param string $data
+     *
+     * @return bool success
+     */
+    public function store($id, $data)
+    {
+        return apcu_store($id, "{$_SERVER['REQUEST_TIME']}|{$data}", $this->_exp);
+    }
+
+    /**
+     * Get the size of a cache entry
+     *
+     * @param string $id cache id
+     *
+     * @return int size in bytes
+     */
+    public function getSize($id)
+    {
+        if (! $this->_fetch($id)) {
+            return false;
+        }
+
+        if (function_exists('mb_strlen') && ((int)ini_get('mbstring.func_overload') & 2)) {
+            return mb_strlen($this->_data, '8bit');
+        } else {
+            return strlen($this->_data);
+        }
+    }
+
+    /**
+     * Does a valid cache entry exist?
+     *
+     * @param string $id cache id
+     *
+     * @param int $srcMtime mtime of the original source file(s)
+     *
+     * @return bool exists
+     */
+    public function isValid($id, $srcMtime)
+    {
+        return ($this->_fetch($id) && ($this->_lm >= $srcMtime));
+    }
+
+    /**
+     * Send the cached content to output
+     *
+     * @param string $id cache id
+     */
+    public function display($id)
+    {
+        echo $this->_fetch($id) ? $this->_data : '';
+    }
+
+    /**
+     * Fetch the cached content
+     *
+     * @param string $id cache id
+     *
+     * @return string
+     */
+    public function fetch($id)
+    {
+        return $this->_fetch($id) ? $this->_data : '';
+    }
+
+    private $_exp = null;
+
+    // cache of most recently fetched id
+    private $_lm = null;
+    private $_data = null;
+    private $_id = null;
+
+    /**
+     * Fetch data and timestamp from apcu, store in instance
+     *
+     * @param string $id
+     *
+     * @return bool success
+     */
+    private function _fetch($id)
+    {
+        if ($this->_id === $id) {
+            return true;
+        }
+        $ret = apcu_fetch($id);
+        if (false === $ret) {
+            $this->_id = null;
+
+            return false;
+        }
+
+        list($this->_lm, $this->_data) = explode('|', $ret, 2);
+        $this->_id = $id;
+
+        return true;
+    }
+}
diff --git a/tests/MinifyCacheAPCTest.php b/tests/MinifyCacheAPCTest.php
index 15b3b69..0f31b82 100644
--- a/tests/MinifyCacheAPCTest.php
+++ b/tests/MinifyCacheAPCTest.php
@@ -9,7 +9,6 @@ class MinifyCacheAPCTest extends TestCase
     public function setUp()
     {
         if (!function_exists('apc_store')) {
-            // FIXME: is APCu extension ok too?
             $this->markTestSkipped("To test this component, install APC extension");
         }
     }
diff --git a/tests/MinifyCacheAPCuTest.php b/tests/MinifyCacheAPCuTest.php
new file mode 100644
index 0000000..187dc06
--- /dev/null
+++ b/tests/MinifyCacheAPCuTest.php
@@ -0,0 +1,25 @@
+<?php
+
+namespace Minify\Test;
+
+use Minify_Cache_APCu;
+
+class MinifyCacheAPCuTest extends TestCase
+{
+    public function setUp()
+    {
+        if (!function_exists('apcu_store')) {
+            $this->markTestSkipped("To test this component, install APCu extension");
+        }
+        ini_set('apc.enable_cli', 1);
+    }
+
+    public function test1()
+    {
+        $data = str_repeat(md5(time()) . 'í', 100); // 3400 bytes in UTF-8
+        $id = 'Minify_test_cache';
+
+        $cache = new Minify_Cache_APCu();
+        $this->assertTestCache($cache, $id, $data);
+    }
+}