From fe57edd9e87832dbd14ea8ffd2dc2f16ac1ceb6f Mon Sep 17 00:00:00 2001
From: Frederic Guillot <fred@kanboard.net>
Date: Sun, 20 Sep 2015 12:38:35 -0400
Subject: Add abstract cache layer

---
 app/Core/Cache/Base.php           | 38 +++++++++++++++++++++++
 app/Core/Cache/CacheInterface.php | 45 +++++++++++++++++++++++++++
 app/Core/Cache/MemoryCache.php    | 65 +++++++++++++++++++++++++++++++++++++++
 3 files changed, 148 insertions(+)
 create mode 100644 app/Core/Cache/Base.php
 create mode 100644 app/Core/Cache/CacheInterface.php
 create mode 100644 app/Core/Cache/MemoryCache.php

(limited to 'app/Core/Cache')

diff --git a/app/Core/Cache/Base.php b/app/Core/Cache/Base.php
new file mode 100644
index 00000000..a16c12f0
--- /dev/null
+++ b/app/Core/Cache/Base.php
@@ -0,0 +1,38 @@
+<?php
+
+namespace Core\Cache;
+
+/**
+ * Base class for cache drivers
+ *
+ * @package  cache
+ * @author   Frederic Guillot
+ */
+abstract class Base
+{
+    /**
+     * Proxy cache
+     *
+     * Note: Arguments must be scalar types
+     *
+     * @access public
+     * @param  string    $class        Class instance
+     * @param  string    $method       Container method
+     * @return mixed
+     */
+    public function proxy($class, $method)
+    {
+        $args = func_get_args();
+        array_shift($args);
+
+        $key = 'proxy:'.get_class($class).':'.implode(':', $args);
+        $result = $this->get($key);
+
+        if ($result === null) {
+            $result = call_user_func_array(array($class, $method), array_splice($args, 1));
+            $this->set($key, $result);
+        }
+
+        return $result;
+    }
+}
diff --git a/app/Core/Cache/CacheInterface.php b/app/Core/Cache/CacheInterface.php
new file mode 100644
index 00000000..8675ef8e
--- /dev/null
+++ b/app/Core/Cache/CacheInterface.php
@@ -0,0 +1,45 @@
+<?php
+
+namespace Core\Cache;
+
+/**
+ * Cache Interface
+ *
+ * @package  cache
+ * @author   Frederic Guillot
+ */
+interface CacheInterface
+{
+    /**
+     * Save a new value in the cache
+     *
+     * @access public
+     * @param  string  $key
+     * @param  string  $value
+     */
+    public function set($key, $value);
+
+    /**
+     * Fetch value from cache
+     *
+     * @access public
+     * @param  string  $key
+     * @return mixed            Null when not found, cached value otherwise
+     */
+    public function get($key);
+
+    /**
+     * Clear all cache
+     *
+     * @access public
+     */
+    public function flush();
+
+    /**
+     * Remove cached value
+     *
+     * @access public
+     * @param  string  $key
+     */
+    public function remove($key);
+}
diff --git a/app/Core/Cache/MemoryCache.php b/app/Core/Cache/MemoryCache.php
new file mode 100644
index 00000000..b1de96bc
--- /dev/null
+++ b/app/Core/Cache/MemoryCache.php
@@ -0,0 +1,65 @@
+<?php
+
+namespace Core\Cache;
+
+/**
+ * Memory Cache
+ *
+ * @package  cache
+ * @author   Frederic Guillot
+ */
+class MemoryCache extends Base implements CacheInterface
+{
+    /**
+     * Container
+     *
+     * @access private
+     * @var array
+     */
+    private $storage = array();
+
+    /**
+     * Save a new value in the cache
+     *
+     * @access public
+     * @param  string  $key
+     * @param  string  $value
+     */
+    public function set($key, $value)
+    {
+        $this->storage[$key] = $value;
+    }
+
+    /**
+     * Fetch value from cache
+     *
+     * @access public
+     * @param  string  $key
+     * @return mixed            Null when not found, cached value otherwise
+     */
+    public function get($key)
+    {
+        return isset($this->storage[$key]) ? $this->storage[$key] : null;
+    }
+
+    /**
+     * Clear all cache
+     *
+     * @access public
+     */
+    public function flush()
+    {
+        $this->storage = array();
+    }
+
+    /**
+     * Remove cached value
+     *
+     * @access public
+     * @param  string  $key
+     */
+    public function remove($key)
+    {
+        unset($this->storage[$key]);
+    }
+}
-- 
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