PHP7 Chain Of Responsibilities

Behavioral/ChainOfResponsibilities/Responsible/HttpInMemoryCacheHandler.php

@@ -0,0 +1,45 @@
+<?php
+
+namespace DesignPatterns\Behavioral\ChainOfResponsibilities\Responsible;
+
+use DesignPatterns\Behavioral\ChainOfResponsibilities\Handler;
+use Psr\Http\Message\RequestInterface;
+
+class HttpInMemoryCacheHandler extends Handler
+{
+    /**
+     * @var array
+     */
+    private $data;
+
+    /**
+     * @param array $data
+     * @param Handler|null $successor
+     */
+    public function __construct(array $data, Handler $successor = null)
+    {
+        parent::__construct($successor);
+
+        $this->data = $data;
+    }
+
+    /**
+     * @param RequestInterface $request
+     *
+     * @return string|null
+     */
+    protected function processing(RequestInterface $request)
+    {
+        $key = sprintf(
+            '%s?%s',
+            $request->getUri()->getPath(),
+            $request->getUri()->getQuery()
+        );
+
+        if ($request->getMethod() == 'GET' && isset($this->data[$key])) {
+            return $this->data[$key];
+        }
+
+        return null;
+    }
+}