Creating an intermediate MiddlewareController that makes any middleware act like a normal controller

Author: Ocramius

src/Controller/MiddlewareController.php

@@ -0,0 +1,83 @@
+<?php
+/**
+ * Zend Framework (http://framework.zend.com/)
+ *
+ * @link      http://github.com/zendframework/zf2 for the canonical source repository
+ * @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license   http://framework.zend.com/license/new-bsd New BSD License
+ */
+
+namespace Zend\Mvc\Controller;
+
+use Zend\EventManager\EventManager;
+use Zend\Http\Request;
+use Zend\Http\Response;
+use Zend\Mvc\Exception\RuntimeException;
+use Zend\Mvc\MvcEvent;
+use Zend\Psr7Bridge\Psr7Response;
+use Zend\Psr7Bridge\Psr7ServerRequest;
+use Zend\Router\RouteMatch;
+
+/**
+ * Note: I'm a terrible person
+ *
+ * @internal don't use this in your codebase, or else @ocramius will hunt you down. This is just an internal
+ * @internal hack to make middleware trigger 'dispatch' events attached to the DispatchableInterface identifier.
+ */
+final class MiddlewareController extends AbstractController
+{
+    /**
+     * @var callable
+     */
+    private $middleware;
+
+    public function __construct(callable $middleware, EventManager $eventManager, MvcEvent $event)
+    {
+        $this->eventIdentifier = __CLASS__;
+        $this->middleware      = $middleware;
+
+        $this->setEventManager($eventManager);
+        $this->setEvent($event);
+    }
+
+    /**
+     * {@inheritDoc}
+     * @throws \Zend\Mvc\Exception\RuntimeException
+     */
+    public function onDispatch(MvcEvent $e)
+    {
+        $request  = $this->request;
+        $response = $this->response;
+
+        if (! $request instanceof Request) {
+            throw new RuntimeException(sprintf(
+                'Expected request to be a %s, %s given',
+                Request::class,
+                get_class($request)
+            ));
+        }
+
+        if (! $response instanceof Response) {
+            throw new RuntimeException(sprintf(
+                'Expected response to be a %s, %s given',
+                Response::class,
+                get_class($response)
+            ));
+        }
+
+        $routeMatch  = $e->getRouteMatch();
+        $psr7Request = Psr7ServerRequest::fromZend($request)->withAttribute(RouteMatch::class, $routeMatch);
+
+        if ($routeMatch) {
+            foreach ($routeMatch->getParams() as $key => $value) {
+                $psr7Request = $psr7Request->withAttribute($key, $value);
+            }
+        }
+
+        $result = \call_user_func($this->middleware, $psr7Request, Psr7Response::fromZend($response));
+
+        $e->setResult($result);
+
+        return $result;
+    }
+}