4 files changed, 59 insertions, 2 deletions
diff --git a/src/AbstractStrategy.php b/src/AbstractStrategy.php
new file mode 100644
index 0000000..54b78c1
--- /dev/null
+++ b/src/AbstractStrategy.php
@@ -0,0 +1,32 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Lightscale\Router;
+
+use Lightscale\Router\Contracts\Middleware;
+use Lightscale\Router\Contracts\Strategy;
+use Psr\Http\Message\RequestInterface;
+use Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\ServerRequestInterface;
+
+abstract class AbstractStrategy implements Strategy
+{
+    /**
+     * @param Middleware[]                                  $middlewares
+     * @param callable(RequestInterface): ResponseInterface $handler
+     */
+    public function runMiddleware(
+        RequestInterface $request,
+        array $middlewares,
+        callable $handler,
+    ): ResponseInterface {
+        $handler = count($middlewares) > 0 ? array_reduce(
+            array_reverse($middlewares),
+            fn (callable $handler, Middleware $middleware) => fn (ServerRequestInterface $request) => $middleware->handle($request, $handler),
+            $handler
+        ) : $handler;
+
+        return $handler($request);
+    }
+}
diff --git a/src/BasicStrategy.php b/src/BasicStrategy.php
index 5043576..d2ee91a 100644
--- a/src/BasicStrategy.php
+++ b/src/BasicStrategy.php
@@ -4,13 +4,12 @@ declare(strict_types=1);
 
 namespace Lightscale\Router;
 
-use Lightscale\Router\Contracts\Strategy;
 use Lightscale\Router\Exceptions\InvalidResponseException;
 use Lightscale\Router\Exceptions\NotFoundException;
 use Psr\Http\Message\RequestInterface;
 use Psr\Http\Message\ResponseInterface;
 
-class BasicStrategy implements Strategy
+class BasicStrategy extends AbstractStrategy
 {
     public function runRoute(RouteCall $call): ResponseInterface
     {
diff --git a/src/Contracts/Middleware.php b/src/Contracts/Middleware.php
new file mode 100644
index 0000000..96037c8
--- /dev/null
+++ b/src/Contracts/Middleware.php
@@ -0,0 +1,16 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Lightscale\Router\Contracts;
+
+use Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\ServerRequestInterface;
+
+interface Middleware
+{
+    public function handle(
+        ServerRequestInterface $request,
+        callable $next,
+    ): ResponseInterface;
+}
diff --git a/src/Contracts/Strategy.php b/src/Contracts/Strategy.php
index bb877c1..fa41819 100644
--- a/src/Contracts/Strategy.php
+++ b/src/Contracts/Strategy.php
@@ -10,6 +10,16 @@ use Psr\Http\Message\ResponseInterface;
 
 interface Strategy
 {
+    /**
+     * @param Middleware[]                                  $middlewares
+     * @param callable(RequestInterface): ResponseInterface $handler
+     */
+    public function runMiddleware(
+        RequestInterface $request,
+        array $middlewares,
+        callable $handler,
+    ): ResponseInterface;
+
     public function runRoute(RouteCall $call): ResponseInterface;
 
     public function notFound(RequestInterface $request): ResponseInterface;