Fix routing issues

index.php

@@ -9,9 +9,9 @@ $request = new Request($_SERVER);
 $handler = new RequestHandler($request);
 
 $handler->registerRoutes([
-    new Route('GET', 'products', ['ProductList\View\Product', 'listAll'])
+    new Route('GET', 'products', ['ProductList\View\Product', 'listAll']),
+    new Route('GET', 'add-product', function() { readfile('add-product.html'); }),
+    new Route('GET', '', function() { readfile('index.html'); }),
 ]);
 
-$handler->setIndex('index.html');
-
 $handler->handle();

src/Http/RequestHandler.php

@@ -3,7 +3,6 @@ namespace ProductList\Http;
 
 class RequestHandler
 {
-    private $index;
     private $request;
     private $routes;
 
@@ -12,11 +11,6 @@ class RequestHandler
         $this->request = $request;
     }
 
-    public function setIndex($index)
-    {
-        $this->index = $index;
-    }
-
     public function registerRoutes(array $routes)
     {
         $this->routes = $routes;
@@ -31,6 +25,6 @@ class RequestHandler
             }
         }
 
-        readfile($this->index);
+        http_response_code(404);
     }
 }

src/Http/Route.php

@@ -7,7 +7,7 @@ class Route
     private $uri;
     private $view;
 
-    public function __construct(string $method, string $uri, array $view)
+    public function __construct(string $method, string $uri, array|\Closure $view)
     {
         $this->method = $method;
         $this->uri = $uri;
@@ -21,6 +21,10 @@ class Route
 
     public function execute(Request $request)
     {
-        call_user_func($this->view, $request);
+        if (is_array($this->view)) {
+            call_user_func($this->view, $request);
+        } else {
+            $this->view->call($this);
+        }
     }
 }