get and serve headers in Request

src/Request/Request.php

@@ -15,15 +15,24 @@ class Request implements IRequest
 
     private array $post;
 
+    private array $headers;
+
     private Session $session;
 
     private ?IUser $user = null;
 
-    public function __construct(string $base, array &$get, array &$post, array &$session, IUserRepository $userRepository)
+    public function __construct(
+        string $base,
+        array &$get,
+        array &$post,
+        array $headers,
+        array &$session,
+        IUserRepository $userRepository)
     {
         $this->base = $base;
         $this->get = &$get;
         $this->post = &$post;
+        $this->headers = $headers;
         $this->session = new Session($session);
 
         $userId = $this->session->get('userId');
@@ -64,6 +73,15 @@ class Request implements IRequest
         return null;
     }
 
+    public function header($key)
+    {
+        if (isset($this->headers[$key])) {
+            return $this->headers[$key];
+        }
+
+        return null;
+    }
+
     public function session(): ISession
     {
         return $this->session;