reworked the Mediator pattern

Behavioral/Mediator/UserRepositoryUiMediator.php

@@ -0,0 +1,35 @@
+<?php declare(strict_types=1);
+
+namespace DesignPatterns\Behavioral\Mediator;
+
+class UserRepositoryUiMediator implements Mediator
+{
+    /**
+     * @var UserRepository
+     */
+    private $userRepository;
+
+    /**
+     * @var Ui
+     */
+    private $ui;
+
+    public function __construct(UserRepository $userRepository, Ui $ui)
+    {
+        $this->userRepository = $userRepository;
+        $this->ui = $ui;
+
+        $this->userRepository->setMediator($this);
+        $this->ui->setMediator($this);
+    }
+
+    public function printInfoAbout(string $user)
+    {
+        $this->ui->outputUserInfo($user);
+    }
+
+    public function getUser(string $username): string
+    {
+        return $this->userRepository->getUserName($username);
+    }
+}