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  1. <?php
  2.  
  3.  
  4. bootstrap();
  5. function bootstrap()
  6. {
  7.     // Инициализируем всё.
  8.     $users = new UserStore();
  9.     $userCarts = new UserCartStore();
  10.     $products = new ProductStore();
  11.     $controller = new CartController(
  12.         $users,
  13.         $userCarts,
  14.         $products
  15.     );
  16.     $httpHandler = new HttpCartHandler(
  17.         $controller
  18.     );
  19.     $router = new Router();
  20.  
  21.     // Настраиваем роутер.
  22.     $router->onNothing(static function () {
  23.         print 'Unexpected route';
  24.     });
  25.     $router->addRoute('/cart/add', static function () use ($httpHandler) {
  26.         $httpHandler->addProductToCart();
  27.     });
  28.  
  29.     // Запускаем роутер, он вызовет хендлер, тот контроллер, а тот базы данных.
  30.     $router->route($_SERVER['REQUEST_URI']); // REQUEST_URI - это не совсем то, я для примера написал.
  31. }
  32.  
  33. class Router
  34. {
  35.     protected $routes = [];
  36.     protected $onNothing;
  37.  
  38.     public function addRoute($path, callable $callback)
  39.     {
  40.         $this->routes[$path] = $callback;
  41.     }
  42.  
  43.     public function onNothing(callable $callback)
  44.     {
  45.         $this->onNothing = $callback;
  46.     }
  47.  
  48.     public function route($path)
  49.     {
  50.         if (!empty($this->routes[$path])) {
  51.             $this->routes[$path]();
  52.         } elseif (!empty($this->onNothing)) {
  53.             ($this->onNothing)();
  54.         } else {
  55.             throw new Exception('No "nothing" callback was configured');
  56.         }
  57.     }
  58.  
  59. }
  60.  
  61.  
  62. class HttpCartHandler
  63. {
  64.  
  65.     /** @var CartController */
  66.     protected $cartController;
  67.  
  68.     public function __construct(CartController $cartController)
  69.     {
  70.         $this->cartController = $cartController;
  71.     }
  72.  
  73.     public function addProductToCart()
  74.     {
  75.         $userId = $_POST['user_id'] ?? null;
  76.         $productId = $_POST['product_id'] ?? null;
  77.  
  78.         try {
  79.             $this->cartController->addProductToCart(
  80.                 $userId,
  81.                 $productId
  82.             );
  83.             print 'Successfully added'; // Для принтов по идее нужен отдельный класс-Renderer;
  84.         } catch (InvalidArgumentException $e) {
  85.             print 'Invalid argument: ' . $e->getMessage();
  86.         } catch (\Throwable $e) {
  87.             error_log((string) $e);
  88.             print 'Internal error';
  89.         }
  90.     }
  91. }
  92.  
  93. class CartController
  94. {
  95.     // В реальном коде тут были бы интерфейсы, я же пока захардкодил сразу классы.
  96.     /** @var UserStore */
  97.     protected $users;
  98.     /** @var UserCartStore */
  99.     protected $userCarts;
  100.     /** @var ProductStore */
  101.     protected $products;
  102.  
  103.     /**
  104.      * @param UserStore $users
  105.      * @param UserCartStore $userCarts
  106.      * @param ProductStore $products
  107.      */
  108.     public function __construct($users, $userCarts, $products)
  109.     {
  110.         $this->users = $users;
  111.         $this->userCarts = $userCarts;
  112.         $this->products = $products;
  113.     }
  114.  
  115.     public function addProductToCart($userId, $productId)
  116.     {
  117.         $user = $this->users->load($userId);
  118.         if ($user === null) {
  119.             throw new InvalidArgumentException('invalid user id');
  120.         }
  121.         $product = $this->products->load($productId);
  122.         if ($product === null) {
  123.             throw new InvalidArgumentException('invalid product id');
  124.         }
  125.  
  126.         $this->userCarts->addProduct($userId, $productId);
  127.     }
  128. }
  129.  
  130. class UserCartStore
  131. {
  132.     public function addProduct($userId, $productId)
  133.     {
  134.  
  135.     }
  136. }
  137.  
  138. class UserStore
  139. {
  140.     public function load($userId)
  141.     {
  142.  
  143.     }
  144. }
  145.  
  146. class ProductStore
  147. {
  148.     public function load($productId)
  149.     {
  150.  
  151.     }
  152. }
  153.  
Success #stdin #stdout #stderr 0.02s 24444KB
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Unexpected route
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PHP Notice:  Undefined index: REQUEST_URI in /home/ejpRTD/prog.php on line 30
https://ideone.com/qtYObS
language:
PHP (php 7.3.5)
created:
4 years ago
visibility:
public

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