الگوهای طراحی PHP: نمای از راه دور

// UserService.php - Handles user-related details.
class UserService {
    public function getUserInfo($userId) {
        // Simulate fetching user data from a remote service.
        return [
            'id' => $userId,
            'name' => 'John Doe',
            'email' => 'john.doe@example.com',
        ];
    }
}

// OrderService.php - Handles order-related details.
class OrderService {
    public function getOrderDetails($orderId) {
        // Simulate fetching order details.
        return [
            'orderId' => $orderId,
            'status' => 'Shipped',
            'totalAmount' => 150.75,
        ];
    }
}

// InventoryService.php - Checks inventory levels.
class InventoryService {
    public function checkProductStock($productId) {
        // Simulate inventory stock check.
        return [
            'productId' => $productId,
            'stockLevel' => 42,
        ];
    }
}

// ECommerceFacade.php - The Remote Facade
class ECommerceFacade {
    private $userService;
    private $orderService;
    private $inventoryService;

    public function __construct() {
        $this->userService = new UserService();
        $this->orderService = new OrderService();
        $this->inventoryService = new InventoryService();
    }

    // Simplified method that aggregates data from all services.
    public function getUserDashboardData($userId, $orderId, $productId) {
        $userInfo = $this->userService->getUserInfo($userId);
        $orderDetails = $this->orderService->getOrderDetails($orderId);
        $stockInfo = $this->inventoryService->checkProductStock($productId);

        // Aggregating and returning a simplified response to the client.
        return [
            'user' => $userInfo,
            'order' => $orderDetails,
            'productStock' => $stockInfo,
        ];
    }
}

// Client code
$facade = new ECommerceFacade();
$dashboardData = $facade->getUserDashboardData(1, 1001, 2001);

echo "User Information: \n";
print_r($dashboardData['user']);

echo "\nOrder Details: \n";
print_r($dashboardData['order']);

echo "\nProduct Stock Info: \n";
print_r($dashboardData['productStock']);

User Information: 
Array
(
    [id] => 1
    [name] => John Doe
    [email] => john.doe@example.com
)

Order Details: 
Array
(
    [orderId] => 1001
    [status] => Shipped
    [totalAmount] => 150.75
)

Product Stock Info: 
Array
(
    [productId] => 2001
    [stockLevel] => 42
)