OrderManager.cs

namespace OrderProcessing;

public class OrderManager
{
    private readonly IServiceLocator _serviceLocator;
    private readonly Logger _logger;

    public OrderManager(IServiceLocator serviceLocator)
    {
        _serviceLocator = serviceLocator;
        _logger = _serviceLocator.GetService<Logger>();
    }

    public void ProcessOrder(Order order)
    {
        _logger.Log("Processing new order...");

        var totalPrice = order.UnitPrice * order.Quantity;

        var paymentProcessor = _serviceLocator.GetService<PaymentProcessor>();
        var isPaymentSuccessful = paymentProcessor.ProcessPayment(totalPrice);

        NotifyCustomer(isPaymentSuccessful);
    }

    private void NotifyCustomer(bool isPaymentSuccessful)
    {
        var notifier = _serviceLocator.GetService<NotificationManager>();
        if (isPaymentSuccessful)
        {
            notifier.NotifyCustomer("Payment succeeded");
            return;
        }

        notifier.NotifyCustomer("Payment failed");
        _logger.Log("Payment failed");
    }
}