OrderController.cs

OrderController.cs

[ApiController]
[Route("[controller]")]
public class OrderController : ControllerBase
{
    private readonly OrderApiGateway orderGateway;

    public OrderController(OrderApiGateway orderGateway)
    {
        this.orderGateway = orderGateway;
    }

    [HttpGet]
    public IActionResult Get()
    {
        var orderNumber = orderGateway.GetOrderNumber();
        return Ok($"Your order number is {orderNumber}");
    }
}