master details part 3

public class CustomerSummaryDenormaliser : 
        IHandle<CustomerCreated>,
        IHandle<OrderPlaced>
{
    private readonly CustomerSummaryDto _summaryDto;

    public CustomerSummaryDenormaliser(CustomerSummaryDto summaryDto)
    {
        _summaryDto = summaryDto;
    }

    public void Handle(CustomerCreated evt)
    {
        // Get from database 
        // var _summaryDto = repo.GetById(evt.Id);

        _summaryDto.Id = evt.Id;
        _summaryDto.Name = evt.CustomerName;
    }

    public void Handle(OrderPlaced orderPlaced)
    {
        // Get from database 
        // var _summaryDto = repo.GetById(evt.Id);

        _summaryDto.Orders.Add(orderPlaced);
        _summaryDto.RunningTotal += orderPlaced.OrderTotal;
        if (_summaryDto.Orders.Count > 10)
        {
            _summaryDto.RunningTotal -= _summaryDto.Orders[0].OrderTotal;
            _summaryDto.Orders.RemoveAt(0);
        }

        // Save the dto to the db
    }
}