public virtual PaymentStatisticIncrement GetPaymentChanges(PaymentStatusChangedMessage paymentChangeMsg)
{
if (paymentChangeMsg.StatusHistory.Count == 0)
{
return(null);
}
var increment = new PaymentStatisticIncrement();
// Update total count
PopulatePaymentTotalCounters(increment, paymentChangeMsg);
//skip message processing if current status is intermediate
if (!IsCurrentStatusFinal(paymentChangeMsg))
{
return(increment);
}
var sortedStatusHistories =
paymentChangeMsg.StatusHistory.OrderByDescending(x => x.PaymentStatusHistoryId).ToList();
var currentStatus = sortedStatusHistories[0].Status;
var previousFinalStatusHistory = sortedStatusHistories.Skip(1).FirstOrDefault(x => x.Status.IsFinal());
var previousStatus = previousFinalStatusHistory?.Status;
// Here we work with payments in final status ONLY!
PopulatePaymentSuccessCounters(increment, paymentChangeMsg, previousStatus, currentStatus);
return(increment);
}
private static void PopulatePaymentSuccessCounters(PaymentStatisticIncrement increment,
PaymentStatusChangedMessage paymentChangeMsg, string previousStatus, string currentStatus)
{
var sign = CalculatePaymentStatusIncrementSign(previousStatus, currentStatus);
increment.SuccessCount += sign;
increment.SuccessSum += sign * paymentChangeMsg.Payment.PaymentAmount;
increment.SuccessBaseSum += sign * paymentChangeMsg.Payment.BaseAmount;
}
private static void PopulatePaymentTotalCounters(PaymentStatisticIncrement increment, PaymentStatusChangedMessage paymentChangeMsg)
{
if (paymentChangeMsg.StatusHistory.Count == 1)
{
increment.TotalCount++;
increment.TotalSum = paymentChangeMsg.Payment.PaymentAmount;
increment.TotalBaseSum = paymentChangeMsg.Payment.BaseAmount;
}
}
