public Billing(IEnumerable <ITariff> tariffs)
{
Data = new BillingUnit();
PhoneManagement = new PhoneManagement(Data);
BalanceOperation = new BalanceOperation(PhoneManagement);
CallManagement = new CallManagement(Data, PhoneManagement);
Tariffs = tariffs;
}
public void PutCallOnRecord(object sender, ICall call)
{
CallManagement.PutCallOnRecord(call); // checks if call was answered and then record information about it (start and end time, duration etc.)
BalanceOperation.ReduceBalance(call.SenderPhoneNumber, CallManagement.CalculateCostOfCall(call)); // extract some ammout of money considering tariff and duration of a call
}
