static void Main(string[] args)
{
//create handlers
var bills50s = new CurrencyBill(50, 1);
var bills20s = new CurrencyBill(20, 2);
var bills10s = new CurrencyBill(10, 5);
//set handlers pipeline
bills50s.RegisterNext(bills20s)
.RegisterNext(bills10s);
//client code that uses handler
while (true)
{
Console.WriteLine("Please enter amount to dispense:");
var isParsed = int.TryParse(Console.ReadLine(), out var amount);
if (isParsed)
{
//sender pass the request to first handler in the pipeline
var isDepensible = bills50s.DispenseRequest(amount);
if (isDepensible)
{
Console.WriteLine($"Your amount ${amount} is dispensable!");
}
else
{
Console.WriteLine($"Failed to dispense ${amount}!");
}
}
else
{
Console.WriteLine("Please enter a valid amount to dispense");
}
}
}
//Method that set next handler in the pipeline
public CurrencyBill RegisterNext(CurrencyBill currencyBill)
{
next = currencyBill;
return(next);
}
//A static contructor that initialize static Zero property
//This property is used as default next handler instead of null object
static CurrencyBill()
{
Zero = new ZeroCurrencyBill();
}
