static void Main(string[] args)
{
var exchangeHouse = new ExchangeHouse();
ICurrencyConverter currencyConverter = null;
while (true)
{
#region Getting Amount in Dollars and Currency to Convert
Console.WriteLine("Enter how much Dollars you have");
Console.WriteLine(Environment.NewLine);
var amountInDollar = Convert.ToDecimal(Console.ReadLine());
Console.WriteLine("Which Currency do you need ?");
Console.WriteLine("Type 'EUR' for Euro");
Console.WriteLine(Environment.NewLine);
Console.WriteLine("Type 'BRL' for Brazilian Real");
Console.WriteLine(Environment.NewLine);
var currency = Console.ReadLine().ToUpper();
#endregion
#region Getting Specific Converter
switch (currency)
{
case "BRL":
currencyConverter = new BrazilianCurrencyConverter();
break;
case "EUR":
currencyConverter = new EuroCurrencyConverter();
break;
default:
{
//Here Using the Null Object Representation
currencyConverter = NullCurrencyConverter.GetNullCurrencyConverter();
}
break;
}
#endregion
exchangeHouse.SetCurrency(currencyConverter);
var exchangedMoney = exchangeHouse.CashConvertedCurrency(amountInDollar);
Console.WriteLine(string.Format("You now have {0} in {1}", exchangedMoney.ToString("C"), currency));
Console.WriteLine(Environment.NewLine);
}
}
public static NullCurrencyConverter GetNullCurrencyConverter()
{
//Using Singleton - Not necessary to have multiple instances of the same class with no behaviour
return(nullCurrencyConverter = (nullCurrencyConverter ?? new NullCurrencyConverter()));
}
