/// <summary>
/// Create a new instance of ThroughExchange
/// </summary>
/// <param name="initialCurrency">Initial currency to change</param>
/// <param name="targetCurrency">Target currency to expected</param>
/// <param name="throughExchange"></param>
/// <param name="availableExchangeExcludeCurrent">All avalaible exchange currency to chain with current</param>
/// <returns>Return new Direct Exchange</returns>
public static IExchangeChain Create(IExchangeCurrency throughExchange, string initialCurrency, string targetCurrency, IList <IExchangeCurrency> availableExchangeExcludeCurrent)
{
string changeTo;
if (!throughExchange.CanChangeFrom(initialCurrency, out changeTo))
{
return(null);
}
var factory = new ExchangeChainFactory(availableExchangeExcludeCurrent);
var nextExchange = factory.Create(changeTo, targetCurrency);
if (nextExchange == null)
{
return(null);
}
return(new ThroughExchange
{
_initialCurrency = initialCurrency,
_intermediateCurrency = changeTo,
_throughExchange = throughExchange,
_nextExchange = nextExchange
});
}
/// <summary>
/// Change money with current rate
/// </summary>
/// <param name="initialCurrency">Name of initial currency of a change</param>
/// <param name="targetCurrency">Name target currency of a change</param>
/// <param name="amount">Amount of money to change</param>
/// <returns>Changed money</returns>
public int Change(string initialCurrency, string targetCurrency, int amount)
{
if (AvailableExchangeCurrency.Count == 0)
{
throw new NotSupportedException(string.Format("Bank can not change from {0} to {1}. None exchange currency available.", initialCurrency, targetCurrency));
}
var chainFactory = new ExchangeChainFactory(AvailableExchangeCurrency);
var exchangeChain = chainFactory.Create(initialCurrency, targetCurrency);
if (exchangeChain == null)
{
throw new NotSupportedException(string.Format("Bank can not change from {0} to {1}. None exchange currency corresponds to request change.", initialCurrency, targetCurrency));
}
return(RoundChangeToInteger(exchangeChain.Change(amount)));
}
