public User BuyCurrency(BuyCurrencyCommand command)
{
buyCurrencyValidator.ValidateCanBuyCurrency(command);
ChargeCantorCosts(command);
ChargeUserCosts(command);
AddOrUpdateUserCurrencyAmount(command);
return(command.User);
}
private void AddNewCurrency(BuyCurrencyCommand command)
{
if (command.User.Currencies == null)
{
command.User.Currencies = new List <WalletCurrency>();
}
var userCurrency = walletCurrencyFactory.Create(command.Currency, command.User, command.Amount);
command.User.Currencies.Add(userCurrency);
}
private void AddOrUpdateUserCurrencyAmount(BuyCurrencyCommand command)
{
if (command.UserCurrency == null)
{
AddNewCurrency(command);
}
else
{
EditCurrencyAmount(command);
}
}
public bool ValidateCanBuyCurrency(BuyCurrencyCommand command)
{
transactionValidator.ValidateTransaction(command);
if (HasUserNotEnoughFunds(command))
{
throw new BuyCurrencyException("User doesn't have enough funds");
}
if (HasCantorNotEnoughCurrencyAmount(command))
{
throw new BuyCurrencyException("Cantor doesn't have enough currency amount");
}
return(true);
}
private void EditCurrencyAmount(BuyCurrencyCommand command)
{
command.UserCurrency.Amount += command.Amount;
}
private void ChargeUserCosts(BuyCurrencyCommand command)
{
command.User.Money -= command.UserMoneyCosts;
}
private void ChargeCantorCosts(BuyCurrencyCommand command)
{
command.CantorCurrency.Amount -= command.Amount;
}
private bool HasUserNotEnoughFunds(BuyCurrencyCommand command)
{
return(command.User.Money < command.UserMoneyCosts);
}
private bool HasCantorNotEnoughCurrencyAmount(BuyCurrencyCommand command)
{
return(command.CantorCurrency.Amount < command.Amount);
}
