public Transaction Transfer(Account accountToDebit, Account accountToCredit, double valueToTransfer)
{
ValidateTransfer(accountToDebit, accountToCredit, valueToTransfer);
using (var transScope = new TransactionScope())
{
accountToDebit.Debit(valueToTransfer);
accountToCredit.Credit(valueToTransfer);
var transaction = new Transaction(accountToDebit, accountToCredit, valueToTransfer);
AccountRepository.Save(accountToDebit);
AccountRepository.Save(accountToCredit);
BankStatementRepository.RegisterTransaction(transaction);
transScope.Complete();
return transaction;
}
}
private static void ValidateTransfer(Account accountToDebit, Account accountToCredit, double valueToTransfer)
{
if (!accountToDebit.IsPossibleDebit()) throw new Exception("This account cannot be debit");
if (!accountToCredit.IsPossibleCredit()) throw new Exception("This account cannot be credit");
if (!valueToTransfer.ValueIsValidToTransfer()) throw new Exception("The value should be greater than zero");
}