public async Task<Transaction> CreateTransaction(Book book, Transaction transaction)
{
DateTime timeStamp = DateTime.Now;
if (book == null) throw new PiggyBankDataException("Book object is missing");
if (transaction == null) throw new PiggyBankDataException("Transaction object is missing");
transaction.Book = book;
AccountManager acc = new AccountManager(_dbContext);
transaction.DebitAccount = await acc.FindAccount(transaction.DebitAccount.Id);
transaction.CreditAccount = await acc.FindAccount(transaction.CreditAccount.Id);
ValidateTransaction(transaction);
transaction.TimeStamp = timeStamp;
PiggyBankUtility.CheckMandatory(transaction);
_dbContext.Transactions.Add(transaction);
await _dbContext.SaveChangesAsync();
return transaction;
}
public async Task<Transaction> UpdateTransaction(Transaction transaction)
{
DateTime timeStamp = DateTime.Now;
if (transaction == null) throw new PiggyBankDataException("Transaction object is missing");
Transaction transactionToUpdate = await FindTransaction(transaction.Id);
if (!transactionToUpdate.IsValid) throw new PiggyBankDataNotFoundException("Transaction [" + transaction.Id + "] cannot be found");
if (transactionToUpdate.IsClosed) throw new PiggyBankDataException("Closed Transaction cannot be created / updated");
if (transaction.TimeStamp != transactionToUpdate.TimeStamp) throw new PiggyBankDataConcurrencyException("Transaction [" + transaction.Id + "] is being updated by other process");
transaction.Book = transactionToUpdate.Book;
AccountManager acc = new AccountManager(_dbContext);
transaction.DebitAccount = await acc.FindAccount(transaction.DebitAccount.Id);
transaction.CreditAccount = await acc.FindAccount(transaction.CreditAccount.Id);
ValidateTransaction(transaction);
transaction.TimeStamp = timeStamp;
PiggyBankUtility.CheckMandatory(transaction);
PiggyBankUtility.UpdateModel(transactionToUpdate, transaction);
try
{
await _dbContext.SaveChangesAsync();
}
catch (DbUpdateConcurrencyException) { throw new PiggyBankDataConcurrencyException("Transaction [" + transaction.Id + "] is being updated by other process"); }
return transactionToUpdate;
}