public Task <InquiryViewModel> Handle(InquiryByAccountNumberQuery request, CancellationToken cancellationToken)
{
var account = _accountRepository.GetAccountByAccountNumber(request.AccountNumber);
if (account == null)
{
throw new InquiryFailException($"Account Number - {request.AccountNumber} could not be found.");
}
var currentBalance = _accountRepository.GetCurrentBalanceByAccountId(account);
_bankingSystemDbContext.Transactions.Add(new AccountTransaction()
{
AccountId = account.Id,
Amount = currentBalance,
Action = ActionCode.Inquiry,
TransactionDatetime = _machineDateTime.Now
});
if (_bankingSystemDbContext.SaveChanges() <= 0)
{
throw new InquiryFailException($"Inquiry fail with account number - {request.AccountNumber}.");
}
return(Task.FromResult(new InquiryViewModel()
{
AccountNumber = account.AccountNumber,
Currency = account.Currency,
Balance = currentBalance
}));
}
public async Task <Unit> Handle(WithdrawCommand request, CancellationToken cancellationToken)
{
var account = _accountRepository.GetAccountByAccountNumber(request.AccountNumber);
if (account == null)
{
throw new WithdrawFailException($"No Account was found by account numbe - {request.AccountNumber}");
}
decimal rates = 1;
if (request.Currency != account.Currency)
{
rates = await _currencyService.GetRates(account.Currency, request.Currency);
if (rates <= 0)
{
throw new WithdrawFailException($"Invalid Currency {request.Currency}.");
}
}
var currentBalance = _accountRepository.GetCurrentBalanceByAccountId(account);
var actualAmout = (request.Amount * rates);
if (actualAmout <= 0)
{
throw new WithdrawFailException($"Invalid actual amount after exchanged ({actualAmout}).");
}
if (actualAmout > currentBalance)
{
throw new WithdrawFailException("The current balance not enough to withdraw.");
}
_bankingSystemDbContext.Transactions.Add(new AccountTransaction()
{
AccountId = account.Id,
Amount = actualAmout,
Action = ActionCode.Withdraw,
TransactionDatetime = _machineDateTime.Now
});
account.LastActivityDate = _machineDateTime.Now;
if (_bankingSystemDbContext.SaveChanges() <= 0)
{
throw new WithdrawFailException($"Withdraw fail with account number - {request.AccountNumber}.");
}
return(Unit.Value);
}
public async Task <Unit> Handle(DepositCommand request, CancellationToken cancellationToken)
{
var account = _accountRepository.GetAccountByAccountNumber(request.AccountNumber);
if (account == null)
{
throw new DepositFailException("Account Number - {request.AccountNumber} could not be found.");
}
decimal rates = 1;
if (request.Currency != account.Currency)
{
rates = await _currencyService.GetRates(account.Currency, request.Currency);
if (rates <= 0)
{
throw new DepositFailException($"Invalid Currency {request.Currency}");
}
}
var actualAmout = (request.Amount * rates);
if (actualAmout <= 0)
{
throw new DepositFailException($"Invalid actual amount {actualAmout}");
}
_bankingSystemDbContext.Transactions.Add(new AccountTransaction()
{
AccountId = account.Id,
Amount = actualAmout,
Action = ActionCode.Deposit,
TransactionDatetime = _machineDateTime.Now
});
account.LastActivityDate = _machineDateTime.Now;
if (_bankingSystemDbContext.SaveChanges() <= 0)
{
throw new WithdrawFailException($"Withdraw fail with account number - {request.AccountNumber}.");
}
return(Unit.Value);
}
public static BankingSystemDbContext Create()
{
var options = new DbContextOptionsBuilder <BankingSystemDbContext>()
.UseInMemoryDatabase(Guid.NewGuid().ToString())
.Options;
var context = new BankingSystemDbContext(options);
context.Database.EnsureCreated();
int a1 = 1,
a2 = 2,
a3 = 3;
context.BankAccounts.AddRange(new[] {
new BankAccount()
{
Id = a1, AccountNumber = "1", IsActive = true, Currency = "THB"
},
new BankAccount()
{
Id = a2, AccountNumber = "2", IsActive = true, Currency = "THB"
},
new BankAccount()
{
Id = a3, AccountNumber = "3", IsActive = true, Currency = "THB"
}
});
context.Transactions.AddRange(
new AccountTransaction()
{
AccountId = a1, Id = 10001, Action = ActionCode.Deposit, Amount = 100, Note = "This is the initial deposit.", TransactionDatetime = new DateTime(2018, 12, 5, 22, 30, 0, 0)
},
new AccountTransaction()
{
AccountId = a2, Id = 10002, Action = ActionCode.Deposit, Amount = 200, Note = "This is the initial deposit.", TransactionDatetime = new DateTime(2018, 12, 5, 22, 30, 0, 0)
},
new AccountTransaction()
{
AccountId = a3, Id = 10003, Action = ActionCode.Deposit, Amount = 300, Note = "This is the initial deposit.", TransactionDatetime = new DateTime(2018, 12, 5, 22, 30, 0, 0)
}
);
context.Statements.AddRange(
new AccountStatement()
{
AccountId = a1, ClosingBalance = 0, Id = 1, StatementDetails = "This statement on Dec, 2018"
},
new AccountStatement()
{
AccountId = a2, ClosingBalance = 0, Id = 2, StatementDetails = "This statement on Dec, 2018"
},
new AccountStatement()
{
AccountId = a3, ClosingBalance = 0, Id = 3, StatementDetails = "This statement on Dec, 2018"
}
);
context.SaveChanges();
return(context);
}