public async Task <Result> RefundMoney(int accountId, ChargedMoneyData paymentData, UserInfo user)
{
return(await GetAccount(accountId)
.Ensure(IsReasonProvided, "Payment reason cannot be empty")
.Ensure(a => AreCurrenciesMatch(a, paymentData), "Account and payment currency mismatch")
.BindWithLock(_locker, a => Result.Success(a)
.BindWithTransaction(_context, account => Result.Success(account)
.Map(Refund)
.Map(WriteAuditLog))));
bool IsReasonProvided(AgencyAccount account) => !string.IsNullOrEmpty(paymentData.Reason);
async Task <AgencyAccount> Refund(AgencyAccount account)
{
account.Balance += paymentData.Amount;
_context.Update(account);
await _context.SaveChangesAsync();
return(account);
}
Task <AgencyAccount> WriteAuditLog(AgencyAccount account) =>
WriteAuditLogWithReferenceCode(account, paymentData, AccountEventType.Refund, user);
}
public async Task <Result> ChargeMoney(int accountId, ChargedMoneyData paymentData, ApiCaller apiCaller)
{
return(await GetAccount(accountId)
.Ensure(IsReasonProvided, "Payment reason cannot be empty")
.Ensure(a => AreCurrenciesMatch(a, paymentData), "Account and payment currency mismatch")
.BindWithLock(_locker, a => Result.Success(a)
.Ensure(IsBalanceSufficient, "Could not charge money, insufficient balance")
.BindWithTransaction(_context, account => Result.Success(account)
.Map(ChargeMoney)
.Map(WriteAuditLog))));
bool IsReasonProvided(AgencyAccount account) => !string.IsNullOrEmpty(paymentData.Reason);
bool IsBalanceSufficient(AgencyAccount account) => this.IsBalanceSufficient(account, paymentData.Amount);
async Task <AgencyAccount> ChargeMoney(AgencyAccount account)
{
account.Balance -= paymentData.Amount;
_context.Update(account);
await _context.SaveChangesAsync();
_context.Detach(account);
return(account);
}
async Task <AgencyAccount> WriteAuditLog(AgencyAccount account)
{
var eventData = new AccountBalanceLogEventData(paymentData.Reason, account.Balance);
await _auditService.Write(AccountEventType.Charge,
account.Id,
paymentData.Amount,
apiCaller,
eventData,
paymentData.ReferenceCode);
return(account);
}
}
private async Task <AgencyAccount> WriteAuditLogWithReferenceCode(AgencyAccount account, ChargedMoneyData paymentData, AccountEventType eventType,
UserInfo user)
{
var eventData = new AccountBalanceLogEventData(paymentData.Reason, account.Balance);
await _auditService.Write(eventType,
account.Id,
paymentData.Amount,
user,
eventData,
paymentData.ReferenceCode);
return(account);
}
private bool AreCurrenciesMatch(AgencyAccount account, ChargedMoneyData paymentData) => account.Currency == paymentData.Currency;
