public ActionResult Convert(ConvertViewModel viewModel)
{
if (ModelState.IsValid)
{
using (CryptoWalletDBContext ctx = new CryptoWalletDBContext())
{
User CurrentUser = ctx.Users.AsNoTracking().FirstOrDefault(u => u.Email == User.Identity.Name);
UserBankAccount toAccount = ctx.UsersBankAccounts.FirstOrDefault(u => u.Currency == viewModel.IntoCurrency && u.UserId == CurrentUser.UserId);
UserBankAccount fromAccount = ctx.UsersBankAccounts.FirstOrDefault(u => u.Currency == viewModel.Currency && u.UserId == CurrentUser.UserId);
if (toAccount.Currency == fromAccount.Currency)
{
ModelState.AddModelError("", "Choose other currency!");
SetupConvertViewModel(viewModel);
return(View(viewModel));
}
if (fromAccount.Amount < viewModel.Amount)
{
ModelState.AddModelError("", "Insufficient funds!");
SetupConvertViewModel(viewModel);
return(View(viewModel));
}
ExchangeService cryptoExchange = new ExchangeService();
List <CurrencyRate> currencyRates = cryptoExchange.GetConversionRate(findCurrency(viewModel.Currency), new Currency[] { Currency.USD, Currency.GBP, Currency.BTC, Currency.XRP, Currency.EUR });
decimal rate = currencyRates.FirstOrDefault(u => u.Currency.ToString() == viewModel.IntoCurrency).Rate;
fromAccount.Amount -= viewModel.Amount;
toAccount.Amount += (viewModel.Amount * rate);
UserTransaction transaction = new UserTransaction
{
Amount = viewModel.Amount,
ToAccountId = toAccount.AccountId,
FromAccountId = fromAccount.AccountId,
TransactionDate = DateTime.Now,
TransactionRate = (decimal)rate,
ToAccount = toAccount,
FromAccount = fromAccount
};
ctx.UsersTransactions.Add(transaction);
ctx.SaveChanges();
return(RedirectToAction("Index"));
}
}
SetupConvertViewModel(viewModel);
return(View(viewModel));
}