public async Task <IActionResult> ConvertWalletCurrency([FromBody] WalletConversionDTO walletConversion)
{
if (walletConversion == null ||
!walletConversion.UserId.HasValue ||
walletConversion.Amount <= 0)
{
return(BadRequest("Invalid model."));
}
var result = await _walletSrv.ConvertWalletCurrencyAsync(walletConversion);
if (result.IsSuccess)
{
return(Ok(result));
}
return(BadRequest(result));
}
public async Task <OperationResult <UserWalletsDTO> > ConvertWalletCurrencyAsync
(WalletConversionDTO walletConversion)
{
if (!walletConversion.UserId.HasValue)
{
throw new ArgumentNullException(nameof(walletConversion.UserId), "User ID must not be null.");
}
var user = _userService.Get(walletConversion.UserId.Value);
if (user == null)
{
user = await _userService.CreateUserAsync();
return(OperationResultBuilder <UserWalletsDTO> .BuildError(null,
"New user does not have actual wallets."));
}
if (!await _currencySrv.IsExists(walletConversion.BaseCurrency) ||
!await _currencySrv.IsExists(walletConversion.TargetCurrency))
{
return(OperationResultBuilder <UserWalletsDTO> .BuildError(null,
"Currency does not exist or is not supported."));
}
var baseWallet = _walletRepo.Data
.FirstOrDefault(w =>
w.UserFK.Equals(user.Id) &&
string.Equals(w.CurrencyISOCode, walletConversion.BaseCurrency,
StringComparison.InvariantCultureIgnoreCase));
if (baseWallet == null)
{
return(OperationResultBuilder <UserWalletsDTO> .BuildError(null, "Base wallet does not exist."));
}
var targetWallet = _walletRepo.Data
.FirstOrDefault(w =>
w.UserFK.Equals(user.Id) &&
string.Equals(w.CurrencyISOCode, walletConversion.TargetCurrency,
StringComparison.InvariantCultureIgnoreCase));
if (targetWallet == null)
{
targetWallet = new Wallet()
{
UserFK = user.Id,
CurrencyISOCode = walletConversion.TargetCurrency
};
await _walletRepo.AddAsync(targetWallet);
}
var conversionRate = await _currencySrv.GetConversionRate
(walletConversion.BaseCurrency, walletConversion.TargetCurrency);
var targetCurrencyAmount = walletConversion.Amount * conversionRate;
baseWallet.Amount -= walletConversion.Amount;
targetWallet.Amount += targetCurrencyAmount;
await _walletRepo.UpdateAsync(new[] { baseWallet, targetWallet });
return(await GetUserWalletsAsync(user.Id));
}