public async Task <Result <PurseDto> > ConvertCurrencies(ConvertCurrenciesParam param)
{
var availableCurrencies = await _currencyProvider.GetAvailableCurrencies();
if (!availableCurrencies.Contains(param.Currency) || !availableCurrencies.Contains(param.ToCurrency))
{
return(new Result <PurseDto>().SetUnprocessable("Currency not supported"));
}
var ratio = await _currencyProvider.GetCurrenciesRatio();
var purse = await _purseRepository.GetOrCreatePurse(param.UserId.Value);
if (!purse.TryConvertCurrencies(param.Currency, param.ToCurrency, ratio[param.Currency], ratio[param.ToCurrency], param.Sum.Value))
{
return(new Result <PurseDto>().SetUnprocessable("Not Enough Money"));
}
await _purseRepository.Commit();
return(new Result <PurseDto>(purse.ToDto()));
}