// Summary:
// Get the list of currencies supported by the data repository.
//
// Return:
// ShowExchangeRateDto
// An instance to ShowExchangeRateDto
public async Task <ListCurrencyDto> GetAllAvailableCurrencies()
{
ShowExchangeRateDto showExchangeRateDto = await GetAllConversionRatesByCurrency("EUR");
Array currencyList = showExchangeRateDto.Rates.Keys.ToArray();
return(new ListCurrencyDto {
Currencies = (string[])currencyList
});
}
// Summary:
// Get conversion rates for historic days.
//
// Parameters:
// DateTime:
// History datetime
// Return:
// ShowExchangeRateDto
// An instance to ShowExchangeRateDto
public async Task <ShowExchangeRateDto> GetHistoricRateByDate(DateTime dateval)
{
HistoricExchangeRates historicExchangeRates = await _currencyRepository.GetConversionRatesByDate(dateval);
ShowExchangeRateDto showExchangeRateDto = new ShowExchangeRateDto()
{
Base = historicExchangeRates.Base,
Timestamp = historicExchangeRates.Timestamp,
Date = historicExchangeRates.Date,
Rates = historicExchangeRates.Rates
};
return(showExchangeRateDto);
}
public async Task <ActionResult <ShowExchangeRateDto> > GetRatesByCurrency(string currencyCode)
{
try
{
ShowExchangeRateDto showExchangeRateDto = await this._currencyService.GetAllConversionRatesByCurrency(currencyCode);
if (showExchangeRateDto.Base is null)
{
// need to log
return(NotFound());
}
return(Ok(showExchangeRateDto));
}
catch (Exception)
{
// need to log
return(NotFound());
}
}
public async Task <ActionResult <ShowExchangeRateDto> > GetHistoricRateByDate(int days)
{
try
{
DateTime currentDate = DateTime.Now;
ShowExchangeRateDto showExchangeRateDto = await _currencyService.GetHistoricRateByDate(currentDate.AddDays(-days));
if (showExchangeRateDto.Base is null)
{
// need to log
return(NotFound());
}
return(Ok(showExchangeRateDto));
}
catch (Exception)
{
// need to log
return(NotFound());
}
}
// Summary:
// It internally converts the base currency to the targer currency since API only supports EUR
//
// Parameters:
// latestExchangeRates:
// An instance to LatestExchangeRates
// string:
// Currency code.
// Return:
// showExchangeRateDto
// An instance to ShowExchangeRateDto
private ShowExchangeRateDto ConvertAsBaseCurrency(LatestExchangeRates latestExchangeRates, string currencyCode)
{
ShowExchangeRateDto convertedRates = new ShowExchangeRateDto()
{
Base = currencyCode,
Timestamp = latestExchangeRates.Timestamp,
Date = latestExchangeRates.Date,
Rates = new Dictionary <string, float>()
};
if (latestExchangeRates.Base == currencyCode)
{
convertedRates.Rates = latestExchangeRates.Rates;
return(convertedRates);
}
foreach (KeyValuePair <string, float> entry in latestExchangeRates.Rates.ToList())
{
ShowConversionDto showConversionDto = new ShowConversionDto(currencyCode, entry.Key, 0);
convertedRates.Rates.Add(entry.Key, CalculateExchangeRateValue(showConversionDto, latestExchangeRates));
}
return(convertedRates);
}
