/// <summary>
/// Should return exchange rates among the specified currencies that are defined by the source. But only those defined
/// by the source, do not return calculated exchange rates. E.g. if the source contains "CZK/USD" but not "USD/CZK",
/// do not return exchange rate "USD/CZK" with value calculated as 1 / "CZK/USD". If the source does not provide
/// some of the currencies, ignore them.
/// </summary>
public IEnumerable <ExchangeRate> GetExchangeRates(IEnumerable <Currency> currencies)
{
if (currencies == null)
{
throw new ArgumentNullException(nameof(currencies));
}
if (currencies.Count() == 0)
{
return(Enumerable.Empty <ExchangeRate>());
}
using (Stream content = _client.GetDataAsync().Result)
using (var reader = new StreamReader(content))
{
IDictionary <string, decimal> rates = _rateExtractor.Extract(reader.ReadToEnd());
return(Compose(currencies, rates));
}
}
public async Task <IActionResult> GetRest()
{
var result = await _restClient.GetDataAsync(new DataRequest());
return(Ok(result));
}
