public async Task <List <CryptoPrice> > GetPricesForDateRange(CryptoCurrency baseCurrency, DateTime startDate,
DateTime endDate,
CryptoCurrency quoteCurrency = CryptoCurrency.USD)
{
var cryptoPrices = _repository.GetCryptoPrices(baseCurrency.ToString(),
quoteCurrency.ToString(),
startDate,
endDate);
var lastDbPriceDate = cryptoPrices.Count > 1
? cryptoPrices.Max(x => x.Timestamp)
: startDate.AddDays(-1);
if (lastDbPriceDate < endDate)
{
var providerPrices = await _cryptoProxy.GetCryptoPrices(baseCurrency,
quoteCurrency,
lastDbPriceDate.AddDays(1),
endDate);
_repository.SavePrices(providerPrices);
cryptoPrices.AddRange(providerPrices);
}
return(cryptoPrices.OrderBy(x => x.Timestamp).ToList());
}
