public bool TryGetFromCache(string ticker, Exchange?exchange, DateTime?from, DateTime?to, PriceInterval interval, out PriceList prices)
{
prices = new PriceList();
try
{
string fileName = $"{ticker}";
if (exchange.HasValue)
{
fileName += $"_{exchange}";
}
if (from.HasValue)
{
fileName += $"_{from}";
}
if (to.HasValue)
{
fileName += $"_{to}";
}
fileName += $"_{interval.ToString()}.csv";
string file = Path.Combine(FOLDER, fileName);
if (File.Exists(file))
{
string[] lines = File.ReadAllLines(file);
for (int i = 1; i < lines.Length; i++)
{
HistoricalPrice p = HistoricalPrice.From(lines[i]);
prices.Add(p);
}
return(true);
}
else
{
return(false);
}
}
#pragma warning disable CA1031 // Do not catch general exception types
catch (Exception)
{
return(false);
}
#pragma warning restore CA1031 // Do not catch general exception types
}
public bool TryGetHistoricalPrices(string ticker, Exchange?exchange, DateTime?from, DateTime?to, PriceInterval priceInterval, out PriceList prices, out string errorMessage)
{
double fromValue;
if (from.HasValue)
{
fromValue = (from.Value - DATE_1970).TotalSeconds;
}
else
{
fromValue = (FIRST_DATE - DATE_1970).TotalSeconds;
}
double toValue;
if (to.HasValue)
{
toValue = (to.Value - DATE_1970).TotalSeconds;
}
else
{
toValue = (DateTime.Now - DATE_1970).TotalSeconds;
}
string content = YahooApiCaller.GetHistoricalPrices(ticker, fromValue, toValue, priceInterval);
string[] lines = content.Split('\n');
prices = new PriceList();
for (int i = 1; i < lines.Length; i++)
{
HistoricalPrice p = HistoricalPrice.From(lines[i]);
prices.Add(p);
}
errorMessage = "ok";
return(true);
}