private async Task <List <MarketSummary> > GetExtendedMarketSummaries(string quoteCurrency)
{
var summaries = new List <MarketSummary>();
var symbolsCacheKey = this._exchange + "Markets";
var symbols = await Global.AppCache.GetAsync <IEnumerable <ExchangeMarket> >(symbolsCacheKey);
if (symbols == null || !symbols.Any())
{
symbols = await _api.GetMarketSymbolsMetadataAsync();
Global.AppCache.Add(symbolsCacheKey, symbols, new MemoryCacheEntryOptions
{
AbsoluteExpiration = DateTimeOffset.Now.AddHours(1),
});
}
if (symbols.Count() == 0)
{
throw new Exception();
}
var list = await _api.GetMarketSymbolsAsync();
var filteredList = list.Where(x => x.ToLower().EndsWith(quoteCurrency.ToLower(), StringComparison.Ordinal));
//var tasks = new Task[summaries.Count()];
//var cts = new CancellationTokenSource();
//var po = new ParallelOptions
//{
// CancellationToken = cts.Token,
// MaxDegreeOfParallelism = Environment.ProcessorCount
//};
//Parallel.ForEach(filteredList, po, (item, state, index) =>
//{
// tasks[(int)index] = Task.Run(() =>
// {
// var ticker = _api.GetTickerAsync(item).Result;
// if (ticker != null)
// {
// var symbol = symbols.FirstOrDefault(x => x.MarketName == item);
// if (symbol != null)
// {
// summaries.Add(new MarketSummary()
// {
// CurrencyPair = new CurrencyPair() { BaseCurrency = symbol.MarketCurrency, QuoteCurrency = symbol.BaseCurrency },
// MarketName = item,
// Ask = ticker.Ask,
// Bid = ticker.Bid,
// Last = ticker.Last,
// Volume = ticker.Volume.ConvertedVolume,
// });
// }
// }
// });
//});
//Task.WaitAll(tasks);
foreach (var item in filteredList)
{
var ticker = await _api.GetTickerAsync(item);
if (ticker != null)
{
var symbol = symbols.FirstOrDefault(x => x.MarketSymbol == item);
if (symbol != null)
{
summaries.Add(new MarketSummary()
{
CurrencyPair = new CurrencyPair()
{
BaseCurrency = symbol.QuoteCurrency, QuoteCurrency = symbol.BaseCurrency
},
MarketName = item,
Ask = ticker.Ask,
Bid = ticker.Bid,
Last = ticker.Last,
Volume = ticker.Volume.QuoteCurrencyVolume,
});
}
}
}
return(summaries);
}
