private async Task <List <TradeSummaryData> > GetOrCacheBaseSummary(string baseCurrency)
{
var cacheResult = await CacheService.GetOrSetHybridAsync(CacheKey.ExchangeSummary(baseCurrency), TimeSpan.FromMinutes(5), async() =>
{
var tradeHistory = await GetOrCacheTradeHistory().ConfigureAwait(false);
var tradePairs = await TradePairReader.GetTradePairs().ConfigureAwait(false);
var basepairs = tradePairs.Where(x => x.BaseSymbol == baseCurrency).ToList();
var ids = basepairs.Select(x => x.TradePairId);
var tradeHistoryData = tradeHistory.Where(tp => ids.Contains(tp.TradePairId)).ToList();
var results = new List <TradeSummaryData>();
foreach (var x in basepairs)
{
var data = tradeHistoryData.Where(t => t.TradePairId == x.TradePairId);
results.Add(new TradeSummaryData
{
CurrencyId = x.CurrencyId,
TradePairId = x.TradePairId,
Name = x.Name,
Symbol = x.Symbol,
Change = GetChangePercent(data.FirstOrDefault()?.Rate ?? x.LastTrade, x.LastTrade).ToString("F2"),
BaseVolume = data.Sum(t => t.Amount *t.Rate).ToString("F8"),
Volume = data.Sum(t => t.Amount).ToString("F8"),
Low = (data.OrderBy(t => t.Rate).FirstOrDefault()?.Rate ?? x.LastTrade).ToString("F8"),
High = (data.OrderByDescending(t => t.Rate).FirstOrDefault()?.Rate ?? x.LastTrade).ToString("F8"),
Last = x.LastTrade.ToString("F8"),
BaseSymbol = x.BaseSymbol
});
}
return(results.ToList());
}).ConfigureAwait(false);
return(cacheResult);
}
public async Task <ExchangeSummary> GetExchangeSummary()
{
var cacheResult = await CacheService.GetOrSetHybridAsync(CacheKey.ExchangeSummary(), TimeSpan.FromSeconds(20), async() =>
{
var tradeHistoryData = await GetOrCacheTradeHistory().ConfigureAwait(false);
var tradePairs = await TradePairReader.GetTradePairs().ConfigureAwait(false);
var currencies = await CurrencyReader.GetCurrencies().ConfigureAwait(false);
var baseCurrencies = await CurrencyReader.GetBaseCurrencies().ConfigureAwait(false);
var summaryData = new List <ExchangeSummaryModel>();
foreach (var x in tradePairs)
{
var data = tradeHistoryData.Where(t => t.TradePairId == x.TradePairId);
summaryData.Add(new ExchangeSummaryModel
{
TradePairId = x.TradePairId,
Symbol = x.Symbol,
BaseSymbol = x.BaseSymbol,
TotalTrades = data.Count(),
Low = (data.OrderBy(t => t.Rate).FirstOrDefault()?.Rate ?? x.LastTrade),
High = (data.OrderByDescending(t => t.Rate).FirstOrDefault()?.Rate ?? x.LastTrade),
Volume = data.Sum(t => t.Amount),
TotalBase = data.Sum(t => t.Amount *t.Rate),
Change = GetChangePercent(data.FirstOrDefault()?.Rate ?? x.LastTrade, x.LastTrade)
});
}
var now = DateTime.UtcNow;
var baseData = summaryData.GroupBy(x => x.BaseSymbol);
var totalVolume = baseData.Select(x => new { Symbol = x.Key, Total = x.Sum(u => u.TotalBase) }).ToList();
var topMarket = baseData.Select(x => x.MaxBy(u => u.TotalBase)).OrderBy(x => x.BaseSymbol).ToList();
var featured = currencies.Any(x => x.FeaturedExpires > now)
? currencies.Where(x => x.FeaturedExpires > now).ToList()
: currencies.Where(x => x.CurrencyId == Constant.DOTCOIN_ID).ToList();
var baseCurrencyData = new List <ExchangeSummaryBaseCurrency>();
foreach (var currency in baseCurrencies)
{
var totalVol = totalVolume.FirstOrDefault(x => x.Symbol == currency.Symbol);
baseCurrencyData.Add(new ExchangeSummaryBaseCurrency
{
CurrencyId = currency.CurrencyId,
Name = currency.Name,
Symbol = currency.Symbol,
TotalVolume = totalVol != null
? totalVol.Total
: 0,
Rank = currency.Rank
});
}
return(new ExchangeSummary
{
TopMarkets = topMarket,
BaseCurrencies = baseCurrencyData,
TotalMarkets = tradePairs.Count,
TotalTrades = summaryData.Sum(x => x.TotalTrades),
Featured = featured.Select(x => new FeaturedCurrency
{
Name = x.Name,
Symbol = x.Symbol,
Website = x.Website,
Summary = x.Summary
}).ToList()
});
}).ConfigureAwait(false);
return(cacheResult);
}