public async Task <ApiMarketsResult> GetMarkets(string baseMarket, int hours)
{
hours = Math.Min(hours, 168);
var cacheResult = await CacheService.GetOrSetHybridAsync(CacheKey.ApiMarkets(baseMarket, hours), TimeSpan.FromSeconds(20), async() =>
{
var lastTime = DateTime.UtcNow.AddHours(-hours);
var tradePairs = await TradePairReader.GetTradePairs().ConfigureAwait(false);
if (!tradePairs.Any())
{
return new ApiMarketsResult {
Error = $"Markets not found", Success = true,
}
}
;
var markets = string.IsNullOrEmpty(baseMarket) ? tradePairs : tradePairs.Where(x => x.BaseSymbol == baseMarket).ToList();
using (var context = ExchangeDataContextFactory.CreateReadOnlyContext())
{
var allTrades = await context.Trade
.AsNoTracking()
.Where(x => (x.Status == Enums.TradeStatus.Partial || x.Status == Enums.TradeStatus.Pending))
.Select(x => new
{
TradePairId = x.TradePairId,
Type = x.Type,
Rate = x.Rate,
Amount = x.Amount
}).ToListNoLockAsync().ConfigureAwait(false);
var allTradeHistory = await context.TradeHistory
.AsNoTracking()
.Where(x => x.Timestamp > lastTime)
.Select(x => new
{
Id = x.Id,
TradePairId = x.TradePairId,
Rate = x.Rate,
Amount = x.Amount
})
.OrderBy(x => x.Id)
.ToListNoLockAsync().ConfigureAwait(false);
var results = new ConcurrentBag <ApiMarket>();
foreach (var tradePair in markets)
{
var trades = allTrades
.Where(x => x.TradePairId == tradePair.TradePairId)
.Select(x => new
{
Type = x.Type,
Rate = x.Rate,
Amount = x.Amount
}).ToList();
var tradeHistory = allTradeHistory
.Where(x => x.TradePairId == tradePair.TradePairId)
.Select(x => new
{
Id = x.Id,
Rate = x.Rate,
Amount = x.Amount
})
.OrderBy(x => x.Id)
.ToList();
var ask = 0m;
var bid = 0m;
var buyVolume = 0m;
var sellVolume = 0m;
var buyBaseVolume = 0m;
var sellBaseVolume = 0m;
if (trades.Any())
{
var sellOrders = trades.Where(x => x.Type == Enums.TradeHistoryType.Sell).OrderBy(x => x.Rate).ToList();
if (sellOrders.Any())
{
ask = sellOrders.First().Rate;
sellVolume = Math.Round(sellOrders.Sum(x => x.Amount), 8);
sellBaseVolume = Math.Round(sellOrders.Sum(x => x.Amount *x.Rate), 8);
}
var buyOrders = trades.Where(x => x.Type == Enums.TradeHistoryType.Buy).OrderByDescending(x => x.Rate).ToList();
if (buyOrders.Any())
{
bid = buyOrders.First().Rate;
buyVolume = Math.Round(buyOrders.Sum(x => x.Amount), 8);
buyBaseVolume = Math.Round(buyOrders.Sum(x => x.Amount *x.Rate), 8);
}
}
var change = 0m;
var volume = 0m;
var baseVolume = 0m;
var open = tradePair.LastTrade;
var close = tradePair.LastTrade;
var high = tradePair.LastTrade;
var low = tradePair.LastTrade;
var last = tradePair.LastTrade;
if (tradeHistory.Any())
{
var firstTrade = tradeHistory.FirstOrDefault();
var lastTrade = tradeHistory.LastOrDefault();
high = tradeHistory.Max(x => x.Rate);
low = tradeHistory.Min(x => x.Rate);
open = firstTrade.Rate;
close = lastTrade.Rate;
last = lastTrade.Rate;
change = open.GetPercentChanged(close);
volume = tradeHistory.Sum(x => x.Amount);
baseVolume = Math.Round(tradeHistory.Sum(x => x.Amount *x.Rate), 8);
}
results.Add(new ApiMarket
{
Label = tradePair.Market.Replace("_", "/"),
TradePairId = tradePair.TradePairId,
Change = open.GetPercentChanged(close),
AskPrice = ask,
BidPrice = bid,
BuyVolume = buyVolume,
SellVolume = sellVolume,
LastPrice = last,
High = high,
Low = low,
Volume = volume,
Open = open,
Close = close,
BaseVolume = baseVolume,
BuyBaseVolume = buyBaseVolume,
SellBaseVolume = sellBaseVolume
});
}
return(new ApiMarketsResult
{
Success = true,
Data = results.OrderBy(x => x.Label).ToList()
});
}
});
