public async Task <IActionResult> MarketData(string assetPair)
{
var data = await _database.HashGetAllAsync(RedisService.GetMarketDataKey(assetPair));
var marketSlice = data?.ToMarketSlice() ?? new MarketSlice {
AssetPairId = assetPair
};
var nowDate = DateTime.UtcNow;
var now = nowDate.ToUnixTime();
var from = (nowDate - _marketDataInterval).ToUnixTime();
var baseVolumesDataTask = _database.SortedSetRangeByScoreAsync(RedisService.GetMarketDataBaseVolumeKey(assetPair), from, now);
var quoteVolumesDataTask = _database.SortedSetRangeByScoreAsync(RedisService.GetMarketDataQuoteVolumeKey(assetPair), from, now);
var pricesTask = _database.SortedSetRangeByScoreAsync(RedisService.GetMarketDataPriceKey(assetPair), from, now);
await Task.WhenAll(baseVolumesDataTask, quoteVolumesDataTask, pricesTask);
var prices = pricesTask.Result
.Where(x => x.HasValue)
.Select(x => RedisExtensions.DeserializeWithDate <decimal>(x)).ToList();
var baseVolumes = baseVolumesDataTask.Result
.Where(x => x.HasValue)
.Select(x => RedisExtensions.DeserializeWithDate <decimal>(x)).ToList();
decimal baseVolume = baseVolumes.Sum(x => x.data);
var quoteVolumes = quoteVolumesDataTask.Result
.Where(x => x.HasValue)
.Select(x => RedisExtensions.DeserializeWithDate <decimal>(x)).ToList();
decimal quoteVolume = quoteVolumes.Sum(x => x.data);
var pricesList = prices.Select(x => x.data).ToList();
decimal high = pricesList.Any() ? pricesList.Max() : 0;
decimal low = pricesList.Any() ? pricesList.Min() : 0;
if (pricesList.Any())
{
decimal price = pricesList[0];
if (price > 0)
{
decimal priceChange = (decimal.Parse(marketSlice.LastPrice, CultureInfo.InvariantCulture) - price) / price;
marketSlice.PriceChange = priceChange.ToString(CultureInfo.InvariantCulture);
}
}
if (high > 0)
{
marketSlice.High = high.ToString(CultureInfo.InvariantCulture);
}
if (low > 0)
{
marketSlice.Low = low.ToString(CultureInfo.InvariantCulture);
}
marketSlice.VolumeBase = baseVolume.ToString(CultureInfo.InvariantCulture);
marketSlice.VolumeQuote = quoteVolume.ToString(CultureInfo.InvariantCulture);
var model = new MarketDataViewModel
{
From = nowDate - _marketDataInterval,
To = nowDate,
Slice = marketSlice,
BaseVolumes = baseVolumes,
QuoteVolumes = quoteVolumes,
PriceValues = prices
};
return(View(model));
}
