private static void SetMostRecentOfferOfType(OfferDto mostRecentOffer, PostingDto mostRecentPosting,
MarketMetricsDto marketMetricsDto, Expression <Func <MarketMetricsDto, int?> > quantityFunc, Expression <Func <MarketMetricsDto, decimal?> > priceFunc)
{
var quantityExpression = (MemberExpression)quantityFunc.Body;
var quantityProperty = (PropertyInfo)quantityExpression.Member;
var priceExpression = (MemberExpression)priceFunc.Body;
var priceProperty = (PropertyInfo)priceExpression.Member;
if (mostRecentOffer == null && mostRecentPosting == null)
{
quantityProperty.SetValue(marketMetricsDto, null);
priceProperty.SetValue(marketMetricsDto, null);
}
else
{
var mostRecentOfferDate = mostRecentOffer?.OfferDate;
var mostRecentPostingDate = mostRecentPosting?.PostingDate;
if (mostRecentPostingDate != null && mostRecentPostingDate > mostRecentOfferDate)
{
quantityProperty.SetValue(marketMetricsDto, mostRecentPosting.Quantity);
priceProperty.SetValue(marketMetricsDto, mostRecentPosting.Price);
}
else
{
quantityProperty.SetValue(marketMetricsDto, mostRecentOffer?.Quantity);
priceProperty.SetValue(marketMetricsDto, mostRecentOffer?.Price);
}
}
}
public ActionResult <MarketMetricsDto> Get()
{
var marketMetricsDto = new MarketMetricsDto();
var mostRecentOfferToBuy = Offer.GetMostRecentOfferOfType(_dbContext, PostingTypeEnum.OfferToBuy);
var mostRecentOfferToSell = Offer.GetMostRecentOfferOfType(_dbContext, PostingTypeEnum.OfferToSell);
var mostRecentPostingToBuy = Posting.GetMostRecentOfferOfType(_dbContext, PostingTypeEnum.OfferToBuy);
var mostRecentPostingToSell = Posting.GetMostRecentOfferOfType(_dbContext, PostingTypeEnum.OfferToSell);
SetMostRecentOfferOfType(mostRecentOfferToBuy, mostRecentPostingToBuy, marketMetricsDto, x => x.MostRecentOfferToBuyQuantity, x => x.MostRecentOfferToBuyPrice);
SetMostRecentOfferOfType(mostRecentOfferToSell, mostRecentPostingToSell, marketMetricsDto, x => x.MostRecentOfferToSellQuantity, x => x.MostRecentOfferToSellPrice);
var postings = Posting.List(_dbContext).ToList();
marketMetricsDto.TotalBuyVolume = postings.Where(x => x.PostingType.PostingTypeID == (int)PostingTypeEnum.OfferToBuy).Sum(x => x.Quantity);
marketMetricsDto.TotalSellVolume = postings.Where(x => x.PostingType.PostingTypeID == (int)PostingTypeEnum.OfferToSell).Sum(x => x.Quantity);
var waterTransfer = WaterTransfer.GetMostRecentRegistered(_dbContext);
marketMetricsDto.MostRecentWaterTransfer = waterTransfer;
return(Ok(marketMetricsDto));
}
