private Commodity ParseCommodity(Db context, CommodityCategory category, JToken commodityJson)
{
var name = commodityJson.Value<string>("name");
var id = commodityJson.Value<int>("id");
var commodity = context.Commodities.FirstOrDefault(x => x.Id == id);
if (commodity == null)
{
commodity = new Commodity {Id = id};
context.Commodities.Add(commodity);
}
commodity.Name = name;
commodity.Category = category;
return commodity;
}
private CommodityAveragePrice ParserAveragePrice(Db context, Commodity commodity, DateTime time,
JToken commodityJson)
{
var averagePrice = commodityJson.Value<int?>("average_price");
if (averagePrice == null) return null;
var lastAverage = commodity.AveragePrices.OrderBy(x => x.Date).LastOrDefault();
if (lastAverage == null || (lastAverage.Date < time && lastAverage.Price != averagePrice))
{
var price = new CommodityAveragePrice {Commodity = commodity, Date = time, Price = averagePrice.Value};
context.CommodityAveragePrices.Add(price);
return price;
}
return lastAverage;
}
