private decimal?GetQuantity(DateTime date, int selectedId, string UserId)
{
Day day = _foodItemServices.GetDay(date, UserId);
List <Product> products = _productServices.GetProducts(UserId, day).ToList();
var nutrientResults = new List <decimal?>();
// Make a big list of all the fooditems in the day.
List <FoodItem> foodItems = new List <FoodItem>();
foodItems.AddRange(day.Food);
// Now group the fooditems to get rid of repeats.
var groupedFoodItems = foodItems.
GroupBy(f => f.Code).
Select(fg => new { Code = fg.Key, Total = fg.Sum(f => f.Quantity) }).ToList();
foreach (var g in groupedFoodItems)
{
if (Macronutrients.Nutrient(selectedId).Name.ToLower() == "alcohol")
{
nutrientResults.Add(GetTotalAlcoholUnits(g.Total, products.Where(p => p.Code == g.Code).First()));
}
else
{
nutrientResults.Add(GetTotalMacroNutrient(g.Total, products.Where(p => p.Code == g.Code).First(), Macronutrients.Nutrient(selectedId).Name));
}
}
return(nutrientResults.Sum());
}
