//TODO; Verify the math in case of food stage with refuse
public NutritionalLabel CreateNutritionalLabel(decimal amount)
{
NutritionalLabel label = new NutritionalLabel {
Amount = amount
};
NutritionalFact calories = NutritionalFacts.FirstOrDefault(n => n.FactDefinition.Tag != null && n.FactDefinition.Tag.Equals("ENERC_KCAL"));
label.Calories = calories?.Value ?? 0;
NutritionalFact fat = NutritionalFacts.FirstOrDefault(n => n.FactDefinition.Tag.Equals("FAT"));
decimal fatValue = fat?.Value ?? 0;
label.CaloriesFromFat = FatCalorieFactor > 0 ? fatValue * FatCalorieFactor : fatValue * 9;
NutritionalFact protein = NutritionalFacts.FirstOrDefault(n => n.FactDefinition.Tag != null && n.FactDefinition.Tag.Equals("PROCNT"));
decimal proteinValue = protein?.Value ?? 0;
label.CaloriesFromProtein = ProteinCalorieFactor > 0 ? ProteinCalorieFactor * proteinValue : proteinValue * 4;
NutritionalFact carb = NutritionalFacts.FirstOrDefault(n => n.FactDefinition.Tag != null && n.FactDefinition.Tag.Equals("CHOCDF"));
decimal carbValue = carb?.Value ?? 0;
label.CaloriesFromCarb = CarbCalorieFactor > 0 ? carbValue * CarbCalorieFactor : carbValue * 4;
label = FixPercentages(label);
label = PopulateNutrient(label, false);
return(label);
}
private NutritionalLabel PopulateNutrient(NutritionalLabel label, bool complexity)
{
label.Nutrients = new List <Nutrient>();
IEnumerable <NutritionalFact> nutrientValues = complexity
? NutritionalFacts.Where(n => n.FactDefinition.Tag != "ENERC_KCAL")
: NutritionalFacts.Where(n => n.FactDefinition.Tag != "ENERC_KCAL" && n.FactDefinition.IsPrincipal);
nutrientValues = nutrientValues.OrderBy(n => n.FactDefinition.Order);
foreach (Nutrient nutrient in from nutrientValue in nutrientValues where Math.Round(nutrientValue.Value, nutrientValue.FactDefinition.DecimalRoundNumber) > 0
select new Nutrient
{
Value = Math.Round(nutrientValue.Value, nutrientValue.FactDefinition.DecimalRoundNumber),
IsTitle = nutrientValue.FactDefinition.IsTitle,
Name = nutrientValue.FactDefinition.Name,
Order = nutrientValue.FactDefinition.Order,
Type = nutrientValue.FactDefinition.Type,
Unit = nutrientValue.FactDefinition.Unit,
ShowPercentage = nutrientValue.FactDefinition.DailyValue > 0,
Percentage =
nutrientValue.FactDefinition.DailyValue > 0
? Math.Round((nutrientValue.Value / nutrientValue.FactDefinition.DailyValue) * 100, 2)
: 0
})
{
label.Nutrients.Add(nutrient);
}
return(label);
}
private static NutritionalLabel FixPercentages(NutritionalLabel label)
{
label.FatPercentage = label.CaloriesFromFat > 0 ? Math.Round(((label.CaloriesFromFat / label.Calories) * 100), 0) : 0;
label.ProteinPercentage = label.CaloriesFromProtein > 0 ? Math.Round(((label.CaloriesFromProtein / label.Calories) * 100), 0) : 0;
label.CarbPercentage = label.CaloriesFromCarb > 0 ? Math.Round(((label.CaloriesFromCarb / label.Calories) * 100), 0) : 0;
decimal residualPercentage = 100 - (label.FatPercentage + label.ProteinPercentage + label.CarbPercentage);
if (residualPercentage == 0 || residualPercentage == 100)
{
return(label);
}
if (label.FatPercentage >= label.ProteinPercentage && label.FatPercentage >= label.CarbPercentage)
{
label.FatPercentage += residualPercentage;
}
else if (label.CarbPercentage >= label.FatPercentage && label.CarbPercentage >= label.ProteinPercentage)
{
label.CarbPercentage += residualPercentage;
}
else if (label.ProteinPercentage > label.FatPercentage && label.ProteinPercentage > label.CarbPercentage)
{
label.ProteinPercentage += residualPercentage;
}
return(label);
}