public MealDto GetRandomMeal(MealGoalsDto goals, int alimentCount)
{
MealDto meal;
var aliments = _alimentService.GetAll();
do
{
meal = GenerateMealWithRandomAliments(alimentCount, aliments);
meal = ComputeBestQuantities(meal, goals);
} while (!MatchGoals(meal));
return(meal);
}
private MealDto ComputeBestQuantities(MealDto meal, MealGoalsDto goals)
{
var calories = meal.MealParts.Select(p => p.Aliment.Calories).ToList();
var protides = meal.MealParts.Select(p => p.Aliment.Protides).ToList();
var lipides = meal.MealParts.Select(p => p.Aliment.Lipides).ToList();
var glucides = meal.MealParts.Select(p => p.Aliment.Glucides).ToList();
var combos = GetAllPossibleCombos(meal.MealParts.Count);
double minRes = double.MaxValue;
List <double> bestValue = null;
foreach (var combo in combos)
{
double ct = 0;
double pt = 0;
double lt = 0;
double gt = 0;
for (int i = 0; i < combo.Count; i++)
{
ct += combo[i] * calories[i];
pt += combo[i] * protides[i];
lt += combo[i] * lipides[i];
gt += combo[i] * glucides[i];
}
var result = 100 * Math.Abs(ct - goals.Calories) / goals.Calories +
100 * Math.Abs(pt - goals.Protides) / goals.Protides +
100 * Math.Abs(lt - goals.Lipides) / goals.Lipides +
100 * Math.Abs(gt - goals.Glucides) / goals.Glucides;
if (result < minRes)
{
minRes = result;
bestValue = combo;
}
}
for (int i = 0; i < meal.MealParts.Count; i++)
{
meal.MealParts[i].Quantity = bestValue[i];
}
meal.Accuracy = Math.Max(0, 100 - minRes);
return(meal);
}
public Task <MealDto> GetRandomMealAsync(MealGoalsDto goals, int alimentCount)
{
return(Task.Factory.StartNew(() =>
{
MealDto meal;
var aliments = _alimentService.GetAll();
do
{
meal = GenerateMealWithRandomAliments(alimentCount, aliments);
meal = ComputeBestQuantities(meal, goals);
} while (!MatchGoals(meal));
return meal;
}));
}
