private GroupDiet CreateRandomDailyDiet()
{
var diet = new GroupDiet();
for (var j = 0; j < _numberOfMealsPerDay; j++)
{
var meal = new GroupMeal {
MealType = (MealType)j
};
diet.Meals.Add(meal);
}
List <int> idsWithDeficiency;
while ((idsWithDeficiency = _personalData.Where(p => p.Requirements.CaloriesAllowedRange.Lower > _dietAnalyzer.SummarizeForPerson(diet, p.Id).NutritionValues.Calories).Select(pd => pd.Id).ToList()).Any())
{
var meal = diet.Meals.GetRandomItem();
var includedRecipes = diet.Meals.SelectMany(m => m.Recipes).Select(r => r.Recipe).Distinct().ToList();
var split = GetRanodmNotInvlolvedRecipe(includedRecipes, meal.MealType);
split.Adjustments.RemoveAll(a => !idsWithDeficiency.Contains(a.PersonId));
meal.Recipes.Add(split);
}
return(diet);
}
private static GroupMeal CopyMeal(GroupMeal sourceMeal)
{
return(new GroupMeal
{
MealType = sourceMeal.MealType,
Recipes = CopyRecipes(sourceMeal.Recipes)
});
}
private void PerformRecipesLevelMutation(GroupMeal meal, double mutationProbability)
{
if (_random.NextDouble() < mutationProbability)
{
//add new split
var split = new RecipeGroupSplit {
Recipe = _recipesForMealType[meal.MealType].GetRandomItem()
};
var adjustment = new RecipeAdjustment
{
AmountMultiplier = RecipeGroupSplit.Multipliers.GetRandomItem(),
PersonId = _random.Next(_groupSize)
};
var duplicate = meal.Recipes.FirstOrDefault(r => r.Recipe == split.Recipe);
if (duplicate == null)
{
meal.Recipes.Add(split);
}
else if (duplicate.Adjustments.All(a => a.PersonId != adjustment.PersonId))
{
duplicate.Adjustments.Add(adjustment);
}
}
foreach (var recipeGroupSplit in meal.Recipes)
{
if (_random.NextDouble() < mutationProbability)
{
//add adjustment to split
if (recipeGroupSplit.Adjustments.Count < _groupSize)
{
recipeGroupSplit.Adjustments.Add(GetRandomMissingAdjustment(recipeGroupSplit.Adjustments));
}
}
for (var adjIndex = recipeGroupSplit.Adjustments.Count - 1; adjIndex >= 0; adjIndex--)
{
if (!(_random.NextDouble() < mutationProbability))
{
continue;
}
if (_random.NextDouble() < 0.5)
{
//remove adjustment from split
recipeGroupSplit.Adjustments.RemoveAt(adjIndex);
}
else
{
//change multiplier
recipeGroupSplit.Adjustments[adjIndex].AmountMultiplier = RecipeGroupSplit.Multipliers.GetRandomItem();
}
}
}
meal.Recipes.RemoveAll(r => !r.Adjustments.Any());
}
private void RemoveRepeatingRecipes(GroupMeal meal)
{
for (var i = 0; i < meal.Recipes.Count; i++)
{
for (var j = meal.Recipes.Count - 1; j > i; j--)
{
if (meal.Recipes[i].Recipe == meal.Recipes[j].Recipe)
{
meal.Recipes.RemoveAt(j);
}
}
}
}
private Tuple <GroupMeal, GroupMeal> CrossOverMeal(GroupMeal parent1, GroupMeal parent2)
{
var crossOverPoint = _random.Next(1 + Math.Min(parent1.Recipes.Count, parent2.Recipes.Count));
var child1 = new GroupMeal {
MealType = parent1.MealType
};
var child2 = new GroupMeal {
MealType = parent1.MealType
};
child1.Recipes.AddRange(parent1.Recipes.Take(crossOverPoint));
child1.Recipes.AddRange(parent2.Recipes.Skip(crossOverPoint));
child2.Recipes.AddRange(parent2.Recipes.Take(crossOverPoint));
child2.Recipes.AddRange(parent1.Recipes.Skip(crossOverPoint));
RemoveRepeatingRecipes(child1);
RemoveRepeatingRecipes(child2);
return(new Tuple <GroupMeal, GroupMeal>(child1, child2));
}
private static MealData CreateMealData(GroupMeal meal)
{
return(new MealData {
Recipes = CreateRecipesData(meal.Recipes)
});
}