/**
* Scales a Recipe's Ingredients, Serving Size, and Nutritional Information to match the scaled
* factor.
*
* @param recipe Recipe to scale.
* @param scaleFactor The factor to scale it by.
* @return A new Recipe object with scaled fields.
*/
public static Recipe scaleRecipe(Recipe recipe, double scaleFactor) {
// rebuild and scale ingredients
ArrayList<RecipeIngredient> newIngredientsList = new ArrayList<RecipeIngredient>();
for (RecipeIngredient ingredient : recipe.getIngredients()) {
if (ingredient.getAmount() == null) newIngredientsList.add(ingredient);
else newIngredientsList.add(ingredient.scale(scaleFactor));
}
// build the new Recipe and return
return new Recipe(
recipe.getName(),
recipe.getInstructions(),
recipe.getServingSize().scale(scaleFactor),
recipe.getServings(),
recipe.getRating(),
newIngredientsList,
recipe.getNutritionInformation().scale(scaleFactor));
}
