zprp/Models/Meal.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

using Android.App;
using Android.Content;
using Android.OS;
using Android.Runtime;
using Android.Views;
using Android.Widget;

using Newtonsoft.Json;

namespace Eat.Models
{
    class Meal : Product
    {
        [JsonProperty]
        internal List<Tuple<Product, double>> Products { get; private set; } = new List<Tuple<Product, double>>();
        [JsonProperty]
        public int PrepTime
        {
            get;
            private set;
        }

        public Meal(string name, int prepTime)
        {
            Name = name;
            PrepTime = prepTime;
        }

        public Meal(string name, int prepTime, List<Tuple<Product, double>> products)
        {
            Name = name;
            PrepTime = prepTime;
            Products = products;
        }

        public void AddProduct(Product product)
        {
            Products.Add(new Tuple<Product, double>(product, 1.0f));
        }

        public void AddProduct(Product product, double ratio)
        {
            Products.Add(new Tuple<Product, double>(product, ratio));
        }

        public override void CalculateElements()
        {
            Cost = 0.0;
            Kcal = 0;
            Fat = Carbs = Protein = 0.0;

            foreach (var product in Products)
            {
                Cost += product.Item1.Cost;
                Kcal += Convert.ToInt32(product.Item1.Kcal * product.Item2);
                Fat += product.Item1.Fat * product.Item2;
                Carbs += product.Item1.Carbs * product.Item2;
                Protein += product.Item1.Protein * product.Item2;
            }
        }

        public string GetProducts()
        {
            string result = "";
            foreach (var product in Products)
            {
                result += product.Item1.Name + " ";
            }

            return result;
        }
    }
}