HeadFirstDesignPatterns/Ch4PizzaStore/Pizza.cs

namespace Ch4PizzaStore;

public abstract class Pizza(string name) {
    public string Name { get; internal set; } = name;
    public IDough? Dough { get; internal set; } = null;
    public ISauce? Sauce { get; internal set; } = null;
    public IVeggies[]? VeggiesArray { get; internal set; } = null;
    public ICheese? Cheese { get; internal set; } = null;
    public IPepperoni? Pepperoni { get; internal set; } = null;
    public IClams? Clams { get; internal set; } = null;

    internal abstract void Prepare();

    // While in Java all methods are by default `virtual`, C# is the same as C++,
    // all methods are final/selaed until explicitly marked as virtual.
    internal virtual void Bake() {
        Console.WriteLine("Bake for 25 minutes at 350");
    }

    internal virtual void Cut() {
        Console.WriteLine("Cutting the pizza into diagonal slices");
    }

    internal virtual void Box() {
        Console.WriteLine("Place pizza in official PizzaStore box");
    }

    public override string ToString() {
        return "Pizza!"; // TODO: code to print the pizza here
    }
}

public class CheesePizza(IPizzaIngredientFactory ingredientFactory, string name) : Pizza(name) {
    internal override void Prepare() {
        Console.WriteLine($"Preparing {Name}");
        Dough = ingredientFactory.CreateDough();
        Sauce = ingredientFactory.CreateSauce();
        Cheese = ingredientFactory.CreateCheese();
    }
}

public class ClamPizza(IPizzaIngredientFactory ingredientFactory, string name) : Pizza(name) {
    internal override void Prepare() {
        Console.WriteLine($"Preparing {Name}");
        Dough = ingredientFactory.CreateDough();
        Sauce = ingredientFactory.CreateSauce();
        Cheese = ingredientFactory.CreateCheese();
        Clams = ingredientFactory.CreateClams();
    }
}

public abstract class PizzaStore {
    protected abstract Pizza CreatePizza(string type);

    public Pizza OrderPizza(string type) {
        var pizza = CreatePizza(type);
        pizza.Prepare();
        pizza.Bake();
        pizza.Cut();
        pizza.Box();
        return pizza;
    }
}

public class NYPizzaStore : PizzaStore {
    protected override Pizza CreatePizza(string type) {
        var ingredientFactory = new NYPizzaIngredientFactory();
        return type switch {
            "cheese" => new CheesePizza(ingredientFactory, "New York Style Cheese Pizza"),
            "clam" => new ClamPizza(ingredientFactory, "New York Style Clam Pizza"),
            _ => throw new ArgumentOutOfRangeException(nameof(type), type, null)
        };
    }
}

public interface IDough;

public interface ISauce;

public interface ICheese;

public interface IVeggies;

public interface IPepperoni;

public interface IClams;

public interface IPizzaIngredientFactory {
    public IDough CreateDough();
    public ISauce CreateSauce();
    public ICheese CreateCheese();
    public IVeggies[] CreateVeggies();
    public IPepperoni CreatePepperoni();
    public IClams CreateClams();
}

public class ThinCrustDough : IDough;

public class MarinaraSauce : ISauce;

public class ReggianoCheese : ICheese;

public class Garlic : IVeggies;

public class Onion : IVeggies;

public class Mushroom : IVeggies;

public class RedPepper : IVeggies;

public class SlicedPepperoni : IPepperoni;

public class FreshClams : IClams;

public class NYPizzaIngredientFactory : IPizzaIngredientFactory {
    public IDough CreateDough() {
        return new ThinCrustDough();
    }

    public ISauce CreateSauce() {
        return new MarinaraSauce();
    }

    public ICheese CreateCheese() {
        return new ReggianoCheese();
    }

    public IVeggies[] CreateVeggies() {
        return [new Garlic(), new Onion(), new Mushroom(), new RedPepper()];
    }

    public IPepperoni CreatePepperoni() {
        return new SlicedPepperoni();
    }

    public IClams CreateClams() {
        return new FreshClams();
    }
}