Simple factory pattern

class Pizza {
  bake() {}
  prepare() {}
  box() {}
  cut() {}
}

class CheesePizza extends Pizza {}

class PepperoniPizza extends Pizza {}

class ClamPizza extends Pizza {}

class VeggiePizza extends Pizza {}

class SimplePizzaFactory {
  createPizza(type: string): Pizza {
    let pizza: Pizza = null;

    if (type === "cheese") {
      pizza = new CheesePizza();
    } else if (type === "pepperoni") {
      pizza = new PepperoniPizza();
    } else if (type === "clam") {
      pizza = new ClamPizza();
    } else if (type === "veggie") {
      pizza = new VeggiePizza();
    }

    return pizza;
  }
}

class PizzaStore {
  factory: SimplePizzaFactory;

  constructor(factory: SimplePizzaFactory) {
    this.factory = factory;
  }

  orderPizza(type: string): Pizza {
    const pizza: Pizza = this.factory.createPizza(type);

    pizza.prepare();
    pizza.bake();
    pizza.cut();
    pizza.box();

    return pizza;
  }
}