edit readme

README.md

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+Паттерн "Фабричный Метод" определяет интерфейс создания объекта, но позволяет субклассам выбрать создаваемый экземпляр.
+
+Все фабричные паттерны обеспечивают слабую связанность за счет сокращения зависимости приложения от конкретных классов.
+Фабричный Метод основан на наследовании: создание объектов делегируется субклассам, реализующим фабричный метод для создания объектов. Задача Фабричного Метода - перемещение создания экземпляров в субклассы.
+
+*Принцип:*
+- По возможности использовать абстракции в коде.

lesson_4/ChicagoPizzaStore.hpp

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+/*
+ * ChicagoPizzaStore.hpp
+ *
+ *  Created on: 2 нояб. 2021 г.
+ *      Author: alexander
+ */
+
+#pragma once
+
+#include "PizzaStore.hpp"
+#include "ChicagoStylePizza.hpp"
+#include "ChicagoStyleCheesePizza.hpp"
+#include "ChicagoStyleVeggiePizza.hpp"
+#include "ChicagoStyleClamPizza.hpp"
+#include "ChicagoStylePepperoniPizza.hpp"
+
+class ChicagoPizzaStore: public PizzaStore
+{
+public:
+    Pizza createPizza(const std::string &type) const override
+    {
+        if (type == "cheese")
+        {
+            return ChicagoStyleCheesePizza();
+        }
+        else if (type == "veggie")
+        {
+            return ChicagoStyleVeggiePizza();
+        }
+        else if (type == "clam")
+        {
+            return ChicagoStyleClamPizza();
+        }
+        else if (type == "pepperoni")
+        {
+            return ChicagoStylePepperoniPizza();
+        }
+        else
+        {
+            return ChicagoStylePizza();
+        }
+    }
+};

lesson_4/ChicagoStyleCheesePizza.hpp

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+/*
+ * ChicagoStyleCheesePizza.hpp
+ *
+ *  Created on: 2 нояб. 2021 г.
+ *      Author: alexander
+ */
+
+#pragma once
+
+#include "Pizza.hpp"
+
+class ChicagoStyleCheesePizza: public Pizza
+{
+public:
+    ChicagoStyleCheesePizza()
+    {
+        setName("Chicago Style Deep Dish Cheese Pizza");
+        setDough("Extra Thick Crust Dough");
+        setSauce("Plum Tomato Sauce");
+
+        addTopping("Shredded Mozzarella Cheese");
+    }
+
+    void cut() const override
+    {
+        std::cout << "Cutting the pizza into square slices" << std::endl;
+    }
+};

lesson_4/ChicagoStyleClamPizza.hpp

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+/*
+ * ChicagoStyleClamPizza.hpp
+ *
+ *  Created on: 2 нояб. 2021 г.
+ *      Author: alexander
+ */
+
+#pragma once
+
+#include "Pizza.hpp"
+
+class ChicagoStyleClamPizza: public Pizza
+{
+public:
+    ChicagoStyleClamPizza()
+    {
+        setName("Chicago Style Clam Pizza");
+        setDough("Extra Thick Crust Dough");
+        setSauce("Plum Tomato Sauce");
+
+        addTopping("Shredded Mozzarella Cheese");
+        addTopping("Frozen Clams from Chesapeake Bay");
+    }
+
+    void cut() const override
+    {
+        std::cout << "Cutting the pizza into square slices" << std::endl;
+    }
+};

lesson_4/ChicagoStylePepperoniPizza.hpp

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+/*
+ * ChicagoStylePepperoniPizza.hpp
+ *
+ *  Created on: 2 нояб. 2021 г.
+ *      Author: alexander
+ */
+
+#pragma once
+
+#include "Pizza.hpp"
+
+class ChicagoStylePepperoniPizza: public Pizza
+{
+public:
+    ChicagoStylePepperoniPizza()
+    {
+        setName("Chicago Style Pepperoni Pizza");
+        setDough("Extra Thick Crust Dough");
+        setSauce("Plum Tomato Sauce");
+
+        addTopping("Shredded Mozzarella Cheese");
+        addTopping("Black Olives");
+        addTopping("Spinach");
+        addTopping("Eggplant");
+        addTopping("Sliced Pepperoni");
+    }
+
+    void cut() const override
+    {
+        std::cout << "Cutting the pizza into square slices" << std::endl;
+    }
+};

lesson_4/ChicagoStylePizza.hpp

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+/*
+ * ChicagoStylePizza.hpp
+ *
+ *  Created on: 2 нояб. 2021 г.
+ *      Author: alexander
+ */
+
+#pragma once
+
+#include "Pizza.hpp"
+
+class ChicagoStylePizza: public Pizza
+{
+};

lesson_4/ChicagoStyleVeggiePizza.hpp

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+/*
+ * ChicagoStyleVeggiePizza.hpp
+ *
+ *  Created on: 2 нояб. 2021 г.
+ *      Author: alexander
+ */
+
+#pragma once
+
+#include "Pizza.hpp"
+
+class ChicagoStyleVeggiePizza: public Pizza
+{
+public:
+    ChicagoStyleVeggiePizza()
+    {
+        setName("Chicago Deep Dish Veggie Pizza");
+        setDough("Extra Thick Crust Dough");
+        setSauce("Plum Tomato Sauce");
+
+        addTopping("Shredded Mozzarella Cheese");
+        addTopping("Black Olives");
+        addTopping("Spinach");
+        addTopping("Eggplant");
+    }
+
+    void cut() const override
+    {
+        std::cout << "Cutting the pizza into square slices" << std::endl;
+    }
+};

lesson_4/NYPizzaStore.hpp

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+/*
+ * NYPizzaStore.hpp
+ *
+ *  Created on: 2 нояб. 2021 г.
+ *      Author: alexander
+ */
+
+#pragma once
+
+#include "PizzaStore.hpp"
+#include "NYStylePiza.hpp"
+#include "NYStyleCheesePiza.hpp"
+#include "NYStyleVeggiePizza.hpp"
+#include "NYStyleClamPizza.hpp"
+#include "NYStylePepperoniPizza.hpp"
+
+class NYPizzaStore: public PizzaStore
+{
+public:
+    Pizza createPizza(const std::string &type) const override
+    {
+        if (type == "cheese")
+        {
+            return NYStyleCheesePiza();
+        }
+        else if (type == "veggie")
+        {
+            return NYStyleVeggiePizza();
+        }
+        else if (type == "clam")
+        {
+            return NYStyleClamPizza();
+        }
+        else if (type == "pepperoni")
+        {
+            return NYStylePepperoniPizza();
+        }
+        else
+        {
+            return NYStylePiza();
+        }
+    }
+};

lesson_4/NYStyleCheesePiza.hpp

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+/*
+ * NYStyleCheesePiza.hpp
+ *
+ *  Created on: 2 нояб. 2021 г.
+ *      Author: alexander
+ */
+
+#pragma once
+
+#include "Pizza.hpp"
+
+class NYStyleCheesePiza: public Pizza
+{
+public:
+    NYStyleCheesePiza()
+    {
+        setName("NY Style Sauce and Cheese Pizza");
+        setDough("Thin Crust Dough");
+        setSauce("Marinara Sauce");
+
+        addTopping("Grated Reggiano Cheese");
+    }
+};

lesson_4/NYStyleClamPizza.hpp

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+/*
+ * NYStyleClamPizza.hpp
+ *
+ *  Created on: 2 нояб. 2021 г.
+ *      Author: alexander
+ */
+
+#pragma once
+
+#include "Pizza.hpp"
+
+class NYStyleClamPizza: public Pizza
+{
+public:
+    NYStyleClamPizza()
+    {
+        setName("NY Style Clam Pizza");
+        setDough("Thin Crust Dough");
+        setSauce("Marinara Sauce");
+
+        addTopping("Grated Reggiano Cheese");
+        addTopping("Fresh Clams from Long Island Sound");
+    }
+};

lesson_4/NYStylePepperoniPizza.hpp

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+/*
+ * NYStylePepperoniPizza.hpp
+ *
+ *  Created on: 2 нояб. 2021 г.
+ *      Author: alexander
+ */
+
+#pragma once
+
+#include "Pizza.hpp"
+
+class NYStylePepperoniPizza: public Pizza
+{
+public:
+    NYStylePepperoniPizza()
+    {
+        setName("NY Style Pepperoni Pizza");
+        setDough("Thin Crust Dough");
+        setSauce("Marinara Sauce");
+
+        addTopping("Grated Reggiano Cheese");
+        addTopping("Sliced Pepperoni");
+        addTopping("Garlic");
+        addTopping("Onion");
+        addTopping("Mushrooms");
+        addTopping("Red Pepper");
+    }
+};

lesson_4/NYStylePiza.hpp

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+/*
+ * NYStylePiza.hpp
+ *
+ *  Created on: 2 нояб. 2021 г.
+ *      Author: alexander
+ */
+
+#pragma once
+
+#include "Pizza.hpp"
+
+class NYStylePiza: public Pizza
+{
+};

lesson_4/NYStyleVeggiePizza.hpp

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+/*
+ * NYStyleVeggiePizza.hpp
+ *
+ *  Created on: 2 нояб. 2021 г.
+ *      Author: alexander
+ */
+
+#pragma once
+
+#include "Pizza.hpp"
+
+class NYStyleVeggiePizza: public Pizza
+{
+public:
+    NYStyleVeggiePizza()
+    {
+        setName("NY Style Veggie Pizza");
+        setDough("Thin Crust Dough");
+        setSauce("Marinara Sauce");
+
+        addTopping("Grated Reggiano Cheese");
+        addTopping("Garlic");
+        addTopping("Onion");
+        addTopping("Mushrooms");
+        addTopping("Red Pepper");
+    }
+};

lesson_4/Pizza.hpp

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+/*
+ * Pizza.hpp
+ *
+ *  Created on: 2 нояб. 2021 г.
+ *      Author: alexander
+ */
+
+#pragma once
+
+#include <iostream>
+#include <list>
+
+class Pizza
+{
+private:
+    std::string name;
+    std::string dough;
+    std::string sauce;
+    std::list<std::string> toppings;
+public:
+
+    virtual void prepare() const
+    {
+        std::cout << "Preparing " << name << std::endl;
+        std::cout << "Tossing dough..." << std::endl;
+        std::cout << "Adding sauce..." << std::endl;
+        std::cout << "Adding toppings:" << std::endl;
+        for (const std::string &topping : toppings)
+        {
+            std::cout << '\t' << topping << std::endl;
+        }
+    }
+
+    virtual void bake() const
+    {
+        std::cout << "Bake for 25 minutes at 350" << std::endl;
+    }
+
+    virtual void cut() const
+    {
+        std::cout << "Cutting the pizza into diagonal slices" << std::endl;
+    }
+
+    virtual void box() const
+    {
+        std::cout << "Place pizza in official PizzaStore box" << std::endl;
+    }
+
+    virtual std::string getName() const
+    {
+        return name;
+    }
+
+    virtual void setName(std::string name)
+    {
+        this->name = name;
+    }
+
+    virtual void setDough(std::string dough)
+    {
+        this->dough = dough;
+    }
+
+    virtual void setSauce(std::string sauce)
+    {
+        this->sauce = sauce;
+    }
+
+    virtual void addTopping(std::string topping)
+    {
+        toppings.push_back(topping);
+    }
+
+    virtual ~Pizza() {}
+};

lesson_4/PizzaStore.hpp

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+/*
+ * PizzaStore.hpp
+ *
+ *  Created on: 2 нояб. 2021 г.
+ *      Author: alexander
+ */
+
+#pragma once
+
+#include "Pizza.hpp"
+
+class PizzaStore
+{
+public:
+    virtual Pizza orderPizza(const std::string &type) const
+    {
+        Pizza pizza = createPizza(type);
+
+        pizza.prepare();
+        pizza.bake();
+        pizza.cut();
+        pizza.box();
+
+        return pizza;
+    }
+
+    virtual Pizza createPizza(const std::string &type) const = 0;
+
+    virtual ~PizzaStore() {}
+};

lesson_4/main.cpp

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+/*
+ * main.cpp
+ *
+ *  Created on: 2 нояб. 2021 г.
+ *      Author: alexander
+ */
+
+#include <vector>
+#include "NYPizzaStore.hpp"
+#include "ChicagoPizzaStore.hpp"
+
+int main()
+{
+    std::vector<std::string> pizzaTypes {"cheese", "clam", "pepperoni", "veggie"};
+
+    PizzaStore *nyStore = new NYPizzaStore();
+    PizzaStore *chicagoStore = new ChicagoPizzaStore();
+    Pizza pizza;
+
+    for (const std::string &pizzaType : pizzaTypes)
+    {
+        pizza = nyStore->orderPizza(pizzaType);
+        std::cout << "Ethan ordered a " << pizza.getName() << std::endl;
+
+        pizza = chicagoStore->orderPizza(pizzaType);
+        std::cout << "Joel ordered a " << pizza.getName() << std::endl;
+    }
+
+    delete nyStore;
+    delete chicagoStore;
+
+    return 0;
+}