Merge pull request #6 from urboob21/dev_branch

Add bridge pattern

Author: urbytes21

.gitignore

@@ -1,3 +1,4 @@
 *build
 *private*
-*.vscode
+*.vscode
+*Identifier

CMakeLists.txt

@@ -90,6 +90,7 @@ set(APP_SOURCES
     "src/core/datatypes/class/CConstructors.cpp"
     "src/core/datatypes/class/CDestructors.cpp"
     "src/patterns/structural/Adapter.cpp"
+    "src/patterns/structural/Bridge.cpp"
 )
 
 # Test files

docs/uml/patterns_structural_bridge.drawio.svg

@@ -0,0 +1,207 @@
+#include <iostream>
+
+namespace Problem
+{
+    class Widget
+    {
+    public:
+        virtual ~Widget() = default;
+        virtual std::string clickOn() const = 0;
+    };
+
+    /* Concrete variations for Button */
+    class Button : public Widget
+    {
+    public:
+        virtual ~Button() = default;
+
+    public:
+        std::string clickOn() const override
+        {
+            return "Click on: Button\n";
+        }
+    };
+
+    class ButtonWindows : public Button
+    {
+    public:
+        std::string clickOn() const override
+        {
+            return "[Linux]" + Button::clickOn();
+        }
+    };
+
+    class ButtonLinux : public Button
+    {
+    public:
+        std::string clickOn() const override
+        {
+            return "[Windows]" + Button::clickOn();
+        }
+    };
+
+    /* Concrete variations for Label */
+    class Label : public Widget
+    {
+    public:
+        virtual ~Label() = default;
+
+    public:
+        std::string clickOn() const override
+        {
+            return "Click on: Label\n";
+        }
+    };
+
+    class LabelWindows : public Label
+    {
+    public:
+        std::string clickOn() const override
+        {
+            return "[Windows]" + Label::clickOn();
+        }
+    };
+
+    class LabelLinux : public Label
+    {
+    public:
+        std::string clickOn() const override
+        {
+            return "[Linux]" + Label::clickOn();
+        }
+    };
+
+    /* Concrete variations for others widgets like Text,CCombo  or new platform macOS etc*/
+    // [Problem 1] We have to write the Text/TextLinux ...
+
+    namespace Client
+    {
+        void clientCode(const Widget *widget)
+        {
+            if (widget != nullptr)
+                std::cout << widget->clickOn();
+        }
+    }
+
+    void run()
+    {
+        // [Problem 2] : Use the Bridge if you need to be able to switch implementations at runtime. how to exmaple for this
+        // still don't know
+        Widget *button = new ButtonWindows();
+        Client::clientCode(button);
+        delete button;
+    }
+}
+
+namespace BridgePattern
+{
+    /**
+     * The Implementation defines the interface for all implementation classes. It
+     * doesn't have to match the Abstraction's interface. In fact, the two
+     * interfaces can be entirely different. Typically the Implementation interface
+     * provides only primitive Widgets, while the Abstraction defines higher-
+     * level Widgets based on those primitives.
+     */
+    class OsImplemetation
+    {
+    public:
+        virtual std::string clickOnImplement() const = 0;
+        virtual ~OsImplemetation() = default;
+    };
+
+    class WindowsImplemetation : public OsImplemetation
+    {
+    public:
+        std::string clickOnImplement() const override
+        {
+            return "[Windows]";
+        }
+    };
+
+    class LinuxImplemetation : public OsImplemetation
+    {
+    public:
+        std::string clickOnImplement() const override
+        {
+            return "[Linux]";
+        }
+    };
+
+    /**
+     * The Abstraction defines the interface for the "control" part of the two class
+     * hierarchies. It maintains a reference to an object of the Implementation
+     * hierarchy and delegates all of the real work to this object.
+     */
+    class WidgetAbstraction
+    {
+    protected:
+        OsImplemetation *_implementation;
+
+    public:
+        explicit WidgetAbstraction(OsImplemetation *implemetation) : _implementation{implemetation}
+        {
+        }
+        virtual ~WidgetAbstraction() = default;
+
+        virtual std::string clickOn() const = 0;
+    };
+
+    /**
+     * We can extend the Abstraction without changing the Implementation classes.
+     */
+    class ButtonAbstraction : public WidgetAbstraction
+    {
+    public:
+        explicit ButtonAbstraction(OsImplemetation *implemetation) : WidgetAbstraction{implemetation} {}
+        std::string clickOn() const override
+        {
+            return this->_implementation->clickOnImplement() + "Click on: Button\n";
+        }
+    };
+
+    class LabelAbstraction : public WidgetAbstraction
+    {
+    public:
+        explicit LabelAbstraction(OsImplemetation *implemetation) : WidgetAbstraction{implemetation} {}
+        std::string clickOn() const override
+        {
+            return this->_implementation->clickOnImplement() + "Click on: Label\n";
+        }
+    };
+
+    namespace Client
+    {
+        void clientCode(const WidgetAbstraction *widget)
+        {
+            if (widget != nullptr)
+                std::cout << widget->clickOn();
+        }
+    }
+
+    void run()
+    {
+        // TODO: check memory leak here
+        OsImplemetation *os = new WindowsImplemetation();
+        WidgetAbstraction *widget = new ButtonAbstraction(os);
+        Client::clientCode(widget);
+
+        os = new LinuxImplemetation();
+        widget = new LabelAbstraction(os);
+        Client::clientCode(widget);
+
+        delete os;
+        delete widget;
+    }
+}
+
+struct BridgeAutoruner
+{
+    BridgeAutoruner()
+    {
+        std::cout << "\n--- Bridge Pattern Example ---\n";
+        Problem::run();
+        BridgePattern::run();
+    }
+};
+
+static BridgeAutoruner instance;