CODESAMPLE

Facade - C++

Facade C++

The Facade pattern provides a simplified interface to a complex subsystem. It encapsulates multiple interactions within the subsystem into a single, higher-level interface, making it easier for clients to use. This example demonstrates a media player facade, hiding the complexities of audio and video components. The MediaFacade class provides methods like playMovie and playMusic, internally coordinating the AudioPlayer and VideoPlayer to achieve the desired functionality. This approach aligns with C++’s object-oriented principles, promoting encapsulation and reducing coupling between the client code and the subsystem.

#include <iostream>
#include <string>

// Subsystem classes
class AudioPlayer {
public:
    void play(const std::string& filename) {
        std::cout << "Playing audio: " << filename << std::endl;
    }
};

class VideoPlayer {
public:
    void play(const std::string& filename) {
        std::cout << "Playing video: " << filename << std::endl;
    }
};

class DVDPlayer {
public:
    void on() {
        std::cout << "DVD Player is ON" << std::endl;
    }
    void off() {
        std::cout << "DVD Player is OFF" << std::endl;
    }
    void playDVD(const std::string& dvdName) {
        std::cout << "Playing DVD: " << dvdName << std::endl;
    }
};

// Facade class
class MediaFacade {
private:
    AudioPlayer audioPlayer;
    VideoPlayer videoPlayer;
    DVDPlayer dvdPlayer;

public:
    void playMovie(const std::string& filename) {
        dvdPlayer.on();
        dvdPlayer.playDVD(filename);
        videoPlayer.play(filename);
        audioPlayer.play(filename);
        dvdPlayer.off();
    }

    void playMusic(const std::string& filename) {
        audioPlayer.play(filename);
    }
};

int main() {
    MediaFacade mediaFacade;

    mediaFacade.playMovie("The Matrix");
    std::cout << std::endl;
    mediaFacade.playMusic("Bohemian Rhapsody");

    return 0;
}