Design Patterns - Observer

//
//  main.cpp
//  observer
//
//  Created by Andrei Gavrila on 28/11/2021.
//  Copyright © 2021 Andrei Gavrila. All rights reserved.
//

#include <iostream>
#include <vector>
#include <algorithm>

class IToggleObserver
{
public:
    virtual void onToggle(std::string objectName) = 0;
};

class MyToggleObserver1: public IToggleObserver
{
public:
    virtual void onToggle(std::string objectName)
    {
        std::cout << "I am the " << static_cast<void*>(this) << " observer of type MyToggleObserver1 and I was told that a toggle was performed on " << objectName << ". I will do something about this!" << std::endl;
    }
};

class MyToggleObserver2: public IToggleObserver
{
public:
    virtual void onToggle(std::string objectName)
    {
        std::cout << "I am the " << static_cast<void*>(this) << " observer of type MyToggleObserver2 and I was told that a toggle was performed on " << objectName << ". I will simply ignore it as I don't want to do anything!" << std::endl;
    }
};

class ObservableSwitch
{
private:
    std::string objectName;

    std::vector<IToggleObserver *> toggleObservers;

    void notifyObservers()
    {
        std::for_each(toggleObservers.begin(), toggleObservers.end(), [&](IToggleObserver *observer) {
            observer->onToggle(objectName);
        });
    }
public:
    ObservableSwitch(std::string objectName): objectName(objectName) {}

    void addObserver(IToggleObserver *observer)
    {
        toggleObservers.push_back(observer);
    }

    void toggle()
    {
        std::cout << "Switch toggled, do something and notifying observers!" << std::endl;

        notifyObservers();
    }
};

int main(int argc, const char * argv[])
{
    ObservableSwitch observableSwitch("Bedroom Light Switch");

    IToggleObserver *to = new MyToggleObserver1();

    observableSwitch.addObserver(new MyToggleObserver1());
    observableSwitch.addObserver(new MyToggleObserver2());
    observableSwitch.addObserver(to);
    observableSwitch.addObserver(to);

    observableSwitch.toggle();

    return 0;
}

/*

Output:

Switch toggled, do something and notifying observers!
I am the 0x10100d580 observer of type MyToggleObserver1 and I was told that a toggle was performed on Bedroom Light Switch. I will do something about this!
I am the 0x101002e30 observer of type MyToggleObserver2 and I was told that a toggle was performed on Bedroom Light Switch. I will simply ignore it as I don't want to do anything!
I am the 0x10100d160 observer of type MyToggleObserver1 and I was told that a toggle was performed on Bedroom Light Switch. I will do something about this!
I am the 0x10100d160 observer of type MyToggleObserver1 and I was told that a toggle was performed on Bedroom Light Switch. I will do something about this!

*/