subject.hpp

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#ifndef SUBJECT_HPP
#define SUBJECT_HPP
 
#include "observer.hpp"
#include <vector>
#include <algorithm>
#include <string>
 
namespace observer {
 
class Subject {
public:
    void addObserver(IObserver* observer) {
        observers.push_back(observer);
    }
 
    void removeObserver(IObserver* observer) {
        observers.erase(
            std::remove(observers.begin(), observers.end(), observer),
            observers.end()
        );
    }
 
    void notify(const std::string &message) {
        for (auto* observer : observers) {
            if (observer) {
                observer->onNotify(message);
            }
        }
    }
 
private:
    std::vector<IObserver*> observers; 
};
 
} // namespace observer
 
#endif // SUBJECT_HPP