authentication_manager.h

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#ifndef AUTHENTICATION_MANAGER_H
#define AUTHENTICATION_MANAGER_H
 
#include <QDateTime>
#include <QMap>
#include <QObject>

class AuthenticationManager final : public QObject {
    Q_OBJECT
 
public:
    static AuthenticationManager *GetInstance() {
        static AuthenticationManager instance;
        return &instance;
    }

    static QString GenerateClientId();

    static QString GenerateSessionToken();

    void RegisterPassword(const QString &frequency, const QString &password);

    bool VerifyPassword(const QString &frequency, const QString &provided_password);

    void RemovePassword(const QString &frequency);

    static QString CreateAuthResponse(bool success, const QString &error_message = QString());

    bool StoreSession(const QString &frequency, const QString &client_id, const QString &session_token);

    bool ValidateSession(const QString &session_token, const QString &frequency);

    void DeactivateSession(const QString &session_token);

    void DeactivateClientSessions(const QString &client_id);

    void DeactivateFrequencySessions(const QString &frequency);

    void CleanupExpiredSessions();
 
private:
    struct SessionInfo {
        QString client_id; 
        QString frequency; 
        QDateTime timestamp; 
        bool is_active; 
    };

    explicit AuthenticationManager(QObject *parent = nullptr) : QObject(parent) {
    }

    ~AuthenticationManager() override = default;

    AuthenticationManager(const AuthenticationManager &) = delete;

    AuthenticationManager &operator=(const AuthenticationManager &) = delete;

    QMap<QString, QString> wavelength_passwords_{};

    QMap<QString, SessionInfo> sessions_{};
};
 
#endif // AUTHENTICATION_MANAGER_H