translation_manager.h

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#ifndef TRANSLATION_MANAGER_H
#define TRANSLATION_MANAGER_H
 
#include <QJsonObject>
#include <QMutex>
#include <QObject>

class TranslationManager final : public QObject {
    Q_OBJECT
 
public:
    bool Initialize(const QString &language_code);

    static TranslationManager *GetInstance();

    QString Translate(const QString &key, const QString &default_value = QString()) const;

    QString GetCurrentLanguage() const;
 
private:
    explicit TranslationManager(QObject *parent = nullptr) : QObject(parent) {
    }

    TranslationManager(const TranslationManager &) = delete;

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

    bool LoadTranslations(const QString &language_code);

    static TranslationManager *instance_;
    static QMutex mutex_;
    QJsonObject translations_;
    QString current_language_code_;
    bool initialized_ = false;
};
 
#endif // TRANSLATION_MANAGER_H