database.h

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#ifndef DATABASE_H
#define DATABASE_H
 
#include <algorithm>
#include <functional>
 
#include <QFile>
#include <QDataStream>
#include <QVector>
#include <QString>
 
#include "../objects/profession.h"
#include "../objects/user.h"
 
typedef std::function<bool(User)> UserPredicat;  //< Тип функции-предиката для фильтров и удаления
 
class Database {
private:
    static Database *mInstance;
    static const QString mFilename;
 
    Database() = default;
 
    QVector<Profession> mProfessions;
    QVector<User> mUsers;
 
    QVector<User*> findUserByPredicat(UserPredicat predicat);
 
public:
    static Database* instance();
    QVector<Profession> professions() const;
    QVector<User> users() const;
 
    bool addUser(User usr);
    User* getUser(UID uid);
    User* getUser(QString login);
    QVector<User*> getUsersByType(UserType type);
    QVector<User*> getUsersByProfession(PID pid);
    bool removeUser(UID uid);
 
    bool addProfession(Profession prof);
    Profession* getProfession(PID pid);
    bool removeProfession(PID pid);
 
    void save();
    void load();
};
 
#endif // DATABASE_H