database.h

#pragma once
 
 
// Application headers
namespace ehm_dal::tables {
class AbstractTable;
enum class TableIndex : char;
} // namespace ehm_dal::tables
 
// Qt headers
class QByteArray;
class QDataStream;
#include <QtGlobal>
#include <memory>
class QString;
 
namespace ehm_dal {
class Database
{
public:
    Database();
 
    // Close database
    void clearAll();
 
    // File i/o
    bool read(const QString &file_path);
    bool read(QDataStream &in);
    bool read(QDataStream &in, const qsizetype file_size);
 
    // Get data
    static std::shared_ptr<ehm_dal::tables::AbstractTable> table(const ehm_dal::tables::TableIndex table_id);
    qint32 tableCount() const;
 
private:
    // Tables
    struct TableData;
    static TableData table_data_;
 
    // End of the file
    static QByteArray end_of_file_data_;
 
    // File i/o
    qsizetype remainingBytes(QDataStream &in,
                             const qsizetype file_start_pos,
                             const qsizetype file_size);
    bool readEndOfFile(QDataStream &in, const qsizetype bytes_to_read);
 
    // Initialisation
    void init();
    void initChildTables();
};
 
} // namespace ehm_dal