jsonfile.hpp

#pragma once

#include <QtCore>

#include "file.hpp"
#include "world.hpp"

namespace Headway
{
    /*! \brief Reads and writes Headway::World objects from/to json files.
     */

    class JsonFile : public File
    {
    public:

        /*! \brief Reads data from json file.
         *
         * \param filePath Location of json file.
         * \throw FileException if file cannot be loaded.
         */

        explicit JsonFile(const QString& filePath);

        quint32 readWidth() const override { return width; }
        quint32 readHeight() const override { return height; }
        quint64 readGenerations() const override { return generations; }

        void readCoordinate(quint32& x, quint32& y) override;
        bool hasNext() const noexcept override;
        void rewind() noexcept override;

        /*! \brief Writes data to json file.
         *
         * \param filePath Location of json file.
         * \param biotope World object to save.
         *
         * \throw FileException if file cannot be saved.
         */

        static void write(const QString& filePath, const Headway::World& biotope);

    private:
        quint32 width;
        quint32 height;
        quint64 generations = 0;

        QJsonDocument document;
        QJsonArray cells;
        QJsonArray::iterator iterator;
    };
}