resource.h

#pragma once
 
#include <cstdint>
#include <memory>
#include <string>
 
#include <nlohmann/json_fwd.hpp>
 
namespace Vkm::Engine {

class Resource {
    public:
        // Out of line: destroying and cloning the source needs the full json type.
        Resource();
        ~Resource();

        Resource(const Resource& other);
        // Deleted: it would drop the uid and version. Replace contents through the manager -
        // add() under a taken name, or swapValue.
        Resource& operator=(const Resource& other) = delete;
 
        Resource(Resource && other) noexcept;
        Resource& operator=(Resource && other) noexcept;
 
    public:
        const std::string& name() const noexcept { return m_name; }

        uint64_t uid() const noexcept { return m_uid; }

        uint64_t version() const noexcept { return m_version; }

        bool isHidden() const noexcept { return m_hidden; }
 
        bool hasSource() const noexcept { return m_source != nullptr; }

        nlohmann::json& sourceJson();

        const nlohmann::json& sourceJson() const;
 
    private:
        friend class ResourceManager;
 
    private:
        uint64_t    m_version = 1;
        uint64_t    m_uid     = 0;
        std::string m_name;
        bool        m_hidden  = false;

        std::unique_ptr<nlohmann::json> m_source;
};
 
} // namespace Vkm::Engine