StateAccessAdapter.h

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#pragma once
#include "common/Export.h"
 
 
#include "common/StateAccess.h"
#include "statepatch/StatePatch.h"
 
namespace eve::statepatch {
 
class EVENGINE_API_FOUNDATION StatePatchStateAdapter final : public eve::IStateQuery, public eve::IStateMutation {
public:
    explicit StatePatchStateAdapter(Store& store) noexcept : store_(store) {}
 
    [[nodiscard]] std::optional<eve::Value> value(std::string_view subject, std::string_view key) const override;
    [[nodiscard]] std::optional<bool> hasTag(std::string_view subject, std::string_view tag) const override;
    [[nodiscard]] std::optional<eve::Value> attribute(std::string_view, std::string_view) const override {
        return std::nullopt;
    }
    [[nodiscard]] std::optional<eve::Value> resource(std::string_view, std::string_view) const override {
        return std::nullopt;
    }
    [[nodiscard]] std::optional<eve::Value> state(std::string_view subject, std::string_view key) const override;
    [[nodiscard]] std::optional<bool> authority(std::string_view, std::string_view) const override {
        return std::nullopt;
    }
 
    [[nodiscard]] eve::Result<eve::MutationReceipt> apply(std::span<const eve::StateMutation> mutations,
                                                          const eve::MutationContext&         context) override;
 
private:
    Store& store_;
};
 
}  // namespace eve::statepatch