StateAccessAdapter.h

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#pragma once
 
#include "attributes/AttributeSet.h"
#include "common/StateAccess.h"
 
namespace eve::attributes {
 
class AttributeSetStateAdapter final : public eve::IStateQuery, public eve::IStateMutation {
public:
    explicit AttributeSetStateAdapter(AttributeSet& attributes) noexcept : attributes_(attributes) {}
 
    [[nodiscard]] std::optional<eve::Value> value(std::string_view subject, std::string_view key) const override;
    [[nodiscard]] std::optional<bool> hasTag(std::string_view, std::string_view) const override { return std::nullopt; }
    [[nodiscard]] std::optional<eve::Value> attribute(std::string_view subject, std::string_view key) const override;
    [[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:
    bool          owns(std::string_view subject) const noexcept;
    AttributeSet& attributes_;
};
 
}  // namespace eve::attributes