Feature.hpp

#pragma once
 
#include "data/AmendmentCenterInterface.hpp"
#include "data/BackendInterface.hpp"
#include "rpc/common/Specs.hpp"
#include "rpc/common/Types.hpp"
 
#include <boost/json/conversion.hpp>
#include <boost/json/value.hpp>
#include <xrpl/protocol/jss.h>
 
#include <cstdint>
#include <map>
#include <memory>
#include <optional>
#include <string>
 
namespace rpc {

class FeatureHandler {
    std::shared_ptr<BackendInterface> sharedPtrBackend_;
    std::shared_ptr<data::AmendmentCenterInterface const> amendmentCenter_;
 
public:
    struct Input {
        std::optional<std::string> ledgerHash;
        std::optional<uint32_t> ledgerIndex;
        std::optional<std::string> feature;
    };

    struct Output {
        struct Feature {
            std::string name;
            std::string key;
            bool supported = false;
            bool enabled = false;
        };
 
        std::map<std::string, Feature> features;
        std::string ledgerHash;
        uint32_t ledgerIndex{};
 
        // when set to true, output will be inlined in `result` instead of wrapping as `features`
        // inside of `result`.
        bool inlineResult = false;
 
        // validated should be sent via framework
        bool validated = true;
    };
 
    using Result = HandlerReturnType<Output>;

    FeatureHandler(
        std::shared_ptr<BackendInterface> sharedPtrBackend,
        std::shared_ptr<data::AmendmentCenterInterface const> const& amendmentCenter
    )
        : sharedPtrBackend_(std::move(sharedPtrBackend)), amendmentCenter_(amendmentCenter)
    {
    }

    static RpcSpecConstRef
    spec([[maybe_unused]] uint32_t apiVersion);

    [[nodiscard]] Result
    process(
        Input const& input,
        Context const& ctx
    ) const;  // NOLINT(readability-convert-member-functions-to-static)
 
private:
    friend void
    tag_invoke(boost::json::value_from_tag, boost::json::value& jv, Output const& output);

    friend void
    tag_invoke(boost::json::value_from_tag, boost::json::value& jv, Output::Feature const& feature);

    friend Input
    tag_invoke(boost::json::value_to_tag<Input>, boost::json::value const& jv);
};
 
}  // namespace rpc