JsonBool.hpp

#pragma once
 
#include <boost/json/conversion.hpp>
#include <boost/json/kind.hpp>
#include <boost/json/value.hpp>
#include <boost/json/value_to.hpp>
 
#include <stdexcept>
 
namespace rpc {

struct JsonBool {
    bool value = false;

    operator bool() const
    {
        return value;
    }
};

inline JsonBool
tag_invoke(boost::json::value_to_tag<JsonBool> const&, boost::json::value const& jsonValue)
{
    switch (jsonValue.kind()) {
        case boost::json::kind::null:
            return JsonBool{false};
        case boost::json::kind::bool_:
            return JsonBool{jsonValue.as_bool()};
        case boost::json::kind::uint64:
            [[fallthrough]];
        case boost::json::kind::int64:
            return JsonBool{jsonValue.as_int64() != 0};
        case boost::json::kind::double_:
            return JsonBool{jsonValue.as_double() != 0.0};
        case boost::json::kind::string:
            // Also should be `jsonValue.as_string() != "false"` but rippled doesn't do
            // that. Anyway for v2 api we have bool validation
            return JsonBool{!jsonValue.as_string().empty() && jsonValue.as_string()[0] != 0};
        case boost::json::kind::array:
            return JsonBool{!jsonValue.as_array().empty()};
        case boost::json::kind::object:
            return JsonBool{!jsonValue.as_object().empty()};
    }
    throw std::runtime_error("Invalid json value");
}
 
}  // namespace rpc