type_to_json.h

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#pragma once
 
#include "fl/stl/json.h"
#include "fl/stl/string.h"
#include "fl/stl/vector.h"
#include "fl/remote/rpc/base64.h"
namespace fl {
namespace detail {
 
// =============================================================================
// Return type to JSON converter
// =============================================================================
 
template <typename T>
struct TypeToJson {
    static json convert(const T& value) {
        return json(value);
    }
};
 
template <>
struct TypeToJson<fl::string> {
    static json convert(const fl::string& value) {
        return json(value.c_str());
    }
};
 
// json identity conversion - pass json through unchanged
template <>
struct TypeToJson<fl::json> {
    static json convert(const json& value) {
        return value;
    }
};
 
// fl::vector<fl::u8> specialization - encodes binary data as base64 string.
template <>
struct TypeToJson<fl::vector<fl::u8>> {
    static json convert(const fl::vector<fl::u8>& value) {
        fl::string encoded = fl::base64_encode(value);
        return json(encoded.c_str());
    }
};
 
// fl::vector<T> conversion - converts vector to JSON array
template <typename T>
struct TypeToJson<fl::vector<T>> {
    static json convert(const fl::vector<T>& value) {
        json arr = json::array();
        for (fl::size i = 0; i < value.size(); i++) {
            arr.push_back(TypeToJson<T>::convert(value[i]));
        }
        return arr;
    }
};
 
template <>
struct TypeToJson<void> {
    static json convert() {
        return json(nullptr);
    }
};
 
} // namespace detail
} // namespace fl