json.h

#pragma once

#include <winrt/Windows.Foundation.h>
#include <winrt/Windows.Foundation.Collections.h>
#include <winrt/Windows.Data.Json.h>

#include <optional>

namespace json
{
    using namespace winrt::Windows::Data::Json;

    std::optional<JsonObject> from_file(std::wstring_view file_name);

    void to_file(std::wstring_view file_name, const JsonObject& obj);

    inline bool has(
        const json::JsonObject& o,
        std::wstring_view name,
        const json::JsonValueType type = JsonValueType::Object)
    {
        return o.HasKey(name) && o.GetNamedValue(name).ValueType() == type;
    }

    template<typename T>
    inline std::enable_if_t<std::is_arithmetic_v<T>, JsonValue> value(const T arithmetic)
    {
        return json::JsonValue::CreateNumberValue(arithmetic);
    }

    template<typename T>
    inline std::enable_if_t<!std::is_arithmetic_v<T>, JsonValue> value(T s)
    {
        return json::JsonValue::CreateStringValue(s);
    }

    inline JsonValue value(const bool boolean)
    {
        return json::JsonValue::CreateBooleanValue(boolean);
    }

    inline JsonValue value(JsonObject value)
    {
        return value.as<JsonValue>();
    }

    inline JsonValue value(JsonValue value)
    {
        return value; // identity function overload for convenience
    }
}