sparkle/libs/utils/functions.hpp

#ifndef UTILS_FUNCTIONS_HPP_
#define UTILS_FUNCTIONS_HPP_
#include <optional>
#include <string>
#include <nlohmann/json.hpp>
struct functions {
    static inline auto isNull(const nlohmann::json& str) -> std::string {
        return str.is_null() ? str.dump() : str.get<std::string>();
    }
    template<typename T>
    static auto testValue(const nlohmann::json& data, const std::vector<std::string>& keys) -> std::optional<T> {
        const nlohmann::json* current = &data;
        for (const auto& key : keys) {
            if (current->contains(key)) {
                current = &(*current)[key];
            } else {
                return std::nullopt;
            }
        }
        if constexpr (std::is_same_v<T, bool>) {
            if (current->is_boolean()) {
                return current->get<bool>();
            }
        } else if constexpr (std::is_same_v<T, int>) {
            if (current->is_number_integer()) {
                return current->get<int>();
            }
        } else if constexpr (std::is_same_v<T, double>) {
            if (current->is_number_float()) {
                return current->get<double>();
            }
        } else if constexpr (std::is_same_v<T, std::string>) {
            if (current->is_string()) {
                return current->get<std::string>();
            }
        }
        return std::nullopt;
    }
};
#endif