Function argumentsToRouteParameter

include/nodejs/node_osrm_support.hpp:1088–1215

}

inline route_parameters_ptr argumentsToRouteParameter(const Napi::CallbackInfo &args,
                                                      bool requires_multiple_coordinates)
{
    route_parameters_ptr params = std::make_unique<osrm::RouteParameters>();
    bool has_base_params = argumentsToParameter(args, params, requires_multiple_coordinates);
    if (!has_base_params)
        return route_parameters_ptr();

    Napi::Object obj = args[0].As<Napi::Object>();

    if (obj.Has("continue_straight"))
    {
        auto value = obj.Get("continue_straight");
        if (value.IsEmpty())
            return route_parameters_ptr();

        if (!value.IsBoolean() && !value.IsNull())
        {
            ThrowError(args.Env(), "'continue_straight' param must be boolean or null");
            return route_parameters_ptr();
        }
        if (value.IsBoolean())
        {
            params->continue_straight = value.ToBoolean().Value();
        }
    }

    if (obj.Has("alternatives"))
    {
        auto value = obj.Get("alternatives");
        if (value.IsEmpty())
            return route_parameters_ptr();

        if (value.IsBoolean())
        {
            params->alternatives = value.ToBoolean().Value();
            params->number_of_alternatives = value.ToBoolean().Value() ? 1u : 0u;
        }
        else if (value.IsNumber())
        {
            params->alternatives = value.ToBoolean().Value();
            params->number_of_alternatives = value.ToNumber().Int32Value();
        }
        else
        {
            ThrowError(args.Env(), "'alternatives' param must be boolean or number");
            return route_parameters_ptr();
        }
    }

    if (obj.Has("waypoints"))
    {
        Napi::Value waypoints = obj.Get("waypoints");
        if (waypoints.IsEmpty())
            return route_parameters_ptr();

        // must be array
        if (!waypoints.IsArray())