Function makeGeoJSONGeometry

include/engine/api/json_factory.hpp:60–85

template <typename ForwardIter>
util::json::Object makeGeoJSONGeometry(ForwardIter begin, ForwardIter end)
{
    auto num_coordinates = std::distance(begin, end);
    BOOST_ASSERT(num_coordinates != 0);
    util::json::Object geojson;
    geojson.values["type"] = "LineString";
    util::json::Array coordinates;
    if (num_coordinates > 1)
    {
        coordinates.values.reserve(num_coordinates);
        auto into = std::back_inserter(coordinates.values);
        std::transform(begin, end, into, &detail::coordinateToLonLat);
    }
    else if (num_coordinates > 0)
    {
        // For a single location we create a [location, location] LineString
        // instead of a single Point making the GeoJSON output consistent.
        coordinates.values.reserve(2);
        auto location = detail::coordinateToLonLat(*begin);
        coordinates.values.push_back(location);
        coordinates.values.push_back(location);
    }
    geojson.values["coordinates"] = util::json::Value{std::move(coordinates)};

    return geojson;
}

util::json::Object makeStepManeuver(const guidance::StepManeuver &maneuver);