VolumeBoundsJsonConverter.hpp

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// This file is part of the Acts project.
//
// Copyright (C) 2022-2023 CERN for the benefit of the Acts project
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.

#pragma once

#include "Acts/Definitions/Algebra.hpp"
#include "Acts/Geometry/GenericCuboidVolumeBounds.hpp"
#include "Acts/Geometry/VolumeBounds.hpp"
#include "Acts/Plugins/Json/ActsJson.hpp"

#include <array>
#include <cstddef>
#include <memory>
#include <string>
#include <vector>

#include <nlohmann/json.hpp>

// Custom Json encoder/decoders. Naming is mandated by nlohmann::json and thus
// can not match our naming guidelines.
namespace Acts {

class VolumeBounds;

void to_json(nlohmann::json& j, const VolumeBounds& bounds);

namespace VolumeBoundsJsonConverter {

nlohmann::json toJson(const VolumeBounds& bounds);

template <typename bounds_t>
std::unique_ptr<bounds_t> fromJson(const nlohmann::json& jVolumeBounds) {
  constexpr size_t kValues = bounds_t::BoundValues::eSize;
  std::array<ActsScalar, kValues> bValues{};
  std::vector<ActsScalar> bVector = jVolumeBounds["values"];
  std::copy_n(bVector.begin(), kValues, bValues.begin());
  return std::make_unique<bounds_t>(bValues);
}

std::unique_ptr<VolumeBounds> fromJson(const nlohmann::json& jVolumeBounds);

}  // namespace VolumeBoundsJsonConverter

// This macro creates a conversion for the volume bounds type
NLOHMANN_JSON_SERIALIZE_ENUM(
    VolumeBounds::BoundsType,
    {{VolumeBounds::BoundsType::eCone, "Cone"},
     {VolumeBounds::BoundsType::eCuboid, "Cuboid"},
     {VolumeBounds::BoundsType::eCutoutCylinder, "CutoutCylinder"},
     {VolumeBounds::BoundsType::eCylinder, "Cylinder"},
     {VolumeBounds::BoundsType::eGenericCuboid, "GenericCuboid"},
     {VolumeBounds::BoundsType::eTrapezoid, "Trapezoid"}})

}  // namespace Acts