PodioUtil.hpp

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// This file is part of the Acts project.
//
// Copyright (C) 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/EventData/SourceLink.hpp"
#include "Acts/Geometry/GeometryIdentifier.hpp"
#include "Acts/Geometry/TrackingGeometry.hpp"
#include "Acts/Utilities/Helpers.hpp"

#include <limits>
#include <memory>

namespace ActsPodioEdm {
class Surface;
}

namespace Acts::PodioUtil {

using Identifier = uint64_t;
constexpr Identifier kNoIdentifier = std::numeric_limits<Identifier>::max();
constexpr int kNoSurface = -1;

// @TODO: We might want to consider making this a type erased type that's not an interface
class ConversionHelper {
 public:
  virtual std::optional<Identifier> surfaceToIdentifier(
      const Surface& surface) const = 0;
  virtual const Surface* identifierToSurface(Identifier identifier) const = 0;

  virtual Identifier sourceLinkToIdentifier(const SourceLink& sl) = 0;
  virtual SourceLink identifierToSourceLink(Identifier identifier) const = 0;
};

std::shared_ptr<const Surface> convertSurfaceFromPodio(
    const ConversionHelper& helper, const ActsPodioEdm::Surface& surface);

ActsPodioEdm::Surface convertSurfaceToPodio(const ConversionHelper& helper,
                                            const Acts::Surface& surface);

}  // namespace Acts::PodioUtil