Added missing file

new file:   JugReco/src/components/TrackFindingAlgorithm.h

JugReco/src/components/TrackFindingAlgorithm.h

+#ifndef JUGGLER_JUGRECO_TrackFindingAlgorithm_HH
+#define JUGGLER_JUGRECO_TrackFindingAlgorithm_HH
+
+#include "JugReco/GeometryContainers.hpp"
+
+// Gaudi
+#include "GaudiAlg/GaudiAlgorithm.h"
+#include "GaudiKernel/ToolHandle.h"
+//#include "GaudiAlg/Transformer.h"
+//#include "GaudiAlg/GaudiTool.h"
+//#include "GaudiKernel/RndmGenerators.h"
+#include "Gaudi/Property.h"
+
+#include "JugBase/DataHandle.h"
+#include "JugBase/IGeoSvc.h"
+
+//#include "Acts/Geometry/TrackingGeometry.hpp"
+//#include "Acts/Plugins/DD4hep/DD4hepDetectorElement.hpp"
+//#include "Acts/Utilities/Definitions.hpp"
+//#include "Acts/Utilities/Helpers.hpp"
+//#include "Acts/Utilities/Logger.hpp"
+
+#include <functional>
+#include <stdexcept>
+#include <vector>
+
+#include "JugReco/SourceLinks.h"
+#include "JugReco/Track.hpp"
+#include "JugReco/BField.h"
+
+#include "eicd/TrackerHitCollection.h"
+
+//#include "Acts/Surfaces/PerigeeSurface.hpp"
+#include "Acts/Geometry/TrackingGeometry.hpp"
+#include "Acts/TrackFinder/CKFSourceLinkSelector.hpp"
+#include "Acts/TrackFinder/CombinatorialKalmanFilter.hpp"
+
+//#include "Acts/Fitter/GainMatrixSmoother.hpp"
+//#include "Acts/Fitter/GainMatrixUpdater.hpp"
+//#include "Acts/MagneticField/ConstantBField.hpp"
+//#include "Acts/MagneticField/InterpolatedBFieldMap.hpp"
+//#include "Acts/MagneticField/SharedBField.hpp"
+//#include "Acts/Propagator/EigenStepper.hpp"
+//#include "Acts/Propagator/Navigator.hpp"
+//#include "Acts/Propagator/Propagator.hpp"
+//#include "Acts/Utilities/Units.hpp"
+
+#include <random>
+#include <stdexcept>
+
+namespace Jug::Reco {
+
+  class TrackFindingAlgorithm : public GaudiAlgorithm {
+  public:
+    using TrackFinderResult = Acts::Result<Acts::CombinatorialKalmanFilterResult<SourceLink>>;
+
+    /// Track finding function that takes input measurements, initial trackstate
+    /// and track finder options and returns some track-finding-specific result.
+    using CKFOptions = Acts::CombinatorialKalmanFilterOptions<Acts::CKFSourceLinkSelector>;
+
+    using TrackFinderFunction =
+        std::function<TrackFinderResult(const SourceLinkContainer&, const TrackParameters&, const CKFOptions&)>;
+
+  public:
+    DataHandle<SourceLinkContainer>      m_inputSourceLinks{"inputSourceLinks", Gaudi::DataHandle::Reader, this};
+    DataHandle<TrackParametersContainer> m_inputInitialTrackParameters{"inputInitialTrackParameters",
+                                                                       Gaudi::DataHandle::Reader, this};
+    DataHandle<TrajectoryContainer>      m_outputTrajectories{"outputTrajectories", Gaudi::DataHandle::Writer, this};
+    TrackFinderFunction                  m_trackFinderFunc;
+    SmartIF<IGeoSvc>                     m_geoSvc;
+
+    std::shared_ptr<Acts::ConstantBField> m_BField = nullptr;
+    Acts::GeometryContext                 m_geoctx;
+    Acts::CalibrationContext              m_calibctx;
+    Acts::MagneticFieldContext            m_fieldctx;
+
+    Acts::CKFSourceLinkSelector::Config m_sourcelinkSelectorCfg;
+
+    TrackFindingAlgorithm(const std::string& name, ISvcLocator* svcLoc);
+
+    /** Create the track finder function implementation.
+     *  The magnetic field is intentionally given by-value since the variant
+     *  contains shared_ptr anyways.
+     */
+    static TrackFinderFunction makeTrackFinderFunction(std::shared_ptr<const Acts::TrackingGeometry> trackingGeometry,
+                                                       BFieldVariant                                 magneticField);
+
+    /// Type erased track finder function.
+    TrackFinderFunction findTracks;
+
+    StatusCode initialize() override;
+
+    StatusCode execute() override;
+  };
+
+} // namespace Jug::Reco
+
+#endif