vtkInvoker.h

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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
#ifndef vtkInvoker_h
#define vtkInvoker_h

#include "vtkObject.h"

#include "vtkCommonCoreModule.h" // for export macro
#include "vtkLogger.h"           // for vtkLogger::Verbosity enum
#include "vtkMarshalContext.h"   // for vtkMarshalContext
#include "vtkSmartPointer.h"     // for vktSmartPointer

// clang-format off
#include "vtk_nlohmannjson.h"            // for json
#include VTK_NLOHMANN_JSON(json_fwd.hpp) // for json
// clang-format on

#include <memory>   // for unique_ptr
#include <typeinfo> // for type_info

VTK_ABI_NAMESPACE_BEGIN

class VTKCOMMONCORE_EXPORT vtkInvoker : public vtkObject
{
public:
  static vtkInvoker* New();
  vtkTypeMacro(vtkInvoker, vtkObject);
  void PrintSelf(ostream& os, vtkIndent indent) override;

  using HandlerType =
    std::function<nlohmann::json(vtkInvoker*, vtkObjectBase*, const char*, const nlohmann::json&)>;

  nlohmann::json Invoke(
    const vtkTypeUInt32& identifier, const std::string& methodName, const nlohmann::json& args);


  void RegisterHandler(const std::type_info& type, HandlerType Invoker);
  HandlerType GetHandler(const std::type_info& type) const;
  bool UnRegisterHandler(const std::type_info& type);


  vtkSetSmartPointerMacro(Context, vtkMarshalContext);
  vtkGetSmartPointerMacro(Context, vtkMarshalContext);


  void SetInvokerLogVerbosity(vtkLogger::Verbosity verbosity);
  vtkLogger::Verbosity GetInvokerLogVerbosity();

protected:
  vtkInvoker();
  ~vtkInvoker() override;

  vtkSmartPointer<vtkMarshalContext> Context;
  vtkLogger::Verbosity InvokerLogVerbosity = vtkLogger::VERBOSITY_INVALID;

private:
  vtkInvoker(const vtkInvoker&) = delete;
  void operator=(const vtkInvoker&) = delete;
  class vtkInternals;
  std::unique_ptr<vtkInternals> Internals;
};

VTK_ABI_NAMESPACE_END
#endif