#ifndef MANTID_API_ALGORITHMOBSERVER_H_
#define MANTID_API_ALGORITHMOBSERVER_H_

//----------------------------------------------------------------------
// Includes
//----------------------------------------------------------------------
#include "MantidAPI/DllConfig.h"
#include "MantidAPI/Algorithm.h"
#include "MantidAPI/AlgorithmManager.h"
#include <Poco/NObserver.h>

namespace Mantid {
namespace API {
/**
 Observes Algorithm notifications: start,progress,finish,error.
 Hides Poco::Notification API from the user.

 Copyright &copy; 2007-2012 ISIS Rutherford Appleton Laboratory, NScD Oak Ridge
 National Laboratory & European Spallation Source

 This file is part of Mantid.

 Mantid is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation; either version 3 of the License, or
 (at your option) any later version.

 Mantid is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
class MANTID_API_DLL AlgorithmObserver {
public:
  AlgorithmObserver();
  AlgorithmObserver(IAlgorithm_const_sptr alg);
  virtual ~AlgorithmObserver();

  void observeAll(IAlgorithm_const_sptr alg);
  void observeProgress(IAlgorithm_const_sptr alg);
  void observeStarting();
  void observeStart(IAlgorithm_const_sptr alg);
  void observeFinish(IAlgorithm_const_sptr alg);
  void observeError(IAlgorithm_const_sptr alg);

  void stopObserving(IAlgorithm_const_sptr alg);
  void stopObservingManager();

  virtual void progressHandle(const IAlgorithm *alg, double p,
                              const std::string &msg);
  virtual void startingHandle(IAlgorithm_sptr alg);
  virtual void startHandle(const IAlgorithm *alg);
  virtual void finishHandle(const IAlgorithm *alg);
  virtual void errorHandle(const IAlgorithm *alg, const std::string &what);

private:
  void
  _progressHandle(const Poco::AutoPtr<Algorithm::ProgressNotification> &pNf);
  /// Poco::NObserver for Algorithm::ProgressNotification.
  Poco::NObserver<AlgorithmObserver, Algorithm::ProgressNotification>
      m_progressObserver;

  void _startHandle(const Poco::AutoPtr<Algorithm::StartedNotification> &pNf);
  /// Poco::NObserver for Algorithm::StartedNotification.
  Poco::NObserver<AlgorithmObserver, Algorithm::StartedNotification>
      m_startObserver;

  void _finishHandle(const Poco::AutoPtr<Algorithm::FinishedNotification> &pNf);
  /// Poco::NObserver for Algorithm::FinishedNotification.
  Poco::NObserver<AlgorithmObserver, Algorithm::FinishedNotification>
      m_finishObserver;

  void _errorHandle(const Poco::AutoPtr<Algorithm::ErrorNotification> &pNf);
  /// Poco::NObserver for Algorithm::ErrorNotification.
  Poco::NObserver<AlgorithmObserver, Algorithm::ErrorNotification>
      m_errorObserver;

  void _startingHandle(const Poco::AutoPtr<AlgorithmStartingNotification> &pNf);
  /// Poco::NObserver for API::AlgorithmStartingNotification
  Poco::NObserver<AlgorithmObserver, AlgorithmStartingNotification>
      m_startingObserver;
};

} // namespace API
} // namespace Mantid

#endif /*MANTID_API_ALGORITHMOBSERVER_H_*/