/**
 * Stone of Orthanc
 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
 * Department, University Hospital of Liege, Belgium
 * Copyright (C) 2017-2019 Osimis S.A., Belgium
 *
 * This program is free software: you can redistribute it and/or
 * modify it under the terms of the GNU Affero General Public License
 * as published by the Free Software Foundation, either version 3 of
 * the License, or (at your option) any later version.
 *
 * This program 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
 * Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 **/


#pragma once

#include "MessageBroker.h"
#include "IMessage.h"

#include <Core/Toolbox.h>

namespace OrthancStone 
{
  class IObserver : public boost::noncopyable
  {
  private:
    MessageBroker&  broker_;
    // the following is a UUID that is used to disambiguate different observers
    // that may have the same address
    std::string     fingerprint_;
  public:
    IObserver(MessageBroker& broker)
      : broker_(broker)
      , fingerprint_(Orthanc::Toolbox::GenerateUuid())
    {
      LOG(TRACE) << "IObserver(" << std::hex << this << std::dec << ")::IObserver : fingerprint_ == " << fingerprint_;
      broker_.Register(*this);
    }

    virtual ~IObserver()
    {
      LOG(TRACE) << "IObserver(" << std::hex << this << std::dec << ")::~IObserver : fingerprint_ == " << fingerprint_;
      broker_.Unregister(*this);
    }

    const std::string& GetFingerprint() const
    {
      return fingerprint_;
    }

    MessageBroker& GetBroker() const
    {
      return broker_;
    }
  };
}