/////////////////////////////////////////////////////////////////////////////////
//
//  Copyright (C) 2014 Ceetron Solutions AS
//
//  <APPLICATION_NAME> 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.
//
//  <APPLICATION_NAME> 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 at <http://www.gnu.org/licenses/gpl.html>
//  for more details.
//
/////////////////////////////////////////////////////////////////////////////////

#include "cafNotificationCenter.h"

#include "cafAssert.h"

#include <QtGlobal>

#include <algorithm>

namespace caf
{
//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
NotificationCenter::NotificationCenter()
{
}

//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
NotificationCenter::~NotificationCenter()
{
    CAF_ASSERT( m_observers.size() == 0 );
}

//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
void NotificationCenter::registerObserver( DataModelObserver* observer )
{
    std::vector<DataModelObserver*>::iterator it = std::find( m_observers.begin(), m_observers.end(), observer );
    if ( it == m_observers.end() )
    {
        m_observers.push_back( observer );
    }
}

//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
void NotificationCenter::removeObserver( DataModelObserver* observer )
{
    std::vector<DataModelObserver*>::iterator it = std::find( m_observers.begin(), m_observers.end(), observer );
    if ( it != m_observers.end() )
    {
        m_observers.erase( it );
    }
}

//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
void NotificationCenter::notifyObserversOfDataChange( caf::PdmObjectHandle* itemThatChanged )
{
    CAF_ASSERT( itemThatChanged );

    foreach ( DataModelObserver* o, m_observers )
    {
        o->handleModelNotification( itemThatChanged );
    }
}

//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
void NotificationCenter::notifyObservers()
{
    foreach ( DataModelObserver* o, m_observers )
    {
        o->handleModelNotification( nullptr );
    }
}

//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
void NotificationCenter::notifyObserversOfSelectionChange()
{
    foreach ( DataModelObserver* o, m_observers )
    {
        o->handleModelSelectionChange();
    }
}

} // end namespace caf