ShapeModelRepositoryObserver.h

#pragma once

#include "EegeoShapes.h"
#include "Types.h"
#include "ModelRepository.h"

namespace Eegeo
{
    namespace Shapes
    {
        template <
            typename ShapeModelRepositoryType,
            typename ShapeModelAddedEventType,
            typename ShapeModelRemovedEventType
            >
        class TShapeModelRepositoryObserver : public ShapeModelRepositoryType::ObserverType, private Eegeo::NonCopyable
        {
        public:
            TShapeModelRepositoryObserver(ShapeModelRepositoryType& shapeModelRepository,
                                          ShapeModelAddedEventType& shapeModelAddedEvent,
                                          ShapeModelRemovedEventType& shapeModelRemovedEvent)
            : m_shapeModelRepository(shapeModelRepository)
            , m_shapeModelAddedEvent(shapeModelAddedEvent)
            , m_shapeModelRemovedEvent(shapeModelRemovedEvent)
            {
                m_shapeModelRepository.AddObserver(*this);
            }
            
            virtual ~TShapeModelRepositoryObserver()
            {
                m_shapeModelRepository.RemoveObserver(*this);
            }
            
            virtual void OnItemAdded(const typename ShapeModelRepositoryType::ItemType& item)
            {
                m_shapeModelAddedEvent.Raise(*item);
            }
            
            virtual void OnItemRemoved(const typename ShapeModelRepositoryType::ItemType& item)
            {
                m_shapeModelRemovedEvent.Raise(*item);
            }
            
        private:
            ShapeModelRepositoryType& m_shapeModelRepository;
            ShapeModelAddedEventType& m_shapeModelAddedEvent;
            ShapeModelRemovedEventType& m_shapeModelRemovedEvent;
        };
    }
}