AsyncLoadedInteriorLabelAnchorCategoryMapper.h

// Copyright eeGeo Ltd (2012-2014), All Rights Reserved

#pragma once

#include "IInteriorLabelAnchorCategoryMapper.h"
#include "Types.h"
#include "Labels.h"
#include "LabelLayer.h"
#include "LabelAnchorCategory.h"
#include "CallbackCollection.h"
#include "IInteriorLabelAnchorCategoryMapperFactory.h"




namespace Eegeo
{
    namespace Resources
    {
        namespace Interiors
        {
            namespace Builder
            {
                // Wrapper type allowing deferred creation of IInteriorLabelAnchorCategoryMapper instance, pending data fetch / load.
                // An implementation of IInteriorLabelAnchorCategoryMapper returns NULL for GetAnchorCategory until it receives callback
                // with InteriorLabelCategoryParserResult, allowing it to construct an InteriorLabelAnchorCategoryMapper instance.
                class AsyncLoadedInteriorLabelAnchorCategoryMapper : public IInteriorLabelAnchorCategoryMapper
                {
                public:
                    AsyncLoadedInteriorLabelAnchorCategoryMapper(Labels::ILabelAnchorCategoryRepository& labelAnchorCategoryRepository,
                                                                 const Labels::LabelLayer::IdType& labelLayerId,
                                                                 const std::string& defaultCategoryId,
                                                                 IInteriorLabelAnchorCategoryMapperFactory& factory,
                                                                 Helpers::CallbackCollection1<const InteriorLabelCategoryParserResult>& interiorLabelCategoryLoaderObserver);
                    
                    ~AsyncLoadedInteriorLabelAnchorCategoryMapper();
                    
                    const Labels::LabelAnchorCategory* GetAnchorCategory(const Entities::InteriorsEntityMetadata& interiorEntityMetadata) const;
                    
                private:
                    void OnInteriorLabelCategoryLoaded(const InteriorLabelCategoryParserResult& parserResult);
                    
                    void RegisterDefaultCategory();
                    void UnregisterDefaultCategory();
                    
                    Labels::ILabelAnchorCategoryRepository& m_labelAnchorCategoryRepository;
                    const Labels::LabelLayer::IdType m_labelLayerId;
                    const std::string m_defaultCategory;
                    IInteriorLabelAnchorCategoryMapperFactory& m_factory;
                    Helpers::CallbackCollection1<const InteriorLabelCategoryParserResult>& m_interiorLabelCategoryLoaderObserver;
                    Helpers::TCallback1<AsyncLoadedInteriorLabelAnchorCategoryMapper, const InteriorLabelCategoryParserResult> m_interiorLabelCategoryLoadedHandler;
                    IInteriorLabelAnchorCategoryMapper* m_pInstance;
                };
            }
        }
    }
}