/*

* Copyright (c) 2002-2009 Nokia Corporation and/or its subsidiary(-ies). 

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description: 

*

*/

#ifndef CCLFENGINEIMPL_H

#define CCLFENGINEIMPL_H

//  INCLUDES

#include "MCLFContentListingEngine.h"

#include "MCLFEventHandlerObserver.h"

#include "MCLFProcessObserver.h"

#include "CCLFServerProxy.h"

#include "MCLFItemProviderObserver.h"

#include "MCLFChangedItemProvider.h"

#include <MCLFItem.h>

#include <badesca.h>

#include <mdesession.h>

// FORWARD DECLARATIONS

class CCLFEventHandler;

class CCLFDbItemContainer;

class CCLFDbItemProvider;

class CCLFQueryAdapter;

class CCLFServerProxy;

// CLASS DECLARATION

/**

*  Implements MCLFContentListingEngine, MCLFEventHandlerObserver and MCLFItemProviderObserver

*  interfaces

*

*  @lib ContentListingFramework.lib

*  @since Series 60 3.0

*/

NONSHARABLE_CLASS( CCLFEngineImpl ) : public CBase,

                                      public MCLFContentListingEngine,

                                      public MCLFEventHandlerObserver,

                                      public MCLFItemProviderObserver,

                                      public MMdESessionObserver

    {

    private:

        NONSHARABLE_CLASS( CCLFTempModel ) : public CBase,

                                             public MCLFChangedItemProvider

            {

            public: // Constructors and destructor

                /**

                * Two-phased constructor.

                */

                CCLFTempModel();

                 /**

                * Destructor.

                */               

                virtual ~CCLFTempModel();

            public: // New functions

                void AddObserverL( MCLFChangedItemProviderObserver* aObserver );

                void ResetModelArray();

                void NotifyObserverL();

            protected: // Functions from base classes

                /**

                * From MCLFChangedItemProvider

                */

                TBool IsItemsForModel(

                                const MDesCArray& aMimeTypes,

                                const TArray<TInt>& aMediaTypes,

                                const TArray<TCLFItemId>& aModelItemIds );

                /**

                * From MCLFChangedItemProvider

                */

                void RemoveChangedItemProviderObserver(

                            MCLFChangedItemProviderObserver* aObserver );

            protected: // New functions

                void PrepareModelL();

            public: // Data

                // Own: temp model for changed items

                RPointerArray<MCLFItem> iItemArray;

                RArray<TCLFItemId> iChangedItemIdArray;

            private: // Data

                // Ref. observers

                RPointerArray<MCLFChangedItemProviderObserver>

                                            iChangedItemProviderObserverArray;

                CDesCArraySeg iMimeTypeArray;

                RArray<TInt> iMediaTypeArray;

            };

    public:  // Constructors and destructor

        /**

        * Two-phased constructor.

        */

        static CCLFEngineImpl* NewLC();

        /**

        * Destructor.

        */

        virtual ~CCLFEngineImpl();

    protected:  // Functions from base classes

        /**

        * From MCLFContentListingEngine

        */

        MCLFItemListModel* CreateListModelLC(

                                    MCLFOperationObserver& aObserver );

        /**

        * From MCLFContentListingEngine

        */

        MCLFItemListModel* CreateListModelLC(

                                    MCLFOperationObserver& aObserver,

                                    TResourceReader& aReader );

        /**

        * From MCLFContentListingEngine

        */

        void UpdateItemsL();

        /**

        * From MCLFContentListingEngine

        */

        void UpdateItemsL( const TArray<TCLFItemId>& aItemIDArray );

        /**

        * From MCLFContentListingEngine

        */

        void AddChangedItemObserverL(

                                    MCLFChangedItemObserver& aObserver );

        /**

        * From MCLFContentListingEngine

        */

        void RemoveChangedItemObserver(

                                    MCLFChangedItemObserver& aObserver );

        /**

        * From MCLFContentListingEngine

        */

        void UpdateItemsL( TInt aSemanticId, const TDesC8& aOpaqueData );

        /**

        * From MCLFContentListingEngine

        */

        void AddCLFProcessObserverL(

                        MCLFProcessObserver& aObserver );

        /**

        * From MCLFContentListingEngine

        */

        void RemoveCLFProcessObserver(

                        MCLFProcessObserver& aObserver );

        /**

        * From MCLFEventHandlerObserver

        */

        void HandleUpdateEndEventL( TInt aError );

        /**

        * From MCLFEventHandlerObserver

        */

        void HandleUpdateStartEventL( TInt aError );

        /**

        * From MCLFItemProviderObserver

        */

        void OperationCompleteL( TInt aError );

        /**

         * From MMdESessionObserver

         */

        void HandleSessionOpened( CMdESession& aSession, TInt aError );

        /**

         * From MMdESessionObserver

         */

        void HandleSessionError( CMdESession& aSession, TInt aError );

    private:  // New functions

        void StopEventHandling();

        void NotifyProcessObserversL( TCLFProcessEvent aEvent );

        static void CleanupTempModel( TAny* aObj );

    private:

        /**

        * C++ default constructor.

        */

        CCLFEngineImpl();

        /**

        * By default Symbian 2nd phase constructor is private.

        */

        void ConstructL();

    private:    // Data

        // Own

        CCLFServerProxy* iCLFServerProxy;

        // Own

        CMdESession* iMdESession;

        // Own

        TInt iError;

        // Own

        CActiveSchedulerWait iActiveSchedulerWait;

        // Own

        CCLFEventHandler* iUpdateStartEventHandler;

        // Own

        CCLFEventHandler* iUpdateEndEventHandler;

        // Ref. observers

        RPointerArray< MCLFChangedItemObserver > iChangedItemObserverArray;

        // Ref. observers

        RPointerArray< MCLFProcessObserver > iProcessObserverArray;

        // Own:

        CCLFDbItemContainer* iDbItemContainer;

        // Own. to get changed items

        CCLFDbItemProvider* iItemProvider;

        // Own:

        CCLFTempModel iChangedItemModel;

        // Own

        CCLFQueryAdapter* iQueryAdapter;        

    };

#endif      // CCLFENGINEIMPL_H

// End of File