/*

* Copyright (c) 2006 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:  Container store content manager.

*

*/

#ifndef __CONTAINER_STORE_CONTENT_MANAGER_H__

#define __CONTAINER_STORE_CONTENT_MANAGER_H__

// ========

// INCLUDES

// ========

#include <e32base.h>

//<cmail>

//</cmail>

#include "ContainerStore.h"

// ====================

// FORWARD DECLARATIONS

// ====================

class CContainerStoreUtils;

class CContainerStoreEncryption;

class CBufferedReader;

class CBufferedWriter;

// =======

// CLASSES

// =======

class CContainerStoreContentManager : public CBase

    {

    public:

        static CContainerStoreContentManager* NewL( CContainerStoreUtils&      aUtils,

                                                    CContainerStoreEncryption& aEncryption );

        virtual ~CContainerStoreContentManager();          

        static void WipeContentFiles( RFs& aFs ); 

		TUint ContentLengthL( TContainerId aId, TBool aIsEncrypted );

		void ReplaceContentL( TContainerId  aId, 

							  const TDesC8& aContent,

                              TBool         aIsContentEncrypted );

		void ReplaceContentL( TContainerId aId, 

							  RFile&       aContentFile,

                              TBool        aIsContentEncrypted );

		void AppendContentL( TContainerId  aId, 

							 const TDesC8& aContent,

                             TBool         aIsContentEncrypted );

        void PrependContentL( TContainerId  aId, 

                             const TDesC8& aContent,

                             TBool         aIsContentEncrypted );

        void RemoveContentL( TContainerId aId );

		// will truncate the content if the content buffer is too small							

		void FetchContentL( TContainerId aId,					

						    TDes8&      aContent,

                            TBool       aIsContentEncrypted,

						    TUint       aStartPosition = 0 );

		void FetchContentL( TContainerId aId,

							RFile&       aDestinationFile,

                            TBool        aIsContentEncrypted );

        void OpenContentFileL( TContainerId aId, 

                               RFs& aFs, 

                               RFile& aFile,

                               TBool aIsContentEncrypted );

		void CopyContentL( TContainerId aOldId, 

		                   TContainerId aNewId );

        TBool SearchContentL( TContainerId aContainerId, 

                              const TDesC& aSearchString,

                              TDes8&       aSearchBuffer,

                              TBool        aIsContentEncrypted ); 

        void EncryptL( TContainerId aId );

        void DecryptL( TContainerId aId );

        void StartCopyTransaction();

        void RollbackCopyTransaction();

        /**

         * Transfer the ownership of an external content file to the content

         * manager.

         * @param aContentPath path and file name of an existing content file

         */

        TInt TransferContentFile(

            TContainerId aId, 

            const TDesC& aContentPath );

	private:

        CContainerStoreContentManager( CContainerStoreUtils&      aUtils,

                                       CContainerStoreEncryption& aEncryption );

        void ConstructL();

        void CleanupTemporaryFile();

        void CreateContentSubdirectoriesL();

		void ContentFilename( TContainerId aId, TDes& aFilename );		        

		void CommitTemporaryFileL( TInt aResult, TContainerId aContainerId );

        TBool EncryptAndWriteNextBlockL( CBufferedWriter& aBufferedWriter, 

                                         const TDesC8&    aPlaintextBuffer );

        TBool ReadNextBlockL( CBufferedReader& aBufferedReader, 

                              TDes8&           aPlaintextBlock,

                              TBool            aIsContentEncrypted = ETrue );

        void UpdateBlockSizeL(  TBool isEncrypted );

        TInt FindVomitCode( TPtr16& aBody );

	private:

        CContainerStoreUtils&      iUtils;

        CContainerStoreEncryption& iEncryption;

        RFs&                       iFs;

        TFileName                  iTemporaryFilename; 

        TFileName                  iEncryptDecryptTempFilename;

        TInt                       iBlockSize;        

        //used to store content file ids when copying a message so they can be

        //rolled back if the transaction fails.

        RArray<TContainerId>       iCopiedContentFiles;

        __LOG_DECLARATION

    }; // end CContainerStoreContentManager

#endif