/*

* 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 the License "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:  Definition of CHttpCacheStreamHandler

*

*/

#ifndef CHTTPCACHESTREAMHANDLER_H

#define CHTTPCACHESTREAMHANDLER_H

//  INCLUDES

#include <e32base.h>

#include <f32file.h>

#include <s32file.h>

#include "HttpCacheHandler.h"

// CONSTANTS

// MACROS

// DATA TYPES

// FUNCTION PROTOTYPES

// FORWARD DECLARATIONS

class CHttpCacheEntry;

class RFileWriteStream;

class RFileReadStream;

class CHttpCacheFileWriteHandler;

class CSegmentedHeapBuffer;

// CLASS DECLARATION

/**

*

*  @lib

*  @since 3.1

*/

class CHttpCacheStreamHandler : public CBase

    {

    public:  // Constructors and destructor

        /**

        * Two-phased constructor.

        * @since 3.1

        * @param

        * @param

        * @return CHttpCacheStreamHandler object.

        */

        static CHttpCacheStreamHandler* NewL( const TDesC& aDirectory, TInt aCriticalLevel, RFs& aRFs );

        /**

        * Destructor.

        */

        virtual ~CHttpCacheStreamHandler();

    public: // new functions

        void InitialiseCacheEntryL(CHttpCacheEntry& aCacheEntry);

        /**

        *

        * @since 3.1

        * @param

        * @return

        */

        inline TInt SavedContentSize() const { return iContentSize; }

        /**

        *

        * @since 3.1

        * @param

        * @return

        */

        inline void SetSavedContentSize( TInt aContentSize ) { iContentSize = aContentSize; }

        /**

        *

        * @since 3.1

        * @param

        * @return

        */

        void Erase( CHttpCacheEntry& aCacheEntry );

        /**

        *

        * @since 3.1

        * @param

        * @return

        */

        HBufC8* HeadersL( CHttpCacheEntry& aCacheEntry );

        /**

        *

        * @since 3.1

        * @param

        * @return

        */

        HBufC8* NextChunkL( CHttpCacheEntry& aCacheEntry, TBool& aLastChunk );

        /**

        *

        * @since 3.1

        * @param

        * @return

        */

        TBool SaveHeaders( CHttpCacheEntry& aCacheEntry, const TDesC8& aHeaderStr );

        /**

        *

        * @since 3.1

        * @param

        * @return

        */

        void RemoveHeaders( CHttpCacheEntry& aCacheEntry );

        /**

        *

        * @since 3.1

        * @param

        * @return

        */

        TBool SaveBodyData( CHttpCacheEntry& aCacheEntry, const TDesC8& aBodyStr );

        /**

        *

        * @since 3.1

        * @param

        * @return

        */

        void RemoveBodyData( CHttpCacheEntry& aCacheEntry );

        /**

        * Flush

        * @since 3.1

        * @param

        * @return

        */

        TBool Flush( CHttpCacheEntry& aCacheEntry );

        /**

        * FlushL

        * @since 7.1

        * @param

        * @return

        */

        TBool FlushL( CHttpCacheEntry& aCacheEntry );

        /**

        * FlushAsync

        * @since 7.1

        * @param

        * @return

        */

        TBool FlushAsync( CHttpCacheEntry& aCacheEntry , TRequestStatus& aStatus);

        /**

        *

        * @since 7.1

        * @param

        * @return

        */

        TBool OpenBodyFile( CHttpCacheEntry& aCacheEntry );

        /**

        *

        * @since 7.1

        * @param

        * @return

        */

        TBool CreateNewBodyFile( CHttpCacheEntry& aCacheEntry, TBool aUseDirectIO = EFalse );

    private:

        /**

        * Construct.

        * @since 3.1

        * @param

        * @param

        * @return CacheHandler object.

        */

        CHttpCacheStreamHandler(RFs& aRFs);

        /**

        * By default Symbian 2nd phase constructor is private.

        */

        void ConstructL( const TDesC& aDirectory, TInt aCriticalLevel );

    private:

        /**

        *

        * @since 3.1

        * @param

        * @return

        */

        TBool IsDiskSpaceAvailable( TInt aContentSize );

        /**

        *

        * @since 7.1

        * @param

        * @return

        */

        void FindCacheEntryIndex( const CHttpCacheEntry& aCacheEntry, TInt* aIndex );

    private:    // Data

        //

        RFs                                 iRfs;

        // attached entries

        CArrayPtrFlat<CHttpCacheEntry>*     iActiveEntries;     // owned

        //

        TInt                                iContentSize;

        //

        TDriveUnit                          iDrive;

        //

        TInt64                              iCriticalLevel;

    };

#endif      // CHTTPCACHESTREAMHANDLER_H

// End of File