/*

* 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:   Contains CNcdNodeDownload class

*

*/

#ifndef NCD_NODE_DOWNLOAD_H

#define NCD_NODE_DOWNLOAD_H

// For streams

#include <s32mem.h>

#include <badesca.h>

#include "catalogscommunicable.h"

#include "ncdnodeclassids.h"

class MNcdPreminetProtocolDataEntity;

class MNcdPurchaseDetails;

class MNcdPurchaseDownloadInfo;

/**

 *  CNcdNodeDownload does not handle db information directly. The information

 *  is Internalized from the purchase history data and also the data is saved

 *  to the purchase history when the purchase operation progresses.

 *

 *  This server side class contains the data and the functionality

 *  that the proxy objects will use to internalize itself.

 *

 *  This object should be added to the session. So, it will be usable

 *  in the proxy side by using the handle gotten during addition. 

 *  The handle is used to identify to what object the proxy directs 

 *  the function call.  When objects are added to sessions, 

 *  multiple handles may be gotten for the same object if addition is 

 *  done multiple times.

 *

 *  @lib ?library

 *  @since S60 v3.2

 */

class CNcdNodeDownload : public CCatalogsCommunicable

    {

public:

    /**

     * NewL

     *

     * @return CNcdNodeDownload* Pointer to the created object 

     * of this class.

     */

    static CNcdNodeDownload* NewL();

    /**

     * NewLC

     *

     * @return CNcdNodeDownload* Pointer to the created object 

     * of this class.

     */

    static CNcdNodeDownload* NewLC();

    /**

     * Destructor

     *

     * @note Because this is CCatalogsCommunicable function the

     * session that owns this object should delete this class object.

     * So, instead of directly deleting this object from some other

     * class. Close-method should be used instead.

     */

    virtual ~CNcdNodeDownload();

    /**

     * Retrieves the data type that informs what class the data is for.

     * By checking the data type information, an InternalizeL function

     * of a right class can be called when the object data is set

     * from the storage.

     * The data type may be decided and set in a object that creates this 

     * class object.

     *

     * @return NcdNodeClassIds::TNcdNodeClassId Describes the data type. 

     */

    NcdNodeClassIds::TNcdNodeClassId ClassId() const;

    /**

     * This function is called when the owner of this object

     * wants to internalize the content according to the data

     * that has been received from the purchase history.

     * 

     * @param aDetails Purchase details from purchase history.

     * @return ETrue if purchase details contained download

     * data to internalize.

     */

    TBool InternalizeL( const MNcdPurchaseDetails& aDetails );

    /**

     * Get download information.

     *

     * @return Download information.

     */

    const RPointerArray< MNcdPurchaseDownloadInfo >& DownloadInfo() const;

public: // CCatalogsCommunicable

    /**

     * @see CCatalogsCommunicable::ReceiveMessage

     */

    virtual void ReceiveMessage( MCatalogsBaseMessage* aMessage,

                                 TInt aFunctionNumber );

    /**

     * @see CCatalogsCommunicable::CounterPartLost

     */

    virtual void CounterPartLost( const MCatalogsSession& aSession );

protected:

    /**

     * Constructor

     * @param aClassId Identifies this class. 

     * Is set in the NewLC function 

     */

    CNcdNodeDownload( NcdNodeClassIds::TNcdNodeClassId aClassId );

    /**

     * ConstructL

     */

    virtual void ConstructL();

    // These functions are called from the ReceiveMessage when

    // the given function id has matched to the function.

    /**

     * This function is called when the proxy wants to get the

     * data from the serverside. This function calls the

     * InternalizeDataForRequestL which may be overloaded in the

     * child classes

     * @param aMessage Contains data from the proxy and can be used

     * to send data back to proxy

     */

    void InternalizeRequestL( MCatalogsBaseMessage& aMessage );

    /**

     * This function writes the object data to the stream. 

     * The stream content will be sent to the proxy that requested the data.

     * Child classes should add their own data after this parent data.

     * @param aStream The data content of this class object will be written

     * into this stream.

     */

    virtual void ExternalizeDataForRequestL( RWriteStream& aStream );

    /**

     * This function is called from the proxy side. When the proxy

     * is deleted.

     * @param aMessage Contains data from the proxy and can be used

     * to send data back to proxy

     */

    void ReleaseRequest( MCatalogsBaseMessage& aMessage ) const;

    void FilesExistRequestL( MCatalogsBaseMessage& aMessage );

    /**

     * Checks that all downloaded files actually exist in the file system

     */

    TBool FilesExist();

private:

    // Prevent these two if they are not implemented

    CNcdNodeDownload( const CNcdNodeDownload& aObject );

    CNcdNodeDownload& operator =( const CNcdNodeDownload& aObject );

private: // data

    // The class id identifies this class. The id may be used to identify

    // what kind of class object is created when data is gotten from the db.

    NcdNodeClassIds::TNcdNodeClassId iClassId;

    // Download info array.

    RPointerArray< MNcdPurchaseDownloadInfo > iDownloadInfo;

    CDesCArrayFlat* iFiles;

    // Indicates download status.

    TBool iIsDownloaded;

    // The message is set when ReceiveMessage is called. The message

    // is used in the CounterPartLost-function that informs the message

    // if the session has been lost.

    MCatalogsBaseMessage* iMessage;

    };

#endif // NCD_NODE_DOWNLOAD_H