/*

* Copyright (c) 2008 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:  Handles duplicate detection for images and videos

*

*/

#ifndef __CMFMMDEDUPLICATEDETECTOR_H

#define __CMFMMDEDUPLICATEDETECTOR_H

#include <e32base.h>

#include <mdequery.h>

// Forward declarations

class CCmFillListItem;

class MCmFmItemHandlerObserver;

class CMdESession;

class CMdENamespaceDef;

class CMdEObjectDef;

class CMdEObjectQuery;

class CMdEPropertyDef;

// Class declarations

/**

 *  CCmFmMdEDuplicateDetector class

 *  Part of Fill manager. CCmFmMdEDuplicateDetector manages

 *  duplicate detection for images and videos

 *

 *  @lib cmfillmanager.lib

 *

 *  @since S60 5.1

 */

NONSHARABLE_CLASS( CCmFmMdEDuplicateDetector ) : public CBase,

                                  public MMdEQueryObserver

    {

public:    

    /**

     * Two-phased constructor.

     *

     * @since S60 5.1

     * @param aObserver, observer class

     * @param aSession, mde session

     * @return  pointer to CCmFmMdEDuplicateDetector class

     */

    static CCmFmMdEDuplicateDetector* NewL( 

        MCmFmItemHandlerObserver& aObserver, CMdESession& aSession );

    /**

     * Two-phased constructor.

     *

     * @since S60 5.1

     * @param aObserver, observer class  

     * @param aSession, mde session   

     * @return  pointer to CCmFmMdEDuplicateDetector class

     */

    static CCmFmMdEDuplicateDetector* NewLC( 

        MCmFmItemHandlerObserver& aObserver, CMdESession& aSession );

    /**

     * Destructor.

     */

    virtual ~CCmFmMdEDuplicateDetector();

public:

    /**

     * Check if file is duplicate.

     *

     * @since S60 5.1     

     * @param aItem, item to be checked

     * @return None

     */

    void CheckImageOrVideoL( const CCmFillListItem& aItem );

    /**

     * Add to items array for duplicated check

     * @param aItem, item to be append

     * @return None

     */

    void AppendToArrayL( const CCmFillListItem& aItem );

    /**

     * reset the duplicator check array

     * @param None

     * @return None

     */

    void ResetArray();

protected: 

// From base class MMdEQueryObserver  

    /**

     * From MMdEQueryObserver

     * See base class definition

     */

    void HandleQueryNewResults( CMdEQuery& aQuery,

                                TInt aFirstNewItemIndex,

                                TInt aNewItemCount );

    /**

     * From MMdEQueryObserver

     * See base class definition

     */

    void HandleQueryCompleted(CMdEQuery& aQuery, TInt aError); 

private:

    /**

     * Set logic condition for image and video item query

     *

     * @since S60 5.1        

     * @param aItem, item to be checked

     * @return None

     */    

    void SetLogicConditionL( const CCmFillListItem& aItem );    

    /**

     * Check if file is duplicate by compareing with array.

     * @param aItem, item to be checked

     * @return None

     */

    void CheckImageOrVideoLIfDuplicated( const CCmFillListItem& aItem );

private:

    /**

     * Performs the first phase of two phase construction.

     *

     * @since S60 5.1

     * @param aObserver, item handler observer

     * @param aSession, mde session

     */

    CCmFmMdEDuplicateDetector( MCmFmItemHandlerObserver& aObserver, 

        CMdESession& aSession );

    /**

     * Performs the second phase construction.

     */

    void ConstructL( );

private:

    /**

     * Observer class

     */

    MCmFmItemHandlerObserver& iObserver;

     /**

      * MdE session

      */

    CMdESession& iSession;

    /**

     * mde namespace

     */

    CMdENamespaceDef* iNamespace;               // owned

    /**

     * Object definition ( Image/Video )

     */

    CMdEObjectDef* iObjectDef;                  // owned

    /**

     * Object definition ( Image/Video )

     */

    CMdEObjectDef* iMediaTypeDef; // owned

    /**

     * Object query

     */

    CMdEObjectQuery* iQuery;                    // owned

    /**

     * Queried property

     */

    CMdEPropertyDef* iTitle;                    // owned

    /**

     * Queried property

     */

    CMdEPropertyDef* iSize;                     // owned

    /**

     * Queried property

     */

    CMdEPropertyDef* iDate;                     // owned

    /**

     * Item to be checked

     */

    CCmFillListItem* iCheckItem;

    /**

     * Array of fill list items

     */

    RPointerArray<CCmFillListItem> iExistFiles; // Owned

    /**

     * current download media type

     */

    TCmMediaType iCurrentMediaType;

    };

#endif //  __CMFMMDEDUPLICATEDETECTOR_H