/*

* 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:  Presence Service Connection presentity presence subscription implementation.

*

*/

#ifndef CPSCPRESENTITYGROUPMEMBERSPRESENCESUBSCRIPTIONITEM_H

#define CPSCPRESENTITYGROUPMEMBERSPRESENCESUBSCRIPTIONITEM_H

#include <e32base.h>

#include "presenceinfoimp.h"

#include "ximpsubscriptionitembase.h"

#include "groupcontenteventobserver.h"

class MXIMPItemParent;

class MXIMPPscContext;

class CPresenceInfoFilterImp;

class MXIMPIdentity;

class CXIMPIdentityImp;

class CGroupContentSubscriptionItem;

/**

 * PSC group list subscription implementation

 *

 * @since S60 v3.2

 */

class CPresentityGroupMembersPresenceSubscriptionItem : public CXIMPSubscriptionItemBase, 

                                                               public MGroupContentEventObserver

    {

public: // Construction and destruction

    /**

     * Construction

     * @param aParent. Parent has to be informed when this object is deleted by RemoveMe method.

     */

    static CPresentityGroupMembersPresenceSubscriptionItem* NewLC( MXIMPItemParentBase& aParent,

                                                                          CGroupContentSubscriptionItem& aContentItem );

    /**

     * Destruction

     * - Remember to inform parent about delete.

     */

    ~CPresentityGroupMembersPresenceSubscriptionItem();

private: // Construction and destruction

    /**

     * Construction

     * @param aParent. Parent has to be informed when this object is deleted by RemoveMe method.

     */

    CPresentityGroupMembersPresenceSubscriptionItem( MXIMPItemParentBase& aParent, 

                                                            CGroupContentSubscriptionItem& aContentItem );

    /**

     * Construction

     */

    void ConstructL();

public: // New methods

    /**

     * Current presence information filter.

     * @return Current presence information filter.

     */

    IMPORT_C CPresenceInfoFilterImp& SubscriptionPif();

    /**

     * Set current presence information filter. Overwrites existing one.

     * Ownership is transferred to callee.

     * @param aPif Current presence information filter.

     */

    IMPORT_C void SetSubscriptionPif( CPresenceInfoFilterImp* aPif );

    /**

     * Collect aggregated presence information filter without given context.

     * @param aContext. Exluded context from aggregated pif.

     * @return Aggregated pif without exluded context.

     */    

    IMPORT_C CPresenceInfoFilterImp* CollectSubscriptionPifWithoutCtxL( 

                                                    MXIMPPscContext* aContext );

    /**

     * Set presence information. Overwrites existing one.

     * @param aPresenceInfo. New presence information.

     */

    IMPORT_C void SetPresenceInfoL( CPresenceInfoImp* aPresenceInfo );

    /**

     * For ordering items.

     * @param aA Key item for ordering.

     * @param aB Item to compare

     * @return -1 if aB is greater than aA

     *          0 if they are same

     *          1 if aA if greater than aB.

     */    

    IMPORT_C static TInt Order( const CPresentityGroupMembersPresenceSubscriptionItem& aA,

                         const CPresentityGroupMembersPresenceSubscriptionItem& aB );

    /**

     * For ordering items using identity as key.

     * @param aA Key identity for ordering.

     * @param aB Item to compare

     * @return -1 if aB is greater than aA

     *          0 if they are same

     *          1 if aA if greater than aB.

     */    

    IMPORT_C static TInt IdentityOrder( const CXIMPIdentityImp* aA,

                         const CPresentityGroupMembersPresenceSubscriptionItem& aB );

    /**

     * Identity of item.

     * @return Identity of item.     

     */

    IMPORT_C const MXIMPIdentity& Identity() const;

    /**

     * Set identity for item

     * @param aIdentity. New identity for item. Ownership is transferred.

     */

    IMPORT_C void SetIdentity( CXIMPIdentityImp* aIdentity );

public: // From MXIMPSubscriptionItem

    /**

     * @see MXIMPSubscriptionItem

     */

    void SynthesiseSubscriptionEventToL( MXIMPPscContext* aContext, TBool aForceEvent );

    /**

     * @see MXIMPSubscriptionItem

     */

    void ActivateSubscriberL( MXIMPPscContext* aContext );

private: // From CXIMPSubscriptionItemBase

    /**

     * @see CXIMPSubscriptionItemBase

     */

    void CleanExpired();

public: // From CXIMPSubscriptionItemBase

    /**

     * @see CXIMPSubscriptionItemBase

     */

    IMPORT_C void AddSubscriberL( MXIMPPscContext* aContext );

    /**

     * @see CXIMPSubscriptionItemBase

     */

    IMPORT_C void RemoveSubscriber( MXIMPPscContext* aContext );    

private: // From MGroupContentSubscriptionEventObserver    

    /** 

     * @see MGroupContentSubscriptionEventObserver

     */

    void HandleChangeL( RPrGrpMemInfoImpArray& aAdded, RPrGrpMemInfoImpArray& aRemoved );

    /** 

     * @see MGroupContentSubscriptionEventObserver

     */

    void HandleSynthesiseL( RPrGrpMemInfoImpArray& aAdded );

private: // Data

    /**

     * Current presence information filter.

     */

    CPresenceInfoFilterImp* iPif;

    /**

     * Current presence info for item

     * Own

     */

    CPresenceInfoImp* iPresenceInfo;

    /**

     * Identity of item.

     * Own

     */

    CXIMPIdentityImp* iIdentity;

    /**

     * Owns reference to content item. Use close for delete.

     */

    CGroupContentSubscriptionItem& iContentItem;

    };

/* ======================================================================== */

#endif // CPSCPRESENTITYGROUPMEMBERSPRESENCESUBSCRIPTIONITEM_H