/*

* 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:  Store object for single buddy in a service

*

*/

#ifndef CPPRESENCECACHEBUDDYSTORE_H

#define CPPRESENCECACHEBUDDYSTORE_H

#include <e32base.h>

class MPresenceBuddyInfo2;

class CPresenceCacheSession;

class CPresenceCacheServiceStore;

/**

 * CPresenceCacheBuddyStore. Used in Presence cache for presence storage. The 

 * identity part is always exists in this class, subscribers and presence info

 * are not guaranteed. However, if this object doesn't contain any subscribers 

 * or presence info, it doesnt serve its purpose and should be deleted.

 *

 * @lib presencecacheserver.exe

 * @since S60 v3.2

 */

class CPresenceCacheBuddyStore: public CBase

    {

public:

    /**

     * Symbian constructors and c++ destructor

     *

     * @param aServiceStore a parent store for this object

     * @param aIdentity identity for this object, must be in xsp format

     */

    IMPORT_C static CPresenceCacheBuddyStore* NewLC(

                                    CPresenceCacheServiceStore* aServiceStore,

                                    const TDesC& aIdentity);

    IMPORT_C static CPresenceCacheBuddyStore* NewL(

                                    CPresenceCacheServiceStore* aServiceStore,

                                    const TDesC& aIdentity);

    virtual ~CPresenceCacheBuddyStore();

private:

    /**

     * c++ constructor

     *

     * @param aServiceStore Parent service store for this object

     */

    CPresenceCacheBuddyStore(CPresenceCacheServiceStore* aServiceStore);

    /**

     * Symbian second phase constructor

     * @param aIdentity, uses this identity if not NULL, otherwise creates new

     */

    void ConstructL(const TDesC& aIdentity);

public: 

    /**

    * Service name of this object, taken from xsp prefix of the indentity

    *

    * @return TPtrC service name of this object

    */

    TPtrC ServiceName() const;

    /**

    * Sets the presnece info to this object. Takes ownership. It deletes

    * any old presence info. Calling this function multiple times with

    * different presence infos doesnt harm.

    *

    * @param aPresBuddyInfo buddy presence info to be set to this object

    */

    void SetPresenceBuddyInfo(MPresenceBuddyInfo2* aPresBuddyInfo);

    /**

    * Removes presence info from this object and set it to NULL.

    */

    void RemovePresenceBuddyInfo();

    /**

    * Get the subscribed sessions pointer array. The array contains all those

    * sessions which are currently subscribed to receive changes in this object.

    *

    * @return reference to RPointerArray<CPresenceCacheSession>

    */

    RPointerArray<CPresenceCacheSession>& GetSubscribedSessions();

    /**

    * Add session to the list of subscribed sessions. It does not take ownership.

    * ignores if session is already there.

    *

    * @param aSession to add in subscribed list

    */

    void AddSubscribedSession(CPresenceCacheSession* aSession);

    /**

    * Remove session to the list of subscribed sessions. It does not take ownership.

    * ignores if session is not found.

    *

    * @param aSession to remove from subscribed list

    */

    void RemoveSubscribedSession(CPresenceCacheSession* aSession);

    /**

    * TODO: Allocates new momery? Or takes ownership?

    * Sets the identity to this object. Takes ownership. It deletes

    * any old identity if present. Identity must be in xsp format.

    *

    * @param aIdentity identity to be set to this object

    */

    void SetBuddyIdL(const TDesC& aIdentity);

    /**

    * Gets presence info from this object.

    *

    * @return pointer to MPresenceBuddyInfo2

    */

    MPresenceBuddyInfo2* PresenceBuddyInfo() const;

    /**

    * Gets identity from this object.

    *

    * @return identity

    */

    TPtrC BuddyId() const;

    /**

    * Matches this object's identity with that of given object. Return True if

    * matches.

    *

    * @param aOtherInstance other CPresenceCacheBuddyStore

    * @return ETrue if identity matches.

    */

    TBool EqualsIdentity(

                    const CPresenceCacheBuddyStore* aOtherInstance ) const;

    /**

    * Matches this object's identity with that of given object. Return True if

    * matches.

    *

    * @param aOtherInstance MPresenceBuddyInfo2 object

    * @return ETrue if identity matches.

    */

    TBool EqualsIdentity(

                        const MPresenceBuddyInfo2* aOtherInstance ) const;

    /**

    * Matches this object's identity with that of given identity. Return True if

    * matches.

    *

    * @param aOtherIdentity other identity object

    * @return ETrue if identity matches.

    */

    TBool EqualsIdentity(

                            const TDesC& aOtherIdentity ) const;

    /**

    * Finds whether this object has any presence info.

    *

    * @return ETrue if this object contains any presence info.

    */

    TBool HasPresence() const;

    /**

    * Finds whether this object has any subscribers.

    *

    * @return ETrue if this object has any subscriber(s).

    */

    TBool HasSubscribers() const;          

private: // data

     /**

     * OWN: Contains presence info or NULL

     */

    MPresenceBuddyInfo2* iPresenceBuddyInfo;

    /**

     * OWN: identity

     */

    HBufC* iIdentity;

    /**

    *OWN: Sessions which  are subscribed to receive change in this buddy's presence

    */

    RPointerArray<CPresenceCacheSession> iSubscribedSessions;

    /**

    *Not Owned: Pointer to this object's service store

    */

    CPresenceCacheServiceStore* iServiceStore;

    };

#endif // CPPRESENCECACHEBUDDYSTORE_H