/*

* Copyright (c) 2007-2008 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:  Provides implementation class for CCallInformation -class.

*

*/

#ifndef CCALLINFORMATIONIMPL_H_

#define CCALLINFORMATIONIMPL_H_

#include <e32base.h>

#include "mcall.h"

// forward declarations 

class MCallInformationObserver;

class CCallInfoIter;

class CCallInfos;

/**

 *  This class provides implementation for CCallInformation -class.  

 * 

 *  @lib telephonyservice.lib

 *  @since S60 v5.1

 */

NONSHARABLE_CLASS( CCallInformationImpl ) : public CBase                                      

    {

public:

    /**

    * Two-phased constructor.         

    */

    static CCallInformationImpl* NewL();

    /**

    * Destructor.

    */

    virtual ~CCallInformationImpl();

    /**

    * Sets the observer for changes in current calls.

    *

    * @since S60 v5.1 

    * @param aObserver Observer for notifications.

    */

    void NotifyCallInformationChanges( MCallInformationObserver& aObserver );

    /**

    * Used to cancel previously placed NotifyCallInformationChanges call.

    *

    * @since S60 v5.1      

    */

    void CancelNotification();

    /**

    * Gets the snapshot of ongoing calls.

    *

    * @since S60 v5.1      

    * @return Ongoing calls.

    */

    CCallInfoIter& GetCallsL(); 

    /**

     * Returns information whether call in given state exist.

     * 

     * @since S60 v5.2

     * @param aState Specifies a call state that is used as a search key.

     * @return ETrue if call in given state exist.

     */

    TBool IsCallInState( CCPCall::TCallState aState ) const;

protected:

    CCallInformationImpl();

protected: //data 

    /**

     * Observer to be notified when call information changes

     * Not own.  

     */

    MCallInformationObserver* iObserver;   

private: // data    

    CCallInfos*       iInfos;    

    CCallInfos*       iInfosInState;

    CCallInfoIter*    iCallIter;    

    CCallInfoIter*    iCallStateIter;

    };

#endif /*CCALLINFORMATIONIMPL_H_*/