/*

* Copyright (c) 2009 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:

*

*/

#ifndef CRADIOSYSTEMEVENTDETECTOR_H

#define CRADIOSYSTEMEVENTDETECTOR_H

#include <e32base.h>

#include "cradiopropertyobserver.h"

class MRadioSystemEventDetectorObserver;

/**

* Catches notification of the call and network state changes.

*

* Class provides implementation to detect system events and notify UI components of the event,

* Class keeps several instances of CVPropertyObserver, and those instances send event notifications

* about the particular system component state change.

*/

NONSHARABLE_CLASS( CRadioSystemEventDetector ) : public CBase

                                               , public MRadioPropertyChangeObserver

    {

public:

    static CRadioSystemEventDetector* NewL( MRadioSystemEventDetectorObserver&  aObserver );

    virtual ~CRadioSystemEventDetector();

    /**

     * Returns network coverage state ( wlan or mobile ).

     */

    TBool IsNetworkCoverage() const;

    /**

     * Returns mobile network coverage state.

     */

    TBool IsMobileNetworkCoverage() const;

    /**

     * Returns current call state.

     */

    TBool IsCallActive() const;

    /**

     * Returns current audio resources state.

     * @return audio resources state

     */

    TBool IsAudioResourcesAvailable() const;

    /**

     * Returns current Voice UI state.

     * @return ETrue if Voice UI is active, EFalse otherwise

     */

    TBool IsVoiceUiActive() const;

protected:

// from base class MRadioPropertyChangeObserver

    void HandlePropertyChangeL( const TUid& aCategory, const TUint aKey, const TInt aValue );

    void HandlePropertyChangeL( const TUid& aCategory, const TUint aKey, const TDesC8& aValue );

    void HandlePropertyChangeL( const TUid& aCategory, const TUint aKey, const TDesC& aValue );

    void HandlePropertyChangeErrorL( const TUid& aCategory, const TUint aKey, TInt aError );

private:

    void ConstructL();

    /**

     * Used internally to change network coverage status and report it to observer.

     */

    void SetNetworkCoverageL( const TBool aIsMobileNetworkCoverage, const TBool aIsWlanCoverage );

    CRadioSystemEventDetector( MRadioSystemEventDetectorObserver&  aObserver );

private: // data

    /** Observer which will be notified of the call and network state changes*/

    MRadioSystemEventDetectorObserver&  iObserver;

    /** handler to Publish & Subscribe interface*/

    CRadioPropertyObserver*    iCallStatusObserver;

    /** handler to Publish & Subscribe interface*/

    CRadioPropertyObserver*    iNetworkStatusObserver;

    /** handler to Publish & Subscribe interface*/

    CRadioPropertyObserver*    iVoiceUiObserver;

    /** handler to Publish & Subscribe interface*/

    CRadioPropertyObserver*    iAudioPolicyObserver;

    /**Indicator for the mobile network status*/

    TBool iIsMobileNetworkCoverage;

    /**Indicator for the wlan network status*/

    TBool iIsWlanCoverage;

    /**Indicator for the call status*/

    TBool iIsCallActive;

    /** Array of audio policy categories that VR must not resume after. */

    RArray<TInt> iNoAutoResumeAudioCategories;

    /** Indicator for audio resource status. */

    TBool iIsAudioResourcesAvailable;

    /** Indicator for Voice UI status. */

    TBool iIsVoiceUiActive;

    };

#endif // CRADIOSYSTEMEVENTDETECTOR_H