/*

* Copyright (c) 2007 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:  CCCHCommDbWatcher declaration

*

*/

#ifndef C_CCHCOMMDBWATCHER_H

#define C_CCHCOMMDBWATCHER_H

// INCLUDES

#include <e32std.h>

#include <e32base.h>

#include <commdb.h>

#include <cmmanager.h>

#include <commsdattypesv1_1.h>

// CONSTANTS

// Stop requesting new notifications after this many consecutive errors

const TInt KCchConnCenRepErrorThreshold = 80;

// MACROS

// None

// DATA TYPES

class TDestinationData

	{

	public:

	inline TDestinationData(): iDestId(0), iIapCount(0), iWlanIaps(0){}

	inline TDestinationData(TInt aDestId, TInt aIapCount):

		iDestId(aDestId), iIapCount(aIapCount), iWlanIaps(0){}

	TInt iDestId;	//CMM Destination ID

	TInt iIapCount; //Number of IAPs under this destination

	TInt iWlanIaps; //Number of WLAN IAPs under this destination

	};

// FUNCTION PROTOTYPES

// None

// FORWARD DECLARATIONS

class MCCHCommDbWatcherObserver;

class CRepository;

// CLASS DECLARATION

/**

 *  CCCHCommDbWatcher declaration

 *  Handles CommsDb changes and notifies CCHServiceHandler at IAP count changes

 *  @lib cchserver.exe

 *  @since S60 3.2

 */

NONSHARABLE_CLASS( CCCHCommDbWatcher ) : public CActive

    {

public: // Constructors and destructor

    static CCCHCommDbWatcher* NewL( MCCHCommDbWatcherObserver& aObserver );

    static CCCHCommDbWatcher* NewLC( MCCHCommDbWatcherObserver& aObserver );

    ~CCCHCommDbWatcher();

public: // new functions

    /**

     * Returns number of IAPs that have WLAN bearer type

     * @param aSNAPId ID of SNAP to check. Use value KErrNotFound 

     *        to get number of WLAN IAPS without SNAP binding

     * @param aWLANIapsOnly if ETrue, returns WLAN iap count in given SNAP

     * @param aUpdateDestinations if ETrue, update destination before checking  

     * @return number of IAPs in given SNAP. KErrNotFound if no IAPS

     * @since Series 60 3.2

     */

    TInt GetIapCountFromSnap( TInt aSNAPId, TBool aWLANIapsOnly, TBool aUpdateDestinations = EFalse );

    /**

     * Checks is IAP's bearer type WLAN AP.

     * @param aIapId of IAP to check.

     * @return ETrue if given IAP id is WLAN AP, otherwise EFalse.

     * @since Series 60 3.2

     */

    TBool IsWlanApL( TInt aIapId );

	/**

     * Checks is IAP's bearer type VPN AP.

     * @param aIapId of IAP to check.

     * @return ETrue if given IAP id is VPN AP, otherwise EFalse.

     */

    TBool IsVpnApL( TInt aIapId );

	/**

     * IAP's bearer getter.

     * @param aIapId.

     * @return TUint32 bearer type.

     */

    TUint32 GetBearerL( TInt aIapId );

	/**

     * Removes IAPs which are not linked to VPN AP.

     * @param aIapIds all connected iaps, afterward only linked IAPs.

	 * @param aIAPId VPN IAP to check.

     */

    void RemoveOtherThanVpnIapsL( RArray<TUint>& aIaps, TUint aIAPId );

protected: // From base classes

    /**

     * From CActive

     * @since Series 60 3.2

     */

    void RunL();

    /**

     * From CActive

     * @since Series 60 3.2

     */

    TInt RunError( TInt aError ); 

    /**

     * From CActive

     * @since Series 60 3.2

     */

    void DoCancel();

private:

    /**

     * C++ default constructor.

     */

    CCCHCommDbWatcher( MCCHCommDbWatcherObserver& aObserver );

    /**

     * By default Symbian 2nd phase constructor is private.

     */

    void ConstructL();

    /*

     * Request notifications of cenrep changes

	 * @return KErrNone if succesful

     */

    TInt RequestNotifications();

    /**

     * Check changes in IAPs / SNAP configurations

     * @param aChanged will be ETrue if there has been changes to 

     *  either total WLAN AP count or SNAP/IAP configuration

     * @param aSNAPId will contain ID of the changed SNAP that 

     *  contains now more WLAN Iaps

     */

    void CheckIapsL( TBool& aChanged, TInt& aSNAPId );

	/**

	 * Count number of Iaps in an array of TDestinationData.

	 * Helper function to detect new iap additions

	 * @param aArray Array to count from

	 * @return total number of IAPs from the given destinations array

     * @since S60 3.2

	 */

    TInt CountIapsFromArray( RArray<TDestinationData>& aArray ) const;

	/**

	 * Updates internal iDestinations store after a SNAP configuration change.

     * Determines also the SNAP where WLAN iap(s) were added.

	 * @param aDestinations current Snap configuration attained from cmmanager

     * @param aChanged will be ETrue if there is a new WLAN iap

     * @param aSNAPId holds the SNAP id of the added WLAN iap

     * @since S60 3.2

	 */

    void UpdateDestinationStore( RArray<TDestinationData>& aDestinations,

        TBool& aChanged,

        TInt& aSNAPId);

    /**

     * Updates IAPs / SNAPs configurations and notifies our client if 

     * there is some changes.

     * @return TInt general symbian error code.

     */

    TInt UpdateIapTable();

    /**

     * Open connection to cmmanager 

     * @return RCmManager reference to cmmanager

     */

    RCmManager& CmManagerL();

    /**

     * Initializes destinations. 

     */

    void InitializeDestination();

private: // data

	///not own: observer to notify when there are changes in WLAN IAP/SNAPs

	MCCHCommDbWatcherObserver& iObserver;

	///own: Commsdb access to get notifications about changes

    CCommsDatabase*				iCommDb;

    // Central repository to get notifications of commsdat changes

    CRepository* iRepository;

    // Table id for iap table

    TUint32 iTableId;

	///own: array holding information about iap count per destination

	//      index 0 will contain count of iaps not bound to any

	//      destination

	RArray<TDestinationData>   iDestinations;

	//own, connectionmethodmanager

	RCmManager				   iCmm;

	// indicates is cmmanager open

	TBool                      iCmmOpen;

	// Holds the last cmmanager error

	TInt                       iLastError;

	// Error counter for cenrep notification request errors

	TInt                       iErrorCounter;

	// Indicates do we have to use force when asking snap's iap

	TBool                      iUseForce;

    };

#endif // C_CCHCOMMDBWATCHER_H

// End of file