/*

* 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:  Notifier class for any change in Storage API dtabase.

*

*/

// System Includes

#include <centralrepository.h>

// User Includes

#include "evtdbnotifier.h"

#include "evtdebug.h"

// ================ Member funtions for CEvtDatabase class ==================

// ---------------------------------------------------------------------------

// CEvtDbNotifier::CEvtDbNotifier

// ---------------------------------------------------------------------------

//

CEvtDbNotifier::CEvtDbNotifier( MEvtDbObserver&    aObserver )

						:CActive( EPriorityStandard ),

						iDbObserver( aObserver )

    {

    }

// ---------------------------------------------------------------------------

// CEvtDbNotifier::~CEvtDbNotifier

// ---------------------------------------------------------------------------

//

CEvtDbNotifier::~CEvtDbNotifier()

    {

	Cancel();

    delete iRepository; 

    } 

// ---------------------------------------------------------------------------

// CEvtDbNotifier::NewL

// ---------------------------------------------------------------------------

//

CEvtDbNotifier* CEvtDbNotifier::NewL( MEvtDbObserver&    aObserver )

    {

	CEvtDbNotifier* self = NewLC( aObserver );

	CleanupStack::Pop( self );

	return self;

    }

// ---------------------------------------------------------------------------

// CEvtDbNotifier::NewLC

// ---------------------------------------------------------------------------

//

CEvtDbNotifier* CEvtDbNotifier::NewLC( MEvtDbObserver&    aObserver )

    {

	CEvtDbNotifier* self = new ( ELeave )CEvtDbNotifier( aObserver );

	CleanupStack::PushL( self );

	self->ConstructL( );

	return self;

    } 

// ---------------------------------------------------------------------------

// CEvtDbNotifier::ConstructL

// ---------------------------------------------------------------------------

//

void CEvtDbNotifier::ConstructL()

    {

	EVTUIDEBUG( "+ CEvtDbNotifier::ConstructL()" );

    CActiveScheduler::Add(this);

	EVTUIDEBUG( "Calling CRepository::NewL" );

    // Create the Central repository object notifying the Db change

    TRAPD(err, iRepository = CRepository::NewL( TUid::Uid( KCRUidEvtStorageDb ) ) );

	EVTUIDEBUG1( "Calling CRepository::NewL Cenrep Error Code- %d", err );

	User::LeaveIfError( err );

    // Request for notification

    StartNotification();

	EVTUIDEBUG( "- CEvtDbNotifier::ConstructL()" );

    } 

// ---------------------------------------------------------------------------

// void CEvtDbNotifier::RunL()

// ---------------------------------------------------------------------------

//                             

void CEvtDbNotifier::RunL()

    {

	EVTUIDEBUG( "+ CEvtDbNotifier::RunL()" );

    // resubscribe before processing new value to prevent missing updates

	StartNotification();

	// processing new value

	HandleDbChangedL();

	EVTUIDEBUG( "- CEvtDbNotifier::RunL()" );

    }

// ---------------------------------------------------------------------------

// void CEvtDbNotifier::DoCancel()

// ---------------------------------------------------------------------------

// 

void CEvtDbNotifier::DoCancel()

    {

	EVTUIDEBUG( "+ CEvtDbNotifier::DoCancel()" );

    // Cancel the outstanding CR notification request

    if( iRepository )

        {

        iRepository->NotifyCancel( KEvtDbChangeType );        

        }

	EVTUIDEBUG( "- CEvtDbNotifier::DoCancel()" );

    }

// ---------------------------------------------------------------------------

// TInt CEvtDbNotifier::RunError()

// ---------------------------------------------------------------------------

//    

TInt CEvtDbNotifier::RunError( TInt aError )

	{    	

	return CActive::RunError( aError );	

	} 

// ---------------------------------------------------------------------------

// void CEvtDbNotifier::StartNotification()

// ---------------------------------------------------------------------------

//  

void CEvtDbNotifier::StartNotification()

    {

	EVTUIDEBUG( "+ CEvtDbNotifier::StartNotification()" );

    if( !IsActive() )

        {

        iStatus = KRequestPending;

        // Request for notification

    	iRepository->NotifyRequest( KEvtDbChangeType, iStatus );

        SetActive();          

        }  

	EVTUIDEBUG( "- CEvtDbNotifier::StartNotification()" );

    }

// ---------------------------------------------------------------------------

// CEvtDbNotifier::HandleDbChangedL

// ---------------------------------------------------------------------------

//

void CEvtDbNotifier::HandleDbChangedL( )

    {    

	EVTUIDEBUG( "+ CEvtDbNotifier::HandleDbChangedL()" );

    // Notify the Observer for the database change type

    iDbObserver.HandleDbChangedL( );

	EVTUIDEBUG( "- CEvtDbNotifier::HandleDbChangedL()" );

    }

// ---------------------------------------------------------------------------

// CEvtDbNotifier::DbChangedL

// ---------------------------------------------------------------------------

//

void CEvtDbNotifier::DbChangedL( )

    {

	EVTUIDEBUG( "+ CEvtDbNotifier::DbChangedL()" );

    // Get the type of database change from Cenrep key

    TInt flag = 0;

    User::LeaveIfError( iRepository->Get( KEvtDbChangeType, flag ) );  

    EVTUIDEBUG1( "In DbChangedL Get %d", flag );

    flag = ( flag == 0 ) ? 1 : 0;

    EVTUIDEBUG1( "In DbChangedL Set %d", flag );

    // Set the KEvtDbChangeType key of the Cenrep, So that other database

    // connection can get the notifications

    User::LeaveIfError( iRepository->Set( KEvtDbChangeType, flag ) );

	EVTUIDEBUG( "- CEvtDbNotifier::DbChangedL()" );

    }

// End of File