/*

 * Copyright (c) 2008-2009 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: Listens central repository for offline mode changes.

 *

 */

#include <e32base.h>

#include <centralrepository.h>

#include <CoreApplicationUIsSDKCRKeys.h>

#include <featmgr.h>

#include "mpmlogger.h"

#include "mpmserver.h"

#include "mpmofflinewatcher.h"

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

// Default C++ constructor.

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

//

CMpmOfflineWatcher::CMpmOfflineWatcher( CMPMServer* aServer ) :

    CActive( EPriorityStandard ), iServer( aServer )

    {

    MPMLOGSTRING( "CMpmOfflineWatcher::CMpmOfflineWatcher" )

    CActiveScheduler::Add( this );

    }

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

// Symbian 2nd phase constructor. Creates a central repository object.

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

//

void CMpmOfflineWatcher::ConstructL()

    {

    MPMLOGSTRING( "CMpmOfflineWatcher::ConstructL" )

    FeatureManager::InitializeLibL();

    // If feature isn't supported, then no watching, but return in StartL().

    iOfflineFeatureSupported = FeatureManager::FeatureSupported( 

                               KFeatureIdOfflineMode );

    FeatureManager::UnInitializeLib();

    iRepository = CRepository::NewL( KCRUidCoreApplicationUIs );

    }

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

// Creates a new object by calling the two-phased constructor.

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

//

CMpmOfflineWatcher* CMpmOfflineWatcher::NewL( CMPMServer* aServer )

    {

    MPMLOGSTRING( "CMpmOfflineWatcher::NewL" )

    CMpmOfflineWatcher* self = new( ELeave ) CMpmOfflineWatcher( aServer );

    CleanupStack::PushL( self );

    self->ConstructL();

    CleanupStack::Pop( self );

    return self;

    }

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

// Destructor.

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

//

CMpmOfflineWatcher::~CMpmOfflineWatcher()

    {

    MPMLOGSTRING( "CMpmOfflineWatcher::~CMpmOfflineWatcher" )

    Cancel();

    delete iRepository;

    }

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

// Order notification from changes.

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

//

void CMpmOfflineWatcher::StartL()

    {

    MPMLOGSTRING( "CMpmOfflineWatcher::StartL" )

    if ( !iOfflineFeatureSupported )

        {

        return;

        }

    // Get the initial data usage value from repository.

    User::LeaveIfError( GetCurrentOfflineValue() );

    iServer->UpdateOfflineMode( iOfflineMode );

    // Request notifications.

    User::LeaveIfError( RequestNotifications() );

    }

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

// From class CActive.

// Event is received when there is a change in central repository key.

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

//

void CMpmOfflineWatcher::RunL()

    {

    MPMLOGSTRING( "CMpmOfflineWatcher::RunL" )

    if ( iStatus.Int() < KErrNone )

        {

        MPMLOGSTRING2("Status: 0x%08X", iStatus.Int())

        iErrorCounter++;

        if ( iErrorCounter > KMpmOfflineWatcherCenRepErrorThreshold )

            {

            MPMLOGSTRING2("Over %d consecutive errors, stopping notifications permanently.",

                    KMpmOfflineWatcherCenRepErrorThreshold)

            return;

            }

        // Else: Error occured but counter not expired. Proceed.

        }

    else

        {

        // Notification is received ok => Reset the counter.

        iErrorCounter = 0;

        // Check if mode has changed (it should).

        TInt oldMode = iOfflineMode;

        TInt err = GetCurrentOfflineValue();

        if ( err == KErrNone && oldMode != iOfflineMode )

            {

            iServer->UpdateOfflineMode( iOfflineMode );

            }

        }

    RequestNotifications();

    }

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

// From class CActive.

// Cancel the outstanding request.

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

//

void CMpmOfflineWatcher::DoCancel()

    {

    MPMLOGSTRING( "CMpmOfflineWatcher::DoCancel" )

    iRepository->NotifyCancel( KCoreAppUIsNetworkConnectionAllowed );

    }

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

// Request for notifications.

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

//

TInt CMpmOfflineWatcher::RequestNotifications()

    {

    MPMLOGSTRING( "CMpmOfflineWatcher::RequestNotifications" )

    TInt err = iRepository->NotifyRequest( KCoreAppUIsNetworkConnectionAllowed, iStatus );

    if ( err == KErrNone )

        {

        SetActive();

        }

    else

        {

        // MPM's offline mode watching wouldn't recover... 

        MPMLOGSTRING2( "CMpmOfflineWatcher::RequestNotifications, ERROR: %d", err )

        }

    return err;

    }

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

// Get the current repository key value.

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

//

TInt CMpmOfflineWatcher::GetCurrentOfflineValue()

    {

    MPMLOGSTRING( "CMpmOfflineWatcher::GetCurrentOfflineValue" )

    TInt err = iRepository->Get( KCoreAppUIsNetworkConnectionAllowed, iOfflineMode );

    if ( err != KErrNone )

        {

        MPMLOGSTRING2( "CMpmOfflineWatcher::GetCurrentOfflineValue, ERROR: %d", err )

        }

    return err;

    }