/*

* 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:  Implementation

 *

*/

#include <usbotgdefs.h>

#include "cusbbusactivityobserver.h"

#include "definitions.h"

#include "debug.h"

#include "panic.h"

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// 

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//

CUsbBusActivityObserver::CUsbBusActivityObserver() :

    CActive(EPriorityStandard)

    {

    CActiveScheduler::Add(this);

    }

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// 

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

//

void CUsbBusActivityObserver::ConstructL()

    {

        FLOG( _L( "[USBOTGWATCHER]\tCUsbBusActivityObserver::ConstructL" ) );

    User::LeaveIfError(iBusActivity.Attach(KUidUsbManCategory,

            KUsbOtgConnectionIdleProperty));

    }

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// 

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//

CUsbBusActivityObserver* CUsbBusActivityObserver::NewL()

    {

        FLOG( _L( "[USBOTGWATCHER]\tCUsbBusActivityObserver::NewL" ) );

    CUsbBusActivityObserver* self = new (ELeave) CUsbBusActivityObserver();

    CleanupStack::PushL(self);

    self->ConstructL();

    CleanupStack::Pop(self);

    return self;

    }

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// 

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//

CUsbBusActivityObserver::~CUsbBusActivityObserver()

    {

        FLOG( _L( "[USBOTGWATCHER]\tCUsbBusActivityObserver::~CUsbBusActivityObserver" ) );

    Cancel();

    iBusActivity.Close();

    iObservers.Close();

    }

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// 

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//

CUsbBusActivityObserver::TBusActivity CUsbBusActivityObserver::BusActivity()

    {

        FLOG( _L( "[USBOTGWATCHER]\tCUsbBusActivityObserver::BusActivity" ) );

    TInt val(0);

    TInt err = iBusActivity.Get(val);

    if (KErrNone != err)

        {

            FLOG( _L( "[USBOTGWATCHER]\tCUsbBusActivityObserver::BusActivity CanNotGetBusActivityProperty" ) );

        Panic(ECanNotGetBusActivityProperty);

        }

        FTRACE( FPrint(_L( "[USBOTGWATCHER]\tCUsbBusActivityObserver::State = %d" ), val ));

    return (0 == val ? EBusActive : EBusIdle);

    }

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// 

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//

void CUsbBusActivityObserver::SubscribeL(MUsbBusActivityObserver* aObserver)

    {

        FLOG( _L( "[USBOTGWATCHER]\tCUsbBusActivityObserver::SubscribeL" ) );

    User::LeaveIfError(iObservers.Append(aObserver));

    if (KFirst == iObservers.Count()) // first item

        {

        iBusActivity.Subscribe(iStatus);

        SetActive();

        }

    }

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// 

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//

void CUsbBusActivityObserver::UnsubscribeL(MUsbBusActivityObserver* aObserver)

    {

        FLOG( _L( "[USBOTGWATCHER]\tCUsbBusActivityObserver::UnsubscribeL" ) );

    if (0 == iObservers.Count()) // no items

        {

        FLOG( _L( "[USBOTGWATCHER]\tCUsbBusActivityObserver::UnsubscribeL No observers" ) );

        return;

        }

    TInt i(0);

    while (i < iObservers.Count() && aObserver != iObservers[i])

        ++i;

    if (aObserver == iObservers[i]) // found

        {

        iObservers.Remove(i);

        }

    else

        {

            FLOG( _L( "[USBOTGWATCHER]\tCUsbBusActivityObserver::UnsubscribeL CanNotFindBusActivityObserver " ) );

        Panic(ECanNotFindBusActivityObserver);

        }

    if (0 == iObservers.Count()) // no items

        {

        // cancel pending request

        Cancel();

        }

    }

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

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

//

void CUsbBusActivityObserver::RunL()

    {

        FTRACE( FPrint(_L( "[USBOTGWATCHER]\tCUsbBusActivityObserver::RunL iStatus = %d" ), iStatus.Int()));

    // if error occured, inform observers

    if(KErrNone != iStatus.Int())

        {

        for (TInt i(0); i < iObservers.Count(); ++i)

                    {

                    iObservers[i]->BusActivityErrorL(iStatus.Int());

                    }

        }

    // re-issue request first

    iBusActivity.Subscribe(iStatus);

    SetActive();

    // then process property change

    TBusActivity state(BusActivity());

    switch (state)

        {

        case EBusIdle:

            {

                FLOG( _L( "[USBOTGWATCHER]\tCUsbBusActivityObserver::RunL BusIdle" ) );

            for (TInt i(0); i < iObservers.Count(); ++i)

                {

                iObservers[i]->BusIdleL();

                }

            break;

            }

        case EBusActive:

            {

                FLOG( _L( "[USBOTGWATCHER]\tCUsbBusActivityObserver::RunL BusActive" ) );

            for (TInt i(0); i < iObservers.Count(); ++i)

                {

                iObservers[i]->BusActiveL();

                }

            break;

            }

        default:

            {

                FLOG( _L( "[USBOTGWATCHER]\tCUsbBusActivityObserver::RunL BusActive WrongBusState" ) );

            Panic(EWrongBusState);

            }

        }

    }

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// 

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//

void CUsbBusActivityObserver::DoCancel()

    {

    iBusActivity.Cancel();

    }

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// 

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

//

TInt CUsbBusActivityObserver::RunError(TInt aError)

    {

    FTRACE( FPrint(_L( "[USBOTGWATCHER]\tCUsbBusActivityObserver::RunError aError = %d" ), aError));

    // try to continue	

    return KErrNone;

    }