/*

* 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 "cusbvbusobserver.h"

#include "definitions.h"

#include "debug.h"

#include "panic.h"

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

// 

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

//

CUsbVBusObserver::CUsbVBusObserver() :

    CActive(EPriorityStandard)

    {

    CActiveScheduler::Add(this);

    }

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

// 

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

//

void CUsbVBusObserver::ConstructL()

    {

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

    User::LeaveIfError(iVBus.Attach(KUidUsbManCategory,

            KUsbOtgVBusPoweredProperty));

    }

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

// 

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

//

CUsbVBusObserver* CUsbVBusObserver::NewL()

    {

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

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

    CleanupStack::PushL(self);

    self->ConstructL();

    CleanupStack::Pop(self);

    return self;

    }

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

// 

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

//

CUsbVBusObserver::~CUsbVBusObserver()

    {

        FLOG( _L( "[USBOTGWATCHER]\tCUsbVBusObserver::~CUsbVBusObserver" ) );

    Cancel();

    iVBus.Close();

    iObservers.Close();

    }

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

// 

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

//

CUsbVBusObserver::TState CUsbVBusObserver::VBus() /* not const, because for some reason RProperty::Get is not const! */

    {

        FLOG( _L( "[USBOTGWATCHER]\tCUsbVBusObserver::VBus" ) );

    TInt val(0);

    TInt err = iVBus.Get(val);

    if (KErrNone != err)

        {

            FLOG( _L( "[USBOTGWATCHER]\tCUsbVBusObserver::VBus CanNotGetVBusProperty" ) );

        Panic(ECanNotGetVBusProperty);

        }

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

    // not found in docs clear definition of this property. Verification is needed   

    return (0 == val ? EVBusDown : EVBusUp);

    }

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

// 

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

//

void CUsbVBusObserver::SubscribeL(MUsbVBusObserver* aObserver)

    {

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

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

    FLOG( _L( "[USBOTGWATCHER]\tCUsbVBusObserver::SubscribeL Observer appended." ) );

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

        {

        iVBus.Subscribe(iStatus);

        SetActive();

        }

    }

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

// 

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

//

void CUsbVBusObserver::UnsubscribeL(MUsbVBusObserver* aObserver)

    {

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

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

        {

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

        return;

        }

    TInt i(0);

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

        {

        ++i;

        FTRACE( FPrint(_L( "[USBOTGWATCHER]\tCUsbVBusObserver::UnsubscribeL i = %d" ), i ));

        }

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

        {

        FLOG( _L( "[USBOTGWATCHER]\tCUsbVBusObserver::UnsubscribeL Removing item" ) );

        iObservers.Remove(i);

        }

    else

        {

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

        Panic(ECanNotFindVBusObserver);

        }

    if (0 == iObservers.Count()) // no observers anymore

        {

        // cancel pending request, if any

        Cancel();

        return;

        }

    }

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

//

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

//

void CUsbVBusObserver::RunL()

    {

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

        // if error occured, tell to Observers

        if(KErrNone != iStatus.Int()) 

            {

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

                 {

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

                 }

            return;

            }

    // re-issue request first

    iVBus.Subscribe(iStatus);

    SetActive();

    // then process property change

    TState state(VBus());

    // report change   

    switch (state)

        {

        case EVBusUp:

            {

                FLOG(_L( "[USBOTGWATCHER]\tCUsbVBusObserver::RunL VBus UP"));

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

                {

                iObservers[i]->VBusUpL();

                }

            break;

            }

            ;

        case EVBusDown:

            {

                FLOG(_L( "[USBOTGWATCHER]\tCUsbVBusObserver::RunL VBus DOWN"));

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

                {

                iObservers[i]->VBusDownL();

                }

            break;

            }

            ;

        default:

            {

            Panic(EWrongVBusState);

            }

        }

    }

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

// 

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

//

void CUsbVBusObserver::DoCancel()

    {

    iVBus.Cancel();

    }

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

// 

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

//

TInt CUsbVBusObserver::RunError(TInt aError)

    {

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

    // try to continue	

    return KErrNone;

    }