/*

 * 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:  Implementation

 *

 */

#include <usbotgdefs.h>

#include "cusbbusactivityobserver.h"

#include "definitions.h"

#include "debug.h"

#include "panic.h"

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

// 

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

//

CUsbBusActivityObserver::CUsbBusActivityObserver() :

    CActive(EPriorityStandard)

    {

    CActiveScheduler::Add(this);

    }

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

// 

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

//

void CUsbBusActivityObserver::ConstructL()

    {

    LOG_FUNC

    LEAVEIFERROR(iBusActivity.Attach(KUidUsbManCategory,

            KUsbOtgConnectionIdleProperty));

    }

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

// 

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

//

CUsbBusActivityObserver* CUsbBusActivityObserver::NewL()

    {

    LOG_FUNC

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

    CleanupStack::PushL(self);

    self->ConstructL();

    CleanupStack::Pop(self);

    return self;

    }

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

// 

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

//

CUsbBusActivityObserver::~CUsbBusActivityObserver()

    {

    LOG_FUNC

    Cancel();

    iBusActivity.Close();

    iObservers.Close();

    }

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

// 

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

//

CUsbBusActivityObserver::TBusActivity CUsbBusActivityObserver::BusActivity()

    {

    TInt val(0);

    TInt err = iBusActivity.Get(val);

    if (KErrNone != err)

        {

        LOG("ECanNotGetBusActivityProperty" );

        PANIC( ECanNotGetBusActivityProperty);

        }

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

    }

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

// 

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

//

void CUsbBusActivityObserver::SubscribeL(MUsbBusActivityObserver& aObserver)

    {

    LOG_FUNC

    // check if the same observer already exist in a list

    if (KErrNotFound != iObservers.Find(&aObserver))

        {

        LOG( "Observer already exists" );

        PANIC( EObserverAlreadyExists);

        return;

        }

    iObservers.AppendL(&aObserver);

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

        {

        iBusActivity.Subscribe(iStatus);

        SetActive();

        }

    }

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

// 

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

//

void CUsbBusActivityObserver::UnsubscribeL(MUsbBusActivityObserver& aObserver)

    {

    LOG_FUNC

    TInt i(iObservers.Find(&aObserver));

    if (KErrNotFound == i)

        {

        LOG( "Observer not found" );

        PANIC( ECanNotFindBusActivityObserver);

        return;

        }

    iObservers.Remove(i);

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

        {

        // cancel pending request

        Cancel();

        }

    }

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

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

//

void CUsbBusActivityObserver::RunL()

    {

    LOG_FUNC

    LOG1( "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:

            {

            LOG("BusIdle");

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

                {

                iObservers[i]->BusIdleL();

                }

            break;

            }

        case EBusActive:

            {

            LOG("BusActive");

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

                {

                iObservers[i]->BusActiveL();

                }

            break;

            }

        default:

            {

            LOG("WrongBusState" );

            PANIC( EWrongBusState);

            }

        }

    }

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

// 

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

//

void CUsbBusActivityObserver::DoCancel()

    {

    iBusActivity.Cancel();

    }

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

// 

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

//

TInt CUsbBusActivityObserver::RunError(TInt aError)

    {

    LOG_FUNC

    LOG1( "aError = %d", aError );

    // try to continue	

    return KErrNone;

    }