/*

 * 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:  Observes notifications from usb

 *

 */

#ifndef C_USBMESSAGENOTIFICATIONOBSERVER_H

#define C_USBMESSAGENOTIFICATIONOBSERVER_H

#include <e32base.h>

#include <e32property.h>

#include <usbotgdefs.h>

class RUsb;

/**

 * Class implements functionality of showing/blinking usb indicator

 * Class does not provide method to get response from the user

 */

NONSHARABLE_CLASS( MUsbMessageNotificationObserver)

    {

public:

    /**

     * Call back on message notification

     * @param aMessage Message id

     */

    virtual void MessageNotificationReceivedL(TInt aMessage) = 0;

    /**

     * Called when BadHubPosition error happen

     */

    virtual void BadHubPositionL() = 0;

    /**

     * Callen if VBus error happen

     */

    virtual void VBusErrorL() = 0;

    /**

     * Called when SRP request received

     */

    virtual void SrpReceivedL() = 0;

    /**

     * Called when session requested

     */

    virtual void SessionRequestedL() = 0;

    /**

     * Called when error happened

     * @param aError error code

     */

    virtual void MessageNotificationErrorL(TInt aError) = 0;

    };

/**

 *  Class observes USB Notifications

 *

 */

NONSHARABLE_CLASS( CUsbMessageNotificationObserver ) : public CActive

    {

public:

    /**

     * Two-phased constructor.

     * @param aUsb usbman

     */

    static CUsbMessageNotificationObserver* NewL(RUsb* aUsb);

    /**

     * Destructor.

     */

    virtual ~CUsbMessageNotificationObserver();

    /**

     * Subscribes for notifications

     * @param aObserver observer

     */

    void SubscribeL(MUsbMessageNotificationObserver& aObserver);

    /**

     * Unsubscribe from notifications

     * @param aObserver Observer

     */

    void UnsubscribeL(MUsbMessageNotificationObserver& aObserver);

private:

    // From CActive

    /**

     * Called by framework when outstanding request completed

     *

     */

    void RunL();

    /**

     * Called when outstanding request camcelled

     *

     */

    void DoCancel();

    /**

     * Called when RunL leaves

     *

     * @param aError error id

     * @return error id 

     */

    TInt RunError(TInt aError);

private:

    /**

     * Default constructor

     * @param aUsb usbman

     */

    CUsbMessageNotificationObserver(RUsb* aUsb);

    /**

     * Second phase construction

     */

    void ConstructL();

private:

    // data

    /**

     * The observer reports to own observers

     * Not owns

     */

    RPointerArray<MUsbMessageNotificationObserver> iObservers;

    /**

     * Notifications come from USB

     * Not own

     */

    RUsb* iUsb;

    /**

     * Info from notification comes to this member

     */

    TInt iMessage;

    };

#endif //  C_USBMESSAGENOTIFICATIONOBSERVER_H