/*
 * 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:  Manages notifiers
 *
 */

#ifndef C_USBNOTIFMANAGER_H
#define C_USBNOTIFMANAGER_H

#include <e32base.h>

// forward declaration
class CUsbNotifier;
class CUsbIndicatorNotifier;
class CUsbOtgWatcher;

// pause warning is visible for (ms)
const TUint KPauseForWarnings = 1000000; // 1 sec

/**
 * Observer has to implement this interface to get feedback on user action
 * Notification received when Whait notified completed (cancelled ot key pressed) 
 */
NONSHARABLE_CLASS( MWaitNotifierObserver)
    {
public:

    /**
     * feedback to observer
     * @param aFeedback how notifier comleted 
     */
    virtual void WaitNotifierCompletedL(TInt aFeedback) = 0;
    };

/**
 * this class contains information for wait notifier
 * once notifier gets response from user, notif manager will send feedback data to caller
 */
NONSHARABLE_CLASS( CWaitNotifierInfo ) : public CBase
    {
public:

    /**
     * 2-phase construction
     * @param aWaitNotifier owner
     * aObserver will receive notification when completed 
     */
    static CWaitNotifierInfo* NewL(CUsbNotifier* aWaitNotifier,
            MWaitNotifierObserver& aObserver);

    /**
     * Destructor
     */
    virtual ~CWaitNotifierInfo();

    /**
     * gets wait notifier
     */
    CUsbNotifier* WaitNotifier() const;

    /**
     * gets observer
     */
    MWaitNotifierObserver* Observer() const;

private:

    /**
     * Default constructor
     * @param aWaitNotifier Notifier
     * @param aObserver Observer
     */
    CWaitNotifierInfo(CUsbNotifier* aWaitNotifier,
            MWaitNotifierObserver& aObserver);

    /**
     * 2nd phase construction
     */
    void ConstructL();

private:

    /**
     * notifier
     * owns
     */
    CUsbNotifier* iWaitNotifier;

    /**
     * observer
     * not owns
     */
    MWaitNotifierObserver& iObserver;
    };

/**
 *  Function of the class is own and share RNotifier, own list of CWaitNotifier(s),
 *	show notifiers, which are synchronous, and cancel it with a delay 
 */
class CUsbNotifManager : public CBase
    {
    
public:

    /**
     * 2phase construction
     * @param aOtgWatcher OtgWatcher is a parent class
     */
    static CUsbNotifManager* NewL(CUsbOtgWatcher& aOtgWatcher);

    /**
     * Destructor
     */
    virtual ~CUsbNotifManager();

    /**
     * Shows notifier
     * @param aCat Category
     * @param aNotifId notifier id
     * @param aObserver will receive notifications
     */
    void ShowNotifierL(TUid aCat, TUint aNotifId,
            MWaitNotifierObserver* aObserver);

    /**
     * Closes and deletes all the notifiers
     */
    void CloseAllNotifiers();

    /** 
     * Calls back Notifier show is over
     * @param aWaitNotifier wait notifier
     * @param aResult result (was any errors or not)
     * @param aFeedback user press (cancel or any other) 
     */
    void NotifierShowCompletedL(CUsbNotifier& aWaitNotifier, TInt aResult,
            TInt aFeedback);

private:

    /**
     * Default construction
     * @param aOtgWatcher otg watcher (parent class)
     */
    CUsbNotifManager();

    /**
     * Second phase construction
     */
    void ConstructL(CUsbOtgWatcher& aOtgWatcher);

private:
    // data

    /**
     * RNotifier API
     */
    RNotifier iNotifier;

    /**
     * List of notifiers waiting for user action
     */
    RPointerArray<CWaitNotifierInfo> iWaitNotifiers;

    /**
     * Own
     * USB indicator
     */
    CUsbIndicatorNotifier* iIndicatorNotifier;
    };

#endif // C_USBNOTIFMANAGER_H