/*

* Copyright (c) 2010 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:  Photos image fetcher client.

*

*/

#include <QList>

#include <caservice.h>

#include <canotifier.h>

#include <canotifierfilter.h>

#include "hsmenuentryremovedhandler.h"

/*!

    \class HsMenuEntryRemovedHandler

    Listens for entry removal notifications and calls a callback.

    \ingroup group_hsutils

    \brief 

*/

/*!

 Constructor.

 \param entryId identifies entry which removal is to be observed. If 0 no entry

 will be observed.

 \param receiver object which \a callback is to be called on requested entry

 removal. If \receiver is passed 0 no action will be taken on the entry removal.

 \param callback signal or slot that will be called on entry removal. The \a callback

 signature should correspond to void (*)(int, ChangeType) signal otherwise

 runtime warning will be provided. If \a callback is 0 no action will be

 taken on the entry removal.

*/

HsMenuEntryRemovedHandler::HsMenuEntryRemovedHandler(

    int entryId, 

    QObject *receiver,

    const char *callback):

    mNotifier(0)

{

    if (entryId != 0 && receiver != 0 && callback != 0) {

        connect(this, SIGNAL(notify()), receiver, callback);

        subscribe(entryId);

    }

};

/*!

 Destructor.

*/

HsMenuEntryRemovedHandler::~HsMenuEntryRemovedHandler() {};

/*!

  Subscribes the observer for notifications for a given entryId and

  makes sure the \a HsMenuEntryRemovedObserver::entryChagned will be called

  on any notification for the entry.

  \param entryId identifier of the entry to be observed.

*/

void HsMenuEntryRemovedHandler::subscribe(int entryId)

{

    // create notifier for a given entryId

    CaNotifierFilter filter;

    QList<int> entryIds;

    entryIds.append(entryId);

    filter.setIds(entryIds);

    mNotifier.reset(CaService::instance()->createNotifier(filter));

    connect(mNotifier.data(),

        SIGNAL(entryChanged(int, ChangeType)),

        this,

        SLOT(entryChanged(int, ChangeType)),

        Qt::UniqueConnection);

}

/*!

 Handles notification about entry change

 \param entryId ignored as the observer is subscribed for exactly one entry.

 \param changeType notified change type.

 */

void HsMenuEntryRemovedHandler::entryChanged(int entryId, 

    ChangeType changeType)

{

    Q_UNUSED(entryId); // CaNotifier should care about matching id, skip it here

    if (changeType == RemoveChangeType) {

        mNotifier.reset(0);

        emit notify();

    }

}