/*

* Copyright (c) 2006-2006 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:  Engine class for Device Status Plug-in

*

*/

#ifndef AIDEVICESTATUSPLUGINENGINE_H

#define AIDEVICESTATUSPLUGINENGINE_H

#include <e32base.h>

#include <aisystemuids.hrh>

#include "aipublisherbroadcaster.h"

#include "aidevicestatuspublisher.h"

//device status plugin UI

const TInt KImplUidDevStaPlugin = AI_UID_ECOM_IMPLEMENTATION_CONTENTPUBLISHER_DEVSTAPLUGIN;

class MAiContentObserver;

class MAiPropertyExtension;

class MAiPublishPrioritizer;

/**

 *  @ingroup group_devicestatusplugin

 *

 *  Engine class for Device Status Plug-in

 *

 *  This class works as an engine for Device Status Plug-in.

 *  It owns the publishers and communicates between them and

 *	the subscribers.

 *

 *  @since S60 v3.2

 */

class CAiDeviceStatusPluginEngine : public CBase, public MAiPublisherBroadcaster

    {

public:

    static CAiDeviceStatusPluginEngine* NewL( MAiContentObserver& aObserver, 

                                                MAiPropertyExtension& aExtension,

                                                MAiPublishPrioritizer& aPrioritizer);

    virtual ~CAiDeviceStatusPluginEngine();

    /**

     * Resumes all publishers.

     */

    void ResumePublishersL();

    /**

     * Refreshes all publishers.

     * @param aClean Indicates if publishers should clean their content before

     *                  re-publish.

     */    

    void RefreshPublishersL( TBool aClean );

    /**

     * Refreshes specific publishers.

     * @param aContentId Indicates which publishers should publish their 

     *                  content.

     * @param aClean Indicates if publishers should clean their content before

     *                  re-publish.

     * @return ETrue if publisher informed that publish was successful.

     */    

    TBool RefreshPublishersL( TInt aContentId, TBool aClean );

public: // from MAiPublisherBroadcaster

    TBool RefreshPriorizedPublishersL( TInt aContentId, TInt aPriority );

private:

    CAiDeviceStatusPluginEngine( MAiContentObserver& aObserver, 

								    MAiPropertyExtension& aExtension,

                                    MAiPublishPrioritizer& aPrioritizer);

    void ConstructL();

     /**

      * Add Device Status publisher.

      */

    void AddPublisherL( MAiDeviceStatusPublisher* aPublisher );

private: // data

    /**

     * Array of publishers.

     * Own.

     */

    RPointerArray<MAiDeviceStatusPublisher> iPublishers;

    /**

     * Content observer.

     * Not own.

     */

    MAiContentObserver* iContentObserver;

    /**

     * Property extension.

     * Not own.

     */

    MAiPropertyExtension* iExtension;

	/**

	 * Content prioritizer.

	 * Not own.

	 */

	MAiPublishPrioritizer* iPrioritizer;

    };

#endif // AIDEVICESTATUSPLUGINENGINE_H