/*

* Copyright (c) 2005 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "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:  A task to update all Feeds.

*

*/

#ifndef UPDATE_ALL_FEEDS_TASK_H

#define UPDATE_ALL_FEEDS_TASK_H

// INCLUDES

#include <e32base.h>

#include "UpdateFeedTask.h"

#include "Task.h"

// CONSTANTS

// MACROS

// DATA TYPES

// FUNCTION PROTOTYPES

// FORWARD DECLARATIONS

class CPackedFeed;

class CUpdateFeedTask;

class CCheckDiskSpace;

// CLASS DECLARATION

/**

*  The UpdateAllFeedsTask's observer.

*

*  \b Library: FeedsEngine.lib

*

*  @since 3.1

*/

class MUpdateAllFeedsTaskObserver

    {

    public: 

        /**

        * Notifies the observer that the task is about to start a lengthy 

        * operation.  In response the observer could display somekind of 

        * status indicator.

        *

        * @since 3.1

        * @return void.

        */

        //virtual void StartWait() = 0;

        /**

        * Called to notify the obsever how many feeds remain to be updated.

        *

        * @since 3.1

        * @param aStatusCode The completion status of the request.

        * @return Void

        */

        virtual void UpdateAllFeedsProgress(TInt aMaxCount, TInt aRemaining) = 0;

        /**

        * Called upon completion of the task.

        *

        * @since 3.1

        * @param aStatusCode The completion status of the request.

        * @return Void

        */

        virtual void UpdateAllFeedsCompleted(TInt aStatusCode) = 0;

        /**

        * Called upon start of the task.

        *

        * @since 3.1

        * @param .

        * @return connection

        */

        virtual CHttpConnection& HttpConnection() = 0;

    };

/**

*  A task to update a Feed.

*

*  \b Library: FeedsEngine.lib

*

*  @since 3.1

*/

class CUpdateAllFeedsTask: public CTask, public MUpdateFeedTaskObserver

    {

    public:  // Constructors and destructor

        /**

        * Two-phased constructor.

        */

        static CUpdateAllFeedsTask* NewL(CFeedsServer& aFeedsServer, 

                TInt aFolderListId, MUpdateAllFeedsTaskObserver& aObserver);

        /**

        * Two-phased constructor.

        * For a folder list, only update selected feeds

        */

        static CUpdateAllFeedsTask* NewL(CFeedsServer& aFeedsServer,

                TInt aFolderListId, const RArray<TInt>& aFeedIds, MUpdateAllFeedsTaskObserver& aObserver);

        /**

        * Destructor.

        */        

        virtual ~CUpdateAllFeedsTask();

    public:  // From CTask

        /**

        * Starts the task.

        *

        * @since 3.1

        * @return Void

        */

        virtual void StartTaskL();

    public:  // From MUpdateFeedTaskObserver

        /**

        * Notifies the observer that the task is about to start a lengthy 

        * operation.  In response the observer could display somekind of 

        * status indicator.

        *

        * @since 3.1

        * @return void.

        */

        virtual void StartWait();

        /**

        * Called upon completion of the task.

        *

        * @since 3.1

        * @param aPackedFeed The resulting feed.  aPackedFeed is adopted by the 

        *                    implementing class.

        * @param aFeedUrl The feed's url.

        * @param aFeedId feed id

        * @param aStatusCode The completion status of the request.

        * @return Void

        */

        virtual void Completed(CPackedFeed* aPackedFeed, const TDesC& aFeedUrl,TInt aFeedId, TInt aStatusCode);

        /**

        * Called upon start of the task.

        *

        * @since 3.1

        * @param .

        * @return connection

        */

        virtual CHttpConnection& HttpConnection();

    public:

        /**

        * Adding the FeedIDs for updation .

        *

        * @since 7.1

        * @param aFeedIds.

        * @return Integer

        */

        TInt AddFeedL( RArray<TInt> aFeedIds);

        /**

        * Called upon completion of the task.

        *

        * @since 7.1

        * @param aStatusCode The completion status of the request.

        * @return Void

        */

        void UpdateAllFeedsCompleted(TInt aStatusCode);

    private:

        /**

        * C++ default constructor.

        */

        CUpdateAllFeedsTask(CFeedsServer& aFeedsServer, TInt aFolderListId, 

                MUpdateAllFeedsTaskObserver& aObserver, TBool aSelected);

        /**

        * By default Symbian 2nd phase constructor is private.

        */

        void ConstructL();

        /**

        * Starts the update of the next feed.

        *

        * @since 3.1

        * @return void.

        */

        void UpdateNextFeedL();

    private:

        TLeakTracker                  iLeakTracker;

        MUpdateAllFeedsTaskObserver&  iObserver;

        TInt                          iFolderListId;

        RArray<TInt>                  iFeedIds;

        TInt                          iNextFeedIndex;

        CUpdateFeedTask*              iUpdateFeedTask;

        TBool                         iSelected;

        CCheckDiskSpace*              iCheckDiskSpace ;

    };

/**

*  Checks disk space.

*

*  \b Library: FeedsEngine.lib

*

*  @since 7.1

*/

// CLASS DECLARATION

class CCheckDiskSpace : public CActive

    {

    public:	// Constructors and destructor

        /**

        * Two-phased constructor.

        */

        static CCheckDiskSpace* NewL(CUpdateAllFeedsTask*);

        /**

        * Destructor.

        */

        ~CCheckDiskSpace();

     private://	Constructor

        /**

        * C++ default constructor.

        */ 	

        CCheckDiskSpace();

        /**

        * By default Symbian 2nd phase constructor is private.

        *

        * @param pointer to CFeedsServer class,This pointer will be used to make server sleep and to wake up server

        *

        */

        void ConstructL(CUpdateAllFeedsTask*);

    public:	//Functions from CActive Class

        /**

        * Handles an active object's request completion event.

        *

        * @since 7.1

        * @return void.

        */

        void RunL();

        /**

        * Called by CActiveScheduler when RunL() Method leaves.

        *

        * @since 7.1

        * @return void.

        */

        void RunError();

        /**

        * Called by CActiveScheduler when Cancel() Method is called.

        *

        * @since 7.1

        * @return void.

        */

        void DoCancel();

        /**

        * This method subscribe to receive event when OS level

        * when the memory in the C: drive falls below a certain level

        *

        * @since 7.1

        * @return void.

        */

        void StartListening();

    private:

        CUpdateAllFeedsTask* iUpdateAllFeedsTask;

        RFs                 iRfs;

        TBool               iIsListening;

    };

#endif      // UPDATE_ALL_FEEDS_TASK_H

// End of File