/*

* 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:  Base class for client side request handling.

*

*/

#ifndef REQUEST_HANDLER_H

#define REQUEST_HANDLER_H

// INCLUDES

#include <e32base.h>

#include <e32std.h>

// CONSTANTS

// MACROS

// DATA TYPES

// FUNCTION PROTOTYPES

// FORWARD DECLARATIONS

// CLASS DECLARATION

class RFeedsInterface;

class CRequestHandler;

/**

*  The CRequestHandler observer interface.

*

*  \b Library: FeedsEngine.lib

*

*  @since 3.1

*/

class MRequestHandlerObserver : public MConnectionObserver

	{

    public:  // New Methods

        /**

        * Requests the observer to send a command to the server.

        *

        * @since 3.1

        * @param aFunction The function number identifying the request. 

        * @param aArgs A set of up to 4 arguments and their types to be passed to the server.

        * @param aStatus The request status object used to contain the completion status of the request.

        * @return void.

        */

        virtual void SendAsyncCommand(TInt aFunction, const TIpcArgs& aArgs, 

                TRequestStatus& aStatus) const = 0;

        /**

        * Notifies the observer that the request is completed.

        *

        * @since 3.1

        * @param aRequestHandler The request handler.

        * @param aStatus The result code of the request.

        * @return void.

        */

        virtual void RequestHandlerCompleted(CRequestHandler& aRequestHandler,

                TInt aStatus) = 0;

        /**

        *

        */

        virtual void CancelAllCommandsL() = 0;

	};

/**

*  Base class for client side request handling.

*

*  \b Library: FeedsEngine.lib

*

*  @since CCB (7.1)

*/

class CRequestHandler: public CBase

	{

public:  // Data types

    enum TRequestHandlerType

        {

        ENone = 0,

        // folder related

        EFetchRootFolderItem,

        EWatchForChanges,

        EAddFolderItem,

        EDeleteFolderItem,

        EChangeFolderItem,

        EMoveFolderItem,

        EMoveFolderItemTo,

        EUpdateFolderItem,

        EImportOPML,

        EExportOPML,

        // feed related

        EFetchFeed,

        EUpdateItemStatus,

        // general client related

        EChangeSettings,

        EFetchSettings,

        EWatchForSettingChanges,

        ECancelAll,

        EDisconnectManualUpdateConnection,

        EPrintDBTables

        };

public:

        /**

         * C++ default constructor.

         */

        CRequestHandler();

        /**

        * Destructor

        */

        virtual ~CRequestHandler();

    };

#endif  // REQUEST_HANDLER_H

// End of File