/*

* 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 class that holds the shared connection to a access point.

*

*/

#ifndef HTTP_CONNECTION_H

#define HTTP_CONNECTION_H

// INCLUDES

#include <e32base.h>

#include <mconnectioncallback.h>

// CONSTANTS

// MACROS

// DATA TYPES

// FUNCTION PROTOTYPES

// FORWARD DECLARATIONS

// CLASS DECLARATION

/**

*  In interface which is called when the access point becomes available.

*

*  \b Library: FeedsEngine.lib

*

*  @since 3.0

*/

class MHttpConnectionObserver

    {

    public:

        /**

        * Notifies the observer that the connection is available.

        * 

        * @since 3.0

        * @return 

        */

        virtual void ConnectionAvailable() = 0; 

        /**

        * Notifies the observer that the establishment of the connection failed.

        * 

        * @since 3.0

        * @param aStatus The reason for the failure.

        * @return 

        */

        virtual void ConnectionFailed(TInt aStatus) = 0; 

    };

/**

*  A base class for http connection.

*

*  \b Library: FeedsEngine.lib

*

*  @since 3.0

*/

class CHttpConnection: public CBase, public MConnectionCallback

    {

    public:  // Destructor

        /**

        * Destructor.

        */        

        virtual ~CHttpConnection();

    public: // From MConnectionCallback        

        /**

        * This function cancel outstanding transactions and notify a user 

        * with the message "Out of coverage"

        * 

        * @since 3.0

        * @param aError Timeout error etc

        * @return 

        */

        virtual void CoverageEvent(TInt aError); 

    public:  // New methods.

        /**

        * Sets the observer.  In practice this is only set 

        * once during the lifetime of the instance.

        *

        * @since 3.0

        * @param aObserver The observer -- NULL is a valid value.

        * @return void.

        */

        void SetObserver(MHttpConnectionObserver* aObserver);

        /**

        * Returns the session.

        *

        * @since 3.0

        * @return The session.

        */

        RHTTPSession& Session();

        /**

        * Returns whether or not the connection is active.

        *

        * @since 3.0

        * @return void.

        */

        virtual TBool IsConnected() = 0;

        /**

        * Closes the connection.

        *

        * @since 3.0

        * @return void.

        */

        virtual void Disconnect() = 0;

		public: // New method for proper object deletion

        /**

        * Calls delete when stack is unrolled

        *

        * @since 5.0

        * @return void

        */

        void AutoDelete();

        /**

        * Callback function to delete object

        *

        * @since 5.0

        * @return TInt (EFalse)

        */

        static TInt DelayedDelete(TAny* aPtr);

    protected:

        /**

        * C++ default constructor.

        */

        CHttpConnection();

        /**

        * By default Symbian 2nd phase constructor is private.

        */

        void BaseConstructL();

    protected:

        RHTTPSession                 iSession;

        CIdle*                       iAutoDelete;

        MHttpConnectionObserver*     iObserver;

    };

#endif      // HTTP_CONNECTION_H

// End of File