/*

* Copyright (c) 2009 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: 

*

*/

#ifndef CMODEMATSESSION_H

#define CMODEMATSESSION_H

#include <e32svr.h>

class CModemAtSrv;

class RModemAtController;

// CLASS DECLARATION

/**

*  CModemAtSession receives and completes client's requests. CModemAtSession forwards

*  requests to the CModemAtSrv.

*/

NONSHARABLE_CLASS( CModemAtSession ) : public CSession2

    {

public:

    /**

     * Two-phased constructor.

     * @param aServer

     * @return Instance of self

     */

    static CModemAtSession* NewL( CModemAtSrv& aServer, const TVersion& aVersion );

   /**

    * Destructor.

    */

    ~CModemAtSession();

    /**

     *  Called by CModemAtHandler, when Unsolicitated data ind is received  

     */

    void UnsolicitedData( const TDesC8& aData );

    /**

     *  Called by CModemAtHandler, when signal ind is received  

     */

    void SignalIndReceived( );

    /**

      * Returns name of current session  

      * @return Session name 

      */    

    TDesC8& GetName();

    /**

      * Returns plugin type (common/atext) 

      *  @return Plugintype 

      */    

    TATPluginInterface GetPluginType();

    /**

     *  Modem-Connected-callback. Called when modem is connected.

     *  @param aDteId DteId

     *  @param aErr Error code

     *  @return 

     */

    void ModemConnected( const TInt aErr );

    /**

     *  CommandModeChanged. Called when pipe handle indicates that mode is changed.

     *  @param aMode TCommandMode aMode

     *  @return 

     */

    void CommandModeChanged( TCommandMode aMode ) ;

    /**

     *  IsUnsolicitedDataReqActive

     *  @return ETrue if request is active, otherwise EFalse

     */

    TBool IsUnsolicitedDataReqActive();

    /**

     *  IsSignalIndReqActive

     *  @return ETrue if request is active, otherwise EFalse

     */

    TBool IsSignalIndReqActive();

    /**

     *  IsCommandModeReqActive

     *  @return ETrue if request is active, otherwise EFalse

     */

    TBool IsCommandModeReqActive();

    /**

     *  IsConnectReqActive

     *  @return ETrue if request is active, otherwise EFalse

     */

    TBool IsConnectReqActive();

private:

    // from base class CSession2    

    void ServiceL( const RMessage2& aMessage );

    void DoServiceL( const RMessage2& aMessage );

    /**

     *  Checks if there is existing request and completes it.

     *  @param aMessage Message to be checked.

     *  @return ETrue if there was request already pending. 

     */

	  TBool CheckAndCompleteExistingRequest( const RMessage2& aMessage );

private:  

    /**

     * Default C++ constructor.

     * @param aServer   Reference to the CModemAtsrv

     * @param aVersion  Version of client

     * @param aHandler  Reference to the CModemAtHandler

     */

    CModemAtSession( CModemAtSrv& aServer, const TVersion& aVersion );

    // data

    CModemAtSrv& iServer;

    RMessage2 iConnectReq;

    RMessage2 iSignalIndReq;

    RMessage2 iUnsolicitedDataReq;

    RMessage2 iCommandModeReq;

    TVersion iVersion;

    HBufC8* iClientName;

    TATPluginInterface iPluginType;

    TPtr8 iClientNamePtr;

    };

#endif  // CMODEMATSESSION_H