/*

* Copyright (c) 2007-2008 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:  Provides implementation for CTelSrvBase -class.

*

*/

#include "ctelsrvbase.h"

#include "telsrvlogger.h"

// ======== MEMBER FUNCTIONS ========

// ---------------------------------------------------------------------------

// C++ constructor.

// ---------------------------------------------------------------------------

//

CTelSrvBase::CTelSrvBase()

    {

    // No implementation required

    }

// ---------------------------------------------------------------------------

// Destructor

// ---------------------------------------------------------------------------

//

CTelSrvBase::~CTelSrvBase()

    {

    delete iCommandBuffer;

    delete iWaitForCommandResponse;

    delete iMediatorService;

    }

// ---------------------------------------------------------------------------

// Symbian second-phase constructor.

// ---------------------------------------------------------------------------

//

void CTelSrvBase::BaseConstructL( CMediatorService* aMediatorService )

    {

    iMediatorService = aMediatorService;

    iWaitForCommandResponse = new( ELeave )CActiveSchedulerWait();

    iCommandBuffer = CIdle::NewL( CActive::EPriorityHigh );

    iMediatorService->SetObserver(this);    

    //event might come while getting initial state so subscribe it first.

    SubscribeMediatorEventL();    

    Initialize();

    }

// ---------------------------------------------------------------------------

// From class MMediatorCommandResponseObserver.

// A response to a Mediator Service command.

// ---------------------------------------------------------------------------

//

void CTelSrvBase::CommandResponseL( const TDesC8& aData )

  {

  TSLOGSTRING("CTelSrvBase::CommandResponseL <<");

  if( iWaitForCommandResponse->IsStarted() )

      {

      iWaitForCommandResponse->AsyncStop();

      DoHandleCommandResponseL( aData );

      }  

  }

// ---------------------------------------------------------------------------

// From class MMediatorCommandResponseObserver.

// for handling a Mediator Service event.

// ---------------------------------------------------------------------------

//

void CTelSrvBase::MediatorEventL( const TDesC8& aData )

    {

    TSLOGSTRING("CTelSrvBase::MediatorEventL <<");

    // Command response can be discarded if event is received

    // while waiting for response.

    if( iWaitForCommandResponse->IsStarted() )

        {

        iWaitForCommandResponse->AsyncStop();

        }  

    DoHandleMediatorEventL( aData );

    }

// ---------------------------------------------------------------------------

// Get the current info through Mediator.

// ---------------------------------------------------------------------------

//

void CTelSrvBase::Initialize(  )

  {

  TSLOGSTRING("CTelSrvBase::Initialize <<");

  TInt error = iMediatorService->SendCommand();    

  if( KErrInUse == error )    //Command needs to be re-send

      {        

      if ( !iCommandBuffer->IsActive() )

          {

          iCommandBuffer->Start( TCallBack( DoReSendCommand, this ) );          

          }

      }

  if( !iWaitForCommandResponse->IsStarted() )

      {

      iWaitForCommandResponse->Start();

      }

  }

// ---------------------------------------------------------------------------

// Starts re-sending mediator command.

// ---------------------------------------------------------------------------

//

TInt CTelSrvBase::DoReSendCommand(TAny* aPtr)

    {    

    TSLOGSTRING("CTelSrvBase::DoReSendCommand <<");

    CTelSrvBase* self = 

            static_cast< CTelSrvBase* >( aPtr );            

    self->Initialize();         

    return KErrNone;        

    }

// ---------------------------------------------------------------------------

// Subscribes to Mediator event.

// ---------------------------------------------------------------------------

//

void CTelSrvBase::SubscribeMediatorEventL()

    {

    TSLOGSTRING("CTelSrvBase::SubscribeMediatorEventL <<");

    TInt err = iMediatorService->SubscribeEvent();                                                                

    User::LeaveIfError( err );

    TSLOGSTRING("CTelSrvBase::SubscribeMediatorEventL >>");

    }