/*

* 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 "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:  An implementation class for responding to Mediator Service commands.

*

*/

// INCLUDE FILES

#include    <e32base.h>

#include    "MediatorCommandResponderBody.h"

#include    "MediatorServerClient.h"

#include    "Debug.h"

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

CMediatorCommandResponderBody::CMediatorCommandResponderBody( MMediatorCommandObserver* aObserver )

    : CActive( EPriorityStandard ),

      iObserver( aObserver ),

      iCategoryBuffer( iCategory ), 

      iCommandBuffer( iCommand ),

      iCommandDataPtr( NULL, 0 ),

      iDestroyed( NULL )

    {

    }

void CMediatorCommandResponderBody::ConstructL()

    {

    CActiveScheduler::Add( this );

    User::LeaveIfError( iMediatorServer.Connect() );

    ResetDataBufferL( KMaxCommandData );

    }

CMediatorCommandResponderBody* CMediatorCommandResponderBody::NewL(

                MMediatorCommandObserver* aObserver )

    {

    CMediatorCommandResponderBody* self = new( ELeave ) CMediatorCommandResponderBody( aObserver );

    CleanupStack::PushL( self );

    self->ConstructL();

    CleanupStack::Pop( self );

    return self;

    }

CMediatorCommandResponderBody::~CMediatorCommandResponderBody()

    {

    Cancel();

    iMediatorServer.Close();

    delete iCommandData;

    if ( iDestroyed ) // RunL is being executed

        {

        *iDestroyed = ETrue;

        }

    }

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

// CMediatorCommandResponderBody::DoCancel

//  

// (other items were commented in a header).

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

//

void CMediatorCommandResponderBody::DoCancel()

    {

    TRACE(Print(_L("[Mediator Server]\t CMediatorCommandResponderBody::DoCancel\n")));

    iMediatorServer.Cancel();    

    }

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

// CMediatorCommandResponderBody::RunL

//  

// (other items were commented in a header).

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

//

void CMediatorCommandResponderBody::RunL()

    {

    TRACE(Print(_L("[Mediator Server]\t CMediatorCommandResponderBody::RunL status %d\n"), iStatus.Int() ));

    if ( iObserver )

        {

        // Set the flag to the member variable that is updated by the destructor 

        // in case this instance is destroyed by observer callback.

        // Otherwise an attempt to manipulate member data after destruction will cause a panic.

        TBool destroyed = EFalse;

        // Check if there is an error --> Cancel command

        if ( iStatus < 0 )

            {

            ERROR_TRACE(Print(_L("[Mediator] CMediatorCommandResponderBody::RunL: iStatus=%d\n"), iStatus.Int() ) );

            iDestroyed = &destroyed;

            iObserver->CancelMediatorCommand( iCategory.iDomain,

                                              iCategory.iCategory, 

                                              iCommand.iCommandId );

            }

        else    // Everything should be ok

            {

            // Check the parameter data size. If bigger than expected, fetch it synchronously

            TInt dataSize = iStatus.Int();

            if ( dataSize > iCommandDataPtr.MaxLength() )

                {

                // Reset data buffer for bigger size

                ResetDataBufferL( dataSize );

                // Fetch data from Mediator

                iMediatorServer.FetchParameterData( iCommandDataPtr );

                }

            iDestroyed = &destroyed; // can't set earlier because leaving functions are called

            // Issue callback to client. 

            // For some reason error handling can't be done in RunError because server stops forwarding commands

            TRAPD( err, iObserver->MediatorCommandL( iCategory.iDomain,

                                         iCategory.iCategory, 

                                         iCommand.iCommandId,

                                         iCommand.iVersion, 

                                         *iCommandData ) );

            if ( err != KErrNone ) // Errors only are propagated back to command initiator

                {

                ERROR_TRACE(Print(_L("[Mediator] CMediatorCommandResponderBody::RunL: err=%d\n"), err ) );

                if ( !destroyed )

                    {

                    iMediatorServer.IssueResponse ( iCategory.iDomain,

                                                    iCategory.iCategory,

                                                    iCommand.iCommandId,

                                                    err,

                                                    KNullDesC8 );    

                    }

                }

            }

        if ( destroyed ) // instance does not exist any longer, don't proceed to command receiving

            {

            return;

            }

        iDestroyed = NULL; // set to NULL, because variable goes out of scope soon            

        }

    // Continue command receiving

    // Wait for next commands                                      

    StartCommandReceiving();           

    }

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

// CMediatorCommandResponderBody::RegisterCommandL

// Register a command category.

// (other items were commented in a header).

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

//

TInt CMediatorCommandResponderBody::RegisterCommand( 

                                        TUid aDomain,

                                        TUid aCategory, 

                                        const RCommandList& aCommands )

    {

    LOG(_L("[Mediator Server]\t CMediatorCommandResponderBody::RegisterCommand list"));

    // Send the registration

    TInt status = iMediatorServer.RegisterCommandList( aDomain, aCategory, aCommands );

    if ( status == KErrNone )

        {

        // Wait for incoming commands

        StartCommandReceiving();                        

        }

    else

        {

        ERROR_TRACE(Print(_L("[Mediator] CMediatorCommandResponderBody::RegisterCommand: status=%d\n"), status ) );

        }

    return status;

    }

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

// CMediatorCommandResponderBody::RegisterCommandL

// Register a command.

// (other items were commented in a header).

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

//        

TInt CMediatorCommandResponderBody::RegisterCommand( TUid aDomain, 

                                                     TUid aCategory, 

                                                     TInt aCommandId, 

                                                     TVersion aVersion,

                                                     TCapabilitySet aCaps, 

                                                     TInt aTimeOut )

    {

    LOG(_L("[Mediator Server]\t CMediatorCommandResponderBody::RegisterCommand"));

    // Create a list to contain one command

    RCommandList commandList;

    TCommand newCommand;

    newCommand.iCommandId   = aCommandId;

    newCommand.iVersion     = aVersion;

    newCommand.iCaps        = aCaps;

    newCommand.iTimeout     = aTimeOut;

    TInt error = commandList.Append( newCommand );

    if ( error == KErrNone )

        {

        // Register command

        error = iMediatorServer.RegisterCommandList( aDomain,

                                                  aCategory,

                                                  commandList );

        if ( error == KErrNone ) 

            {

            // Wait for incoming commands

            StartCommandReceiving();    

            }

        else

            {

            ERROR_TRACE(Print(_L("[Mediator] CMediatorCommandResponderBody::RegisterCommand (ln%d): error=%d\n"), __LINE__, error ) );

            }

        }

    else

        {

        ERROR_TRACE(Print(_L("[Mediator] CMediatorCommandResponderBody::RegisterCommand (ln%d): error=%d\n"), __LINE__, error ) );    

        }        

    commandList.Reset();

    commandList.Close();

    return error;

    }

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

// CMediatorCommandResponderBody::UnregisterCommand

// Unregister a command list.

// (other items were commented in a header).

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

//        

TInt CMediatorCommandResponderBody::UnregisterCommand( 

                                            TUid aDomain, 

                                            TUid aCategory,

                                            const RCommandList& aCommands )

    {

    LOG(_L("[Mediator Server]\t CMediatorCommandResponderBody::UnregisterCommand list"));

    return iMediatorServer.UnregisterCommandList( aDomain, aCategory, aCommands );

    }

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

// CMediatorCommandResponderBody::UnregisterCommand

// Unregister a command.

// (other items were commented in a header).

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

//        

TInt CMediatorCommandResponderBody::UnregisterCommand( 

                                         TUid aDomain, 

                                         TUid aCategory, 

                                         TInt aCommandId )

    {

    LOG(_L("[Mediator Server]\t CMediatorCommandResponderBody::UnregisterCommand"));

    // Create a list to contain one command

    RCommandList commandList;

    TCommand command;

    command.iCommandId   = aCommandId;

    TInt error = commandList.Append( command );

    if ( !error )

        {

        // Unregister command

        error = iMediatorServer.UnregisterCommandList( aDomain,

                                                       aCategory,

                                                       commandList );

        }

    else

        {

        ERROR_TRACE(Print(_L("[Mediator] CMediatorCommandResponderBody::UnregisterCommand: error=%d\n"), error ) );

        }

    commandList.Reset();

    commandList.Close();

    return error;

    }

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

// CMediatorCommandResponderBody::IssueResponseL

// Issue a response to a command.

// (other items were commented in a header).

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

//        

TInt CMediatorCommandResponderBody::IssueResponse( TUid aDomain,

                                                   TUid aCategory, 

                                                   TInt aCommandId,

                                                   TInt aStatus, 

                                                   const TDesC8& aData )

    {

    LOG(_L("[Mediator Server]\t CMediatorCommandResponderBody::IssueResponse"));

    return iMediatorServer.IssueResponse( aDomain,

                                          aCategory,

                                          aCommandId,

                                          aStatus,

                                          aData );

    }

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

// CMediatorCommandResponderBody::StartCommandReceiving

// Starts to receive commands asynchronously

// (other items were commented in a header).

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

//    

void CMediatorCommandResponderBody::StartCommandReceiving()

    {

    if ( !IsActive() )

        {

        iMediatorServer.ReceiveCommands( iStatus,

                                         iCategoryBuffer,

                                         iCommandBuffer,

                                         iCommandDataPtr );

        SetActive();   

        }         

    }

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

// CMediatorCommandResponderBody::ResetDataBufferL

// Starts to receive commands asynchronously

// (other items were commented in a header).

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

//    

void CMediatorCommandResponderBody::ResetDataBufferL( TInt aSize )

    {

    if ( iCommandData )

        {

        delete iCommandData;

        iCommandData = NULL;

        }

    iCommandData = HBufC8::NewL( aSize );

    iCommandDataPtr.Set( iCommandData->Des() );

    }

//  End of File