// Copyright (c) 2007-2010 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:

//

// INCLUDE FILES

#include "featmgrsession.h"

#include "featmgrfeatureentry.h"

#include "featmgrdebug.h"

// CONSTANTS

const TInt CFeatMgrPendingRequest::iOffset = _FOFF( CFeatMgrPendingRequest,iLink );

// LOCAL CONSTANTS AND MACROS

_LIT( KPanicCategory, "FeatMgrSession" );

// ============================= LOCAL FUNCTIONS ===============================

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

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

// CFeatMgrSession::CFeatMgrSession

// C++ constructor

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

//

CFeatMgrSession::CFeatMgrSession( CFeatMgrServer& aServer, CFeatMgrFeatureRegistry& aRegistry )

    : iFeatMgrServer( aServer ),

    iRegistry( aRegistry ),

    iList( CFeatMgrPendingRequest::iOffset )

    {

    }

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

// CFeatMgrSession::NewL

// Two-phased constructor.

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

//

CFeatMgrSession* CFeatMgrSession::NewL( CFeatMgrServer& aServer, 

    CFeatMgrFeatureRegistry& aRegistry )

    {

    FUNC_LOG

    CFeatMgrSession* self = new( ELeave ) CFeatMgrSession( aServer, aRegistry );

    return self;

    }

#ifdef EXTENDED_FEATURE_MANAGER_TEST

void CFeatMgrSession::CreateL()

    {

    iFeatMgrServer.AddSession();

    }

#endif

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

// Destructor

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

//

CFeatMgrSession::~CFeatMgrSession()

    {

    FUNC_LOG

    iNotifyFeatures.Close();

    while ( !iList.IsEmpty() )

        {

        CFeatMgrPendingRequest* pendingReq = iList.First();  

        iList.Remove( *pendingReq );

        delete pendingReq;

        }

    iList.Reset();

#ifdef EXTENDED_FEATURE_MANAGER_TEST

    iFeatMgrServer.DropSession();

#endif

    }

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

// CFeatMgrSession::PanicClient

// RMessage2::Panic() also completes the message. This is:

// (a) important for efficient cleanup within the kernel

// (b) a problem if the message is completed a second time

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

//

void CFeatMgrSession::PanicClient( const RMessage2& aMessage, TFeatMgrPanic aPanic )

    {

    INFO_LOG1( "CFeatMgrSession::PanicClient(aPanic 0x%x)", aPanic);

	aMessage.Panic( KPanicCategory, aPanic );

    }

TBool CFeatMgrSession::IsWriteOperation( const TInt aFunction ) const

    {

        switch ( aFunction )

            {

            case EFeatMgrEnableFeature:

            case EFeatMgrDisableFeature:

            case EFeatMgrAddFeature:

            case EFeatMgrSetFeatureAndData:

            case EFeatMgrSetFeatureData:

            case EFeatMgrDeleteFeature:

            case EFeatMgrSWIStart:

            case EFeatMgrSWIEnd:

                return ETrue;

            default:

                return EFalse;

            }

    }

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

// CFeatMgrSession::ServiceL

// Calls request handling functions. Also traps any leaves and signals client if

// error occurs.

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

//

void CFeatMgrSession::ServiceL( const RMessage2& aMessage )

    {

    FUNC_LOG

    // If plugins are not ready all request will be queued. 

    // During backup & restore operation, all write request 

    //  e.g. EnableFeature will return with KErrServerBusy

    TInt msgCmd = aMessage.Function();

    if ( !iFeatMgrServer.PluginsReady() || ( iFeatMgrServer.BURIsInProgress()  && IsWriteOperation( msgCmd ) ) )

        {

        if ( iFeatMgrServer.BURIsInProgress() )

            {

            INFO_LOG( "CFeatMgrSession::ServiceL() - backup/restore is in progress - no write operation allowed" );

            aMessage.Complete( KErrServerBusy );

            }

        else

            {

            INFO_LOG( "CFeatMgrSession::ServiceL() - plugins not ready" );

            CFeatMgrPendingRequest* request=NULL;

            TRAPD(error,request=CFeatMgrPendingRequest::NewL( aMessage ));

            if (error!=KErrNone)

              {

              LOG_IF_ERROR1( error, "CFeatMgrSession::ServiceL(): Error in Adding Pending Request: %d", error );

              //cannot create pending request so need to indicate to the client rather than letting the cient wait forever.

              aMessage.Complete(error);              

              }

            else

              {

              iList.AddLast(*request);

              }

            }

        }

    else

        {

        #if defined(FEATMGR_INFO_LOG_ENABLED)

            // check memory usage

            TInt biggestBlock;

            INFO_LOG1( "CFeatMgrSession::ServiceL() - #### Memory Available in Heap: %6d ####", 

                                    User::Heap().Available(biggestBlock) );

            INFO_LOG1( "CFeatMgrSession::ServiceL() - #### Biggest block:            %6d ####", 

                                    biggestBlock );

        #endif

        TRAPD( error, DispatchMessageL( aMessage ) );

        LOG_IF_ERROR1( error, "CFeatMgrSession::ServiceL(): Error in DispatchMessageL: %d", 

                                     error );

        if( aMessage.Function() != EFeatMgrReqNotify )

            {

            aMessage.Complete( error );

            }

        }

    }

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

// CFeatMgrSession::ServicePendingRequestsL

// Calls request handling functions. Also traps any leaves and signals client if

// error occurs.

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

//

void CFeatMgrSession::ServicePendingRequestsL()

    {       

    FUNC_LOG

    while ( !iList.IsEmpty() )

        {

        CFeatMgrPendingRequest* pendingReq = iList.First();  

        TRAPD( error, DispatchMessageL( pendingReq->iMessage ) );

        LOG_IF_ERROR1( error, "CFeatMgrSession::ServicePendingRequestsL(): Error in DispatchMessageL: %d", 

            error );

        if( pendingReq->iMessage.Function() != EFeatMgrReqNotify )

            {

            pendingReq->iMessage.Complete( error );

            }

        iList.Remove( *pendingReq );

        delete pendingReq;

        }

    iList.Reset();

    }

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

// CFeatMgrSession::DispatchMessageL

// Calls matching function of CFeatMgrServer for handling the request.

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

//

void CFeatMgrSession::DispatchMessageL( const RMessage2& aMessage )

    {

    FUNC_LOG

    INFO_LOG1( "CFeatMgrSession::DispatchMessageL(0x%x)", aMessage.Function() );

    TInt msgCmd = aMessage.Function();

    // Getting the ID of the process making the calls on feature manager. This ID is used

    // for the addition, deletion, setting, enabling, and disabling functions.

    TUint processId = 0;	// default value for a process id

    TInt getIdErr = KErrGeneral;

    if( msgCmd >= EFeatMgrEnableFeature && msgCmd <= EFeatMgrSWIEnd )

    	{

	    RThread thread;

	    getIdErr = aMessage.Client(thread, EOwnerProcess);

	    if( getIdErr == KErrNone)

	    	{

		    RProcess process;

		    getIdErr = thread.Process(process);

		    if( getIdErr == KErrNone)

		    	{

		    	TProcessId prcId = process.Id();

		    	processId = TUint(prcId.Id());

		    	}

	    	}

    	}

    // Check command code and call appropriate function

    switch ( msgCmd )

        {

    	case EFeatMgrFeatureSupported:

    	    {

    	    TFeatureEntry feature;

    	    TPckg<TFeatureEntry> pckg( feature );

    	    aMessage.ReadL( 0, pckg );

    	    TFeatureServerEntry feat( feature );

    	    TInt supported = iRegistry.IsFeatureSupported( feat );

    	    // Construct entry for passing back to client.

    	    TFeatureEntry featBack( feat.FeatureUid(), feat.FeatureFlags(), feat.FeatureData() );

    	    TPckgC<TFeatureEntry> pckgBack( featBack );

            TPckgC<TInt> resPckg( supported );

            aMessage.WriteL( 0, pckgBack );

            aMessage.WriteL( 1, resPckg );

    	    break;

    	    }

        case EFeatMgrFeaturesSupported:

    	    {

        	TInt count( aMessage.Int0() );

        	TInt responseCount( 0 );

        	RFeatureArray temp;

        	CleanupClosePushL( temp );

        	temp.ReserveL( count );

            for ( TInt i = 0; i < count; i++ )

                {

                TFeatureEntry feature;

                TPckg<TFeatureEntry> pckg( feature );

                TInt offset = i * sizeof(TFeatureEntry);

                // Read feature entry and fetch entry status/data

                aMessage.ReadL( 1, pckg, offset );

                TFeatureServerEntry feat( feature );

                TInt supported = iRegistry.IsFeatureSupported( feat );

                // Non-existing and uninitialised feature entries are not returned.

                if( supported != KErrNotFound && supported != KErrNotReady )

                    {

                    responseCount++;

                    TFeatureEntry featBack( feat.FeatureUid(), feat.FeatureFlags(), 

                        feat.FeatureData() );

                    // Can't write to same slot before reading entries first

                    temp.AppendL( featBack );

                    }

                }

            // Write found entries back to client

            for ( TInt i = 0; i < responseCount; i++ )

                {

                TInt offset = i * sizeof(TFeatureEntry);

                TPckgC<TFeatureEntry> pckgBack( temp[i] );

                aMessage.WriteL( 1, pckgBack, offset );

                }

            CleanupStack::PopAndDestroy( &temp );

            // Write number of found entries back to client

            TPckgC<TInt> resPckg( responseCount );

            aMessage.WriteL( 2, resPckg );

    	    break;

    	    }

        case EFeatMgrNumberOfSupportedFeatures:

    	    {

    	    TInt count = iRegistry.NumberOfSupportedFeatures();

            TPckgC<TInt> resPckg( count );

            aMessage.WriteL( 0, resPckg );

    	    break;

    	    }

    	case EFeatMgrListSupportedFeatures:

    	    {   

            RFeatureUidArray supportedFeatures;

            CleanupClosePushL( supportedFeatures );

            iRegistry.SupportedFeaturesL( supportedFeatures );

            TInt count( supportedFeatures.Count() );

            if ( aMessage.Int0() == count )

                {

                for ( TInt i = 0; i < count; i++ )

                    {

                    TPckg<TUid> pckg( supportedFeatures[i] );

                    TInt offset = i * sizeof(TUid);

                    aMessage.WriteL( 1, pckg, offset );

                    }

                CleanupStack::PopAndDestroy( &supportedFeatures );

                }

            else

                {

                CleanupStack::PopAndDestroy( &supportedFeatures );

                User::Leave( KErrServerBusy );

                }

         	break;

    	    }

    	case EFeatMgrEnableFeature:

    	    {

    	    if( getIdErr == KErrNone )

    	    	{

	    	    TUid feature = TUid::Uid(aMessage.Int0());

	    	    getIdErr = iRegistry.SetFeature( feature, EFeatureSupportEnable, NULL, processId );

    	    	}

    	    TPckgC<TInt> resPckg( getIdErr );

	        aMessage.WriteL( 1, resPckg );

	        break;

    	    }

  		case EFeatMgrDisableFeature:

    	    {

    	    if( getIdErr == KErrNone )

    	    	{

	    	    TUid feature = TUid::Uid(aMessage.Int0());

	    	    getIdErr = iRegistry.SetFeature( feature, EFeatureSupportDisable, NULL, processId );

    	    	}    	    

            TPckgC<TInt> resPckg( getIdErr );

            aMessage.WriteL( 1, resPckg );

    	    break;

    	    }

        case EFeatMgrAddFeature:

    	    {

    	    if( getIdErr == KErrNone)

    	    	{

    	    	TFeatureEntry feature;

        	    TPckg<TFeatureEntry> pckg( feature );

        	    aMessage.ReadL( 0, pckg );

        	    TFeatureServerEntry feat( feature );

        	    getIdErr = iRegistry.AddFeature( feat, processId );

    	    	}    	    

            TPckgC<TInt> resPckg( getIdErr );

            aMessage.WriteL( 1, resPckg );

    	    break;

    	    }

        case EFeatMgrDeleteFeature:

    	    {

    	    if( getIdErr == KErrNone)

    	    	{

    	    	TUid feature = TUid::Uid(aMessage.Int0());

    	    	getIdErr = iRegistry.DeleteFeature( feature, processId );

    	    	}

    	    TPckgC<TInt> resPckg( getIdErr );

            aMessage.WriteL( 1, resPckg );

    	    break;

    	    }

        case EFeatMgrSetFeatureAndData:

    	    {

    	    if( getIdErr == KErrNone)

    	    	{

    	    	TUid feature = TUid::Uid(aMessage.Int0());

	    	    TBool enable = aMessage.Int1();

	    	    TUint32 data = aMessage.Int2();

	    	    getIdErr = iRegistry.SetFeature( feature, enable, &data, processId );

    	    	}

    	    TPckgC<TInt> resPckg( getIdErr );

            aMessage.WriteL( 3, resPckg );

    	    break;

    	    }

        case EFeatMgrSetFeatureData:

    	    {

    	    if( getIdErr == KErrNone)

    	    	{

    	    	TUid feature = TUid::Uid(aMessage.Int0());

	    	    TUint32 data = aMessage.Int1();

	    	    getIdErr = iRegistry.SetFeature( feature, EFeatureSupportUntouch, &data, processId );

    	    	}

    	    TPckgC<TInt> resPckg( getIdErr );

            aMessage.WriteL( 2, resPckg );

    	    break;

    	    }

        case EFeatMgrReqNotify:

    	    {

    	    // When client requests notification for feature, it could be checked

    	    // whether feature exists at all and even whether feature modifiable,

    	    // i.e. could request ever cause notification. If this will be done, 

    	    // remember document error codes in API documentation.

    	    // Message is needed for later signaling of client upon feature change.

    	    if( iNotifyMessage.IsNull() ) 

    	        {

    	        iNotifyMessage = aMessage;

    	        }

    	    else

    	        {

    	        PanicClient( aMessage, EPanicNotifyRequest );

    	        }

    	    break;

    	    }

        case EFeatMgrReqNotifyUids:

    	    {

    	    // When client requests notification for features, it could be checked

    	    // whether features exists at all and even whether features modifiable,

    	    // i.e. could request ever cause notification. If this will be done, 

    	    // remember document error codes in API documentation.

    	    TInt err( KErrNone );

        	// Fetch transfer buffer from client

        	TInt count( aMessage.Int0() );

        	err = iNotifyFeatures.Reserve( count );

        	if( err == KErrNone )

        	    {

                for ( TInt i = 0; i < count; i++ )

                    {

                    TUid feature;

                    TPckg<TUid> pckg( feature );

                    TInt offset = i * sizeof(TUid);

                    aMessage.ReadL( 1, pckg, offset );

                    err = iNotifyFeatures.Append( feature );

                    if( err != KErrNone )

                        {

                        break;

                        }

                    }

        	    }

            TPckgC<TInt> resPckg( err );

            aMessage.WriteL( 2, resPckg );

    	    break;

    	    }

        case EFeatMgrReqNotifyCancel:

    	    {

    	    TUid feature = TUid::Uid(aMessage.Int0());

    	    TInt index( iNotifyFeatures.Find( feature ) );

    	    TInt err( KErrNotFound );

    	    if( index != KErrNotFound )

    	        {

    	        err = KErrNone;

    	        iNotifyFeatures.Remove( index );

    	        }

    	    // If no more features to be notified, complete request.

    	    if( !iNotifyFeatures.Count() 

    	        && iNotifyMessage.IsNull() == EFalse)

    	        {

    	        iNotifyMessage.Complete( KErrCancel );

    	        }

            TPckgC<TInt> resPckg( err );

            aMessage.WriteL( 1, resPckg );

    	    break;

    	    }

        case EFeatMgrReqNotifyCancelAll:

    	    {

    	    iNotifyFeatures.Reset();

    	    if( iNotifyMessage.IsNull() == EFalse )

    	        {

    	        iNotifyMessage.Complete( KErrCancel );

    	        }

            TPckgC<TInt> resPckg( KErrNone );

            aMessage.WriteL( 0, resPckg );

    	    break;

    	    }