/*

* Copyright (c) 2006 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:   Contains CNcdNodeScreenshotProxy class implementation

*

*/

#include "ncdnodescreenshotproxy.h"

#include "ncdnodemetadataproxy.h"

#include "ncdnodeproxy.h"

#include "ncddownloadoperationproxy.h"

#include "ncdoperationmanagerproxy.h"

#include "ncdoperationdatatypes.h"

#include "catalogsclientserver.h"

#include "ncdnodeidentifier.h"

#include "ncdnodefunctionids.h"

#include "ncdnodeclassids.h"

#include "ncdpanics.h"

#include "catalogsinterfaceidentifier.h"

#include "catalogsutils.h"

#include "catalogsdebug.h"

#include "ncderrors.h"

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

CNcdNodeScreenshotProxy::CNcdNodeScreenshotProxy(

    MCatalogsClientServer& aSession,

    TInt aHandle,

    CNcdNodeMetadataProxy& aMetadata )

    : CNcdInterfaceBaseProxy( aSession, aHandle, &aMetadata ),

      iMetadata( aMetadata )

    {

    }

void CNcdNodeScreenshotProxy::ConstructL()

    {

    // Register the interface

    MNcdNodeScreenshot* interface( this );

    AddInterfaceL( 

        CCatalogsInterfaceIdentifier::NewL( interface, this, MNcdNodeScreenshot::KInterfaceUid ) );

    // Let this leave if the internalization fails.    

    InternalizeL();

    }

CNcdNodeScreenshotProxy* CNcdNodeScreenshotProxy::NewL(

    MCatalogsClientServer& aSession,

    TInt aHandle,

    CNcdNodeMetadataProxy& aMetadata )

    {

    CNcdNodeScreenshotProxy* self = 

        CNcdNodeScreenshotProxy::NewLC( aSession, aHandle, aMetadata );

    CleanupStack::Pop( self );

    return self;

    }

CNcdNodeScreenshotProxy* CNcdNodeScreenshotProxy::NewLC(

    MCatalogsClientServer& aSession,

    TInt aHandle,

    CNcdNodeMetadataProxy& aMetadata )

    {

    CNcdNodeScreenshotProxy* self = 

        new( ELeave ) CNcdNodeScreenshotProxy( aSession, aHandle, aMetadata );

    // Using PushL because the object does not have any references yet

    CleanupStack::PushL( self );

    self->ConstructL();

    return self;

    }

CNcdNodeScreenshotProxy::~CNcdNodeScreenshotProxy()

    {

    // Remove interfaces implemented by this class from the interface list.

    // So, the interface list is up to date when this class object is deleted.

    RemoveInterface( MNcdNodeScreenshot::KInterfaceUid );

    // Delete member variables here.

    // Do not delete node and operation manager because

    // this object does not own them.

    iScreenshotMimeType.ResetAndDestroy();

    }

CNcdNodeMetadataProxy& CNcdNodeScreenshotProxy::MetadataL() const

    {

    DLTRACEIN((""));

    if( IsObsolete() )

        {

        DLERROR(("Screenshot is obsolete. Metadata may not exist."));

        User::Leave( KNcdErrorObsolete );

        }

    DLTRACEOUT((""));

    return iMetadata;

    }

void CNcdNodeScreenshotProxy::InternalizeL()

    {

    DLTRACEIN((""));

    HBufC8* data( NULL );

    // Because we do not know the exact size of the data, use

    // the alloc method, which creates the buffer of the right size

    // and sets the pointer to point to the created buffer.

    // Get all the data that is necessary to internalize this object

    // from the server side.

    TInt error(

        ClientServerSession().

        SendSyncAlloc( NcdNodeFunctionIds::ENcdInternalize,

                       KNullDesC8,

                       data,

                       Handle(),

                       0 ) );

    if ( error == KNcdErrorObsolete )

        {

        DLINFO(("Screenshot was obsolete"));

        SetObsolete( ETrue );

        // Remove interfaces implemented by this class from the top parent interface list.

        // So, the interface list is up to date after this object is removed

        // from its top parent.

        RemoveInterface( MNcdNodeScreenshot::KInterfaceUid );

        // Remove from the parent

        RemoveFromParent();

        // Now update the interface for this object just in case somebody needs it.

        // Register the interface

        MNcdNodeScreenshot* interface( this );

        AddInterfaceL( 

            CCatalogsInterfaceIdentifier::NewL( interface, this, MNcdNodeScreenshot::KInterfaceUid ) );

        }

    else

        {

        // Just in case it was some times obsolete but not anymore

        SetObsolete( EFalse );

        }

    // If error occurred during data transfer, leave here and forward the error.

    User::LeaveIfError( error );

    if ( data == NULL )

        {

        DLERROR((""));

        User::Leave( KErrNotFound );

        }

    CleanupStack::PushL( data );

    // Read the data from the stream and insert it to the memeber variables

    RDesReadStream stream( *data );

    CleanupClosePushL( stream );

    InternalizeDataL( stream );

    // Closes the stream

    CleanupStack::PopAndDestroy( &stream ); 

    CleanupStack::PopAndDestroy( data );

    DLTRACEOUT((""));    

    }

// MNcdNodeScreenshot functions

TInt CNcdNodeScreenshotProxy::ScreenshotCount() const

    {

    return iScreenshotCount;

    }

const TDesC& CNcdNodeScreenshotProxy::ScreenshotMimeType( TInt aIndex ) const

    {

    NCD_ASSERT_ALWAYS( aIndex >= 0 && aIndex < ScreenshotCount(),

        ENcdPanicIndexOutOfRange );

    return *iScreenshotMimeType[aIndex];

    }

MNcdDownloadOperation* CNcdNodeScreenshotProxy::LoadScreenshotL(

    TInt aIndex,

    MNcdDownloadOperationObserver* aObserver )

    {

    DLTRACEIN((""));

    NCD_ASSERT_ALWAYS( aIndex >= 0 && aIndex < ScreenshotCount(),

        ENcdPanicIndexOutOfRange );

    CNcdDownloadOperationProxy* download =

        MetadataL().Node().OperationManager().

        CreateDownloadOperationL(

            ENcdScreenshotDownload,

            MetadataL().Node(),

            KNullDesC,

            aObserver,

            aIndex );

    DLTRACEOUT((""));

    return download;

    }

HBufC8* CNcdNodeScreenshotProxy::ScreenshotDataL( TInt aIndex ) const

    {

    NCD_ASSERT_ALWAYS( aIndex >= 0 && aIndex < ScreenshotCount(),

        ENcdPanicIndexOutOfRange );

    HBufC8* data( NULL );

    HBufC8* index = IntToDes8LC( aIndex );

    // Because we do not know the exact size of the data, use

    // the alloc method, which creates the buffer of the right size

    // and sets the pointer to point to the created buffer.

    User::LeaveIfError(

        ClientServerSession().

        SendSyncAlloc( NcdNodeFunctionIds::ENcdScreenshotData,

                       *index,

                       data,

                       Handle(),

                       0 ) );

    CleanupStack::PopAndDestroy( index );

    if ( data && data->Length() == 0 )

        {

        // If data does not contain any data, return NULL.

        delete data;

        return NULL;

        }

    return data;

    }

// Other functions

TBool CNcdNodeScreenshotProxy::IsObsolete() const

    {

    return iObsolete;

    }

void CNcdNodeScreenshotProxy::SetObsolete( TBool aObsolete )

    {

    iObsolete = aObsolete;

    }    

void CNcdNodeScreenshotProxy::InternalizeDataL( RReadStream& aStream )

    {

    DLTRACEIN((""));

    // Use catalogsutils.h functions to internalize

    // memebervariables according to the data received

    // from the server.

    // Make sure that the variables are set here in the same

    // order as they are externalized in the server side.

    // Small mistake here messes up everything!

    // First read the class id. Because, it is the first thing in the stream.

    TInt classId( aStream.ReadInt32L() );

    if ( classId != NcdNodeClassIds::ENcdNodeScreenshotClassId )

        {

        // classId is not recognized

        DLERROR(("Class id was not recognized!"));

        // For testing purposes assert here

        DASSERT( EFalse );

        // Otherwise leave is adequate

        User::Leave( KErrCorrupt );

        }

    iScreenshotCount = aStream.ReadInt32L();

    iScreenshotMimeType.ResetAndDestroy();

    // Set new values if screenshots exist.

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

        {

        HBufC* mimeType = NULL;

        InternalizeDesL( mimeType, aStream );

        CleanupStack::PushL( mimeType );

        iScreenshotMimeType.AppendL( mimeType );

        CleanupStack::Pop( mimeType );

        }

    DLTRACEOUT((""));

    }