/*

* 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 CNcdNodePreviewProxy class implementation

*

*/

#include <f32file.h>

#include "ncdnodepreviewproxy.h"

#include "ncdnodemetadataproxy.h"

#include "ncdnodeproxy.h"

#include "ncdoperationimpl.h"

#include "ncddownloadoperationproxy.h"

#include "ncdoperationmanagerproxy.h"

#include "catalogsclientserver.h"

#include "ncdnodeidentifier.h"

#include "ncdnodefunctionids.h"

#include "ncdnodeclassids.h"

#include "catalogsinterfaceidentifier.h"

#include "catalogsutils.h"

#include "catalogsdebug.h"

#include "ncdpanics.h"

#include "ncderrors.h"

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

CNcdNodePreviewProxy::CNcdNodePreviewProxy(

    MCatalogsClientServer& aSession,

    TInt aHandle,

    CNcdNodeMetadataProxy& aMetadata )

: CNcdInterfaceBaseProxy( aSession, aHandle, &aMetadata ),

  iMetadata( aMetadata )

    {

    }

void CNcdNodePreviewProxy::ConstructL()

    {

    // Register the interface

    MNcdNodePreview* interface( this );

    AddInterfaceL( 

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

    // Let this leave if internalization fails.

    InternalizeL();

    }

CNcdNodePreviewProxy* CNcdNodePreviewProxy::NewL(

    MCatalogsClientServer& aSession,

    TInt aHandle,

    CNcdNodeMetadataProxy& aMetadata )

    {

    CNcdNodePreviewProxy* self = 

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

    CleanupStack::Pop( self );

    return self;

    }

CNcdNodePreviewProxy* CNcdNodePreviewProxy::NewLC(

    MCatalogsClientServer& aSession,

    TInt aHandle,

    CNcdNodeMetadataProxy& aMetadata )

    {

    CNcdNodePreviewProxy* self = 

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

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

    CleanupStack::PushL( self );

    self->ConstructL();

    return self;

    }

CNcdNodePreviewProxy::~CNcdNodePreviewProxy()

    {

    // 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( MNcdNodePreview::KInterfaceUid );

    // Delete member variables here

    // Do not delete node and operation manager because

    // this object does not own them.

    iPreviewMimeTypes.ResetAndDestroy();

    }

CNcdNodeMetadataProxy& CNcdNodePreviewProxy::MetadataL() const

    {

    DLTRACEIN((""));

   if( IsObsolete() )

        {

        DLERROR(("Preview is obsolete.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

        User::Leave( KNcdErrorObsolete );

        }

    DLTRACEOUT((""));

    return iMetadata;

    }

void CNcdNodePreviewProxy::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(("Preview 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( MNcdNodePreview::KInterfaceUid );

        // Remove from the parent

        RemoveFromParent();

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

        // Register the interface

        MNcdNodePreview* interface( this );

        AddInterfaceL( 

            CCatalogsInterfaceIdentifier::NewL( interface, this, MNcdNodePreview::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((""));    

    }

TBool CNcdNodePreviewProxy::IsObsolete() const

    {

    return iObsolete;

    }

void CNcdNodePreviewProxy::SetObsolete( TBool aObsolete )

    {

    iObsolete = aObsolete;

    }    

void CNcdNodePreviewProxy::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::ENcdNodePreviewClassId )

        {

        // classId is not recognized

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

        // For testing purposes assert here

        DASSERT( EFalse );

        // Otherwise leave is adequate

        User::Leave( KErrCorrupt );

        }

    iPreviewCount = aStream.ReadInt16L();

    iPreviewMimeTypes.ResetAndDestroy();

    HBufC* previewMimeType = NULL;

    for( int i = 0; i < iPreviewCount; i++ )

        {

        InternalizeDesL( previewMimeType, aStream );

        CleanupStack::PushL( previewMimeType );

        iPreviewMimeTypes.Append( previewMimeType );

        CleanupStack::Pop( previewMimeType );

        previewMimeType = NULL;

        }

    DLTRACEOUT((""));

    }

TInt CNcdNodePreviewProxy::PreviewCount() const

    {

    return iPreviewCount;

    }

TBool CNcdNodePreviewProxy::IsPreviewLoadedL( TInt aIndex ) const

    {

    NCD_ASSERT_ALWAYS( 

        aIndex >= 0 && aIndex < PreviewCount(),

        ENcdPanicIndexOutOfRange );

    HBufC8* filenumber = IntToDes8LC( aIndex );

    TInt isLoaded;

    User::LeaveIfError(

        ClientServerSession().

            SendSync( NcdNodeFunctionIds::ENcdIsPreviewLoaded,

                      *filenumber,

                      isLoaded,

                      Handle()));

    CleanupStack::PopAndDestroy( filenumber );

    return isLoaded;

    }

const TDesC& CNcdNodePreviewProxy::PreviewMimeType( TInt aIndex ) const

    {

    NCD_ASSERT_ALWAYS( 

        aIndex >= 0 && aIndex < PreviewCount(),

        ENcdPanicIndexOutOfRange );

    return *iPreviewMimeTypes[aIndex];

    }

MNcdDownloadOperation* CNcdNodePreviewProxy::LoadPreviewL( TInt aIndex,

                                                           MNcdDownloadOperationObserver* aObserver )

    {

    DLTRACEIN((""));

    NCD_ASSERT_ALWAYS( 

        aIndex >= 0 && aIndex < PreviewCount(),

        ENcdPanicIndexOutOfRange );

    CNcdDownloadOperationProxy* download =

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

        CreateDownloadOperationL(

            ENcdPreviewDownload,

            MetadataL().Node(),

            KNullDesC,

            aObserver,

            aIndex );

    iOperationObserver = aObserver;

    DLTRACEOUT((""));

    return download;

    }

RFile CNcdNodePreviewProxy::PreviewFileL( TInt aIndex ) const

    {

    DLTRACEIN(( "aIndex: %i", aIndex ));

    NCD_ASSERT_ALWAYS( 

        aIndex >= 0 && aIndex < PreviewCount(),

        ENcdPanicIndexOutOfRange );

    // Convert index to a descriptor

    HBufC8* filenumber = IntToDes8LC( aIndex );

    /**

     * Add error handling, is it okay to leave here?

     */

    RFile fileHandle = ClientServerSession().SendSyncFileOpenL( 

        NcdNodeFunctionIds::ENcdPreviewOpenFile,

        *filenumber,        

        Handle());

    CleanupStack::PopAndDestroy( filenumber );

    DLTRACEOUT((""));

    return fileHandle;

    }

void CNcdNodePreviewProxy::DownloadProgress( MNcdDownloadOperation& /*aOperation*/,

    TNcdProgress /*aProgress*/ )

    {

    }

void CNcdNodePreviewProxy::QueryReceived( MNcdDownloadOperation& /*aOperation*/,

    MNcdQuery* /*aQuery*/ )

    {

    }

void CNcdNodePreviewProxy::OperationComplete( MNcdDownloadOperation& /*aOperation*/,

    TInt /*aError*/ )

    {

    DLTRACEIN((""));

    DLTRACEOUT((""));

    }