/*

* Copyright (c) 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:  Part of SyncML Data Synchronization Plug In Adapter

*

*/

#include <hash.h>

#include <utf.h>

#include <cntitem.h>

#include "snapshotitem.h"

#include "logger.h"

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

// TSnapshotItem::TSnapshotItem

// C++ default constructor can NOT contain any code, that might leave

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

TSnapshotItem::TSnapshotItem() : TNSmlSnapshotItem()

    {

    }

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

// TSnapshotItem::TSnapshotItem

// Constructor, takes item id as a parameter

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

TSnapshotItem::TSnapshotItem( const TSmlDbItemUid& aItemId,

    const TSmlDbItemUid& aParent )

: TNSmlSnapshotItem( aItemId )

    {

    SetParentId( aParent );

    }

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

// TSnapshotItem::ExternalizeL

// Writes the contents of this class and it's base to stream

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

void TSnapshotItem::ExternalizeL( RWriteStream& aStream ) const

    {

    TNSmlSnapshotItem::ExternalizeL( aStream );

    TPckgBuf<THashValue> nameBuf(iHash);

	aStream << nameBuf;

    }

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

// TSnapshotItem::InternalizeL

// Reads the contents of this class and it's base from stream

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

void TSnapshotItem::InternalizeL( RReadStream& aStream )

    {

    TNSmlSnapshotItem::InternalizeL( aStream );

    TPckgBuf<THashValue> nameBuf;

	aStream >> nameBuf;

	iHash = nameBuf();

    }

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

// TSnapshotItem::CreateHashL

// Create hash value from group content

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

void TSnapshotItem::CreateHashL( CContactGroup& aGroup )

    {

    CMessageDigest* hash = CMessageDigestFactory::NewDigestLC( CMessageDigest::EMD5 );

    if ( aGroup.HasItemLabelField() )

        {

        TPtrC label = aGroup.GetGroupLabelL();

        HBufC8* tempBuf = CnvUtfConverter::ConvertFromUnicodeToUtf8L( label );

        CleanupStack::PushL( tempBuf );

        hash->Update( tempBuf->Des() );

        CleanupStack::PopAndDestroy( tempBuf );

        }

    // Create text field from items on group

    CContactIdArray* contactsIdArray = aGroup.ItemsContainedLC();

    const TInt idBufferMaxSize( 400 );

    HBufC8* tempIdBuf = HBufC8::NewLC( idBufferMaxSize );

    TPtr8 tempId = tempIdBuf->Des();

    const TInt KMaxNumLength(5);

    if ( contactsIdArray ) // this is NULL if there are no objects

        {

        tempId.AppendNum( contactsIdArray->Count(), EHex );

        for (TInt i=0; i< contactsIdArray->Count(); i++ )

            {

            if ( tempId.Length()+KMaxNumLength > tempId.MaxLength() )

                {

                // buffer is almost full, don't add any new items

                LOGGER_WRITE("buffer full");

                break;

                }

            // add item id

            tempId.AppendNum( (*contactsIdArray)[i] , EHex );

            }

        }

    else

        {

        tempId.AppendNum( 0 );

        }

    // update hash

    hash->Update( tempId );

    iHash.Copy( hash->Final() );

    CleanupStack::PopAndDestroy( tempIdBuf );

    CleanupStack::PopAndDestroy( contactsIdArray );

    CleanupStack::PopAndDestroy( hash );

    }

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

// TSnapshotItem::Hash

// Gets Hash

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

const TDesC8& TSnapshotItem::Hash() const

    {

    return iHash;

    }