/*

* Copyright (c) 2007 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:   Implements an observer to CPS

*

*/

// INCLUDE FILES

#include <liwcommon.h>

#include <liwservicehandler.h>

#include <liwvariant.h>

#include <liwgenericparam.h>

#include "cpsobserver.h"

#include "cpswrapper.h"

#include "cpsconst.h"

namespace cpswrapper

    {

	// =============================================================================

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

	// Cleanup utility for RPointerArray

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

	//

	static void DoCleanup( TAny* aPtr )

		{

		__ASSERT_DEBUG( aPtr, User::Invariant() );

		static_cast< RCriteriaArray* >( aPtr )->ResetAndDestroy();

		}

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

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

	// Constructor

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

	//

	CCpsObserver::CCpsObserver( CCpsWrapper* aCpsWrapper )

		: iCpsWrapper( aCpsWrapper )

		{

		}

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

	// Two-phased constructor.

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

	//

	CCpsObserver* CCpsObserver::NewLC( CCpsWrapper* aCpsWrapper )

		{

		CCpsObserver* self( 

			new( ELeave ) CCpsObserver( aCpsWrapper ) );

		CleanupStack::PushL( self );

		self->ConstructL();

		return self;

		}

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

	// Destructor

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

	//

	CCpsObserver::~CCpsObserver()

		{

	    TRAP_IGNORE( ReleaseL() );	    

		ReleaseLiw();

		}

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

	// Symbian 2nd phase constructor can leave.

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

	//

	void CCpsObserver::ConstructL()

		{

		InitLiwL();

		}

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

	// CCpsObserver::HandleNotifyL

	//

	// Handles Published content notification

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

	//

	TInt CCpsObserver::HandleNotifyL( 

		TInt /*aErrorCode */, 

		TInt /*aEventId*/,

		CLiwGenericParamList& aEventParamList, 

		const CLiwGenericParamList& /*aInParamList*/ )

		{

	    TInt pos( 0 );

		aEventParamList.FindFirst( pos, KChangeInfo );

		if ( pos != KErrNotFound )

			{

			// Get list of maps

			TLiwVariant variant( (aEventParamList)[pos].Value() );

			variant.PushL();

			const CLiwList* changeMapsList( variant.AsList() );

			// Iter through list content

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

				{

				TLiwVariant changeMap;

				changeMap.PushL();

				if ( changeMapsList->AtL( i, changeMap ) )

					{

					const CLiwMap* map = changeMap.AsMap();

					if ( map->FindL( KContentType, changeMap ) )

						{

						HBufC* publisher = NULL;

						HBufC* contentType = NULL;

						contentType = changeMap.AsDes().AllocLC();

						if ( KHSTemplate() == contentType &&

							 map->FindL( KPublisher, changeMap ) )

							{

                            publisher = changeMap.AsDes().AllocLC();

                            if ( map->FindL( KOperation, changeMap ) )

                                {

                                HBufC* operation = changeMap.AsDes().AllocLC();

                                // unregitered publisher's widget

                                // from home screen if exist or add

                                // new widget to widgetmanager

                                iCpsWrapper->HandleChangedPublisherL( *publisher,

                                        *operation );

                                CleanupStack::PopAndDestroy( operation );

                                }

							CleanupStack::PopAndDestroy( publisher );

							}

						else if( KWRTTemplate() == contentType  &&

								  map->FindL( KContentId, changeMap ) )

							 {

                             publisher = changeMap.AsDes().AllocLC();

                             if ( map->FindL( KOperation, changeMap ) )

                                 {

                                 HBufC* operation = changeMap.AsDes().AllocLC();

                                 // unregitered publisher's widget

                                 // from home screen if exist or add

                                 // new widget to widgetmanager

                                 iCpsWrapper->HandleChangedPublisherL( *publisher,

                                         *operation );

                                 CleanupStack::PopAndDestroy( operation );

                                 }

                             CleanupStack::PopAndDestroy( publisher );

							 }

						CleanupStack::PopAndDestroy( contentType );

						}

					}

				CleanupStack::PopAndDestroy( &changeMap );

				}

			CleanupStack::PopAndDestroy( &variant );

			}

		return KErrNone;

		}

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

	// CCpsObserver::RegisterL

	//

	// Register for notifications

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

	//

	void CCpsObserver::RegisterL( CLiwDefaultMap* aFilter, const TDesC& aRegistry )

		{

		CLiwGenericParamList* inParamList( CLiwGenericParamList::NewLC() );

		CLiwGenericParamList* outParamList( CLiwGenericParamList::NewLC() );

		// Fill in input list for RequestNotification command

		inParamList->AppendL(TLiwGenericParam(KType,TLiwVariant( aRegistry )));

		inParamList->AppendL(TLiwGenericParam(KFilter ,TLiwVariant( aFilter )));

		iInterface->ExecuteCmdL( KRequestNotification,  *inParamList,

											 *outParamList, 0, this );

		CleanupStack::PopAndDestroy( outParamList );

		CleanupStack::PopAndDestroy( inParamList ); 

		}

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

	// CCpsObserver::ReleaseL

	//

	// Sing off to notification

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

	//

	void CCpsObserver::ReleaseL()

		{

		if( iInterface )

			{

			CLiwGenericParamList* inParamList = CLiwGenericParamList::NewL();

			CleanupStack::PushL( inParamList );

			CLiwGenericParamList* outParamList = CLiwGenericParamList::NewL();

			CleanupStack::PushL( outParamList );

			iInterface->ExecuteCmdL( KRequestNotification, *inParamList, *outParamList,

													 KLiwOptCancel, this );

			CleanupStack::PopAndDestroy( outParamList );

			CleanupStack::PopAndDestroy( inParamList );

			}

		}

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

	// CCpsObserver::InitLiwL

	//

	// Init LIW interface.

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

	void CCpsObserver::InitLiwL()

		{

		if ( !iLiwHandler )

			{

			TInt error( KErrNone );

			CLiwGenericParamList* in( NULL );

			CLiwGenericParamList* out( NULL );

			CLiwCriteriaItem* criterion( NULL );

			RCriteriaArray array( 1 );

			TCleanupItem cleanup( DoCleanup, &array );

			CleanupStack::PushL( cleanup );

			// Do the basic initialization.

			iLiwHandler = CLiwServiceHandler::NewL();

			// Get iCPSIface.

			in = CLiwGenericParamList::NewLC();

			out = CLiwGenericParamList::NewLC();

			criterion = CLiwCriteriaItem::NewL( 

				KLiwCmdAsStr,

				KCPSConfigurationIf, 

				KCPS );

			error = array.Append( criterion );

			if ( error )

				{

				delete criterion; 

				criterion = NULL;

				User::Leave( error );

				}

			criterion->SetServiceClass( TUid::Uid( KLiwClassBase ) );

			iLiwHandler->AttachL( array );

			iLiwHandler->ExecuteServiceCmdL( *criterion, *in, *out ); 

			out->FindFirst( error, KCPSConfigurationIf );

			User::LeaveIfError( error );

			iInterface = (*out)[ error ].Value().AsInterface();

			CleanupStack::PopAndDestroy( 3 );

			}

		}

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

	// CCpsObserver::ReleaseLiw

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

	//

	void CCpsObserver::ReleaseLiw()

		{    

		if ( iInterface )

			{

			iInterface->Close();

			iInterface = NULL;

			}

		delete iLiwHandler;

		iLiwHandler = NULL;

		}

}

 //  End of File