/*

* Copyright (c) 2008-2009 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:    CGlxContainerListBinding This class holds the list of 

*                 tags/albums associated with a media item

*

*/

#include "glxcontainerlistbinding.h"        // his class holds the list of tags/albums associated with a media item

#include <glxfilterfactory.h>        		// for TGlxFilterFactory

#include <glxuistd.h>                       // for attribute priority

#include <mul/mulvisualitem.h>              // Client need to use this class to add data in data model       

using namespace Alf;

//CONSTANTS

const TInt  KTagMediaListId = 0x2000D248;

const TInt  KRangeOffset = 50;

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

// NewL

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

//

CGlxContainerListBinding* CGlxContainerListBinding::NewL( const Alf::mulvisualitem::TVisualAttribute& aMulTag /*const char* const

        aMulTag*/, const CMPXCollectionPath& aPath )

	{

	CGlxContainerListBinding* self = CGlxContainerListBinding::NewLC( aMulTag, aPath);

	CleanupStack::Pop( self );

	return self;

	}

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

// NewLC

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

//	

CGlxContainerListBinding* CGlxContainerListBinding::NewLC( const Alf::mulvisualitem::TVisualAttribute& aMulTag /*const char* const

        aMulTag*/, const CMPXCollectionPath& aPath )

	{

	CGlxContainerListBinding* self = new ( ELeave ) CGlxContainerListBinding();

	CleanupStack::PushL( self );

	self->ConstructL( aMulTag, aPath );

	return self;

	}

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

// ConstructL

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

//

void CGlxContainerListBinding::ConstructL( const Alf::mulvisualitem::TVisualAttribute& aMulTag /*const char* const aMulTag*/, 

        const CMPXCollectionPath& aPath )

	{

	CGlxSingleTagBinding::BaseConstructL( aMulTag );

	iContainerPath = CMPXCollectionPath::NewL( aPath );

	// attributes for Title of tags and albums

	iFetchContext = CGlxDefaultAttributeContext::NewL();

	iFetchContext->AddAttributeL( KMPXMediaGeneralTitle );

	iFetchContext->SetRangeOffsets(KRangeOffset,KRangeOffset);

	}

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

// Destructor

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

//

CGlxContainerListBinding::~CGlxContainerListBinding()

	{

	CloseMediaList();

	}

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

// PopulateT

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

//

void CGlxContainerListBinding::PopulateT( Alf::MulVisualItem& aItem,

        const TGlxMedia& aMedia, TBool /*aIsFocused*/, TInt /*aTextureId*/  ) const

	{

    const TInt KCommaLength = 2;

    _LIT(KComma,",");

    //T is used for throws as per C++ standard.Hence used instead of "L"

    //Ignoring this for code scanner warnings - Leaving functions called in non-leaving functions.

	if(!iContainerList)

		{

		CreateMediaListL( aMedia.Id() );

		}

	if( iContainerList )

		{

		CGlxUStringConverter* stringConverter = CGlxUStringConverter::NewL();

		CleanupStack::PushL(stringConverter );

		TInt tagListcount = iContainerList->Count();

		//if tags count is grater than 1 then display tags saperated by comma

		if( tagListcount > 0 )

			{

			HBufC* stringBuffer = NULL;

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

				{

				HBufC* string = NULL;

				stringConverter->AsStringL( iContainerList->Item(i),    

				    KMPXMediaGeneralTitle, NULL, string );

				if( string )

					{

					if( stringBuffer )

					    {

					    stringBuffer = stringBuffer->ReAlloc( stringBuffer->Length() +  string->Length() );

					    stringBuffer->Des().Append ( string->Des() );

					    }

					if( !stringBuffer )

					    {

	   				    stringBuffer = string->Alloc();

					    }

				    delete string;

				    string = NULL;

					}

				if( i < tagListcount -1 )

					{

			    	if( stringBuffer )

			    	    {

    					stringBuffer = stringBuffer->ReAlloc( stringBuffer->Length() +  KCommaLength );

    					stringBuffer->Des().Append( KComma );

			    	    }

					}

				}

			if( stringBuffer )

			    {

    			aItem.SetAttribute( MulTag(), *stringBuffer );

    			delete stringBuffer;

    			stringBuffer = NULL;

			    }

			}

		else

			{		

			aItem.SetAttribute( MulTag(), _L("") );

			}

		CleanupStack::PopAndDestroy(stringConverter );

		}

}

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

// CreateMediaListL

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

//

void CGlxContainerListBinding::CreateMediaListL(TGlxMediaId aMediaId) const

    {

    //create filter that excludes all containers that do not contain the specified item

    CMPXFilter* itemFilter  = TGlxFilterFactory::CreateExcludeContainersWithoutItemFilterL( aMediaId );

    CleanupStack::PushL(itemFilter);

    TGlxFilterProperties filterProperty;

    filterProperty.iSortOrder = EGlxFilterSortOrderAlphabetical;

    filterProperty.iSortDirection = EGlxFilterSortDirectionAscending;

    //creates a combined filter, items will be sorted by the filters specified

    CMPXFilter* filter  = TGlxFilterFactory::CreateCombinedFilterL( filterProperty,

                                                                        itemFilter, EFalse);

    CleanupStack::PushL(filter); 

    //create media list

    iContainerList = MGlxMediaList::InstanceL( *iContainerPath, TGlxHierarchyId(KTagMediaListId), filter );

    iContainerList->AddContextL( iFetchContext, KGlxFetchContextPriorityNormal );

    iContainerList->AddMediaListObserverL( const_cast<CGlxContainerListBinding*>(this));

    CleanupStack::PopAndDestroy(filter);

    CleanupStack::PopAndDestroy(itemFilter);

    }

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

// CloseMediaListL

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

//

void CGlxContainerListBinding::CloseMediaList()

    {

    if(iContainerList)

        {

        iContainerList->RemoveMediaListObserver( this );

		if (iFetchContext)

			{

			iContainerList->RemoveContext( iFetchContext );

			delete iFetchContext;

			iFetchContext = NULL;

			}

        iContainerList->Close();

        }

    if (iContainerPath)

		{

		delete iContainerPath;

		iContainerPath= NULL;

		}

    }

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

// HandleItemAddedL

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

//

void CGlxContainerListBinding::HandleItemAddedL( TInt /*aStartIndex*/, TInt /*aEndIndex*/, 

        MGlxMediaList* /*aList*/ )

    {

    //No implementation

    }

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

// HandleItemRemovedL

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

//

void CGlxContainerListBinding::HandleItemRemovedL( TInt /*aStartIndex*/, 

        TInt /*aEndIndex*/, MGlxMediaList* /*aList*/ )

    {

    //No implementation    

    }

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

// HandleAttributesAvailableL

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

//

void CGlxContainerListBinding::HandleAttributesAvailableL( TInt /*aItemIndex*/, 

    const RArray<TMPXAttribute>& /*aAttributes*/, MGlxMediaList* aList )

	{

	if( aList == iContainerList )

		{

		Update();

		}

	}

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

// HandleFocusChanged

// checks whether the focus has changed,returns the response status 

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

//  

CGlxBinding::TResponse CGlxContainerListBinding::HandleFocusChanged( 

        TBool /*aIsGained*/ )

    {

    //need to remove once bug ESPK-7G6GJX is fixed

    return ENoUpdateNeeded ;

    }

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

// HandleFocusChangedL

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

//

void CGlxContainerListBinding::HandleFocusChangedL( NGlxListDefs::TFocusChangeType /*aType*/, 

        TInt /*aNewIndex*/, TInt /*aOldIndex*/, MGlxMediaList* /*aList*/ )

    {

    //No implementation   

    }

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

// HandleItemSelectedL

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

//

void CGlxContainerListBinding::HandleItemSelectedL(TInt /*aIndex*/,

        TBool /*aSelected*/, MGlxMediaList* /*aList*/ ) 

    {

    //No implementation    

    }

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

// HandleMessageL

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

//

void CGlxContainerListBinding::HandleMessageL( const CMPXMessage& /*aMessage*/,

        MGlxMediaList* /*aList*/ ) 

    {

    //No implementation    

    }

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

// HandleMediaL

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

//

void CGlxContainerListBinding::HandleMediaL( TInt /*aListIndex*/,

        MGlxMediaList* /*aList*/ ) 

    {

    //No implementation    

    }

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

// HandleItemModifiedL

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

//

void CGlxContainerListBinding::HandleItemModifiedL( const RArray<TInt>& /*aItemIndexes*/,

        MGlxMediaList* /*aList*/ )

    {

    //No implementation    

    }