/*

* 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:    Title fetcher

*

*/

// INCLUDE FILES

#include "glxtitlefetcher.h"

#include <mpxcollectionpath.h>

#include <mpxmediageneraldefs.h>

#include <mglxmedialist.h>

#include <glxattributecontext.h>

#include <glxuistd.h>

#include "glxlog.h"

#include "glxtracer.h"

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

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

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

// might leave.

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

//

CGlxTitleFetcher::CGlxTitleFetcher(MGlxTitleFetcherObserver& aObserver,

                        CMPXCollectionPath* aPath) :

   iObserver(aObserver), iPath(aPath)

    {

    TRACER("CGlxTitleFetcher::CGlxTitleFetcher");

    }

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

// Symbian 2nd phase constructor can leave.

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

// 

void CGlxTitleFetcher::ConstructL()

    {

    TRACER("CGlxTitleFetcher::ConstructL");

    // Go back one level to obtain the ID

    iPathId = iPath->Id();

    // Go back another level from which to create a media list containing 

    // this path

    if(iPath->Levels() > 0)

    	{

		iPath->Back();

    	}

    iBackMediaList = MGlxMediaList::InstanceL(*iPath);

    /// @todo: This idSpaceId must be calculated properly

    TGlxIdSpaceId idSpaceId = iBackMediaList->IdSpaceId(0);

    TGlxMediaId id(iPathId);

    TBool requestAttributes = ETrue;

    TInt index = iBackMediaList->Index(idSpaceId, id);

    if ( index != KErrNotFound )

        {

        const TGlxMedia& item = iBackMediaList->Item(index);

    	const CGlxMedia* media = item.Properties();

    	// get the Title from the attribute if it is already present

    	if (media && media->IsSupported(KMPXMediaGeneralTitle)

    	    && index != KErrNotFound)

    		{

            const TDesC&  title = media->ValueText(KMPXMediaGeneralTitle);

            // notify the observer		

            iObserver.HandleTitleAvailableL(title); 

            requestAttributes = EFalse;

    		}

    	}

    if ( requestAttributes )

	    {

        // Otherwise add a context setting range to cover all items

        iContext = CGlxDefaultAttributeContext::NewL();

        iContext->SetRangeOffsets(10000,10000);

        iContext->AddAttributeL(KMPXMediaGeneralTitle);

        // Add the context at a high priority

        iBackMediaList->AddContextL( iContext,

                                     KGlxFetchContextPriorityTitleFetcher );

        // Set self as observer

        iBackMediaList->AddMediaListObserverL(this);

	    }

	}

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

// Two-phased constructor.

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

//

CGlxTitleFetcher* CGlxTitleFetcher::NewL(MGlxTitleFetcherObserver& aObserver,

                        CMPXCollectionPath* aPath)

    {

    CGlxTitleFetcher* self = new (ELeave) CGlxTitleFetcher(aObserver, aPath);

    CleanupStack::PushL(self);

    self->ConstructL();

    CleanupStack::Pop(self);

    return self;

    }

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

// Destructor

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

//

CGlxTitleFetcher::~CGlxTitleFetcher()

    {

    TRACER("CGlxTitleFetcher::~CGlxTitleFetcher ()");

    if(iBackMediaList)

        {

        if(iContext)

            {

            iBackMediaList->RemoveContext(iContext);

            delete iContext;

            }

        iBackMediaList->RemoveMediaListObserver(this);           

		iBackMediaList->Close();

        }

    }

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

// CGlxTitleFetcher::HandleItemAddedL

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

//

void CGlxTitleFetcher::HandleItemAddedL(TInt aStartIndex, TInt aEndIndex,

        MGlxMediaList* aList)  

    {    

    TRACER("CGlxTitleFetcher::HandleItemAddedL ()");

    if(aList == iBackMediaList)

           {

           for(TInt index = aStartIndex;index <= aEndIndex;index++)

           // Is it the item (path) that we want

               {

               if(aList->Item(index).Id().Value() == (TUint32)iPathId)

                       {

                       const TGlxMedia& item = aList->Item(index);

                       const CGlxMedia* media = item.Properties();

                       // get the Title from the attribute

                       if (media && media->IsSupported(KMPXMediaGeneralTitle))

                           {

                           const TDesC&  title = media->ValueText(KMPXMediaGeneralTitle);

                           // notify the observer      

                           iObserver.HandleTitleAvailableL(title); 

                           iBackMediaList->RemoveContext(iContext);

                           delete iContext;

                           iContext = NULL;                

                           }

                       }

                }

           }

    }

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

// CGlxTitleFetcher::HandleAttributesAvailableL

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

//

void CGlxTitleFetcher::HandleAttributesAvailableL(TInt aItemIndex, 	

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

    {

    TRACER("CGlxTitleFetcher::HandleAttributesAvailableL ()");

    // Is it the list that we want    

    if(aList == iBackMediaList)

        {

        // Is it the item (path) that we want

        if(aList->Item(aItemIndex).Id().Value() == (TUint32)iPathId)

            {

            const TGlxMedia& item = aList->Item(aItemIndex);

			const CGlxMedia* media = item.Properties();

			// get the Title from the attribute

			if (media && media->IsSupported(KMPXMediaGeneralTitle))

				{

                const TDesC&  title = media->ValueText(KMPXMediaGeneralTitle);

	            // notify the observer		

                iObserver.HandleTitleAvailableL(title); 

                iBackMediaList->RemoveContext(iContext);

                delete iContext;

                iContext = NULL;

				}

            }

        }

    }

//  End of File