/*

* 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:      Resolver for remote items

*

*/

// INCLUDE FILES

// dlnasrv / mediaserver api

#include <upnpobject.h>

#include <upnpitem.h>

#include <upnpcontainer.h>

#include <upnpelement.h>

#include <upnpattribute.h>

#include <upnpdlnaprotocolinfo.h>

// dlnasrv / avcontroller api

#include "upnpavbrowsingsession.h" // browsing session

// dlnasrv / avcontroller helper api

#include "upnpresourceselector.h" // MUPnPResourceSelector

#include "upnpitemresolverobserver.h" // observer for this class

#include "upnpitemutility.h" // for ResourceFromItem

#include "upnpconstantdefs.h" // for browsing param: KSortNone

// dlnasrv / xmlparser api

#include "upnpxmlparser.h" // for xml parsing

// dlnasrv / avcontroller helper internal

#include "upnpremoteitemresolver.h"

_LIT( KComponentLogfile, "upnpavcontrollerhelper.txt");

#include "upnplog.h"

// CONSTANTS

// METHODS

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

// CUPnPRemoteItemResolver::NewL

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

CUPnPRemoteItemResolver* CUPnPRemoteItemResolver::NewL(

    const TDesC8& aItemId,

    MUPnPAVBrowsingSession& aHostSession,

    MUPnPResourceSelector& aSelector,

    const TDesC8& aBrowseFilter )

    {

    CUPnPRemoteItemResolver* self = new (ELeave) CUPnPRemoteItemResolver(

        aItemId, aHostSession, aSelector, aBrowseFilter );

    CleanupStack::PushL( self );

    self->ConstructL( aItemId, aHostSession, aSelector, aBrowseFilter );

    CleanupStack::Pop( self );

    return self;

    }

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

// CUPnPRemoteItemResolver::CUPnPRemoteItemResolver

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

CUPnPRemoteItemResolver::CUPnPRemoteItemResolver(

    const TDesC8& /*aItemId*/,

    MUPnPAVBrowsingSession& aHostSession,

    MUPnPResourceSelector& aSelector,

    const TDesC8& aBrowseFilter )

    : CUPnPAbstractBrowsingSessionObserver()

    , iBrowsingSession( aHostSession )

    , iSelector( aSelector )

    , iBrowseFilter( aBrowseFilter )

    {

    iState = EStateIdle;

    SetSession( aHostSession );

    }

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

// CUPnPRemoteItemResolver::ConstructL

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

void CUPnPRemoteItemResolver::ConstructL(

    const TDesC8& aItemId,

    MUPnPAVBrowsingSession& /*aHostSession*/,

    MUPnPResourceSelector& /*aSelector*/,

    const TDesC8& /*aBrowseFilter*/ )

    {

    iItemId = aItemId.AllocL();

    }

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

// CUPnPRemoteItemResolver::~CUPnPRemoteItemResolver

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

CUPnPRemoteItemResolver::~CUPnPRemoteItemResolver()

    {

    Cleanup();

    delete iItemId;

    iItemId = 0;

    }

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

// CUPnPRemoteItemResolver::ResolveL

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

void CUPnPRemoteItemResolver::ResolveL(

    MUPnPItemResolverObserver& aObserver, CUpnpAVDevice* /*aDevice*/ )

    {

    __LOG( "RemoteItemResolver:Resolve()" );

    __ASSERTD( iState == EStateIdle, __FILE__, __LINE__ );

    // enable receiving callbacks here

    EnableSessionObserver();

    // change state

    iObserver = &aObserver;

    iState = EStateActive;

    iRecursionDepth = 0;

    iBrowsingSession.BrowseL(

        iItemId->Des(), iBrowseFilter,

        MUPnPAVBrowsingSession::EMetadata,

        0, 1, KSortNone );

    }

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

// CUPnPRemoteItemResolver::Item

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

const CUpnpItem& CUPnPRemoteItemResolver::Item() const

    {

    __LOG( "RemoteItemResolver:item" );

    __ASSERTD( iState == EStateReady, __FILE__, __LINE__ );

    __ASSERTD( iFirstLevelItem, __FILE__, __LINE__ );

    return *iFirstLevelItem;

    }

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

// CUPnPRemoteItemResolver::Resource

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

const CUpnpElement& CUPnPRemoteItemResolver::Resource() const

    {

    __LOG( "RemoteItemResolver:Resource" );

    __ASSERTD( iState == EStateReady, __FILE__, __LINE__ );

    __ASSERTD( iResource, __FILE__, __LINE__ );

    return *iResource;

    }

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

// CUPnPRemoteItemResolver::BrowseResponse

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

void CUPnPRemoteItemResolver::BrowseResponse(

    const TDesC8& aBrowseResponse,

    TInt aError,

    TInt /*aMatches*/,

    TInt /*aTotalCount*/,

    const TDesC8& /*aUpdateId*/ )

    {

    __ASSERTD( iState == EStateActive, __FILE__, __LINE__ );

    __LOG1( "RemoteItemResolver:BrowseResponse(%d)", aError );

    // If the browse succeeded, parse the response and process the result

    if ( aError == KErrNone )

        {

        TRAP( aError, BrowseResponseL( aBrowseResponse ) );

        }

    // It the browse failed, or the parsing/processging of the response

    // failed, do complete.

    if( aError != KErrNone )

        {

        Complete( aError );

        }

    }

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

// CUPnPRemoteItemResolver::BrowseResponseL

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

//

void CUPnPRemoteItemResolver::BrowseResponseL( const TDesC8& aBrowseResponse )

    {

    __LOG( "RemoteItemResolver:BrowseResponseL" );

    // Status code

    TInt status = KErrNone;

    // Result array

    RPointerArray<CUpnpObject> array;

    // Create parser

    CUPnPXMLParser* parser = NULL;

    TRAP( status, parser = CUPnPXMLParser::NewL() );

    // If the parser was created succesfully...

    if( status == KErrNone )

        {

        CleanupStack::PushL( parser );

        // Parse the result data, and process the result object

        TRAP( status,

              parser->ParseResultDataL( array, aBrowseResponse );

              if(array.Count()!= 0 )

            	  ProcessResultObjectL( array[0] );

              else

            	  {

            	  //handle error no object

            	  Complete( KErrNotFound );

            	  }

            );

        // Clean up

        CleanupStack::PopAndDestroy( parser );

        parser = NULL;

        }

    // Empty, reset and close the array

    for( TInt i=0; i<array.Count(); i++ )

        {

        delete array[i];

        }

    array.Reset();

    array.Close();

    // If there was an error, forward the leave

    if( status != KErrNone )

        {

        User::Leave( status );

        }

    }

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

// CUPnPRemoteItemResolver::ProcessResultObjectL

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

void CUPnPRemoteItemResolver::ProcessResultObjectL(

    const CUpnpObject* aResult )

    {

    if ( aResult->ObjectType() != EUPnPItem )

        {

        User::Leave( KErrArgument );

        }

    // copy the item

    CUpnpItem* item = CUpnpItem::NewL();

    CleanupStack::PushL( item );

    item->CopyL( *aResult );

    // select the resource

    __LOG( "RemoteItemResolver:calling SelectResource" );

    const CUpnpElement& res =

        iSelector.SelectResourceL( *item );

    if ( iRecursionDepth == 0 )

        {

        __ASSERTD( !iFirstLevelItem, __FILE__, __LINE__ );

        CleanupStack::Pop( item );

        iFirstLevelItem = item;

        item = 0; // take ownership

        }

    HBufC8* recurringId = 0;

    if ( recurringId )

        {

        // continue recursion !

        ++iRecursionDepth;

        __LOG1( "RemoteItemResolver:ProcessResult - recur %d",

            iRecursionDepth );

        iBrowsingSession.BrowseL(

            recurringId->Des(), iBrowseFilter, 

            MUPnPAVBrowsingSession::EMetadata,

            0, 1, KSortNone );

        CleanupStack::PopAndDestroy( recurringId );

        }

    else

        {

        // finished browsing the item

        __ASSERTD( !iLastLevelItem, __FILE__, __LINE__ );

        __LOG( "RemoteItemResolver:ProcessResult - finished" );

        if ( iRecursionDepth > 0 )

            {

            // pointed object is DIFFERENT from first level object

            iLastLevelItem = CUpnpItem::NewL();

            iLastLevelItem->CopyL( *item );

            }

        iResource = &res;

        Complete( KErrNone );

        }

    if( item )

        {

        CleanupStack::PopAndDestroy( item );

        }

    }

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

// CUPnPRemoteItemResolver::Complete

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

void CUPnPRemoteItemResolver::Complete( TInt aError )

    {

    __ASSERTD( iState == EStateActive, __FILE__, __LINE__ );

    DisableSessionObserver();

    MUPnPItemResolverObserver& observer = *iObserver;

    iObserver = 0;

    if ( aError == KErrNone )

        {

        iState = EStateReady;

        }

    else

        {

        iState = EStateIdle;

        Cleanup();

        }

    observer.ResolveComplete( *this, aError );

    }

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

// CUPnPRemoteItemResolver::Cleanup

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

void CUPnPRemoteItemResolver::Cleanup()

    {

    DisableSessionObserver();

    if ( iState == EStateActive )

        {

        iBrowsingSession.CancelBrowse();

        }

    iObserver = 0;

    delete iFirstLevelItem;

    iFirstLevelItem = 0;

    delete iLastLevelItem;

    iLastLevelItem = 0;

    iResource = 0;

    iState = EStateIdle;

    }