/*

* Copyright (c) 2008 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:      Class for containing and obtaining music track-specific data

*                from media server

*

*/

// INCLUDES

#include <mpxmediaaudiodefs.h>

#include <mpxmediamusicdefs.h>

#include <mpxmediageneraldefs.h>

#include <mpxmedia.h>

#include <mpxattribute.h>

#include <mpxplaybackpluginobserver.h>

#include <mpxmessagegeneraldefs.h> // for messaging

#include <mpxplaybackmessagedefs.h> // for messaging

#include <escapeutils.h> // for unicode conversion

#include <upnpitem.h>

#include <upnpobject.h>

#include "upnpitemutility.h" // for FindElementByName & ResourceFromItemL

#include "upnpfileutility.h" // for IsFileProtectedL

#include "upnpconstantdefs.h" // browse filtering and item element names

#include <upnpdlnaprotocolinfo.h> // for resolving object mimetype

#include "upnpavcontroller.h"

#include "upnpavbrowsingsession.h"

#include "upnpavdevice.h"

#include "upnpavdevicelist.h"

#include "upnpitemresolverobserver.h" // MUPnPItemResolverObserver

#include "upnpitemresolverfactory.h" // factory class

#include "upnpitemresolver.h" // MUPnPItemResolver

#include "upnptrackobserver.h"

#include "upnptrack.h"

_LIT( KComponentLogfile, "musicplugins.txt");

#include "upnplog.h"

// CONSTANTS

_LIT16( KUPnPPrefix, "upnp:" );   // Prefix for separate local/remote song

const TInt KUPnPPrefixLength = 5;

const TInt KCharCodeColon = 58;

const TInt KCharCodeSeparate = 42;

const TInt InitialTrackDuration = 1;

_LIT( KTimeFormatYearOnly, "%F%Y" );

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

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

// CUPnPTrack::NewL

// 1st phase constructor.

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

//

CUPnPTrack* CUPnPTrack::NewL( MUPnPAVController& aAvController )

    {

    __LOG( "CUPnPTrack::NewL" );

    CUPnPTrack* self = new( ELeave ) CUPnPTrack( aAvController );

    return self;

    }

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

// CUPnPTrack::Delete

// deletor

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

//

void CUPnPTrack::Delete()

    {

    __LOG1( "CUPnPTrack::Delete, state=%d", iState );

    if ( iState == EStateResolving )

        {

        // asynchronous delete - will be deleted after

        // asynchronous operation is complete. This is because the

        // S60 command can not be cancelled

        iState = EStateSelfDestruct;

        }

    else

        {

        delete this;

        }

    }

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

// CUPnPTrack::CUPnPTrack

// Default constructor.

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

// 

CUPnPTrack::CUPnPTrack( MUPnPAVController& aAvController )

    : iAvController( aAvController )

    , iQueriedAttributes()

    {

    iBrowsingSession = NULL;

    iOriginalURI = NULL;

    iMediaServer = NULL;

    iObjectId = NULL;

    iTrackObserver = NULL;

    // Use initial duration value (1). It will guarantee that in

    // case were remote device does not support duration query and playback

    // is unpaused, SetPosition is called with real value even

    // if remote player does not return real value for getposition

    // call. Note that SetPosition(0) is used when user really wants

    // to move to track beginning.

    iTrackDuration = InitialTrackDuration;

    iIsItemSolved = EFalse;

    iState = EStateIdle;

    }

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

// CUPnPTrack::~CUPnPTrack

// destructor.

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

//

CUPnPTrack::~CUPnPTrack()

    {

    __LOG( "CUPnPTrack::~CUPnPTrack()" );

    StopBrowsingSession();

    // Free memory of owned members

    delete iOriginalURI;

    delete iMediaServer;        

    delete iObjectId;

    delete iItemResolver;

    iItemResolver = 0;

    __LOG( "CUPnPTrack::~CUPnPTrack End" );

    }

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

// CUPnPTrack::ResolveURIL

// Resolve local / remote URI.

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

//

void CUPnPTrack::ResolveURIL( const TDesC& aCodedTrackUri,

    MUPnPTrackObserver& aTrackObserver,

    TPlaybackDirection aPlaybackDirection )

    {  

    __LOG( "CUPnPTrack::ResolveURI" );

    delete iOriginalURI;

    iOriginalURI = 0;

    delete iMediaServer;

    iMediaServer = 0;

    delete iObjectId;

    iObjectId = 0;

    iTrackObserver = &aTrackObserver;

    // Either local to remote or remote to remote

    if( aPlaybackDirection == EDirectionRemote )

        {

        if( aCodedTrackUri.Find( KUPnPPrefix ) == 0 )

            {

            // track is located in remote

            iTrackLocation = ETrackLocationRemote;

            // parse and save media server id and object id

            ParsePiecesL( aCodedTrackUri );

            // start a browsing session

            StartBrowsingSessionL();

            // create resolver 

            iItemResolver =

                UPnPItemResolverFactory::NewRemoteItemResolverL(

                *iObjectId, *iBrowsingSession, 

                iDefaultSelector, KFilterCommon );

            }

        else // Local stored. Save URI to local member

            {

            // track is located in local file system

            iTrackLocation = ETrackLocationLocal;

            // store original URI

            iOriginalURI = HBufC::NewL( aCodedTrackUri.Length() );

            iOriginalURI->Des().Copy( aCodedTrackUri );

			// check for DRM protection

			if ( UPnPFileUtility::IsFileProtectedL( iOriginalURI->Des() ) )

				{

				// call back directly with an error code

				iTrackObserver->ResolveURIComplete( KErrNotSupported );

				return;

				}

			else

				{

	            // create resolver.

	            iItemResolver =

	                UPnPItemResolverFactory::NewLocalItemResolverL(

						*iOriginalURI, iAvController, iFirstSelector,

						UPnPItemResolverFactory::EOmitDrmCheck );

				}

            }

        }

    else // Remote to local direction

        {

        // track is located in remote

        iTrackLocation = ETrackLocationRemote;

        // parse and save media server id and object id

        ParsePiecesL( aCodedTrackUri );

        // start a browsing session

        StartBrowsingSessionL();

        // create resolver

        iItemResolver =

            UPnPItemResolverFactory::NewDownloadItemResolverL(

            *iObjectId, iAvController, *iBrowsingSession, 

            iFirstSelector, KFilterCommon );

        }

    // Resolve remote item. Calls back to ResolveComplete

    iState = EStateResolving;

    TRAPD( e, iItemResolver->ResolveL( *this ); )

    if ( e != KErrNone )

        {

        if ( iState == EStateSelfDestruct )

            {

            __LOG( "CUPnPTrack: self-destructing" );

            delete this;

            }

        else

            {

            iState = EStateIdle;

            User::Leave( e );

            }

        }

    }

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

// CUPnPTrack::StartBrowsingSessionL

// Finds the apropriate mediaserver and starts a browsing session

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

//

void CUPnPTrack::StartBrowsingSessionL()

    {

    // Get list of media servers                 

    CUpnpAVDeviceList* devices = iAvController.GetMediaServersL();

    CleanupStack::PushL( devices );

    // Find out index of wanted media server from media server list 

    TInt index = KErrNotFound; 

    TInt count = devices->Count();

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

        {                                              

        // If media server id match.

        if( !iMediaServer->Compare( (*devices)[ i ]->Uuid() ) )

            {

            index = i;

            break;      

            }

        }

    // Leave if media server does not find by id 

    if( index == KErrNotFound )

        {

        __LOG1( "CUPnPTrack: Media server not found: %S",

            iMediaServer );

        User::Leave( KErrNotFound );    

        }

    // start a browsing session

    iBrowsingSession = &iAvController.StartBrowsingSessionL(

        *(*devices)[ index ] );

    CleanupStack::PopAndDestroy( devices );

    }

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

// CUPnPTrack::StopBrowsingSession

// Finds the apropriate mediaserver and starts a browsing session

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

//

void CUPnPTrack::StopBrowsingSession()

    {

    // Stop browsing session if exist.

    if( iBrowsingSession )

        {

        __LOG( "Stop browsing session" );

        iAvController.StopBrowsingSession( *iBrowsingSession );

        iBrowsingSession = 0;

        }

    }

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

// CUPnPTrack::URI

// Return original URI of track.

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

//  

const TDesC& CUPnPTrack::URI() const

    {

    __ASSERTD( iOriginalURI != 0,__FILE__, __LINE__ );

    return *iOriginalURI;

    }

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

// CUPnPTrack::UpnpURI

// Return True UPNP URI of track.

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

//  

const TDesC8& CUPnPTrack::UpnpURI() const

    {

    __ASSERTD( iIsItemSolved,__FILE__, __LINE__ );

    return iItemResolver->Resource().Value();

    }

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

// CUPnPTrack::UpnpItem

// Return True UPNP item representing the track

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

//  

const CUpnpItem& CUPnPTrack::UpnpItem() const

    {

    __ASSERTD( iIsItemSolved,__FILE__, __LINE__ );

    return iItemResolver->Item();

    }

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

// CUPnPTrack::FilePath

// Returns the file path of local item 

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

//  

const TDesC& CUPnPTrack::FilePath() const

    {

    __ASSERTD( iTrackLocation == ETrackLocationRemote, __FILE__, __LINE__ );

    __ASSERTD( iIsItemSolved,__FILE__, __LINE__ );

    return iItemResolver->Resource().FilePath();

    }

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

// CUPnPTrack::IsRemote

// Return location of track. ETrue = remote. EFalse = local

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

//  

TBool CUPnPTrack::IsRemote() const

    {

    return iTrackLocation == ETrackLocationRemote;

    }

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

// CUPnPTrack::TrackDuration

// returns duration of the track

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

// 

TInt CUPnPTrack::TrackDuration()

    {

    __LOG1( "CUPnPTrack::TrackDuration duration: %d", iTrackDuration );

    TInt ms = InitialTrackDuration;

    if ( iTrackDuration > InitialTrackDuration )

        {

        ms = iTrackDuration;

        }

    else if ( iIsItemSolved )

        {

        const CUpnpAttribute* attr = UPnPItemUtility

            ::FindAttributeByName( iItemResolver->Resource(),

             KAttributeDuration );

        if ( attr != 0 )

            {

            if ( UPnPItemUtility::UPnPDurationAsMilliseconds(

                attr->Value(), ms ) == KErrNone )

                {

                // store duration for quicker future queries

                iTrackDuration = ms;

                __LOG1( "store duration: %d", iTrackDuration );

                }

            }

        }

    return ms;

    }

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

// CUPnPTrack::SetTrackDuration

// overrides duration of the track

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

// 

void CUPnPTrack::SetTrackDuration( TInt aMilliseconds )

    {

    iTrackDuration = aMilliseconds;

    }

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

// CUPnPTrack::GetMetaDataL

// Get metadata information for track from media server

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

//  

void CUPnPTrack::GetMetaDataL( const TArray<TMPXAttribute>& aAttrs, 

    MMPXPlaybackPluginObserver& aObs )

    {

    // Check if remote track

    if( iTrackLocation == ETrackLocationLocal )

        {

        __LOG( "CUPnPTrack::GetMetaData - No metadata for local track!" );

        User::Leave( KErrNotSupported );

        }

    if ( iIsItemSolved )

        {

        __LOG( "CUPnPTrack::GetMetaDataL" );

        DeliverMedataL( aAttrs, aObs );

        }

    else

        {

        __LOG( "CUPnPTrack::GetMetaDataL - pending" );

        iMetadataObserver = &aObs;

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

            {

            }

        }

    }

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

// CUPnPTrack::SendMediaChangedEventL

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

// 

void CUPnPTrack::SendMediaChangedEventL(

    MMPXPlaybackPluginObserver& aObs )

    {

    RArray<TMPXAttribute> attrs;

    CleanupClosePushL( attrs );

    attrs.AppendL( KMPXMediaGeneralTitle );

    attrs.AppendL( KMPXMediaMusicArtist );

    attrs.AppendL( KMPXMediaMusicAlbum );

    attrs.AppendL( KMPXMediaMusicGenre );

    attrs.AppendL( KMPXMediaGeneralDate );

    attrs.AppendL( KMPXMediaMusicYear );

    attrs.AppendL( KMPXMediaGeneralComment );

    attrs.AppendL( KMPXMediaGeneralMimeType );

    // Create and fill CMPXMedia class 

    RArray<TInt> suppIds;

    CleanupClosePushL( suppIds );

    suppIds.AppendL( KMPXMediaIdMusic );

    suppIds.AppendL( KMPXMediaIdGeneral );

    suppIds.AppendL( KMPXMediaIdAudio );

    CMPXMedia* media = CMPXMedia::NewL( suppIds.Array() );

    CleanupStack::PopAndDestroy( &suppIds );

    CleanupStack::PushL( media );

    FillMediaFromItemL( *media, attrs.Array() );

    // create an MPX message

    CMPXMessage* msg = CMPXMessage::NewL();

    CleanupStack::PushL( msg );

    msg->SetTObjectValueL<TMPXMessageId>(

        KMPXMessageGeneralId, KMPXMessagePbMediaChanged );

    msg->SetCObjectValueL<CMPXMedia>(

        KMPXMessagePbMedia, media );

    // send message

    aObs.HandlePlaybackMessage( *msg );

    CleanupStack::PopAndDestroy( msg );

    CleanupStack::PopAndDestroy( media );

    CleanupStack::PopAndDestroy( &attrs );

    }

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

// CUPnPTrack::DeliverMedatataL

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

// 

void CUPnPTrack::DeliverMedataL( const TArray<TMPXAttribute>& aAttrs, 

    MMPXPlaybackPluginObserver& aObs, TInt aError )

    {

    __LOG( "CUPnPTrack::DeliverMedatata");

    // Create and fill CMPXMedia class 

    RArray<TInt> suppIds;

    CleanupClosePushL( suppIds );

    suppIds.AppendL( KMPXMediaIdMusic );

    suppIds.AppendL( KMPXMediaIdGeneral );

    suppIds.AppendL( KMPXMediaIdAudio );

    CMPXMedia* media = CMPXMedia::NewL( suppIds.Array() );

    CleanupStack::PopAndDestroy( &suppIds );        

    CleanupStack::PushL( media );

    if ( aError == KErrNone )

        {

        FillMediaFromItemL( *media, aAttrs );

        }

    // Return metadata

    aObs.HandleMedia( *media, aError );

    CleanupStack::PopAndDestroy( media );

    }

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

// CUPnPTrack::FillMediaFromItemL

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

// 

void CUPnPTrack::FillMediaFromItemL( CMPXMedia& aMedia,

    const TArray<TMPXAttribute>& aAttrs )

    {

    __ASSERTD( iIsItemSolved,__FILE__, __LINE__ );

    // Fill metadata 

    const CUpnpElement* elem;

    // Song title

    if( Exists( aAttrs, KMPXMediaGeneralTitle ) )

        {

        __LOG( "CUPnPTrack: Metadata: Title");

        aMedia.SetTextValueL(

            KMPXMediaGeneralTitle, *To16LC( 

            iItemResolver->Item().Title() ) );

        CleanupStack::PopAndDestroy();

        }

    // Artist

    if( Exists( aAttrs, KMPXMediaMusicArtist ) )

        {

        if ( ( elem = UPnPItemUtility::FindElementByName(

            iItemResolver->Item(), KElementArtist ) ) != 0 )

            {

            __LOG( "CUPnPTrack: Metadata: Artist" );

            aMedia.SetTextValueL(

                KMPXMediaMusicArtist, *To16LC( elem->Value() ) );

            CleanupStack::PopAndDestroy();

            }

        else if ( ( elem = UPnPItemUtility::FindElementByName(

            iItemResolver->Item(), KElementCreator ) ) != 0 )

            {

            __LOG( "CUPnPTrack: Metadata Creator" );