/*

* 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:      Utility for parsing upnp items

*

*/

// INCLUDE FILES

// System

#include <e32std.h>

// dlnasrv / mediaserver api

#include <upnpitem.h>

#include <upnpdlnaprotocolinfo.h>

// dlnasrv / avcontroller helper api

#include "upnpconstantdefs.h" // for KValueNotImplemented

#include "upnpitemutility.h"

_LIT( KComponentLogfile, "upnpavcontrollerhelper.txt");

#include "upnplog.h"

// CONSTANTS

const TInt KDateStringLength        = 10;

const TInt KDateTimeStringLength    = 19;

const TInt KMaxDateStringLength     = 30;

const TInt KCodeSemicolon           = 58;

_LIT( KSeparator,                   ":" );

_LIT( KNullTime,                    "000000" );

_LIT8( KHttp,                       "http://" );

_LIT8( KCiParam,                    "DLNA.ORG_CI" );

/* removed due to M-DMC CTT test case 7.3.26.2

_LIT8( KAudioSupport,               "audio/" );

_LIT8( KImageSupport,               "image/" );

_LIT8( KVideoSupport,               "video/" );

*/

// ============================ LOCAL FUNCTIONS =============================

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

// UPnPItemUtility::BelongsToClass

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

EXPORT_C TBool UPnPItemUtility::BelongsToClass(

    const CUpnpObject& aObject,

    const TDesC8& aClass )

    {

    TBool beginsWith = 

        ( aObject.ObjectClass().Find( aClass ) == 0 );

    return beginsWith;

    }

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

// UPnPItemUtility::GetResElements

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

EXPORT_C void UPnPItemUtility::GetResElements(

    const CUpnpObject& aObject,

    RUPnPElementsArray& aResElementsArray )

    {

    const RUPnPElementsArray& array =

        const_cast<CUpnpObject&>(aObject).GetElements();

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

        {

        if( array[ i ]->Name() == KElementRes() )

            {

            aResElementsArray.Append( array[ i ] );

            }

        }    

    }

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

// UPnPItemUtility::ResourceFromItemL

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

EXPORT_C const CUpnpElement& UPnPItemUtility::ResourceFromItemL(

    const CUpnpItem& aItem )

    {

    __LOG( "UpnpItemUtility:ResourceFromItemL" );

    // Obtain list of item's res elements   

    RUPnPElementsArray elms;

    GetResElements( aItem, elms );

    TInt count = elms.Count();

    CUpnpDlnaProtocolInfo* pInfo = NULL;

    TBool found = EFalse;

    TInt i(0);

    // bestCandidate is an index of some res element in the list. This res

    // will be considered as the best candidate for desired res and that

    // candidate will be returned if no res element contains false CI-flag.

    const CUpnpElement* bestCandidate = 0;

    // determine which resource is the original one

    // 1. In DLNA 1.5 case, parse protocolInfo attribute and see if some res 

    //    element has CI-flag false (=not converted so that is what we want)

    // 2. In non-DLNA 1.5 case and in DLNA 1.5 case where CI-flag does not 

    //    exist, do the following:

    //      o filter out other than HTTP GET resources (internal uri's, RTP)

    //      o filter out resources that do not match itemtype (mime type of 

    //        audio file resources should start with "audio/" etc.)

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

        {

        // Make sure that it is a HTTP GET resource. Otherwise continue.

        if( elms[ i ]->Value().Left( KHttp.iTypeLength ).Compare( KHttp() ) 

            != 0 )

            {

            continue;

            }

        // Obtain protocolInfo of the res element.

        const CUpnpAttribute* attr = FindAttributeByName(

            *elms[i], KAttributeProtocolInfo() );

        if ( attr ) 

            {           

            TRAP_IGNORE( pInfo = CUpnpDlnaProtocolInfo::NewL( attr->Value() ) );

            if( !pInfo )

                {

                //if pInfo, start next one!

                continue;

                }

            // check if CI parameter is false or it doesn't have CI parameters at all.

            //for upnp item, always the first res element is the best, resolution

            // should be checked in the future

            if ( ( attr->Value().Find( KCiParam() ) != KErrNotFound && 

                 pInfo->CiParameter() == EFalse ) || 

                 attr->Value().Find( KCiParam() ) == KErrNotFound )

                {

                // end loop, we found what we were looking for. 

                found = ETrue;

                delete pInfo; pInfo = NULL;

                break;                

                }

/* removed due to M-DMC CTT test case 7.3.26.2            

            // check that mimetype corresponds to objectType

            TPtrC8 mime = pInfo->ThirdField();

            TPtrC8 objectClass = aItem.ObjectClass();

            if ( objectClass.Compare( KClassAudio ) == 0 ) 

                {

                if ( mime.Left( KAudioSupport().Length() ).CompareF( 

                                                    KAudioSupport() ) != 0 ) 

                    {

                    // if mime type does not match to object type, this is 

                    // not the correct resource.

                    delete pInfo; pInfo = NULL;

                    continue;

                    }

                }

            else if ( objectClass.Compare( KClassVideo ) == 0 ) 

                {

                if ( mime.Left( KVideoSupport().Length() ).CompareF( 

                                                    KVideoSupport() ) != 0 ) 

                    {

                    // if mime type does not match to object type, this is 

                    // not the correct resource.

                    delete pInfo; pInfo = NULL;

                    continue;

                    }

                }

            else if ( objectClass.Compare( KClassImage ) == 0 ) 

                {

                if ( mime.Left( KImageSupport().Length() ).CompareF( 

                                                    KImageSupport() ) != 0 ) 

                    {

                    // if mime type does not match to object type, this is 

                    // not the correct resource.

                    delete pInfo; pInfo = NULL;

                    continue;

                    }

                }

 */

            // use the first suitable res field as candidate which will be

            // returned if better is not found.

            // More sophisticated solution would be to compare resolution

            // etc. attributes to determine the best candidate,

            if ( 0 == bestCandidate ) 

                {

                bestCandidate = elms[i];

                }

            delete pInfo; pInfo = NULL;

            }

        else 

            {

            // No mandatory protocolinfo attribute. This is not what we want.

            }

        }

    if ( found ) 

        {

        bestCandidate = elms[i];

        }

    // close the elements array

    elms.Close();

    if( bestCandidate == 0 )

        {

        User::Leave( KErrNotFound );

        }

    return *bestCandidate;

    }

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

// UPnPItemUtility::FindElementByName

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

EXPORT_C const CUpnpElement* UPnPItemUtility::FindElementByName(

    const CUpnpObject& aObject, const TDesC8& aName )

    {

    __LOG( "UpnpItemUtility:FindElementByName" );

    CUpnpElement* element = NULL;

    const RUPnPElementsArray& array =

        const_cast<CUpnpObject&>(aObject).GetElements();

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

        {

        if( array[ i ]->Name() == aName )

            {

            element = array[ i ];

            i = array.Count();

            }

        }

    return element;

    }

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

// UPnPItemUtility::FindElementByNameL

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

EXPORT_C const CUpnpElement& UPnPItemUtility::FindElementByNameL(

    const CUpnpObject& aObject, const TDesC8& aName )

    {

    __LOG( "UpnpItemUtility:FindElementByNameL" );

    const CUpnpElement* element = FindElementByName(

        aObject, aName );

    if( !element )

        {

        User::Leave( KErrNotFound );

        }

    return *element;    

    }

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

// UPnPItemUtility::FindAttributeByName

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

EXPORT_C const CUpnpAttribute* UPnPItemUtility::FindAttributeByName(

    const CUpnpElement& aElement, const TDesC8& aName )

    {

    __LOG( "UpnpItemUtility:FindAttributeByName" );

    CUpnpAttribute* attribute = NULL;

    const RUPnPAttributesArray& array =

        const_cast<CUpnpElement&>(aElement).GetAttributes();

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

        {

        TBufC8<255> buf(array[ i ]->Name());

        if( array[ i ]->Name() == aName )

            {

            attribute = array[ i ];

            i = array.Count();

            }

        }

    return attribute;

    }

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

// UPnPItemUtility::FindAttributeByNameL

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

EXPORT_C const CUpnpAttribute& UPnPItemUtility::FindAttributeByNameL(

    const CUpnpElement& aElement, const TDesC8& aName )

    {

    __LOG( "UpnpItemUtility:FindAttributeByNameL" );

    const CUpnpAttribute* attribute = FindAttributeByName(

        aElement, aName );

    if( !attribute )

        {

        User::Leave( KErrNotFound );

        }

    return *attribute;        

    }

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

// UPnPItemUtility::UpnpDateAsTTime

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

EXPORT_C TInt UPnPItemUtility::UPnPDateAsTTime(

    const TDesC8& aUpnpDate, TTime& aTime )

    {

    __LOG( "UpnpItemUtility:UpnpDateAsTTime" );

    TRAPD( err, UPnPItemUtility::UPnPDateAsTTimeL( aUpnpDate, aTime ) );

    return err;

    }

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

// UPnPItemUtility::UpnpDurationAsMilliseconds

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

EXPORT_C TInt UPnPItemUtility::UPnPDurationAsMilliseconds(

    const TDesC8& aDuration, TInt& aMilliseconds )

    {

    __LOG( "UpnpItemUtility:UpnpDurationAsMilliseconds" );

    TInt retVal = KErrNone;    

    if( aDuration.Length() > 0 )

        {

        // Check if information is actually returned by the device

        if( aDuration.Compare( KValueNotImplemented ) != 0 )

            {        

            TInt time = 0;

            TChar separator( KCodeSemicolon );

            TInt lposit = aDuration.Locate( separator );

            if ( lposit != KErrNotFound )

                {

                TInt rposit = aDuration.LocateReverse( separator );

                if( rposit != lposit )

                    {

                    // Hours

                    TLex8 lex( aDuration.Left( lposit ) );

                    retVal = lex.Val( time ); 

                    if( retVal == KErrNone  )

                        {

                        // Convert to ms and add

                        aMilliseconds += time * 3600 * 1000;

                        // Minutes

                        lex.Assign( aDuration.Mid(

                            lposit + 1, rposit - lposit - 1 ) );

                        retVal = lex.Val( time ); 

                        if( retVal == KErrNone )

                            {

                            // Convert to ms and add

                            aMilliseconds += time * 60* 1000;

                            // Seconds

                            lex.Assign( aDuration.Mid(

                                rposit + 1, 2 ) );

                            retVal = lex.Val( time ); 

                            if( retVal  == KErrNone )

                                {

                                // Convert to ms and add

                                aMilliseconds += time * 1000;

                                }

                            }

                        }

                    }

                else

                    {

                    retVal = KErrNotSupported;

                    }        

                }

            else

                {

                retVal = KErrNotSupported;

                }   

            }  

        else

            {

            retVal = KErrNotSupported;

            }

        }

    else

        {

        retVal = KErrNotSupported;

        }

    return retVal;

    }

void UPnPItemUtility::UPnPDateAsTTimeL( const TDesC8& aUpnpDate,

    TTime& aTime )

    {

    // This method is capable of handling the most common dc:date formats:

    // CCYY-MM-DD and CCYY-MM-DDThh:mm:ss

    // Rest of the dc:date formats are handled as well, but they might not

    // be converted precisely

    TBuf<KMaxDateStringLength> formatDateString;

    HBufC* dateString = HBufC::NewL( aUpnpDate.Length() );

    dateString->Des().Copy( aUpnpDate );

    if( aUpnpDate.Length() >= KDateStringLength )

        {

        // CCYY-MM-DD --> CCYYMMDD

        formatDateString.Copy( dateString->Des().Left( 4 ) ); // Year

        formatDateString.Append( dateString->Des().Mid( 5,2 ) ); // Month

        formatDateString.Append( dateString->Des().Mid( 8,2 ) ); // Day        

        if( aUpnpDate.Length() >= KDateTimeStringLength )

            {

            // hh:mm:ss --> hhmmss

            formatDateString.Append( KSeparator );

            // Hours

            formatDateString.Append( dateString->Des().Mid( 11, 2 ) ); 

            // Minutes

            formatDateString.Append( dateString->Des().Mid( 14, 2 ) );

            // Seconds 

            formatDateString.Append( dateString->Des().Mid( 17, 2 ) ); 

            }

        else

            {

            // hh:mm:ss --> 000000

            formatDateString.Append( KSeparator );

            formatDateString.Append( KNullTime );

            }

        }

    delete dateString;

    User::LeaveIfError( aTime.Set( formatDateString ) );

    }