/*

* 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:   Class used to check the protection of the 

*                media files.

*

*/

// INCLUDE FILES

#include "mediafileprotection.h"

#include "mediafilelist.h"

#include "mediafilelistdebug.h"

#include <mediafilelist.rsg>

#include <DRMCommon.h>

#include <drmutility.h>

#include <drmagents.h>

#include <bautils.h>

#include <StringLoader.h>

/******************************************************************************

 * class CMFProtectionHandler

 ******************************************************************************/

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

// CMFProtectionHandler::NewL

//

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

CMFProtectionHandler* CMFProtectionHandler::NewL()

    {

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

    CleanupStack::PushL(self);

    self->ConstructL();

    CleanupStack::Pop(self);

    return self;

    }

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

// CMFProtectionHandler::CMFProtectionHandler

// 

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

//

CMFProtectionHandler::CMFProtectionHandler()

	{

	iMaxFileSize = KErrNotFound;

    }

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

// CMFProtectionHandler::CMFProtectionHandler

//

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

//

void CMFProtectionHandler::ConstructL()

    {

    iDriveUtil = CDriveUtil::NewL();

    iVariation = CMediaFileDialogVariation::NewL();

    iDRMHelper = CDRMHelper::NewL( *CCoeEnv::Static() );

    iDRMCommon = DRMCommon::NewL();

    User::LeaveIfError( iDRMCommon->Connect() );

    iExcludedMimeTypes = CMimeTypeList::NewL();

    User::LeaveIfError( iApaLsSession.Connect() );

    User::LeaveIfError( iFsSession.Connect() );

    }

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

// Destructor

//

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

//

CMFProtectionHandler::~CMFProtectionHandler()

    {

    delete iDriveUtil;

    delete iVariation;

    delete iDRMHelper;

    if ( iDRMCommon )

        {

        iDRMCommon->Disconnect(); // ignore possible error

        delete iDRMCommon;

        }

    delete iExcludedMimeTypes;

    iApaLsSession.Close();

    iFsSession.Close();

    }

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

// CMFProtectionHandler::SetAttr

// 

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

void CMFProtectionHandler::SetAttrL( TInt aAttr, TInt aValue )

    {

    switch ( aAttr )

        {

        case CMediaFileList::EAttrFileSize:

            {

            iMaxFileSize = aValue;

            break;

            }

        case CMediaFileList::EAttrAutomatedType:

            {

            iAutomatedType = (CDRMHelper::TDRMHelperAutomatedType) aValue;

            break;

            }

        default:

            {

            break;

            }

        }

    }

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

// CMFProtectionHandler::SetAttrL

// 

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

void CMFProtectionHandler::SetAttrL( TInt aAttr, const TDesC& aValue )

    {

    if ( aAttr == CMediaFileList::EAttrExcludeMimeType )

        {

        if ( aValue.Length() > KMaxFileName || aValue.Length() == 0 )

            {

            User::Leave( KErrArgument );

            }

        iExcludedMimeTypes->AddMimeTypeL( aValue );

        }

    }

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

// CMFProtectionHandler::IsVideoValid

// 

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

//

TBool CMFProtectionHandler::IsVideoValid( const TDesC& aFileName,

                                         TIntention aIntention )

    {

    TInt err = KErrNone;

    TBool ret = EFalse;

    TRAP( err, ret = IsVideoValidL (aFileName, aIntention ) )

    if ( err != KErrNone )

        {

        return EFalse;  // in case of error file is not valid

        }

    return ret;

    }

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

// CMFProtectionHandler::IsVideoValidL

// 

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

//

TBool CMFProtectionHandler::IsVideoValidL( const TDesC& aFileName,

                                          TIntention /*aIntention*/ )

    {

    TBuf<KMaxDataTypeLength> dataType( DataTypeL( aFileName ).Des() );

    if ( iExcludedMimeTypes->FindMimeTypeL( dataType ) )

        {

        return EFalse;

        }

    CContent* content = CContent::NewLC( aFileName,

                                         EContentShareReadWrite );

    TInt deliveryMethod = 0;

    content->GetAttribute( EDeliveryMethod, deliveryMethod );

    CleanupStack::PopAndDestroy( content );

    if( deliveryMethod == EOmaDrm2 )

        {

        // if video it is OMA DRM 2 protected, it cannot be previewed

        return EFalse;

        }

    return ETrue;

    }

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

// CMFProtectionHandler::IsFileValid

// 

// Checks protection state of media file. If this function returns EFalse,

// media file cannot be used for playing/selection.

//

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

//

TBool CMFProtectionHandler::IsFileValid( const TDesC& aFileName,

                                         TIntention aIntention )

    {

    TInt err = KErrNone;

    TBool ret = EFalse;

    TRAP( err, ret = IsFileValidL (aFileName, aIntention ) )

    if ( err != KErrNone )

        {

        return EFalse;  // in case of error file is not valid

        }

    return ret;

    }

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

// CMFProtectionHandler::IsFlieDRMExpired

// 

// Check if the DRM protect file is expired or have no rights.

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

//

TBool CMFProtectionHandler::IsFlieDRMExpired( const TDesC& aFileName )

    {

    // Check whether the file can be set as automated content or not

    TBool canSetAutomated = EFalse;

    TInt canSetAutomatedErr = iDRMHelper->CanSetAutomated( aFileName, canSetAutomated );

    // Check if rights expried or no rights to use

    if ( canSetAutomatedErr == DRMCommon::ERightsExpired ||

        canSetAutomatedErr == DRMCommon::ENoRights )

        {

        return ETrue;

        }

    return EFalse;

    }

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

// CMFProtectionHandler::IsFileValidL

// 

// Function is copy from CFLDDRMImplementation.cpp.

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

//

TBool CMFProtectionHandler::IsFileValidL( const TDesC& aFileName, 

                                          TIntention aIntention )

    {

    TInt err = KErrNone;

    TBuf<KMaxDataTypeLength> dataType( DataTypeL( aFileName ).Des() );

    if ( aFileName.Length() == 0 )

        {

        return ETrue;  // empty filename is valid??

        }

    if ( iExcludedMimeTypes->FindMimeTypeL( dataType ) )

        {

        ShowErrorNoteL( R_QTN_INFO_FILE_FORMAT_ERROR );

        return EFalse;

        }

    if ( aIntention == CMFProtectionHandler::ESelect && 

        !CheckFileSize( aFileName, dataType ) )

        {

        HBufC* hBuf = StringLoader::LoadLC( R_QTN_INFO_FILE_SIZE_ERROR, iMaxFileSize );

        TMFDialogUtil::ShowInformationNoteL( *hBuf );

        CleanupStack::PopAndDestroy( hBuf );

        return EFalse;

        }

    if ( iDriveUtil->IsRom( aFileName ) )

        {

        return ETrue;      // files in ROM are always valid

        }

    // check if file is WMDRM protected

    TBool prot =  EFalse;

    TRAP( err, prot = IsFileWMDRMProtectedL( aFileName ) );

    if ( err != KErrNone )

        {

        ShowErrorNoteL( R_QTN_INFO_FILE_FORMAT_ERROR );

        return EFalse;

        }

    if ( prot )

        {

        if ( aIntention == EPlay )

            {

            ShowErrorNoteL( R_QTN_INFO_DRM_PREV_RIGHTS_USE );

            }

        else

            {

            ShowErrorNoteL( R_QTN_INFO_DRM_PROTECTED );

            }

        return EFalse;

        }

    ContentAccess::TVirtualPathPtr path( aFileName,

                        ContentAccess::KDefaultContentObject );

    CData* data = CData::NewLC( path, EContentShareReadWrite );

    TInt isProtected;

    err = data->GetAttribute( EIsProtected, isProtected );

    CleanupStack::PopAndDestroy( data );

    if ( err != DRMCommon::EOk )

        {

        // DRM Helper class knows at least rights db corrupted error message.

        // Leaves on system-wide error code.

        iDRMHelper->HandleErrorL( err, aFileName );

        return EFalse;

        }

    // Obtain information whether the file can be set as automated content

    TBool canSetAutomated = EFalse;

    TInt canSetAutomatedErr = 

         iDRMHelper->CanSetAutomated( aFileName, canSetAutomated );

    if ( !isProtected && canSetAutomated )

        {

        // The file in question is not DRM protected.

        // Return ETrue if file is also Ok unprotected, otherwise EFalse.

        TBool ret = IsFileValidUnprotectedL( aFileName, aIntention );

        return ret;

        }

    // Operator requirement: Check restrictions if file is mp4 audio

    if ( iVariation->IsBlockedProtectedType( dataType ) )

        {

        ShowErrorNoteL( R_QTN_INFO_DRM_PROTECTED );

        return EFalse;

        }

    if ( canSetAutomatedErr == DRMCommon::ERightsExpired ||

        canSetAutomatedErr == DRMCommon::ENoRights )

        {

        // Rights are expired, future rights or missing

        iDRMHelper->HandleErrorL( canSetAutomatedErr, aFileName );

        return EFalse;

        }

    // Operator requirement: Check DRM v2 tones

    if ( !canSetAutomated )

        {

        // This is DRM v2 file OR count based v1 tone

        if ( aIntention == EPlay )

            {

            ShowErrorNoteL( R_QTN_INFO_DRM_PREV_RIGHTS_USE );

            }

        else

            {

            ShowErrorNoteL( R_QTN_INFO_DRM_PROTECTED );

            }

        return EFalse;

        }

    TInt32 infoBits( 0x00000000 );

    // Find out rights information

    if ( !GetFileInfoL( aFileName, infoBits ) )

        {

        // Corrupted file or "No rights" situation

        return EFalse;

        }

    // Operator requirement: Check CFM protection

    if ( infoBits & ENoRingingTone )

        {

        // This is CFM protected file, ringingtone is set to "no"

        if ( aIntention == EPlay )

            {

            ShowErrorNoteL( R_QTN_INFO_DRM_PREV_RIGHTS_USE );

            }

        else

            {

            ShowErrorNoteL( R_QTN_INFO_DRM_PREV_RIGHTS_SET );

            }

        return EFalse;

        }

    if ( aIntention == ESelect )

        {

        // Rights are good to go, and intention is selection

        // call SetAutomatedPassive to show 'activation query' 

        iDRMHelper->SetAutomatedType( iAutomatedType );

        err = iDRMHelper->SetAutomatedPassive( aFileName );

        if ( err != KErrCancel )

            {

            // User accepted dialog

            User::LeaveIfError( err );

            // New way, does not require DRM capability

            data = CData::NewLC( path, EContentShareReadWrite );

            err = data->ExecuteIntent( ContentAccess::EPlay );

            // Wrongly requires DRM after all. According to Risto Vilkman

            // from DRM, KErrAccessDenied can be ignored, since if

            // CanSetAutomated says the tone is OK, it's OK.

            if ( err != KErrNone && err != KErrAccessDenied )

                {

                User::Leave( err );

                }

            CleanupStack::PopAndDestroy( data );

            }

        else

            {

            // User canceled dialog

            return EFalse;

            }

        }

    return ETrue;

    }

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

// CMFProtectionHandler::GetFileInfo

//

// Function is copy from CFLDDRMImplementation.cpp.

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

//

TBool CMFProtectionHandler::GetFileInfoL( const TDesC& aFileName,

                                          TInt32& aInfoBits )

    {

    DRMCommon::TContentProtection contentProtection; // ignored

    HBufC8* mimeType = NULL; // ignored

    TUint dataLength = 0; // ignored

    HBufC8* contentURI = NULL;

    // Obtain content URI

    TInt error = iDRMCommon->GetFileInfo(

        aFileName, contentProtection, mimeType, contentURI, dataLength );

    delete mimeType;

    if ( error != DRMCommon::EOk )

        {

        delete contentURI;

        // Handle possible corrupt file situation

        iDRMHelper->HandleErrorL( error, aFileName );

        return EFalse;

        }

    // Obtain rights object

    CDRMRights* rights = NULL;

    error = iDRMCommon->GetActiveRights( *contentURI, DRMCommon::EPlay, rights );

    delete contentURI;

    if ( error == DRMCommon::ENoRights )

        {

        delete rights;

        // There is no rights for given file

        // Should never arrive here, ENoRights is handled

        // already in IsFileValidL()

        iDRMHelper->HandleErrorL( error, aFileName );

        return EFalse;

        }

    // Obtain infobits ( needed only for CFM case )     

   aInfoBits = rights->GetPermission().iInfoBits;

   delete rights;

   return ETrue;

   }

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

// CMFProtectionHandler::IsFileWMDRMProtectedL

//

// Function is copy from CFLDDRMImplementation.cpp.

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

//

TBool CMFProtectionHandler::IsFileWMDRMProtectedL( const TDesC& aFileName )

    {

    TBool res = EFalse;

    RFile hFile;

    TInt err = hFile.Open( iFsSession, aFileName, 

                           EFileRead | EFileStream | EFileShareReadersOnly );

    if ( err == KErrInUse )

        {

        err = hFile.Open( iFsSession, aFileName, 

                        EFileRead | EFileStream | EFileShareAny );

        }

    if ( err != KErrNone )

        {

        User::Leave( err );

        }

    CleanupClosePushL( hFile );

    TPtrC agent( KNullDesC );

    DRM::CDrmUtility* drmUtil = DRM::CDrmUtility::NewLC();

    drmUtil->GetAgentL( hFile, agent );

    if ( agent.Compare( DRM::KDrmWMAgentName ) == 0 )

        {

        res = ETrue;

        }

    CleanupStack::PopAndDestroy( drmUtil );

    CleanupStack::PopAndDestroy( &hFile );

    return res;

    }

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

// CMFProtectionHandler::DataTypeL

//

// Function is copy from CFLDDRMImplementationCommon.cpp.

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

//

TDataType CMFProtectionHandler::DataTypeL( const TDesC& aFileName )

    {

    TUid dummyUid = { 0 };

    TDataType dataType( dummyUid );

    User::LeaveIfError(

        iApaLsSession.AppForDocument( aFileName, dummyUid, dataType ) );