/*

* Copyright (c) 2006-2009 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:  Composer image active object

*

*/

#include <e32base.h>

#include <e32debug.h>

#include <mderelation.h>

#include <mderelationquery.h>

#include <mdelogiccondition.h>

#include "mdeharvestersession.h"

#include "mdeproperty.h"

#include "mdenamespacedef.h"

#include "imagecomposerao.h"

#include "harvesterlog.h"

#include "mdeconstants.h"

#include "mdsutils.h"

#include "mderelationcondition.h"

#include "mdeobjectdef.h"

#include "harvestercommon.h"

using namespace MdeConstants;

_LIT( KJpegMimeType, "image/jpeg" );

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

// NewL

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

//

CImageComposerAO* CImageComposerAO::NewL()

    {

    WRITELOG( "CImageComposerAO::NewL()" );

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

    CleanupStack::PushL( self );

    self->ConstructL();

    CleanupStack::Pop( self );

    return self;

    }

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

// ~CImageComposerAO

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

//

CImageComposerAO::~CImageComposerAO() // destruct

    {   

    WRITELOG( "CImageComposerAO::~CImageComposerAO()" );

    Cancel();

    iItemQueue.Close();

    iForceObjectIds.Close();

    iNextItemsSkip.Close();

    if ( iMdeObject )

        {

        delete iMdeObject;

        }

    if ( iExifUtil )

    	{

    	delete iExifUtil;

    	}

    delete iRelationQuery;

    iFs.Close();

    delete iMdEHarvesterSession;

    }

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

// CComposerImagePlugin

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

//

CImageComposerAO::CImageComposerAO() : // first-phase C++ constructor

		CActive( KHarvesterPriorityComposerPlugin )

    {

    WRITELOG( "CImageComposerAO::CImageComposerAO()" );

    }

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

// ConstructL

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

//

void CImageComposerAO::ConstructL() // second-phase constructor

    {

    WRITELOG( "CImageComposerAO::ConstructL()" );

    iMdeObject = NULL;

    iNextRequest = ERequestReady;

    iDefaultNamespace = NULL;

    iImageObjectDef = NULL;

    iObjectDef = NULL;

    iLocationObjectDef = NULL;

    CActiveScheduler::Add( this );

    iExifUtil = CHarvesterExifUtil::NewL();

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

    }

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

// DoCancel

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

//

void CImageComposerAO::DoCancel()

    {

    WRITELOG( "CImageComposerAO::DoCancel()" );

    }

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

// AddToQueue

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

//

void CImageComposerAO::AddToQueue( const RArray<TItemId>& aItems, TBool aForce )

    {

    WRITELOG( "CImageComposerAO::AddToQueue()" );

    // check if we should skip some items

    const TInt itemsCount = aItems.Count();

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

        {

        const TInt res = iNextItemsSkip.FindInOrder( aItems[i],

        		TLinearOrder<TItemId>( CImageComposerAO::CompareTItemIds ) );

        if ( res != KErrNotFound && res >= 0 )

            {

            RArray<TItemId> objectId;

            objectId.Append( aItems[i] );

            TRAP_IGNORE( iMdEHarvesterSession->ResetPendingL( objectId ) );

            iNextItemsSkip.Remove( res );

            if( iNextItemsSkip.Count() == 0 )

            	{

            	iNextItemsSkip.Compress();

            	}

            objectId.Close();

            }

        else

            {

            iItemQueue.Append( aItems[i] );

            if ( aForce )

            	{

            	iForceObjectIds.Append( aItems[i] );

            	}

            }

        }

    if ( iNextRequest == ERequestReady )

    	{

    	SetNextRequest( ERequestGetObject );

    	}

    }

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

// IsComposingComplete()

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

//

TBool CImageComposerAO::IsComposingComplete()

    {

    WRITELOG( "CImageComposerAO::IsComposingComplete()" );

    return iNextRequest == ERequestReady;

    }

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

// SetSession

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

//

void CImageComposerAO::SetSession( CMdESession* aSession )

    {

    WRITELOG( "CImageComposerAO::SetSession()" );

    iSession = aSession;

    iExifUtil->SetSession(iSession);

    if( iSession )

    	{

    	iDefaultNamespace = NULL;

    	TRAP_IGNORE( iDefaultNamespace = &iSession->GetDefaultNamespaceDefL() );

    	TRAP_IGNORE( iImageObjectDef = &iDefaultNamespace->GetObjectDefL( 

    			Image::KImageObject ) );

    	TRAP_IGNORE( iObjectDef = &iDefaultNamespace->GetObjectDefL( 

    			Object::KBaseObject ) );

    	TRAP_IGNORE( iLocationObjectDef = &iDefaultNamespace->GetObjectDefL( 

    			Location::KLocationObject ) );

		iMdEHarvesterSession = NULL;

    	TRAP_IGNORE( iMdEHarvesterSession 

    	        = CMdEHarvesterSession::NewL ( *iSession ));

    	}

    }

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

// RemoveSession

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

//

void CImageComposerAO::RemoveSession()

    {

    iSession = NULL;

    iExifUtil->SetSession( NULL );

    delete iMdEHarvesterSession;

    iMdEHarvesterSession = NULL;

    iDefaultNamespace = NULL;

    iImageObjectDef = NULL;

    iObjectDef = NULL;

    iLocationObjectDef = NULL;

    }

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

// RunL

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

//

void CImageComposerAO::RunL()

    {

    WRITELOG( "CImageComposerAO::RunL()" );

    User::LeaveIfError( iStatus.Int() );

    if ( !iDefaultNamespace && iSession )

        {

        iDefaultNamespace = &iSession->GetDefaultNamespaceDefL();

        }

    switch ( iNextRequest )

        {

        case ERequestGetObject:

            {

            if( iItemQueue.Count() <= 0 )

            	{

                iItemQueue.Compress();

            	SetNextRequest( ERequestReady );

            	}

            else

            	{

            	TItemId mdeObjectId = KNoId;

	            TRAPD( err, GetObjectFromMdeL( mdeObjectId ) );

	            if ( err == KErrNone )

	                {    

	                SetNextRequest( ERequestCompose );

	                }

	            // if object does not exists, find next

	            else if ( err == KErrNotFound || err == KErrAbort )

	                 {

	                 if ( err == KErrAbort && mdeObjectId != KNoId )

	                	 {

		                 RArray<TItemId> objectId;

		                 objectId.Append( mdeObjectId );

		                 CleanupClosePushL( objectId );

		                 iMdEHarvesterSession->ResetPendingL( objectId );

		                 CleanupStack::PopAndDestroy( &objectId );

	                	 }

	                 SetNextRequest( ERequestGetObject );

	                 }

	            // something goes really wrong

	            else

	                 {

	                 User::Leave( err );

	                 }

            	}

            }

            break;

        case ERequestCompose:

            {

            ComposeL();

            if ( iMdeObject )

                {

                RArray<TItemId> objectId;

                objectId.Append( iMdeObject->Id() );

                TRAP_IGNORE( iMdEHarvesterSession->ResetPendingL( objectId ) );

                objectId.Close();

                delete iMdeObject;

                iMdeObject = NULL;

                }

            }

            break;

        case ERequestReady:

            {

            iForceObjectIds.Compress();

            }

            break;

        default:

            {

            User::Leave( KErrUnknown );

            }

            break;

        }

    }

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

// RunError

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

//

#ifdef _DEBUG

TInt CImageComposerAO::RunError( TInt aError )

#else

TInt CImageComposerAO::RunError( TInt )

#endif

    {

    WRITELOG1( "CImageComposerAO::RunError() - error code: %d", aError );

    if ( iMdeObject && iSession )

    	{

    	TRAP_IGNORE( iSession->CancelObjectL( *iMdeObject ) );

    	}

    SetNextRequest( ERequestGetObject );

    return KErrNone;

    }

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

// GetObjectFromMde

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

//

void CImageComposerAO::GetObjectFromMdeL(TItemId& aMdEObjectId)

    {

#ifdef _DEBUG

    _LIT( KPanicCategoryNsd, "NSD=NULL" );

    _LIT( KPanicCategoryOd,  "OD=NULL" );

    _LIT( KPanicCategoryId,  "ID=NULL" );

    _LIT( KPanicCategoryLd,  "LD=NULL" );

    __ASSERT_DEBUG( iDefaultNamespace, User::Panic( KPanicCategoryNsd, KErrBadHandle ) );

    __ASSERT_DEBUG( iObjectDef, User::Panic( KPanicCategoryOd,  KErrBadHandle ) );

    __ASSERT_DEBUG( iImageObjectDef, User::Panic( KPanicCategoryId,  KErrBadHandle ) );

    __ASSERT_DEBUG( iLocationObjectDef, User::Panic( KPanicCategoryLd,  KErrBadHandle ) );

#endif    

    WRITELOG( "CImageComposerAO::GetObjectFromMdeL() - start" );

    if ( !iSession )

    	{

    	WRITELOG( "CImageComposerAO::GetObjectFromMdeL() - iSession is NULL" );

    	User::Leave( KErrSessionClosed );

    	}

    TItemId objectId = KNoId;

    // get the object id from queue

    if( iItemQueue.Count() > 0 )

    	{

    	objectId = iItemQueue[0];

    	aMdEObjectId = objectId;

    	iItemQueue.Remove( 0 );

    	}

    // get object from db (NULL if not found)

    CMdEObject* mdeObject = iSession->GetObjectL( objectId, *iImageObjectDef );

    CleanupStack::PushL( mdeObject );

    if ( !mdeObject )

        {

        WRITELOG1( "CImageComposerAO::GetObjectFromMdeL() - could not find object id %d", objectId );

        User::Leave( KErrNotFound );

        }

    TInt force;

    force = iForceObjectIds.Find( objectId );

    if ( force != KErrNotFound )

    	{

    	iForceObjectIds.Remove( force );

    	if( iForceObjectIds.Count() == 0 )

    		{

    		iForceObjectIds.Compress();

    		}

    	}

    else

    	{

	    // check if file's and object's last modified dates are equal

	    CMdEPropertyDef& lastModifiedDatePropDef = mdeObject->Def().GetPropertyDefL( 

	    		Object::KLastModifiedDateProperty );

	    CMdEProperty* lastModifiedDateProp = NULL;

	    mdeObject->Property( lastModifiedDatePropDef, lastModifiedDateProp );

	    if( lastModifiedDateProp )

	    	{

	    	TTime time = ((CMdETimeProperty*)lastModifiedDateProp)->Value();

	    	TEntry entry;

	    	TInt error = iFs.Entry( mdeObject->Uri(), entry );

	    	if( error != KErrNone || entry.iModified == time )

	    		{

	    		User::Leave( KErrAbort );

	    		}

	    	}

	    else

	    	{

	    	User::Leave( KErrNotFound );

	    	}   

    	}

    CleanupStack::Pop( mdeObject );

    iMdeObject = mdeObject;

    WRITELOG( "CImageComposerAO::GetObjectFromMdeL() - end" );

    }

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

// ComposeL

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

//

void CImageComposerAO::ComposeL()

    {

#ifdef _DEBUG

    _LIT( KPanicCategoryNsd, "NSD=NULL" );

    _LIT( KPanicCategoryOd,  "OD=NULL" );

    _LIT( KPanicCategoryId,  "ID=NULL" );

    _LIT( KPanicCategoryLd,  "LD=NULL" );

    __ASSERT_DEBUG( iDefaultNamespace, User::Panic( KPanicCategoryNsd, KErrBadHandle ) );

    __ASSERT_DEBUG( iObjectDef, User::Panic( KPanicCategoryOd,  KErrBadHandle ) );

    __ASSERT_DEBUG( iImageObjectDef, User::Panic( KPanicCategoryId,  KErrBadHandle ) );

    __ASSERT_DEBUG( iLocationObjectDef, User::Panic( KPanicCategoryLd,  KErrBadHandle ) );

#endif    

#ifdef _DEBUG    

    WRITELOG( "CImageComposerAO::ComposeL()" );

    WRITELOG1( "CImageComposerAO::ComposeL() - Compose Start Object ID: %d", iMdeObject->Id() );

#endif

    if ( !iSession )

    	{

    	WRITELOG( "CImageComposerAO::ComposeL() - iSession is NULL!" );

    	User::Leave( KErrSessionClosed );

    	}

    // 1. Read Exif image from the file to a buffer...

    RFile64 file;

    CleanupClosePushL( file );

    WRITELOG( "CImageComposerAO::ComposeL() - open file for reading" );

    User::LeaveIfError( file.Open( iFs, iMdeObject->Uri(), EFileRead ) );

    TInt64 dataSize = 0;

    file.Size( dataSize );

    HBufC8* exif = HBufC8::NewL( dataSize );

    CleanupStack::PushL( exif );

    TPtr8 exifPtr = exif->Des();

    User::LeaveIfError( file.Read( exifPtr ) );

    CleanupStack::Pop( exif );             // exif needs to be popped and pushed again

    CleanupStack::PopAndDestroy( &file );  // to get file out of CleanupStack

    CleanupStack::PushL( exif );

    HBufC8* modifiedExif = NULL;

    iExifUtil->ComposeExifDataL(*iMdeObject, exifPtr, modifiedExif);

    // modifiedExif is NULL if no changes were made

    if ( modifiedExif )

        {

        CleanupStack::PushL( modifiedExif );

        if ( !iMdeObject->OpenForModifications() )

            {

            const TItemId objectId = iMdeObject->Id();

            delete iMdeObject;

            iMdeObject = NULL;

            iMdeObject = iSession->OpenObjectL( objectId, *iImageObjectDef );

            if ( !iMdeObject )

                {

                User::Leave( KErrAccessDenied );

                }

            }

    	// set position to begin of file

        WRITELOG( "CImageComposerAO::ComposeL() - open file for writing" );

        User::LeaveIfError( file.Open( iFs, iMdeObject->Uri(), EFileWrite ) );

        CleanupClosePushL( file );

        TInt64 pos = 0;

        WRITELOG( "CImageComposerAO::ComposeL() - seek to position 0" );

        User::LeaveIfError( file.Seek( ESeekStart, pos ) );

        WRITELOG( "CImageComposerAO::ComposeL() - write buffer (exif) to file" );

        User::LeaveIfError( file.Write( modifiedExif->Des(), modifiedExif->Des().Length() ) );

        CleanupStack::PopAndDestroy( 2, modifiedExif ); // file, modifiedExif

        TEntry fileEntry;

        iFs.Entry( iMdeObject->Uri(), fileEntry );

        WRITELOG( "CImageComposerAO::ComposeL() - store Size and LastModifiedDate properties to MDE" );

        CMdEPropertyDef& sizePropDef = iImageObjectDef->GetPropertyDefL( Object::KSizeProperty );

            {

            CMdEProperty* sizeProp = NULL;