/*

* Copyright (c) 2006-2007 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:  Task for making MDS querys

*

*/

#include <e32base.h>

#include <mdeconstants.h>

#include <thumbnailmanager.h>

#include "thumbnailmdsquerytask.h"

#include "thumbnailmanagerconstants.h"

#include "thumbnaillog.h"

#include "thumbnailserver.h"

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

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

// CThumbnailMDSQueryTask::CThumbnailMDSQueryTask()

// C++ default constructor can NOT contain any code, that might leave.

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

//

CThumbnailMDSQueryTask::CThumbnailMDSQueryTask(

        CThumbnailTaskProcessor& aProcessor, TInt aPriority, CMdESession* aMdESession, CThumbnailServer& aServer): 

    {

    TN_DEBUG2( "CThumbnailMDSQueryTask(0x%08x)::CThumbnailMDSQueryTask()", this );

    }

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

// CThumbnailMDSQueryTask::~CThumbnailMDSQueryTask()

// Destructor.

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

//

CThumbnailMDSQueryTask::~CThumbnailMDSQueryTask()

    {

    TN_DEBUG2( "CThumbnailMDSQueryTask(0x%08x)::~CThumbnailMDSQueryTask()", this);

    if (iQuery)

        {

        iQuery->Cancel();

        delete iQuery;

        iQuery = NULL;

        }

    }

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

// CThumbnailMDSQueryTask::HandleQueryNewResults()

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

//

void CThumbnailMDSQueryTask::HandleQueryNewResults( CMdEQuery& /*aQuery*/,

                                               const TInt /*aFirstNewItemIndex*/,

                                               const TInt /*aNewItemCount*/ )

    {

    // No implementation required

    }

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

// CThumbnailMDSQueryTask::HandleQueryCompleted()

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

//

void CThumbnailMDSQueryTask::HandleQueryCompleted( CMdEQuery& /*aQuery*/, const TInt aError )

    {

    TN_DEBUG3( "CThumbnailMDSQueryTask::HandleQueryCompleted(0x%08x), aError == %d", this, aError );

    // if no errors in query

    if (aError == KErrNone && iQuery && iQuery->Count() > 0)

        {

        if( iQueryType == EURI )

            {

            const CMdEObject* object = &iQuery->Result(0);

            TN_DEBUG2( "CThumbnailMDSQueryTask::HandleQueryCompleted() - URI = %S", &object->Uri() );

            // return path to client side       

            if( iDelete )

                {

                TN_DEBUG2( "CThumbnailMDSQueryTask::HandleQueryCompleted() delete %S", &iUri );

                TRAP_IGNORE( iServer.DeleteThumbnailsL( iUri ) );

                }

            else

                {

                ReturnPath(object->Uri());

                }

            }

        else

            {

            TN_DEBUG1( "CThumbnailMDSQueryTask::HandleQueryCompleted() - Don't ever come here!" );

            if (ClientThreadAlive())

                {  

                Complete( KErrNotFound );

                ResetMessageData();

                }

            __ASSERT_DEBUG((EFalse), User::Panic(_L("CThumbnailMDSQueryTask::HandleQueryCompleted()"), KErrNotSupported));

            }

        }

    else

        {

        TN_DEBUG1( "CThumbnailMDSQueryTask::HandleQueryCompleted() - No results." );

        if(!iDelete)

            {

            if (ClientThreadAlive())

                {  

                Complete( KErrNotFound );

                ResetMessageData();

                }

            }

        }

   }

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

// CThumbnailMDSQueryTask::StartL()

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

//

void CThumbnailMDSQueryTask::StartL()

    {

    TN_DEBUG2( "CThumbnailMDSQueryTask(0x%08x)::StartL()", this );

    CThumbnailTask::StartL();

    if (iMessage.Handle())

        {

        // start query

        iQuery->FindL();

        }

    else

        {

        // no point to continue

        Complete( KErrCancel );

        ResetMessageData();

        }

    }

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

// CThumbnailMDSQueryTask::RunL()

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

//

void CThumbnailMDSQueryTask::RunL()

    {

    // No implementation required

    TN_DEBUG2( "CThumbnailMDSQueryTask(0x%08x)::RunL()", this );

    }

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

// CThumbnailMDSQueryTask::DoCancel()

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

//

void CThumbnailMDSQueryTask::DoCancel()

    {

    TN_DEBUG2( "CThumbnailMDSQueryTask(0x%08x)::DoCancel()", this );

    iQuery->Cancel();

    }

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

// CThumbnailMDSQueryTask::QueryPathByIdL()

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

//

void CThumbnailMDSQueryTask::QueryPathByIdL(TThumbnailId aId, TBool aDelete)

    {

    TN_DEBUG1( "CThumbnailMDSQueryTask()::QueryPathByIdL()");

    iQueryType = EURI;

    iDelete = aDelete;

    CMdENamespaceDef* defNamespace = &iMdESession->GetDefaultNamespaceDefL();

    CMdEObjectDef& objDef = defNamespace->GetObjectDefL( MdeConstants::Object::KBaseObject );

    delete iQuery;

    iQuery = NULL;

    iQuery = iMdESession->NewObjectQueryL( *defNamespace, objDef, this );

	if(iQuery)

		{

	    iQuery->SetResultMode( EQueryResultModeItem );

    	CMdELogicCondition& rootCondition = iQuery->Conditions();

	    rootCondition.SetOperator( ELogicConditionOperatorOr );

	    // add ID condition

    	rootCondition.AddObjectConditionL( aId );

		}

    }

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

// CThumbnailMDSQueryTask::ReturnPath()

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

//

void CThumbnailMDSQueryTask::ReturnPath(const TDesC& aUri)

    {

    if ( ClientThreadAlive() )

        {

        // add path to message

        TInt ret = iMessage.Read( 0, iRequestParams );      

        if(ret == KErrNone)

            {

            TThumbnailRequestParams& params = iRequestParams();

            params.iFileName = aUri;

            ret = iMessage.Write( 0, iRequestParams );

            }

        // complete the message with a code from which client side

        // knows to make a new request using the path

        Complete( KThumbnailErrThumbnailNotFound );

        ResetMessageData();

        }

    }

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

// CThumbnailMDSQueryTask::SetUpdateToDb()

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

//

void CThumbnailMDSQueryTask::SetUpdateToDb(const TBool& aUpdateToDb )

    {

    TN_DEBUG2( "CThumbnailMDSQueryTask()::SetCompleteTask() aUpdateToDb == %d", aUpdateToDb);

    iUpdateToDb = aUpdateToDb;

    }