/*

 * 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:  

 *

 */

// System include files

#include <ecom/ecom.h>

#include <ecom/implementationinformation.h>

// User include files

#include "hscontentcontrolfactory.h"

#include "hscontentcontrolecomlistener.h"

// Local constants

// Content controller ECom interface UID

const TUid KInterfaceUidContentController = { 0x20026F51 };

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

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

// CleanupResetAndDestroy()

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

//

template<class T>

static void CleanupResetAndDestroy( TAny* aObj )

    {

    if( aObj )

        {

        static_cast<T*>( aObj )->ResetAndDestroy();

        }

    }

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

// CleanupResetAndDestroyPushL

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

//

template<class T>

static void CleanupResetAndDestroyPushL(T& aArray)

    {

    CleanupStack::PushL( TCleanupItem( &CleanupResetAndDestroy<T>, &aArray ) );

    }

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

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

// CHsContentControlFactory::NewL()

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

//

EXPORT_C CHsContentControlFactory* CHsContentControlFactory::NewL()

    {

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

    CleanupStack::PushL( self );

    self->ConstructL();

    CleanupStack::Pop( self );

    return self;

    }

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

// CHsContentControlFactory::ConstructL()

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

//

void CHsContentControlFactory::ConstructL()

    {

    iHsContentControlEComListener = 

            CHsContentControlEComListener::NewL( *this );

    REComSession::ListImplementationsL( 

            KInterfaceUidContentController, iImplArray );

    }

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

// CHsContentControlFactory::CHsContentControlFactory()

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

//

CHsContentControlFactory::CHsContentControlFactory()

    {

    }

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

// CHsContentControlFactory::~CHsContentControlFactory()

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

//

EXPORT_C CHsContentControlFactory::~CHsContentControlFactory()

    {

    iImplArray.ResetAndDestroy();

    iImplArray.Close();

    iHsContentControlUis.ResetAndDestroy();

	delete iHsContentControlEComListener;

    }

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

// CHsContentControlFactory::GetHsContentController()

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

//

EXPORT_C MHsContentControlUi* CHsContentControlFactory::GetHsContentController(

    const TDesC8& aControlType )    

    {

    MHsContentControlUi* retval( FindHsContentController( aControlType ) ); 

    if ( !retval )

        {

        TRAP_IGNORE(

            // Get implementations via ECom

            RImplInfoPtrArray plugins;

            CleanupResetAndDestroyPushL( plugins );

            REComSession::ListImplementationsL( 

                KInterfaceUidContentController, plugins );

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

                {

                CImplementationInformation* information( plugins[i] );

                if ( information->OpaqueData().CompareF( aControlType ) == 0 )

                    {

                    CHsContentControlUi* ccUi = CHsContentControlUi::NewL( 

                        information->ImplementationUid() );

                    CleanupStack::PushL( ccUi );

                    ccUi->SetContentControlTypeL( information->OpaqueData() );

                    iHsContentControlUis.AppendL( ccUi );

                    CleanupStack::Pop(); //ccUi

                    retval = ccUi;

                    // All done

                    break;

                    }

                }

            CleanupStack::PopAndDestroy(); // plugins

            ); // TRAP_IGNORE

        }

    return retval;

    }

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

// CHsContentControlFactory::FindHsContentController()

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

//

MHsContentControlUi* CHsContentControlFactory::FindHsContentController(

    const TDesC8& aControlType )

    {       

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

        {

        CHsContentControlUi* cc( iHsContentControlUis[ i ] );

            {

            return cc;

            } 

        }

    return NULL;

    }

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

// CHsContentControlFactory::HandleEComChangeEvent()

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

//

void CHsContentControlFactory::HandleEComChangeEvent()

    {

    // ignore event if no plugin loaded.

    if ( iHsContentControlUis.Count() > 0 )

        {

        TRAP_IGNORE( CheckPluginChangesL(); );

        }

    }

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

// CHsContentControlFactory::CheckPluginChangesL

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

//

void CHsContentControlFactory::CheckPluginChangesL()

    {

    // Array to return all implementations in an interface

    RImplInfoPtrArray plugInArray;

    CleanupResetAndDestroyPushL( plugInArray );

    // Get the list of all implementations.

    REComSession::ListImplementationsL( 

            KInterfaceUidContentController, plugInArray );

    TUid uid( KNullUid );

    TBool done( EFalse );

    // If an implementation is not present in present in the plugInArray then its removed. 

    for( TInt index( iImplArray.Count() - 1 ); index >= 0 && !done; --index )

        {

        uid = plugInArray[ index ]->ImplementationUid();

        CImplementationInformation* implInfo = 

                FindPluginImplInfo( uid, plugInArray );

        if ( implInfo && PluginUpgradeDowngrade( *implInfo ) )

            {

            done = ETrue;

            }

        else

            {

            // check if ContenControlUi is loaded, unload it

            for( TInt innerIndex( iHsContentControlUis.Count() - 1 );

                    innerIndex >= 0 && !done; --innerIndex )

                {

                CHsContentControlUi* cc( iHsContentControlUis[ innerIndex ] );

                if ( cc && cc->ImplUid() == uid )

                    {

                    iHsContentControlUis.Remove( innerIndex );

                    delete cc;

                    cc = NULL;

                    done = ETrue;

                    }

                }

            done = ETrue;

            }

        }

    // Cleanup.

    CleanupStack::PopAndDestroy(); // plugInArray

    // Reset the array and refresh the plugin list.

    iImplArray.ResetAndDestroy();

    iImplArray.Close();    

    REComSession::ListImplementationsL( 

            KInterfaceUidContentController, iImplArray );

    }

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

// CHsContentControlFactory::FindPluginImplInfo

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

//

CImplementationInformation* CHsContentControlFactory::FindPluginImplInfo( 

        const TUid& aUid, const RImplInfoPtrArray& aPlugInArray )

    {

    CImplementationInformation* implInfo( NULL );

    for( TInt index( aPlugInArray.Count() - 1 ); index >= 0; --index )

        {

        implInfo = aPlugInArray[ index ];

        if( aUid == implInfo->ImplementationUid() )

            {

            break;

            }

        }

    return implInfo;

    }

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

// CHsContentControlFactory::PluginUpgradeDowngrade

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

//

TBool CHsContentControlFactory::PluginUpgradeDowngrade( 

        const CImplementationInformation& aPluginImplInfo )

    {

    // Check for each plugin in the array if the version matches with the plugin we have

    TUid uid = aPluginImplInfo.ImplementationUid();

    for( TInt outterIndex( iImplArray.Count() - 1 ); outterIndex >= 0; --outterIndex )

        {

        if( uid == iImplArray[ outterIndex ]->ImplementationUid() )

            {

            if( aPluginImplInfo.Version() != iImplArray[ outterIndex ]->Version() ||

               aPluginImplInfo.Drive() != iImplArray[ outterIndex ]->Drive() ||

               aPluginImplInfo.DisplayName() != iImplArray[ outterIndex ]->DisplayName() ||

               aPluginImplInfo.OpaqueData() != iImplArray[ outterIndex ]->OpaqueData() )

                {

                // If control reaches here, it means we either have an upgrade or downgrade.

                // check if we have loaded this plugin, reload it if found in array.

                for( TInt innerIndex( iHsContentControlUis.Count() - 1 ); 

                        innerIndex >= 0; --innerIndex )

                    {

                    CHsContentControlUi* cc( iHsContentControlUis[ innerIndex ] );

                    if ( cc && cc->ImplUid() == uid )

                        {

                        iHsContentControlUis.Remove( innerIndex );

                        delete cc;

                        cc = NULL;

                        innerIndex = KErrNotFound;

                        }

                    }                    

                return ETrue;

                }

            }

        }

    return EFalse;

    }

// End of file