/*

* Copyright (c) 2007-2009 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:  ESMR esmricalviewer implementation

*

*/

// INCLUDE FILES

#include "emailtrace.h"

#include "cesmricalviewercmdhandler.h"

#include "cesmricalvieweropenmrcmd.h"

#include "cesmricalviewercanviewmr.h"

#include "cesmricalviewerresolvemrmethodsync.h"

#include "cesmricalviewerresolvemrmethodasync.h"

#include "cesmricalviewerresponsetomrcmd.h"

#include "cesmricalviewerremovemrfromcalcmd.h"

#include <calsession.h>

//<cmail>

#include "esmricalvieweropcodes.hrh"

#include "esmricalviewerdefs.hrh"

//</cmail>

#include <eikenv.h>

/// Unnamed namespace for local definitions

namespace {

#ifdef _DEBUG

// Panic literal

_LIT( KESMRIcalViewerCmdHandler, "ESMRIcalViewerCmdHandler" );

enum TESMRIcalViewerCmdHandlerPanic

    {

    EInvalidCommand = 0, // Trying to execute invalid command

    EInvalidObserverCall

    };

void Panic( TESMRIcalViewerCmdHandlerPanic aPanic )

    {

    User::Panic( KESMRIcalViewerCmdHandler, aPanic );

    }

#endif // _DEBUG

}  // namespace

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

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

// CESMRIcalViewerCmdHandler::CESMRIcalViewerCmdHandler

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

//

CESMRIcalViewerCmdHandler::CESMRIcalViewerCmdHandler(

        MESMRIcalViewerCallback& aCallback )

:   iCallback( aCallback )

    {

    FUNC_LOG;

    //do nothing

    }

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

// CESMRIcalViewerCmdHandler::~CESMRIcalViewerCmdHandler

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

//

CESMRIcalViewerCmdHandler::~CESMRIcalViewerCmdHandler()

    {

    FUNC_LOG;

    CancelOperation();

    delete iCommand;

    delete iMessage;

    if ( iMailClient )

        {

        iMailClient->Close();

        }

    delete iCalSession;

    }

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

// CESMRIcalViewerCmdHandler::NewL

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

//

CESMRIcalViewerCmdHandler* CESMRIcalViewerCmdHandler::NewL(

        MESMRIcalViewerCallback& aCallback )

    {

    FUNC_LOG;

    CESMRIcalViewerCmdHandler* self =

            new (ELeave) CESMRIcalViewerCmdHandler( aCallback );

    CleanupStack::PushL( self );

    self->ConstructL();

    CleanupStack::Pop( self );

    return self;

    }

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

// CESMRIcalViewerCmdHandler::ConstructL

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

//

void CESMRIcalViewerCmdHandler::ConstructL()

    {

    FUNC_LOG;

    iCalSession = CCalSession::NewL();

    iCalSession->OpenL( KNullDesC );

    iMailClient = CFSMailClient::NewL();

    }

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

// CESMRIcalViewerCmdHandler::ExecuteCommandL

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

//

void CESMRIcalViewerCmdHandler::ExecuteCommandL(

        TESMRIcalViewerOperationType aOpType,

        MESMRIcalViewerObserver* aObserver,

        CFSMailMessage& aMessage )

    {

    FUNC_LOG;

    ExecuteCommandL( aOpType, aObserver, aMessage, NULL );

    }

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

// CESMRIcalViewerCmdHandler::ExecuteCommandL

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

//

void CESMRIcalViewerCmdHandler::ExecuteCommandL(

        TESMRIcalViewerOperationType aOpType,

        MESMRIcalViewerObserver* aObserver,

        CFSMailMessage& aMessage,

        TAny* aParam )

    {

    FUNC_LOG;

    TRAPD( err, ExecuteCommandInternalL( aOpType,

                                        aObserver,

                                        aMessage,

                                        aParam ) );

    if ( KErrNone != err && EIdle != iState )

        {

        // Make sure that error is notified to caller in all cases

        if ( iObserver)

            {

            iResult.iMessage = &aMessage;

            iResult.iResultCode = err;

            iResult.iOpType = aOpType;        

            iObserver->OperationError( iResult );

            }

        iState = EIdle;

        }

    }

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

// CESMRIcalViewerCmdHandler::CancelOperation

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

//

void CESMRIcalViewerCmdHandler::CancelOperation()

    {

    FUNC_LOG;

    if ( iCommand )

        {

        iCommand->CancelCommand();

        }

    iState = EIdle;

    }

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

// CESMRIcalViewerCmdHandler::OperationCompleted

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

//

void CESMRIcalViewerCmdHandler::OperationCompleted(

        TIcalViewerOperationResult aResult )

    {

    FUNC_LOG;

    __ASSERT_DEBUG( iCommand, Panic(EInvalidObserverCall) );

    __ASSERT_DEBUG(

            iCommand->OperationType() == aResult.iOpType,

            Panic(EInvalidObserverCall) );

    if ( iObserver )

        {

        aResult.iOpType = iCommand->OperationType();

        iObserver->OperationCompleted( aResult );

        }

    iState = EIdle;

    }

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

// CESMRIcalViewerCmdHandler::OperationError

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

//

void CESMRIcalViewerCmdHandler::OperationError(

                TIcalViewerOperationResult aResult )

    {

    FUNC_LOG;

    __ASSERT_DEBUG( iCommand, Panic(EInvalidObserverCall) );

    __ASSERT_DEBUG(

            iCommand->OperationType() == aResult.iOpType,

            Panic(EInvalidObserverCall) );

    if ( iObserver )

        {

        aResult.iOpType = iCommand->OperationType();

        iObserver->OperationError( aResult );

        }

    iState = EIdle;

    }

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

// CESMRIcalViewerCmdHandler::ExecuteCommandInternalL

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

//

void CESMRIcalViewerCmdHandler::ExecuteCommandInternalL( 

        TESMRIcalViewerOperationType aOpType,

        MESMRIcalViewerObserver* aObserver,

        CFSMailMessage& aMessage,

        TAny* aParam )

    {

    FUNC_LOG;

    if ( EExecuting == iState )

        {

        User::Leave( KErrInUse );

        }

    delete iCommand; iCommand = NULL;

    iState = EExecuting;

    iObserver = aObserver;

    // Get own copy of the message before executing commands

    delete iMessage; iMessage = NULL;

    iMessage = iMailClient->GetMessageByUidL(

            aMessage.GetMailBoxId(),

            aMessage.GetFolderId(),

            aMessage.GetMessageId(),

            EFSMsgDataStructure );

    switch ( aOpType )

        {

        case EESMRViewLaunch:

            {

            iCommand = CESMRIcalViewerOpenMRCmd:: NewL(

                    iCallback,

                    *iMailClient,

                    *iCalSession );

            }

            break;

        case EESMRCanViewMR:

            {

            TBool* flag = static_cast<TBool*>( aParam );

            iCommand = CESMRIcalViewerCanViewMsgCmd:: NewL(

                    *iCalSession,

                    *flag );

            }

            break;

        case EESMRResolveMRMethod:

            {

            iCommand = CESMRIcalViewerResolveMRMethodASyncCmd::NewL(

                                *iCalSession,

                                *iMailClient );

            }

            break;

        case EESMRResolveMRMethodSync:

            {

            TESMRMeetingRequestMethod* mrMethod =

                    static_cast<TESMRMeetingRequestMethod*>( aParam );

            iCommand = CESMRIcalViewerResolveMRMethodSyncCmd::NewL(

                                    *iCalSession,

                                    *iMailClient,

                                    *mrMethod );

            }

            break;

        case EESMRResponseToMR:

            {

            TESMRAttendeeStatus* attendeeStatus =

                    static_cast<TESMRAttendeeStatus*>( aParam );

            iCommand = CESMRIcalViewerResponseToMRCmd::NewL(

                            iCallback,

                            *iCalSession,

                            *iMailClient,

                            *attendeeStatus);

            }

            break;

        case EESMRRemoveMR:

            {

            iCommand = CESMRIcalViewerRemoveMRFromCalCmd::NewL(

                            *iCalSession,

                            *iMailClient );

            }

            break;

        default:

            break;

        }

    __ASSERT_DEBUG( iCommand, Panic( EInvalidCommand) );

    iCommand->ExecuteCommandL( *iMessage, *this );

    }

// EOF