diff -r d189ee25cf9d -r 3533d4323edc meetingrequest/mricalviewer/src/cesmricalviewercmdhandler.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/meetingrequest/mricalviewer/src/cesmricalviewercmdhandler.cpp	Wed Sep 01 12:28:57 2010 +0100
@@ -0,0 +1,319 @@
+/*
+* 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 "cfsmailclient.h"
+#include "esmricalvieweropcodes.hrh"
+#include "esmricalviewerdefs.hrh"
+//</cmail>
+#include <eikenv.h>
+
+/// Unnamed namespace for local definitions
+namespace {
+
+// Panic literal
+_LIT( KESMRIcalViewerCmdHandler, "ESMRIcalViewerCmdHandler" );
+
+enum TESMRIcalViewerCmdHandlerPanic
+    {
+    EInvalidCommand = 0, // Trying to execute invalid command
+    EInvalidObserverCall
+    };
+
+void Panic( TESMRIcalViewerCmdHandlerPanic aPanic )
+    {
+    User::Panic( KESMRIcalViewerCmdHandler, aPanic );
+    }
+
+}  // 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_ALWAYS( iCommand, Panic( EInvalidCommand) );
+    iCommand->ExecuteCommandL( *iMessage, *this );
+    }
+
+// EOF
+