/*

* Copyright (c) 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:

* Main entry point of EmailServerMonitor

*

*/

//  Include Files  

#include <e32base.h>

#include <e32std.h>

#include <e32des16.h>                   // Descriptors

#include <bacline.h>                    // CCommandLineArguments

#include "emailtrace.h"

#include "emailshutdownconst.h"

#include "emailservermonitorconst.h"

#include "emailservermonitorutilities.h"

#include "emailservermonitor.h"

#include "emailshutter.h"

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

// Defines operation mode by parsing command line parameters

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

//

LOCAL_C TEmailServerMonitorMode ParseCommandLineArgumentsL()

    {

    FUNC_LOG;

    TEmailServerMonitorMode mode = EEsmModeNormal;

    CCommandLineArguments* args = CCommandLineArguments::NewLC();

    // Check if some command line arguments were given

    if( args->Count() > 1 )

       {

       TPtrC argumentPtr( args->Arg(1) );

       if( argumentPtr == KEmailShutdownHandlerArgOnlyShutter )

           {

           mode = EEsmModeOnlyShutter;

           }

       else if( argumentPtr == KEmailShutdownHandlerArgRestart )

           {

           mode = EEsmModeRestartAfterInstallation;

           }

       }

    CleanupStack::PopAndDestroy(args);

    INFO_1( "TEmailServerMonitorMode: %d", mode );

    return mode;

    }

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

// Starts active scheduler, runs the needed operations, and then deletes

// the active scheduler when everything is done

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

//

LOCAL_C void DoStartL()

    {

    FUNC_LOG;

    // Create active scheduler (to run active objects)

    CActiveScheduler* scheduler = new (ELeave) CActiveScheduler();

    CleanupStack::PushL(scheduler);

    CActiveScheduler::Install(scheduler);

    TEmailServerMonitorMode mode = ParseCommandLineArgumentsL();

    // Start email shutter functionality

    CEmailShutter* shutter = CEmailShutter::NewLC();

    shutter->StartObservingShutdownEvent();

    CEmailServerMonitor* monitor = NULL;

    if( mode != EEsmModeOnlyShutter )

        {

        // Start email server observing functionality

        monitor = CEmailServerMonitor::NewLC();

        monitor->SetShutter( shutter );

        if( mode == EEsmModeRestartAfterInstallation )

            {

            monitor->SetRestartExternalServicesFlag();

            }

        monitor->Start();

        shutter->SetMonitor( monitor );

        }

    // Complete client's Rendezvous

    RProcess::Rendezvous( KErrNone );

    // Start asynchronous services

    CActiveScheduler::Start();

    INFO( "ActiveScheduler stopped, closing down" );

    // Cancel any pending requests and delete handler objects

    // after active scheduler is stopped

    if( monitor )

        {

        monitor->Cancel();

        CleanupStack::PopAndDestroy( monitor );

        }

    shutter->Cancel();

    CleanupStack::PopAndDestroy( shutter );

    // Delete active scheduler

    CleanupStack::PopAndDestroy( scheduler );

    }

// ======== GLOBAL FUNCTIONS ========

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

// Executable main entry point

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

//

GLDEF_C TInt E32Main()

    {

    FUNC_LOG;

    __UHEAP_MARK;

    RProcess ownProcess;

    TSecureId ownUid = ownProcess.SecureId();

    INFO_1( "%S", &ownProcess.FileName() );

    ownProcess.Close();

    // Just exit if there is another process already running

    if( IsProcessRunning( ownUid ) )

        {

        INFO( "Another instance of Email Server Monitor already running!" );

        }

    else

        {

        // Rename thread for debug purposes, return code can be ignored

        RThread::RenameMe( KEmailServerMonitorName );

        // Create the cleanup stack

        CTrapCleanup* cleanup = NULL;

        cleanup = CTrapCleanup::New();

        if ( !cleanup )

            {

            // No errors leaked outside, return success.

            INFO( "Could not create clean up stack!" );

            return KErrNone;

            }

        // Run application code inside TRAP harness

        TRAPD( mainError, DoStartL() );

        if( mainError != KErrNone )

            {

            ERROR_1( mainError, "Email Server Monitor main error code: %d", mainError );

            }

        delete cleanup;

        }

    INFO( "Email Server Monitor finished!" );

    __UHEAP_MARKEND;

    return KErrNone;

    }