/*

* Copyright (c) 2006 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: 

*     This is the class that is in control most of the time.

*     It instantiates CMsengScannerBase derived scanner classes

*     to do the job.

*

*/

// SYSTEM INCLUDES

#include <bautils.h>

#include <mseng.rsg>

// USER INCLUDES

#include "msengscanner.h"

#include "msengfileextscanner.h"

#include "msengfindallscanner.h"

#include "msengregistryscanner.h"

#include "msenguihandler.h"

#include "mseng.h"

// LOCAL CONSTANTS AND MACROS

#ifdef _DEBUG

_LIT(KClassName, "CMsengScanner");

#endif

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

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

// CMsengScanner::CMsengScanner()

//

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

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

CMsengScanner::CMsengScanner(MMsengUIHandler& aUIHandler, CResourceFile& aResFile) :

iUIHandler(aUIHandler), iResFile(aResFile)

    {

    }

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

// CMsengScanner::~CMsengScanner()

//

// Destructor

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

CMsengScanner::~CMsengScanner()

    {

    delete iScanArray;

    delete iFileExtScanner;

    delete iFindAllScanner;

    delete iRegistryScanner;

    }

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

// CMsengScanner::Cancel()

// 

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

//

void CMsengScanner::Cancel()

    {

    iFileExtScanner->Cancel();

    iFindAllScanner->Cancel();

    iRegistryScanner->Cancel();

    TRAP_IGNORE( iUIHandler.QuitL(KErrCancel) );

    }

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

// CMsengScanner::HaveActiveScanners()

// 

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

//

TBool CMsengScanner::HaveActiveScanners() const

    {

    const TBool isActive = 

            (iFileExtScanner && iFileExtScanner->IsActive())

            || (iFindAllScanner && iFindAllScanner->IsActive())

            || (iRegistryScanner && iRegistryScanner->IsActive())

		 ;

	return isActive;

	}

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

// CMsengScanner::ScanL()

// 

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

//

TInt CMsengScanner::ScanL(TDriveNumber aDrive, TInt aNumberOfDataGroups, RFs& aFsSession)

    {

    if(HaveActiveScanners())

        {

        return KErrInUse;

        }

    // Create data structures; delete the old ones

    CMsengInfoArray* infoArray = CMsengInfoArray::NewL( aDrive,

                                                        aNumberOfDataGroups,

                                                        aFsSession, iResFile );

    delete iScanArray;

	iScanArray = infoArray;

    // Do some scanning tasks not include in ScanL

    PreScanL(aDrive, aFsSession);

    // Start the scan by filename extension

    iFileExtScanner = CMsengFileExtScanner::NewL(*this, *iScanArray, aFsSession);

    iFileExtScanner->ScanL(iScanArray->Dirs());

    // Start scanning data dirs (including messages)

    iFindAllScanner = CMsengFindAllScanner::NewL(*this, *iScanArray, aFsSession);

    iFindAllScanner->ScanL(iScanArray->DataDirs());

    // Start the scan from registries

    iRegistryScanner = CMsengRegistryScanner::NewL( aDrive, *this, *iScanArray, aFsSession );

    iRegistryScanner->Scan();

    return KErrNone;

    }

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

// MsengScanner::HandleScannerEventL()

// 

// Handle the events from scanning

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

//

void CMsengScanner::HandleScannerEventL(TScannerEvent aEvent,

                                        const CMsengScannerBase& /*aScanner*/,

                                        TInt aError)

    {

#ifdef __SHOW_RDEBUG_PRINT_

    RDebug::Print(_L("CMsengScanner::HandleScannerEventL() called with event: %d"), aEvent);

#endif // __SHOW_RDEBUG_PRINT_

    switch(aEvent)

        {

        case MMsengScannerObserver::EScannerEventScanComplete:

            // This scanner object has finished all of its scanning.

            // If all the others are finished too,

            // then we tell the UI that scanning is complete.

            if (!HaveActiveScanners())

                {

                iUIHandler.QuitL(KErrNone);

                }

            break;

        case MMsengScannerObserver::EScannerEventScanError:

            // An error has happened

            iUIHandler.ErrorL(aError);

            break;

        default:

            // should never happen

            __ASSERT_DEBUG(EFalse,User::Panic(KClassName, KErrGeneral));

            break;

        }

    }

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

// CMsengScanner::PreScanL()

// 

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

//

void CMsengScanner::PreScanL(TDriveNumber aDrive, RFs& aFsSession)

    {

    // Before actual scanning, check the sizes of the few extra

    // data files that are not scanned in normal way.

    RResourceReader theReader;  

    TBool somethingToDo = EFalse;

    if(CMseng::IsInternalDrive(aFsSession, aDrive))

        {

        theReader.OpenLC( &iResFile, C_EXTRADATAFILES );

        somethingToDo = ETrue;

        }

    else if(CMseng::IsRemovableDrive(aFsSession, aDrive))

        {

        theReader.OpenLC( &iResFile, E_EXTRADATAFILES );

        somethingToDo = ETrue;

        }

    if(somethingToDo)

        {

        //the first WORD contains the number of elements in the resource

        const TInt length = theReader.ReadInt16L();

        // Read the array resource, 

        TInt groupindex; // value from enum TDataGroups

        for(TInt i=0; i<length; i++)

            {

            groupindex = theReader.ReadInt8L();

            HBufC* name = theReader.ReadHBufCL();

            TChar ch;

            if ( RFs::DriveToChar( aDrive, ch ) == KErrNone )

                {

                CleanupStack::PushL(name);

                TPtr ptrName = name->Des();

                TBuf<1> drive;

                drive.Append(ch);

                ptrName.Replace(0, drive.Length(), drive);

                // check the size of the file whose path was in the resource.

                TEntry file;

                TInt err = aFsSession.Entry(ptrName, file);

                if (err == KErrNone)

                    {

                    TInt size = file.iSize;

                    iScanArray->AddSizeByGroupL(groupindex, size);

                    }

                CleanupStack::PopAndDestroy(name);

                }

            }

        }

    CleanupStack::PopAndDestroy(&theReader);

    }

//  End of File