/*

* Copyright (c) 2006-2009 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:  Scans MMC after phone reboot for file changes*

*/

#include "mmcscannerao.h"

#include "harvesterlog.h"

#include "fsutil.h"

#include <placeholderdata.h>

#include <centralrepository.h>

_LIT( KColon, ":" );

const TInt KDefaultDelay = 3;

const TInt KMillion = 1000000;

const TUid KRepositoryUid = { 0x20007183 };

const TUint32 KScanDelayKey = 0x00000001;

CMmcScannerAO::CMmcScannerAO( TUint32 aMediaId, 

		CMdEHarvesterSession* aMdEClient, MMonitorPluginObserver* aObserver, 

		CHarvesterPluginFactory* aHarvesterPluginFactory, const TInt aPriority ) : 

		CTimer( aPriority ), iState( EUninitialized ), iMmcFileList( NULL )   

	{

	iMediaId = aMediaId;

	iMdEClient = aMdEClient;

	iObserver = aObserver;

	iHarvesterPluginFactory = aHarvesterPluginFactory;

	}

CMmcScannerAO* CMmcScannerAO::NewL( TUint32 aMediaId, CMdEHarvesterSession* aMdEClient,

		MMonitorPluginObserver* aObserver, CHarvesterPluginFactory* aHarvesterPluginFactory, 

		const TInt aPriority, TBool aAlreadyWaited )

	{

	CMmcScannerAO* self = new ( ELeave ) CMmcScannerAO( aMediaId, aMdEClient, aObserver, 

			aHarvesterPluginFactory, aPriority );

	CleanupStack::PushL( self );

	self->ConstructL( aAlreadyWaited );

	CleanupStack::Pop( self );

	return self;

	}

void CMmcScannerAO::ConstructL( TBool aAlreadyWaited )

	{

	CTimer::ConstructL();

	CActiveScheduler::Add( this ); // Add to scheduler

	iState = EUninitialized;

	User::LeaveIfError( iFs.Connect() );

	iMmcFileList = CMmcFileList::NewL();

	if( !aAlreadyWaited )

	    {

        TInt tmpDelay( KDefaultDelay );

        TTimeIntervalMicroSeconds32 delay( tmpDelay * KMillion ); 

        CRepository* repo = CRepository::NewLC( KRepositoryUid );

        const TInt err = repo->Get( KScanDelayKey, tmpDelay );

        if ( err == KErrNone )

            {

            delay = tmpDelay * KMillion;

            }

        CleanupStack::PopAndDestroy( repo );

        After( delay );

	    }

	else

	    {

	    TTimeIntervalMicroSeconds32 delay( 5 ); 

	    After( delay );

	    }

    iHEM = CHarvesterEventManager::GetInstanceL();

	}

CMmcScannerAO::~CMmcScannerAO()

	{

	Cancel(); // Cancel any request, if outstanding

	// Delete instance variables if any

	delete iMmcFileList;

	iEntryArray.ResetAndDestroy();

	iEntryArray.Close();

	iHarvestEntryArray.ResetAndDestroy();

	iHarvestEntryArray.Close();

    iHdArray.ResetAndDestroy();

	iHdArray.Close();

    if (iHEM)

        {

        iHEM->ReleaseInstance();

        }

	iFs.Close();

	}

void CMmcScannerAO::RunL()

	{

	switch( iState )

		{

		case( EUninitialized ):

			{

			WRITELOG("CMmcScannerAO::RunL - Setting files to not present");

			iMdEClient->SetFilesToNotPresent( iMediaId, ETrue );

			SetState( EReadFiles );

			break;

			}

		case( EReadFiles ):

			{

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

				{

				const TUint32 mediaId = FSUtil::MediaID(iFs, i);

				if( mediaId == iMediaId )

					{

					TChar chr;

					iFs.DriveToChar( i, chr );

					i = KMaxDrives;

					iDrive.Zero();

					iDrive.Append( chr );

					iDrive.Append( KColon );

					}

				}

			// drive not found (unmount before scanning delay)

			if ( iDrive.Length() == 0 )

				{

				SetState( EDone );

				break;

				}

			WRITELOG("CMmcScannerAO::RunL - build file list");

			iMmcFileList->BuildFileListL( iFs, iDrive, iEntryArray );

            // send start event

            const TInt entryCount = iEntryArray.Count();

            if( entryCount > 0 )

                {

                iHEM->IncreaseItemCount( EHEObserverTypeMMC, entryCount );

                iHEM->SendEventL( EHEObserverTypeMMC, EHEStateStarted, iHEM->ItemCount( EHEObserverTypeMMC ) );

                }

			SetState( EProcessFiles );

			break;

			}

		case( EProcessFiles ):

			{

			if( iEntryArray.Count() > 0 )

				{

				WRITELOG("CMmcScannerAO::RunL - handling file list");

				iMmcFileList->HandleFileEntryL( *iMdEClient, iEntryArray, 

						iHarvestEntryArray, iMediaId, iHarvesterPluginFactory );

				SetState( EProcessFiles );

                }

            else 

                {

                SetState( EHarvestFiles );

                }

			break;

			}

		case( EHarvestFiles ):

			{

			if ( iHarvestEntryArray.Count() > 0 )

				{

				WRITELOG("CMmcScannerAO::RunL - adding new files to harvester queue");

				HandleReharvestL();

				SetState( EHarvestFiles );

				}

			else

				{

                if ( iObserver )

                    {

                    if( iHdArray.Count() > 0)

                        {

                        iObserver->MonitorEvent( iHdArray );

                        }

                    }

                iHdArray.Reset();

                iHdArray.Compress();

				SetState( ERemoveNPFiles );

				}

			break;

			}

		case( ERemoveNPFiles ):

			{

			WRITELOG("CMmcScannerAO::RunL - Removing not present files");

			iMdEClient->RemoveFilesNotPresent( iMediaId, ETrue );

			SetState( EDone );

			break;

			}

		case( EDone ):

			{

			iFs.Close();

		    iHdArray.Reset();

		    iHdArray.Compress();

			iEntryArray.Compress();

			iHarvestEntryArray.Compress();

			break;

			}

		default: 

			break;

		}

	}

void CMmcScannerAO::HandleReharvestL()

	{

	WRITELOG("CMMCMountTaskAO::HandleReharvestL");

    const TInt count( iHarvestEntryArray.Count() );

    TInt batchSize( KMmcEntryBufferSize );

    if ( count < KMmcEntryBufferSize )

        {

        batchSize = count;

        }

    const TInt endIndex( count - batchSize );

    for ( TInt i = count; --i >= endIndex; )

        {

        CPlaceholderData* ei = iHarvestEntryArray[i];

        HBufC* fileName = ei->Uri().AllocLC();

        CHarvesterData* hd = CHarvesterData::NewL( fileName );

		hd->SetOrigin( MdeConstants::Object::EOther );

		CleanupStack::Pop( fileName );

		if ( ei->PresentState() == EMdsPlaceholder || 

			 ei->PresentState() == EMdsModified )

			{

			hd->SetEventType( EHarvesterEdit );

			hd->SetObjectType( ENormal );

			delete ei;

			}

		else

			{

			hd->SetEventType( EHarvesterAdd );

			hd->SetObjectType( EPlaceholder );

			hd->SetClientData( ei );

			}

		iHdArray.Append( hd );

        iHarvestEntryArray.Remove( i );

        }

    if( iHarvestEntryArray.Count() == 0 )

    	{

    	iHarvestEntryArray.Compress();

    	}

	}

TInt CMmcScannerAO::RunError( TInt /*aError*/ )

	{

	return KErrNone;

	}

void CMmcScannerAO::SetState( TCMmcScannerAOState aState )

	{

	WRITELOG("CMmcScannerAO::SetNextRequest" );

	if ( !IsActive() )

		{

		iState = aState;

		TRequestStatus* ptrStatus = &iStatus;

		User::RequestComplete( ptrStatus, KErrNone );

		SetActive();

		}

	}