// All rights reserved.

// This component and the accompanying materials are made available

// under the terms of the License "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:

// USB Mass Storage Application

//

/**

 @file

*/

#include "general.h"

#include "config.h"

#include "activecontrol.h"

#include <usbmsshared.h>

#include <massstorage.h>

#include "usbms.h"

extern CActiveControl* gActiveControl;

extern RTest test;

extern TBool gVerbose;

extern TBool gSkip;

extern TBool gTempTest;

LOCAL_D RFs fs;

LOCAL_D TBuf<0x40> mountList;

LOCAL_D TFixedArray<TBool, KMaxDrives>                   msfsMountedList;  ///< 'true' entry corresponds to the drive with mounted MSFS.FSY

LOCAL_D TFixedArray<CFileSystemDescriptor*, KMaxDrives>  unmountedFsList;  ///< every non-NULL entry corresponds to the unmounted original FS for the drive

LOCAL_D RUsbMassStorage UsbMs;

LOCAL_D CUsbWatch * usbWatch;

static const TUint KNumPropWatch = 4;

LOCAL_D CPropertyWatch * propWatch[KNumPropWatch];

_LIT(KMsFsy, "MSFS.FSY");

_LIT(KMsFs, "MassStorageFileSystem");

_LIT(KOk,"OK");

_LIT(KError,"Error");

_LIT(KBytesTransferredFmt, "%c:%d/%d \n");

_LIT(KErrFmt, "Error: %d\r");

_LIT(KConfigured,"Configured");

_LIT(KNotConfigured,"NOT Configured");

_LIT8(KDefPwd,"123");

TMediaPassword  password(KDefPwd);

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

CFileSystemDescriptor::~CFileSystemDescriptor()

    {

    iFsName.Close();

    iPrimaryExtName.Close();

    }

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

CFileSystemDescriptor* CFileSystemDescriptor::NewL(const TDesC& aFsName, const TDesC& aPrimaryExtName, TBool aDrvSynch)

    {

    CFileSystemDescriptor* pSelf = new (ELeave) CFileSystemDescriptor;

    CleanupStack::PushL(pSelf);

    pSelf->iFsName.CreateMaxL(aFsName.Length());

    pSelf->iFsName.Copy(aFsName);

    pSelf->iPrimaryExtName.CreateMaxL(aPrimaryExtName.Length());

    pSelf->iPrimaryExtName.Copy(aPrimaryExtName);

    pSelf->iDriveSynch = aDrvSynch;

    CleanupStack::Pop();

    return pSelf;

    }

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

/**

    this information in the FS descriptor

    @return on success returns a pointer to the instantinated FS descriptor

*/

LOCAL_C CFileSystemDescriptor* DoDismountOrginalFS(RFs& aFs, TInt aDrive)

    {

    TInt        nRes;

    TBuf<128>   fsName;

    TBuf<128>   primaryExtName;

    TBool       bDrvSync = EFalse;

    test.Printf(_L("DoDismountOrginalFS drv:%d\n"), aDrive);

    //-- 1. get file system name

    nRes = aFs.FileSystemName(fsName, aDrive);

    if(nRes != KErrNone)

        {//-- probably no file system installed at all

        return NULL;

        }

    //-- 2. find out if the drive sync/async

    TPckgBuf<TBool> drvSyncBuf;

    nRes = aFs.QueryVolumeInfoExt(aDrive, EIsDriveSync, drvSyncBuf);

    if(nRes == KErrNone)

        {

        bDrvSync = drvSyncBuf();

        }

    //-- 3. find out primary extension name if it is present; we will need to add it againt when mounting the FS

    //-- other extensions (non-primary) are not supported yet

    nRes = aFs.ExtensionName(primaryExtName, aDrive, 0);

    if(nRes != KErrNone)

        primaryExtName.SetLength(0);

        }

    //-- 3.1 check if the drive has non-primary extensions, fail in this case, because this FS can't be mounted back normally

    nRes = aFs.ExtensionName(primaryExtName, aDrive, 1);

    if(nRes == KErrNone)

        test.Printf(_L("DoDismountOrginalFS Non-primary extensions are not supported!\n"));

        return NULL;

        }

    test.Printf(_L("DoDismountOrginalFS FS:%S, Prim ext:%S, synch:%d\n"), &fsName, &primaryExtName, bDrvSync);

    //-- create FS descriptor and dismount the FS

    TRAP(nRes, pFsDesc = CFileSystemDescriptor::NewL(fsName, primaryExtName, bDrvSync));

    if(nRes != KErrNone)

        return NULL; //-- OOM ?

    nRes = aFs.DismountFileSystem(fsName, aDrive);

    if(nRes != KErrNone)

        {

        delete pFsDesc;

        pFsDesc = NULL;

        test.Printf(_L("DoDismountOrginalFS Dismounting Err:%d\n"), nRes);

        }

    return pFsDesc;

}

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

/**

    Tries to restore the original FS on the drive using the FS descriptor provided

    @return standard error code.

*/

LOCAL_C TInt DoRestoreFS(RFs& aFs, TInt aDrive, CFileSystemDescriptor* apFsDesc)

    {

    TInt nRes;

    test.Printf(_L("DoRestoreFS drv:%d\n"), aDrive);

    //-- 1. check that there is no FS installed

    TBuf<128>   fsName;

    nRes = aFs.FileSystemName(fsName, aDrive);

    if(nRes == KErrNone)

        {//-- there is a file system already installed

		test.Printf(_L("DoRestoreFS This drive already has FS intalled:%S \n"), &fsName);

        return KErrAlreadyExists;

        }

    TPtrC ptrN  (apFsDesc->FsName());

    TPtrC ptrExt(apFsDesc->PrimaryExtName());

    test.Printf(_L("DoRestoreFS Mounting FS:%S, Prim ext:%S, synch:%d\n"), &ptrN, &ptrExt, apFsDesc->DriveIsSynch());

    if(ptrExt.Length() >0)

        {//-- there is a primary extension to be mounted

        nRes = aFs.AddExtension(ptrExt);

        if(nRes != KErrNone && nRes != KErrAlreadyExists)

            {

            return nRes;

            }

        nRes = aFs.MountFileSystem(ptrN, ptrExt, aDrive, apFsDesc->DriveIsSynch());

        }

    else

        {

        nRes = aFs.MountFileSystem(ptrN, aDrive, apFsDesc->DriveIsSynch());

        }

    if(nRes != KErrNone)

        {

        }

    return nRes;

    }

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

/**

    Dismount the original FS from the drive and mount MsFS instead

*/

LOCAL_C void MountMsFs(TInt driveNumber)

	{

    //-- 1. try dismounting the original FS

    CFileSystemDescriptor* fsDesc = DoDismountOrginalFS(fs, driveNumber);

    unmountedFsList[driveNumber] = fsDesc;

    if(fsDesc)

        {

        TPtrC ptrN(fsDesc->FsName());

        test.Printf(_L("drv:%d FS:%S Dismounted OK\n"),driveNumber, &ptrN);

        }

    else

        {

        test.Printf(_L("drv:%d Dismount FS Failed!\n"),driveNumber);

        }

    //-- 2. try to mount the "MSFS"

    TInt error;

    error = fs.MountFileSystem(KMsFs, driveNumber);

	test.Printf(_L("MSFS Mount:   %S (%d)\n"), (error?&KError:&KOk), error);

	if (!error)

		msfsMountedList[driveNumber] = ETrue;

	}

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

/**

*/

LOCAL_C TInt RestoreMount(TInt driveNumber)

	{

	TInt err = KErrNone;

    //-- 1. try dismounting the "MSFS"

	if (msfsMountedList[driveNumber])

		{

		err = fs.DismountFileSystem(KMsFs, driveNumber);

		test.Printf(_L("MSFS Dismount:%S (%d)\n"), (err?&KError:&KOk), err);

		if (err)

			return err;

		msfsMountedList[driveNumber] = EFalse;

        }

    //-- 2. try to mount the original FS back

    CFileSystemDescriptor* fsDesc = unmountedFsList[driveNumber];

    if(fsDesc)

        {

        err = DoRestoreFS(fs, driveNumber, fsDesc);

        TPtrC ptrN(fsDesc->FsName());

        test.Printf(_L("%S Mount:    %S (%d)\n"), &ptrN, (err?&KError:&KOk), err);

        delete fsDesc;

        unmountedFsList[driveNumber] = NULL;

        }

	return err;

	}

//////////////////////////////////////////////////////////////////////////////

//

// CPropertyWatch

// An active object that tracks changes to the KUsbMsDriveState properties

//

//////////////////////////////////////////////////////////////////////////////

CPropertyWatch* CPropertyWatch::NewLC(TUsbMsDriveState_Subkey aSubkey, PropertyHandlers::THandler aHandler)

	{

	CPropertyWatch* me=new(ELeave) CPropertyWatch(aHandler);

	CleanupStack::PushL (me);

	me->ConstructL(aSubkey);

	CleanupStack::Pop();

	return me;

	}

CPropertyWatch::CPropertyWatch(PropertyHandlers::THandler aHandler)

	: CActive(0), iHandler(aHandler)

	{}

void CPropertyWatch::ConstructL(TUsbMsDriveState_Subkey aSubkey)

	{

	User::LeaveIfError(iProperty.Attach(KUsbMsDriveState_Category, aSubkey));

	CActiveScheduler::Add(this);

	// initial subscription and process current property value

	RunL();

	}

CPropertyWatch::~CPropertyWatch()

	{

	Cancel();

	iProperty.Close();

	}

void CPropertyWatch::DoCancel()

	{

	iProperty.Cancel();

	}

void CPropertyWatch::RunL()

	{

	// resubscribe before processing new value to prevent missing updates

	iProperty.Subscribe(iStatus);

	SetActive();

	iHandler(iProperty);

	}

//////////////////////////////////////////////////////////////////////////////

//

// CUsbWatch

//

//////////////////////////////////////////////////////////////////////////////

CUsbWatch* CUsbWatch::NewLC(RUsb& aUsb)

	{

	CUsbWatch* me=new(ELeave) CUsbWatch(aUsb);

	CleanupStack::PushL (me);

	me->ConstructL();

	CleanupStack::Pop();

	return me;

	}

CUsbWatch::CUsbWatch(RUsb& aUsb)

	iUsb(aUsb),

	iUsbDeviceState(EUsbcDeviceStateUndefined),

	iWasConfigured(EFalse)

	{}

void CUsbWatch::ConstructL()

	{

	CActiveScheduler::Add(this);

	RunL();

	}

CUsbWatch::~CUsbWatch()

	{

	Cancel();

	iUsb.AlternateDeviceStatusNotifyCancel();

	}

void CUsbWatch::DoCancel()

	{

	iUsb.AlternateDeviceStatusNotifyCancel();

	}

static TBool IsDriveConnected(TInt driveStatusIndex)

	{

	TInt driveStatus = PropertyHandlers::allDrivesStatus[2*driveStatusIndex+1];

	return driveStatus >= EUsbMsDriveState_Connected ? ETrue : EFalse;

	}

static TChar DriveNumberToLetter(TInt driveNumber)

	{

	TChar driveLetter = '?';

	fs.DriveToChar(driveNumber, driveLetter);

	return driveLetter;

	}

static TBool IsDriveInMountList(TUint driveLetter)

	{

	TUint16 driveLetter16 = static_cast<TUint16>(driveLetter);

	return(!mountList.Length() || KErrNotFound != mountList.Find(&driveLetter16, 1));

	}

void CUsbWatch::RunL()

	{

	gActiveControl->SetMSFinished(EFalse);

	if (gVerbose)

		{

		switch (iUsbDeviceState)

			{

			case EUsbcDeviceStateUndefined : 					// 0

				test.Printf(_L(">> CUSBWatch:Undefined %S\n"), iWasConfigured ? &KConfigured : &KNotConfigured);

				break;

			case EUsbcDeviceStateAttached :						// 1

				test.Printf(_L(">> CUSBWatch:Attached %S\n"), iWasConfigured ? &KConfigured : &KNotConfigured);

				break;

			case EUsbcDeviceStatePowered :						// 2

				test.Printf(_L(">> CUSBWatch:Powered %S\n"), iWasConfigured ? &KConfigured : &KNotConfigured);

				break;

			case EUsbcDeviceStateDefault :						// 3

				test.Printf(_L(">> CUSBWatch:Default %S\n"), iWasConfigured ? &KConfigured : &KNotConfigured);

				break;

			case EUsbcDeviceStateAddress :						// 4

				test.Printf(_L(">> CUSBWatch:Address %S\n"), iWasConfigured ? &KConfigured : &KNotConfigured);

				break;

			case EUsbcDeviceStateConfigured :					// 5

				test.Printf(_L(">> CUSBWatch:Configured %S\n"), iWasConfigured ? &KConfigured : &KNotConfigured);

				break;

			case EUsbcDeviceStateSuspended : 					// 6

				test.Printf(_L(">> CUSBWatch:Suspended %S\n"), iWasConfigured ? &KConfigured : &KNotConfigured);

				break;

			default :

				test.Printf(_L(">> CUSBWatch:UNKNOWN %S\n"), iWasConfigured ? &KConfigured : &KNotConfigured);

				break;

			}

		}

	iUsb.AlternateDeviceStatusNotify(iStatus, iUsbDeviceState);

	SetActive();

	// If the cable is disconnected, unmount all the connected drives.

	if(iWasConfigured && iUsbDeviceState == EUsbcDeviceStateUndefined)

		{

		for(TInt i=0; i<PropertyHandlers::allDrivesStatus.Length()/2; i++)

			{

			if(IsDriveConnected(i))

				{

				RestoreMount(PropertyHandlers::allDrivesStatus[2*i]);

				}

			}

		iWasConfigured = EFalse;

		}

	// If cable is connected, mount all drives in the auto-mount list.

	// This is done for performance, since if this is not done here,

	// Connecting state.

	if(iUsbDeviceState == EUsbcDeviceStateConfigured)

		{

		for(TInt i=0; i<PropertyHandlers::allDrivesStatus.Length()/2; i++)

			{

			TInt driveNumber = PropertyHandlers::allDrivesStatus[2*i];

			if(!IsDriveConnected(i) && IsDriveInMountList(DriveNumberToLetter(driveNumber)))

				{

				MountMsFs(driveNumber);

				}

			}

		iWasConfigured = ETrue;

		}

	}

//////////////////////////////////////////////////////////////////////////////

//

// PropertyHandlers

//

//////////////////////////////////////////////////////////////////////////////

TBuf8<16> PropertyHandlers::allDrivesStatus;

TUsbMsBytesTransferred PropertyHandlers::iKBytesRead;

TUsbMsBytesTransferred PropertyHandlers::iKBytesWritten;

TInt PropertyHandlers::iMediaError;

void PropertyHandlers::Read(RProperty& aProperty)

	{

	Transferred(aProperty, iKBytesRead);

	}

void PropertyHandlers::Written(RProperty& aProperty)

	{

	Transferred(aProperty, iKBytesWritten);

	}

void PropertyHandlers::Transferred(RProperty& aProperty, TUsbMsBytesTransferred& aReadOrWritten)

	{

	TInt err = aProperty.Get(aReadOrWritten);

	if(err == KErrNone)

		{

		for(TInt i = 0; i < allDrivesStatus.Length()/2; i++)

			{

			if (gVerbose)

				{

						(char)DriveNumberToLetter(allDrivesStatus[2*i]), iKBytesRead[i], iKBytesWritten[i]);