/*

* Copyright (c) 2010 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:

*

*/

// INCLUDE FILES

#include "FBFileOps.h"

#include "FBFileUtils.h"

#include "engine.h"

#include "FBTraces.h"

#ifndef FILEBROWSER_LITE

  #include "FBFileOpClient.h"

#endif  

#include <f32file.h>

#include <bautils.h>

#include <eikenv.h>

#include <babackup.h>

const TInt KSecureBackupStartDelay = 750000;

const TInt KSecureBackupLoopDelay = 100000;

const TInt KSecureBackupEndDelay = 200000;

const TInt KMaxFileLockAttempts = 3;

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

CFileBrowserFileOps* CFileBrowserFileOps::NewL(CEngine* aEngine)

	{

	CFileBrowserFileOps* self = new(ELeave) CFileBrowserFileOps(aEngine);

	CleanupStack::PushL(self);

	self->ConstructL();

	CleanupStack::Pop();

	return self;

	}

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

CFileBrowserFileOps::CFileBrowserFileOps(CEngine* aEngine) : iEngine(aEngine)

	{

	}

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

void CFileBrowserFileOps::ConstructL()

	{

	iRecursiveState = EFileOpInvalid;

	iSecureBackUpActive = EFalse;

	iFileCommandActivatedSecureBackup = EFalse;

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

    iFileMan = CFileMan::NewL( iFs, this );

	}

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

CFileBrowserFileOps::~CFileBrowserFileOps()

	{

	if (iSBEClient)

	    delete iSBEClient;

    #ifndef FILEBROWSER_LITE	

        if (iFileOpClient)

            delete iFileOpClient;

    #endif	

    delete iFileMan;

    iFs.Close();    

    }

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

TInt CFileBrowserFileOps::ActivateSecureBackUpViaFileOp()

    {

    iFileManObserverResult = MFileManObserver::EContinue;

    // if already activate by a file command, return ok

    if (iFileCommandActivatedSecureBackup)

        return KErrNone;

    else

        {

        // if secure backup is already active, disable it first, because it may in wrong state

        if (iSecureBackUpActive)

            DeActivateSecureBackUp();

        }

    // try to activate full secure backup

    TInt err = ActivateSecureBackUp(conn::EBURBackupFull, conn::EBackupBase);

    if (err == KErrNone)

        iFileCommandActivatedSecureBackup = ETrue;

    return err;

    }

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

TInt CFileBrowserFileOps::DeActivateSecureBackUpViaFileOp()

    {

    TInt err(KErrGeneral);

    iFileManObserverResult = MFileManObserver::EContinue;

    // if activate by a file command, try to reactivate it

    if (iFileCommandActivatedSecureBackup)

        {

        err = DeActivateSecureBackUp();

        // even if it fails, forget the state

        iFileCommandActivatedSecureBackup = EFalse;

        }

    return err;

    }    

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

TInt CFileBrowserFileOps::ActivateSecureBackUp(conn::TBURPartType aPartType, conn::TBackupIncType aBackupIncType)

    {

    iFileManObserverResult = MFileManObserver::EContinue;

    // check for invalid parameters

    if (aPartType == conn::EBURNormal || aBackupIncType == conn::ENoBackup)

        User::Panic(_L("Inv.Usage.SE"), 532);

    TInt err(KErrNone);

    if (!iSBEClient)

        {

        TRAP(err, iSBEClient = conn::CSBEClient::NewL());

        if (err != KErrNone)

            return err;

        }

    TDriveList driveList;

    err = iFs.DriveList(driveList);

    if (err == KErrNone)

        {

        // make sure that the application has a system status to prevent getting shut down events

        iEngine->EikonEnv()->SetSystem(ETrue);

        // activating secure back up removes locks from files which respect this fuctionality                

        TRAP(err, iSBEClient->SetBURModeL(driveList, aPartType, aBackupIncType));

        if (err == KErrNone)

            {

            iSecureBackUpActive = ETrue;

            User::After(KSecureBackupStartDelay); // a short delay to wait to activate

            }

        }

    return err;

    }

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

TInt CFileBrowserFileOps::DeActivateSecureBackUp()

    {

    TInt err(KErrNone);

    if (!iSBEClient)

        {

        TRAP(err, iSBEClient = conn::CSBEClient::NewL());

        if (err != KErrNone)

            return err;

        // make sure that the application has a system status

        iEngine->EikonEnv()->SetSystem(ETrue);

        }

    TDriveList driveList;

    err = iFs.DriveList(driveList);

    if (err == KErrNone)

        {

        // deactivate secure backup

        TRAP(err, iSBEClient->SetBURModeL(driveList, conn::EBURNormal, conn::ENoBackup));

        User::After(KSecureBackupEndDelay); // a short delay to wait to deactivate

        // system status not needed anymore

        iEngine->EikonEnv()->SetSystem(EFalse);

        }

    iSecureBackUpActive = EFalse;

    return err;

    }

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

TInt CFileBrowserFileOps::DoFindEntries(const TDesC& aFileName, const TDesC& aPath)

    {

    TFindFile fileFinder(iFs);

    CDir* dir;

    TInt err = fileFinder.FindWildByPath(aFileName, &aPath, dir);

    while (err == KErrNone && iFileManObserverResult != MFileManObserver::ECancel)

        {

        for (TInt i=0; i<dir->Count(); i++)

            {

            TEntry entry = (*dir)[i];

            if (entry.iName.Length() && aPath.Length())

                {

                // parse the entry

                TParse parsedName;

                parsedName.Set(entry.iName, &fileFinder.File(), NULL);

                if (parsedName.Drive().Length() && aPath.Length() && parsedName.Drive()[0] == aPath[0])

                    {

                    // get full source path

                    TFileName fullSourcePath = parsedName.FullName();

                    if (entry.IsDir())

                        fullSourcePath.Append(_L("\\"));

                    // call the file operation command

                    switch(iRecursiveState)

                        {

                        case EFileOpAttribs:

                            {

                            // the same attribs command can be given for both directories and files

                            FileOpAttribs(fullSourcePath, iUint1, iUint2, iTime1, iUint3);

                            }

                            break;

                        case EFileOpCopy:

                            {

                            // calculate length of new entries added to the original source path

                            TUint newEntriesLength = fullSourcePath.Length() - iBuf1.Length();

                            // get pointer description to the rightmost data

                            TPtr16 newEntriesPtr = fullSourcePath.RightTPtr(newEntriesLength);

                            // generate target path

                            TFileName fullTargetPath = iBuf2;

                            fullTargetPath.Append(newEntriesPtr);

                            if (entry.IsDir())

                                {

                                // if it is a directory entry, just create it based on the entry's attributes

                                FileOpMkDirAll(fullTargetPath, entry.iAtt);

                                }

                            else

                                {

                                // ensure that root target folder exists

                                BaflUtils::EnsurePathExistsL(iFs, iBuf2);

                                // otherwise copy the file

                                FileOpCopy(fullSourcePath, fullTargetPath, iUint1);

                                }

                            }

                            break;

                        case EFileOpDelete:

                            {

                            if (entry.IsDir())

                                {

                                // for directories call rmdir    

                                FileOpRmDir(fullSourcePath, iUint1);

                                }

                            else

                                {

                                // for files call the normal file deletion operation    

                                FileOpDeleteFile(fullSourcePath, iUint1);

                                }

                            }

                            break;

                        default:

                            User::Panic (_L("FileOpRecurs"), 775);

                            break;

                        }                        

                    }

                }

                if ( iFileManObserverResult == MFileManObserver::ECancel ) break;

            }

        delete dir;

        dir = NULL;

        if ( iFileManObserverResult != MFileManObserver::ECancel )

            {

            err = fileFinder.FindWild(dir);

            }

        }

    return err;

    }

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

TInt CFileBrowserFileOps::DoFindEntriesRecursiveL(const TDesC& aFileName, const TDesC& aPath)

	{

    TInt err(KErrNone);

    // it is logical to scan upwards when deleting and changing attributes

    CDirScan::TScanDirection scanDirection = CDirScan::EScanUpTree;

    // when copying files, it is more logical to move downwards

    if (iRecursiveState == EFileOpCopy)

        scanDirection = CDirScan::EScanDownTree;

    CDirScan* scan = CDirScan::NewLC(iFs);

    scan->SetScanDataL(aPath, KEntryAttDir|KEntryAttMatchMask, ESortByName | EAscending | EDirsFirst, scanDirection);

    CDir* dir = NULL;

    for(;;)

        {

        TRAP(err, scan->NextL(dir));

        if (!dir  || (err != KErrNone))

            break;

        for (TInt i=0; i<dir->Count(); i++)

            {

            TEntry entry = (*dir)[i];

            if (entry.IsDir())

                {

                TFileName path(scan->FullPath());

                if (path.Length())

                    {

                    path.Append(entry.iName);

                    path.Append(_L("\\"));

                    // test path.Left(iBuf2.Length()).Compare(iBuf2) - to prevent never ending recursive copy (in case of copy folder under itself)

                    if( !(iRecursiveState == EFileOpCopy && !path.Left(iBuf2.Length()).Compare(iBuf2)) )

                        {

                        DoFindEntries(aFileName, path);

                        }

                    }

                }

            if ( iFileManObserverResult == MFileManObserver::ECancel )

                {

                break;

                }

            }

        delete(dir);

        if ( iFileManObserverResult == MFileManObserver::ECancel )

            {

            break;

            }

        }

    CleanupStack::PopAndDestroy(scan);

    return err;

    }

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

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

TInt CFileBrowserFileOps::Copy(const TFileEntry& aSourceEntry, const TDesC& aTargetFullName, TUint aSwitch, TBool aDeleteSource) 

    {

    iOperationError = KErrNone;

    iFileManObserverResult = MFileManObserver::EContinue;

    TFileName sourcePath = aSourceEntry.iPath;

    sourcePath.Append(aSourceEntry.iEntry.iName);

    TInt err(KErrNone);

    if (aSourceEntry.iEntry.IsDir() && (aSwitch & CFileMan::ERecurse))

        {

        // find all files recursively and run the operation for them

        iRecursiveState = EFileOpCopy;

        sourcePath.Append(_L("\\"));

        TFileName targetPath = aTargetFullName;

        targetPath.Append(_L("\\"));

        // remove the recursion flag because we will implement our own recursion

        TUint newSwitch(aSwitch);

        newSwitch &= ~CFileMan::ERecurse;

        iBuf1.Copy(sourcePath);

        iBuf2.Copy(targetPath);

        iUint1 = newSwitch;

        TRAP(err, DoFindEntries(_L("*"), sourcePath));              // entries under current directory entry

        if ( iFileManObserverResult != MFileManObserver::ECancel )

            {

            TRAP(err, DoFindEntriesRecursiveL(_L("*"), sourcePath));    // recursively under directories of current directory entry

            }

        // ensure that target folder exists in case of copying empty folder

        BaflUtils::EnsurePathExistsL(iFs, targetPath);

        // a path has a trailing backslash so it needs to be removed before the call

        err = FileOpAttribs(targetPath.Left(targetPath.Length()-1), aSourceEntry.iEntry.iAtt, 0, 0, 0);

        }

    else if (aSourceEntry.iEntry.IsDir())

        {

        TFileName targetPath = aTargetFullName;

        targetPath.Append(_L("\\"));

        // just create a directory based on the file attributes of the source directory

        err = FileOpMkDirAll(targetPath, aSourceEntry.iEntry.iAtt);

        }

    else

        {

        // remove a recursion flag if present (this should never happen, but some extra error checking)

        if (aSwitch & CFileMan::ERecurse)

            aSwitch &= ~CFileMan::ERecurse;    

        // do the operation for a file entry

        err = FileOpCopy(sourcePath, aTargetFullName, aSwitch);

        }

    // delete source if needed and copy succeeded without any errors (== move operation)

    if ( aDeleteSource && iOperationError == KErrNone &&

         iFileManObserverResult != MFileManObserver::ECancel )

        {

        err = Delete(aSourceEntry, aSwitch);    

        }

    if ( !iOperationError && iFileManObserverResult == MFileManObserver::ECancel )

        {

        iOperationError = KErrCancel;

        }

    return iOperationError; 

    }

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

TInt CFileBrowserFileOps::FileOpCopy(const TDesC& aSourceFullName, const TDesC& aTargetFullName, TUint aSwitch) 

    {

    TInt err = DoFileOpCopy(aSourceFullName, aTargetFullName, aSwitch);

    // if locked, unlock the file and retry

    if (iEngine->Settings().iRemoveFileLocks && err == KErrInUse)

        {

        // try to remove the file lock by activating secure backup mode

        if (ActivateSecureBackUpViaFileOp() == KErrNone)

            {

            // try the operation several times

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

                {

                err = DoFileOpCopy(aSourceFullName, aTargetFullName, aSwitch);

                if (err != KErrInUse)

                    break;

                else

                    User::After(KSecureBackupLoopDelay);

                }

            }

        }

    // if access denied, then try to remove the target path and try again

    if (iEngine->Settings().iIgnoreProtectionsAtts && err == KErrAccessDenied && BaflUtils::FileExists(iFs, aTargetFullName))

        {

        if (FileOpDeleteFile(aTargetFullName, 0) == KErrNone)

            {

            err = DoFileOpCopy(aSourceFullName, aTargetFullName, aSwitch);

            }

        }

    // if the file already exists, it is not an error    

    if (err == KErrAlreadyExists)

        err = KErrNone;

    // if copying from a ROM drive, remove the writing protection flag

    if (iEngine->Settings().iRemoveROMWriteProrection && err == KErrNone && aSourceFullName.Length() > 3 && (aSourceFullName[0]=='z' || aSourceFullName[0]=='Z'))

        {

        FileOpAttribs(aTargetFullName, 0, KEntryAttReadOnly, 0, 0);

        }

    // remember the "lowest" error

    if (err < iOperationError)

        iOperationError = err;

    LOGSTRING4("FileBrowser: FileOpCopy %S -> %S, err=%d", &aSourceFullName, &aTargetFullName, err);

    return err; 

    }

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

TInt CFileBrowserFileOps::DoFileOpCopy(const TDesC& aSourceFullName, const TDesC& aTargetFullName, TUint aSwitch) 

    {

    #ifndef FILEBROWSER_LITE

    if (iEngine->Settings().iBypassPlatformSecurity)

        {

        if (!iFileOpClient)

            iFileOpClient = CFBFileOpClient::NewL();   

        return iFileOpClient->Copy(aSourceFullName, aTargetFullName, aSwitch);

        }

    else

        {

    #endif

        //CAsyncWaiter* waiter = CAsyncWaiter::NewLC();

        //TInt result = iFileMan->Copy( aSourceFullName, aTargetFullName, aSwitch, waiter->iStatus );

        //waiter->StartAndWait();

        //if ( !result ) result = waiter->Result();

        //CleanupStack::PopAndDestroy( waiter );

        TInt result = iFileMan->Copy( aSourceFullName, aTargetFullName, aSwitch );

        return result;

    #ifndef FILEBROWSER_LITE

        }    

    #endif

    }

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

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

TInt CFileBrowserFileOps::Rename(const TFileEntry& aSourceEntry, const TDesC& aNew, TUint aSwitch)

    {

    iOperationError = KErrNone;

    iFileManObserverResult = MFileManObserver::EContinue;

    TFileName sourcePath = aSourceEntry.iPath;

    sourcePath.Append(aSourceEntry.iEntry.iName);