/*

* Copyright (c) 2002-2004 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:  Mount manager

 *

*/

// INCLUDE FILES

#include <badesca.h> 

#include <f32fsys.h> // KMaxVolumeNameLength

#include <rsfwmountman.h>

#include <rsfwmountentry.h>

#include "rsfwinterface.h"

#include "rsfwmountmanimpl.h"

// CONSTANTS

const TUint8 KDefaultDriveLetter = 'J';

 // system default if no other specified; 

 // remote drives should use letters from J: to Y:

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

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

// CRsfwMountManImpl::CRsfwMountManImpl

// Constructor

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

//

CRsfwMountManImpl::CRsfwMountManImpl()

    {

    }

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

// CRsfwMountManImpl::NewL

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

//

CRsfwMountManImpl* CRsfwMountManImpl::NewL(TUint aDefaultFlags,

                                   MRsfwMountManObserver* aMountManObserver)

    {

    CRsfwMountManImpl* self = new (ELeave) CRsfwMountManImpl();

    CleanupStack::PushL(self);

    self->ConstructL(aDefaultFlags, aMountManObserver);

    CleanupStack::Pop(self);

    return self;

    }

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

// CRsfwMountManImpl::~CRsfwMountManImpl

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

//

CRsfwMountManImpl::~CRsfwMountManImpl()

    {

    iFs.Close();

    if (iRsfwControlConnected)

        {

        iRsfwControl.Close();

        }

    delete iMountStore;

    iBlackList.Close();

    }

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

// CRsfwMountManImpl::GetMountNamesL

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

//

void CRsfwMountManImpl::GetMountNamesL(CDesC16Array* aNames)

    {

    iMountStore->GetNamesL(aNames);

    }

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

// CRsfwMountManImpl::MountEntry

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

//

const CRsfwMountEntry* CRsfwMountManImpl::MountEntryL(const TDesC& aName)

    {

    return iMountStore->LookupEntryByNameL(aName);

    }

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

// CRsfwMountManImpl::MountEntry

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

//

const CRsfwMountEntry* CRsfwMountManImpl::MountEntryL(TChar aDriveLetter)

    {

    return iMountStore->LookupEntryByDriveL(aDriveLetter);

    }

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

// CRsfwMountManImpl::AddMountEntryL

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

//

void CRsfwMountManImpl::AddMountEntryL(CRsfwMountEntry* aMountEntry)

    {

    // Take ownership

    CleanupStack::PushL(aMountEntry);

    // Look for existing configuration with the same friendly name

    // overwriting not allowed

    const HBufC* driveName = aMountEntry->Item(EMountEntryItemName);

    const CRsfwMountEntry* entry = MountEntryL(*driveName);

    if (entry)

        {

        User::Leave(KErrInUse);

        }

    // Also look for existing configuration with the same drive letter

    // overwriting not allowed

    TChar driveLetter = DriveLetterFromMountEntry(*aMountEntry);

    if (driveLetter != '?')

        {

        entry = MountEntryL(driveLetter);

        if (entry)

            {

            User::Leave(KErrInUse);

            }

        }

    else 

        {

        driveLetter = FreeDriveLetterL(driveLetter);

        TBuf<1> driveLetterBuf;

        driveLetterBuf.Append(driveLetter);

        // Replace '?' with the allocated drive letter

        aMountEntry->SetItemL(EMountEntryItemDrive, driveLetterBuf);

        }

    // find the number of remote drives in use

    // if 9 already new ones are not allowed

    TDriveList fsDriveList;   

    User::LeaveIfError(iFs.DriveList(fsDriveList, KDriveAttRemote));    

    TInt i;

    TInt remoteDrives = 0;

    for (i = EDriveA; i <= EDriveZ; i++)

        { 

        if (fsDriveList[i] & KDriveAttRemote)

            {

            remoteDrives++;

            }

        }

    if (remoteDrives == KMaxRemoteDrives)

        {

        User::Leave(KErrInUse);

        }

    // Save the friendly name (not guaranteed to survive CMountStore::AddEntryL

    HBufC* name = NULL;

    if (aMountEntry->Item(EMountEntryItemName))

        {

        name = aMountEntry->Item(EMountEntryItemName)->AllocL();

        }

    // Release ownership

    CleanupStack::Pop(aMountEntry);

    // Add mount configuration repository entry

    TRAPD(err, AddEntryL(aMountEntry));

    CleanupStack::PushL(name);

    User::LeaveIfError(err);

    // Add mount in File Server

    if (name)

        {

        User::LeaveIfError(MountFileSystem(*name, driveLetter));

        }

    else

        {

        _LIT(KRsfwNoName, "remotedrive");

        User::LeaveIfError(MountFileSystem(KRsfwNoName, driveLetter));

        }

    // finally set mountconnection state to disconnected

    // this will make in Remote File Engine what is called "disconnected dormant mount"    

    SetMountConnectionState(driveLetter, KMountNotConnected);

    CleanupStack::PopAndDestroy(name);

    }

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

// CRsfwMountManImpl::DeleteMountEntryL

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

//

void CRsfwMountManImpl::DeleteMountEntryL(const TDesC& aName)

    {

    const CRsfwMountEntry* mountEntry = iMountStore->LookupEntryByNameL(aName);

    if (mountEntry)

        {

        TChar driveLetter = DriveLetterFromMountEntry(*mountEntry);

        if (driveLetter != '?')

            {

            DeleteMountEntryL(driveLetter);

            }

        }

    }

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

// CRsfwMountManImpl::DeleteMountEntryL

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

//

void CRsfwMountManImpl::DeleteMountEntryL(TChar aDriveLetter)

    {

    const CRsfwMountEntry* mountEntry =

        iMountStore->LookupEntryByDriveL(aDriveLetter);

    if (mountEntry)

        {

        // Remove entry from configuration repository

        iMountStore->RemoveEntryL(aDriveLetter);

        // Dismount from file server and Remote File Engine

        ExecuteUnmount(aDriveLetter);

        }

    }

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

// CRsfwMountManImpl::EditMountEntryL

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

//

void CRsfwMountManImpl::EditMountEntryL(CRsfwMountEntry* aMountEntry)

    {

    // take ownership

    CleanupStack::PushL(aMountEntry);

    // look for the drive based on the letter

    TChar driveLetter = DriveLetterFromMountEntry(*aMountEntry);

    const CRsfwMountEntry* entryByDrive = MountEntryL(driveLetter);

    if ( !entryByDrive )

        {

        User::Leave(KErrNotFound);

        }

    // check whether the name has changed

    TBool nameChanged = EFalse;

    const HBufC* newName = aMountEntry->Item(EMountEntryItemName);

    const HBufC* oldName = entryByDrive->Item(EMountEntryItemName);

    if ( newName->Compare(*oldName) != KErrNone )

        {

        nameChanged = ETrue;

        }

    // check whether URI has changed

    TBool uriChanged = EFalse;

    const HBufC* newUri = aMountEntry->Item(EMountEntryItemUri);

    const HBufC* oldUri = entryByDrive->Item(EMountEntryItemUri);

    if ( newUri->Compare(*oldUri) != KErrNone )

        {

        uriChanged = ETrue;

        }

    // if the name has changed -> check whether it is not used by the other mount entry

    if ( nameChanged )

        {

        const CRsfwMountEntry* entryByName = MountEntryL(*newName);

        if ( entryByName && entryByDrive != entryByName )

            {

            User::Leave(KErrInUse);

            }        

        }

    // release ownership and call MountStore API

    CleanupStack::Pop(aMountEntry);    

    AddEntryL(aMountEntry);

    // if URI has changed we have to unmount the drive from RFE in order 

    // to clear the cache and mount it again

    // note there is no need to make unmounting from File System

    if ( uriChanged )

        {

        TInt err;

        User::LeaveIfError(GetRsfwControlConnection());

        err = iRsfwControl.DismountByDriveLetter(driveLetter);

        if ((err != KErrNone) && (err != KErrNotFound)) 

            {

            User::Leave(err);

            }

        User::LeaveIfError(iRsfwControl.SetMountConnectionState(driveLetter, KMountNotConnected));

        }

    // if the name has changed -> change label in File System

    if ( nameChanged )

        {

        User::LeaveIfError(SetDriveNameToFileSystem(driveLetter, *newName));

        }

    }    

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

// CRsfwMountManImpl::MountL

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

//

void CRsfwMountManImpl::MountL(TChar& aDriveLetter)

    {

    TInt driveNumber;

    User::LeaveIfError(iFs.CharToDrive(aDriveLetter, driveNumber));

    User::LeaveIfError(GetRsfwControlConnection());

    User::LeaveIfError(iRsfwControl.Mount(driveNumber));

    }

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

// CRsfwMountManImpl::MountL

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

//

void CRsfwMountManImpl::MountBlindL(TChar& aDriveLetter)

    {

    TInt driveNumber;

    User::LeaveIfError(iFs.CharToDrive(aDriveLetter, driveNumber));

    User::LeaveIfError(GetRsfwControlConnection());

    User::LeaveIfError(iRsfwControl.MountBlind(driveNumber));

    }

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

// CRsfwMountManImpl::SetMountConnectionState

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

//

TInt CRsfwMountManImpl::SetMountConnectionState(TChar aDriveLetter,

                                            TUint aConnectionState)

    {

    TInt err = GetRsfwControlConnection();

    if (err != KErrNone)

        {

        return err;

        }

    err = iRsfwControl.SetMountConnectionState(aDriveLetter, aConnectionState);

    return err;

    }

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

// CRsfwMountManImpl::IsAppOnBlackList

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

//

TBool CRsfwMountManImpl::IsAppOnBlackList(TUid aUid)

    {

    TInt i;

    for ( i = 0; i < iBlackList.Count(); i++ )

        {

        if ( aUid == iBlackList[i] )

            {

            return ETrue;

            }

        }

    return EFalse;

    }

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

// CRsfwMountManImpl::GetAllDrivesL

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

//

TInt CRsfwMountManImpl::GetAllDrivesL(TDriveList& aDriveList)

    {

    GetFsDriveListL(aDriveList, EFalse);

    return aDriveList.Length();

    }

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

// CRsfwMountManImpl::GetRemoteMountList

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

//

TInt CRsfwMountManImpl::GetRemoteMountListL(TDriveList& aDriveList)

    {

    GetFsDriveListL(aDriveList, ETrue);

    return aDriveList.Length();

    }

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

// CRsfwMountManImpl::GetMountInfo

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

//

TInt CRsfwMountManImpl::GetMountInfo(TChar aDriveLetter,

                                 TRsfwMountInfo& aMountInfo)

    {

    TInt err = GetRsfwControlConnection();

    if (err == KErrNone)

        {

        err = iRsfwControl.GetMountInfo(aDriveLetter, aMountInfo);

        }

    return err;

    }

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

// CRsfwMountManImpl::GetRsfwControlConnection

// Set a Remote File Engine control connection unless

// we already have a connection

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

//

TInt CRsfwMountManImpl::GetRsfwControlConnection()

    {

    TInt err = KErrNone;

        {

        err = iRsfwControl.Connect();

        if (!err) 

            {

            iRsfwControlConnected = ETrue;   

            }

        }

    return err;

    }

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

// CRsfwMountManImpl::MountFileSystem

// Install ERemoteFS file system plugin (if not already done) and

// mount a filesystem designated with the given drive letter

// on that file system

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

//

TInt CRsfwMountManImpl::MountFileSystem(const TDesC& /*aDriveName*/,

                                    TChar aDriveLetter)

    {

    return SyncWithMounterExe(ETrue, aDriveLetter);

    }

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

// CRsfwMountManImpl::RemoteDriveCount

// Get the number of remote mounts as seen by the File Server

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

//

TInt CRsfwMountManImpl::RemoteMountCountL()

    {

    // Check if how many mounts there are (also dormant mounts are counted)

    TDriveList driveList;

    return GetRemoteMountListL(driveList);

    }

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

// CRsfwMountManImpl::DoUnmountL

// Do conditional unmounting by consulting the user

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

//

void CRsfwMountManImpl::DoUnmountL(TChar aDriveLetter, TUint /* aFlags */)

    {

    TInt err = ExecuteUnmount(aDriveLetter);

    User::LeaveIfError(err);

    }

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

// CRsfwMountManImpl::ExecuteUnmount

// Do unconditional unmounting

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

//

TInt CRsfwMountManImpl::ExecuteUnmount(TChar aDriveLetter)

    {

    TInt err = GetRsfwControlConnection();

    if (err != KErrNone)

        {

        return err;

        }

    // Drop the mount both from the File Server and from Remote File Engine

    TInt errFs = KErrNone;

    TInt driveNumber;

    err = iFs.CharToDrive(aDriveLetter, driveNumber);

    if (err != KErrNone)

        {

        return err;

        }

    TDriveInfo driveInfo;

    err = iFs.Drive(driveInfo, driveNumber);

    if (err != KErrNone)

        {

        return err;

        }    

    if (driveInfo.iDriveAtt & KDriveAttRemote)

        {

        // The mount is known by the File Server

        errFs = iFs.DismountFileSystem(KRemoteFSName, driveNumber);

        if (errFs == KErrPermissionDenied) 

    	    {

    		// Client does not have sufficient capabilities to do the operation

    		// execute mount with the boot mounter application

    		SyncWithMounterExe(ETrue, aDriveLetter);

    	    }

        }

    // We also request dismount from the RFE because

    // The File Server (eremotefs) does not pass the

    // dismount request to the RFE.

    err = iRsfwControl.DismountByDriveLetter(aDriveLetter);

    if (errFs != KErrNone)

        {

        // give priority to the File Server error

        err = errFs;

        }

    return err;

    }

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

// CRsfwMountManImpl::ConstructL

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

//

void CRsfwMountManImpl::ConstructL(TUint aDefaultFlags,

                                   MRsfwMountManObserver* aMountManObserver)

    {

    iDefaultFlags = aDefaultFlags;

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

    iRsfwControlConnected = EFalse;

    iMountManObserver = aMountManObserver;

    iMountStore = CRsfwMountStore::NewL(this);

    LoadBlackListL();

    }

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

// CRsfwMountManImpl::FreeDriveLetterL

// Find a drive letter that has not yet been allocated by the File Server or

// defined in the mount configuration data base

// If the suggested drive letter (given as an input parameter)

// is already occupied, an adjacent letter in the alphabet is returned.

// Letter '?' as an input parameter is equal to KDefaultDriveLetter.

// Leave with KErrInUse if there are no free drive slots

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

//

TChar CRsfwMountManImpl::FreeDriveLetterL(TChar aDriveLetter)

    {

    if (aDriveLetter == '?')

        {