/*

* Copyright (c) 2005-2006 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:   stores update package to filesystem

*

*/

// INCLUDE FILES

#include <ecom.h>

#include <implementationproxy.h>

#include <centralrepository.h>

#include <sysutil.h> 

#include "fotadiskstoragePrivateCRKeys.h"

#include "fotaDiskStorage.h"

#include "fotadebug.h"

// CONSTANTS

// System Critical Level (128KB) plus 5KB for fota operations.

const TInt KSystemCriticalWorkingspace = 136192;

// MACROS

#ifdef __EABI__

#ifndef IMPLEMENTATION_PROXY_ENTRY

typedef TAny*   TProxyNewLPtr;

#define IMPLEMENTATION_PROXY_ENTRY(aUid, aFuncPtr) {{aUid},(TProxyNewLPtr)(aFuncPtr)}

#endif

#endif

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

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

// CFotaDiskStorage::CFotaDiskStorage()

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

//

CFotaDiskStorage::CFotaDiskStorage ()

    {

    }

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

// CFotaDiskStorage::NewL()

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

//

CFotaDiskStorage* CFotaDiskStorage::NewL()

    {

    FLOG(_L("CFotaDiskStorage::NewL()"));

    CFotaDiskStorage* self = new ( ELeave ) CFotaDiskStorage;

    FLOG(_L("  CFotaDiskStorage created at %X "), self);

    CleanupStack::PushL( self );

    self->ConstructL();

    CleanupStack::Pop( self );

    return self;

    }

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

// CFotaDiskStorage::ConstructL() 

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

//

void CFotaDiskStorage::ConstructL() 

    {

    FLOG(_L("CFotaDiskStorage::ConstructL() >>"));

    TInt err;

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

    // Ensures that fotaserver private dir exists

    err = iFs.MkDirAll(KDummyFilePath);

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

        {

        FLOG(_L(" created priv dir err %d"),err);

        User::Leave ( err ) ;

        }

    FLOG(_L("CFotaDiskStorage::ConstructL()  sessionpath to %S")

                        , &KDummyFilePath,err);

    User::LeaveIfError ( iFs.SetSessionPath ( KDummyFilePath ) );

    // newdummy remains should not exist now. safety.

    err = iFs.Delete ( _L("newdummy") ) ;

    if ( err!=KErrNone && err!= KErrNotFound ) User::Leave (err);

    // Get write limit 

    TInt writelimit( KFileReservationDefaultSize );

    TInt chunksize ( iChunkSize );

    CRepository* centrep( NULL);

    TRAP(err, centrep = CRepository::NewL( KCRUidFotaDiskStorage ) );

    if ( centrep ) 

        {

        err = centrep->Get( KFotaDiskSpaceReservationKey, writelimit );

        err = centrep->Get( KFotaDiskSpaceReservationChunkKey, chunksize );

        }

    iDummySize = writelimit;

    iChunkSize = chunksize;

    delete centrep;

    AdjustDummyStorageL();

    FLOG(_L("CFotaDiskStorage::ConstructL() <<"));

    }

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

// CFotaDiskStorage::~CFotaDiskStorage ()

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

//

CFotaDiskStorage::~CFotaDiskStorage ()

    {

    FLOG(_L("CFotaDiskStorage::~CFotaDiskStorage ()"));

    iFileWriteStream.Close();

    iFs.Close();

    }

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

// CFotaDiskStorage::IsPackageStoreSizeAvailableL

// does the pkg fit to reservation or filesystem

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

//

CFotaStorage::TFreeSpace CFotaDiskStorage::IsPackageStoreSizeAvailableL(TInt& aSize)

    {

    CFotaStorage::TFreeSpace isavailable;

    TInt            swupdSize(0);

    TInt            dummySize(0);

    SpaceAllocatedBySWUPDFilesL( swupdSize, dummySize);

    if ( aSize <= dummySize ) 

        {        

        // fits to reservation

        isavailable = CFotaStorage::EFitsToReservation;

        }

    else

        {

        // doesnt fit to reservation, does it fit to filesystem?

        TInt sizeNeededFromFS = aSize - dummySize ;

        if ( sizeNeededFromFS < 0 ) sizeNeededFromFS = 0;

        TBool critical = SysUtil::FFSSpaceBelowCriticalLevelL( &iFs, sizeNeededFromFS );

        if ( critical )

        	{

					// how much space would be needed

					TVolumeInfo vi;

        	iFs.Volume(vi,EDriveC);

					TInt neededspace = sizeNeededFromFS - vi.iFree + KSystemCriticalWorkingspace;

					FLOG(_L("neededspace = %d vi.iFree = %d "), neededspace , vi.iFree);		

					FLOG(_L(" neededspace = sizeNeededFromFS - vi.iFree + KSystemCriticalWorkingspace;") );

        	//= aSize - vi.iFree;

        	aSize = neededspace;

        	isavailable = CFotaStorage::EDoesntFitToFileSystem;

        	}

        else

        	{

					isavailable = CFotaStorage::EFitsToFileSystem;

        	}

        }

    FLOG(_L("CFotaDiskStorage::IsPackageStoreSizeAvailableL %d<%d (sz vs dummy) => fitstodummy:%d fitstoFS:%d DoesntFitToFS:%d")

    return isavailable;

    }

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

// CFotaDiskStorage::AdjustDummyStorageL()

// Ensure that total of iDummySize bytes are reserved by .swupd files and 

// dummy file.

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

//

TInt CFotaDiskStorage::AdjustDummyStorageL  ( )

    {

    FLOG(_L("CFotaDiskStorage::AdjustDummyStorageL >>"));

    // Count size reserved by .swupd files

    // CDir*       list;

    TInt        err;

    TInt        swupdSize(0);

    TInt        dummySize(0);

    RFile       dummy;

    TRAP(err,SpaceAllocatedBySWUPDFilesL( swupdSize, dummySize));

    // Calculate space for dummy file

    TInt targetsize = iDummySize - swupdSize;

    if ( targetsize<0 ) 

        {

        targetsize=0;

        }

    // Reduce dummy file size 

    if ( dummySize != targetsize || dummySize ==0 ) 

        {

        FLOG(_L("   dummy new size %d (old %d)"), targetsize,dummySize);

        err = dummy.Open(iFs, KDummyFileName, EFileWrite|EFileShareExclusive);

        if (err == KErrNotFound ) 

            {

            User::LeaveIfError(dummy.Replace(iFs, KDummyFileName

                                , EFileWrite|EFileShareExclusive)); 

            }

        else

            if ( err!=KErrNone) User::LeaveIfError (err);

        CleanupClosePushL(dummy);

        TInt err= dummy.SetSize (targetsize);

        if (err!=KErrNone)

        	{

        	FLOG(_L("Error while creating reserved space:  %d "),err );

        	}

        CleanupStack::PopAndDestroy(1); // dummy

        }

    FLOG(_L("CFotaDiskStorage::AdjustDummyStorageL, reserved file size = %d <<"),targetsize);

    return 0;

    }

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

// CFotaDiskStorage::OpenUpdatePackageStore

// Open upd pkg store for writing (writes to dummy file).

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

TInt CFotaDiskStorage::OpenUpdatePackageStoreL(const TInt aPkgId,TInt aNewDummySize

                                                , RWriteStream*& aPkgStore)

	{

    FLOG(_L("CFotaDiskStorage::OpenUpdatePackageStore"));

    TInt        err (KErrNone);

    // Remove reserved memory

    RFile tmp;

    err = tmp.Open(iFs, KDummyFileName, EFileWrite|EFileShareExclusive);

    CleanupClosePushL(tmp);

    if ( !err )

    	{

        FLOG(_L("Removing the reserved memory as download has started"), iDummySize);

        tmp.SetSize( KErrNone );

        }

    CleanupStack::PopAndDestroy( &tmp ); 

	// flexible mem handling: increase dummy size to receive over sized package

    if (iDummySize < aNewDummySize)

    	iDummySize = aNewDummySize;

    FLOG(_L("Newer dummy size = %d"),iDummySize);

    TBuf<KMaxFileName>    swupd;

    swupd.AppendNum(aPkgId);

    swupd.Append(_L(".swupd"));

    err = iFileWriteStream.Open(iFs, swupd, EFileWrite) ;

    if (err == KErrNotFound ) 

        {

        User::LeaveIfError(iFileWriteStream.Replace(iFs, swupd

                                                            , EFileWrite));

        }

    else

        if ( err!=KErrNone) User::LeaveIfError (err);

    //Positioning the seek if the file is already present (in case of resume)

	TEntry entry;

	TInt size (KErrNone);

	err = iFs.Entry(swupd,entry);

	if (!err)

		size = entry.iSize; 

	if (size)

		{

	    MStreamBuf* x = iFileWriteStream.Sink();

	    TStreamPos pos(0);

	    TRAPD(err2, pos = x->TellL(MStreamBuf::EWrite));

	    pos+=size;

	    TRAP(err2, x->SeekL(MStreamBuf::EWrite,pos ));

		}

    aPkgStore = &iFileWriteStream;

    return err;

    }

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

// CFotaDiskStorage::GetDownloadedUpdatePackageSizeL

// Gets the downloaded update package size in bytes

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

void CFotaDiskStorage::GetDownloadedUpdatePackageSizeL(const TInt aPkgId, TInt& aSize)

	{

	FLOG(_L("CFotaDiskStorage::GetDownloadedUpdatePackageSizeL >>"));

	aSize = 0;

    TBuf<KMaxFileName>    swupd;

    swupd.AppendNum(aPkgId);

    swupd.Append(_L(".swupd"));

	TInt err(KErrNone);

	TEntry entry;

	err = iFs.Entry(swupd,entry);

	if (!err)

	aSize = entry.iSize; 

	FLOG(_L("CFotaDiskStorage::GetDownloadedUpdatePackageSizeL,err = %d, aSize = %d <<"),err, aSize);

	}

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

// CFotaDiskStorage::UpdatePackageDownloadComplete

// closes the stream and frees resources

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

void CFotaDiskStorage::UpdatePackageDownloadCompleteL(const TInt aPkgId)

    {

    FLOG(_L("CFotaDiskStorage::UpdatePackageDownloadComplete(const TInt aPkgId)"));

    RFile       fswupd;

    TBuf<KMaxFileName>    fn;

    TInt        err;

    iFileWriteStream.Close();

    if(iBytesWritten<1) 

        {

        FLOG(_L("  no bytes received!"));

//        User::Leave(KErrNotFound);

        return;

        }

    TBuf<KMaxFileName>    swupd;

    swupd.AppendNum(aPkgId);

    swupd.Append(_L(".swupd"));

    // open swupd file for reading

    err = fswupd.Open(iFs, swupd, EFileWrite|EFileShareExclusive);

    FLOG(_L("  open err %d"),err);

    if (err == KErrNotFound ) 

        {

        FLOG(_L("swupd not found, creaeting"));

        User::LeaveIfError(fswupd.Replace(iFs, swupd

                                        ,EFileWrite|EFileShareExclusive)); 

        }

    else

        if ( err!=KErrNone) User::LeaveIfError (err);

    CleanupClosePushL(fswupd);

    RFile       ND;

    User::LeaveIfError ( ND.Replace ( iFs, KDummyFileName, EFileWrite ) );

    CleanupClosePushL  ( ND);

    CleanupStack::PopAndDestroy(2); // dummies

    AdjustDummyStorageL();

    }

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

// CFotaDiskStorage::GetUpdatePackageLocation

// Gets update package location, that is , path.

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

void CFotaDiskStorage::GetUpdatePackageLocationL(const TInt aPkgId

                                                        , TDes8& aPath )

{

    TBuf8<20> fn;

    fn.AppendNum(aPkgId);

    fn.Append(_L8(".swupd"));

    TInt pathlength = ((TDesC16)KDummyFilePath).Length();

    HBufC8* path = HBufC8::NewLC( pathlength );

    path->Des().Copy( KDummyFilePath );

    aPath.Append( path->Des() );

    aPath.Append(fn);

    CleanupStack::PopAndDestroy( path );

}

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

// CFotaDiskStorage::GetUpdatePackageIds

// getupdate package ids

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

void CFotaDiskStorage::GetUpdatePackageIdsL(TDes16& aPackageIdList)

    {

    FLOG(_L("CFotaDiskStorage::GetUpdatePackageIds"));

    // Read all .swupd files and parse pkg ids from filenames

    TInt err;

    CDir*   list;

    err=iFs.GetDir (_L("*.swupd"), KEntryAttNormal ,ESortByName, list  );

    for(int i=0; i<list->Count() ;++i )

        {

        TEntry t = (*list)[i];

        TParse  p;

        TInt16  pkgid;

        p.Set(t.iName,NULL,NULL);

        TLex    lex(p.Name());

        err = lex.Val(pkgid);

        FLOG(_L("   %S"),&t.iName);

        if(err==KErrNone)

            {

            TPtrC  filename(p.Name());

            FLOG(_L("  pkig found: %d"), pkgid);

            TDateTime d = t.iModified.DateTime();

            aPackageIdList.Append (pkgid);   

            }

        }

    delete list;

    }

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

// CFotaDiskStorage::DeleteUpdatePackageL 

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

void  CFotaDiskStorage::DeleteUpdatePackageL (const TInt aPkgId)

    {

    FLOG(_L("CFotaDiskStorage::DeleteUpdatePackageL %d >>"),aPkgId);

    RFile       dummy;

    TInt err=    dummy.Open(iFs, KDummyFileName , EFileWrite|EFileShareExclusive);

    FLOG(_L("Error opening the reserved file...%d"),err);

    CleanupClosePushL ( dummy );

    TRAP(err, DoDeleteUpdatePackageL ( dummy, aPkgId, 0 ));

    CleanupStack::PopAndDestroy(1);

    AdjustDummyStorageL();

    FLOG(_L("CFotaDiskStorage::DeleteUpdatePackageL %d, err = %d <<"),aPkgId, err);

    }

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

// CFotaDiskStorage::DoDeleteUpdatePackageL 

// Delete swupd by chunking data to dummy (param) file. Will grow dummy 

// independently, but takes already allocated bytes into account.

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

void  CFotaDiskStorage::DoDeleteUpdatePackageL ( RFile& dummy, TInt aPkgId

                                                    , TInt aAlreadyAllocated)

    {

    // Open swupd file 

    TInt      err;

    TBuf8<KMaxFileName> swupdpath;

    TBuf<KMaxFileName>  swupdpath16;

    GetUpdatePackageLocationL ( aPkgId, swupdpath) ;

    swupdpath16.Copy ( swupdpath );

    RFile       swupd;

    err = swupd.Open( iFs, swupdpath16, EFileWrite );

    if ( err == KErrNotFound )      return; // no need to delete

    if ( err != KErrNone )          User::Leave ( err );

    CleanupClosePushL ( swupd );

    // Reduce dummy size

    TInt dummytargetsize = iDummySize - aAlreadyAllocated;

    for ( TInt p=0; p<10000 ; ++p )

        {

        TInt        dsize;

        TInt        swupdsize(0);

        User::LeaveIfError( dummy.Size( dsize ) );

        User::LeaveIfError( swupd.Size( swupdsize) );

        TInt        chunk =  swupdsize > iChunkSize ? iChunkSize : swupdsize;

        // Ensure that dummy dosnt get oversized

        if ( dsize <= dummytargetsize  && dsize + chunk >= dummytargetsize ) 

                    chunk = dummytargetsize - dsize;

        // Safety

        if ( dsize >= dummytargetsize ) break;

        FLOG(_L("  deleting swupd:  dummy %d\t  swupd %d\t chunk%d"),dsize

                                                ,swupdsize,chunk);

        if (chunk>0)

            {

            User::LeaveIfError( dummy.SetSize( dsize + chunk ) );

            User::LeaveIfError( swupd.SetSize( swupdsize - chunk ) );

            }

        else 

            break;

        }

    CleanupStack::PopAndDestroy(1); // swupd 

    // Delete swupd  (dummy file is big enough now)

    err = iFs.Delete ( swupdpath16 ) ;

    FLOG(_L("CFotaDiskStorage::DoDeleteUpdatePackageL deleted ,err %d"),err);

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

        {

        User::Leave ( err );

        }

    }

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

// CFotaDiskStorage::SpaceAllocatedBySWUPDFilesL

// Counts space allocated by swupd files

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

void CFotaDiskStorage::SpaceAllocatedBySWUPDFilesL( TInt& aSwupdSize, TInt& aDummySize )

    {

    CDir*       list;

    TInt        err;

    // TInt        (0);

    aSwupdSize = 0;

    aDummySize = 0;

    err = iFs.GetDir (_L("*.swupd"), KEntryAttNormal ,ESortByName, list );

    User::LeaveIfError(err);

    CleanupStack::PushL ( list );

    // get sizes of swupd files

    for(int i=0; i<list->Count() ;++i )

        {

        TEntry t = (*list)[i];

        TParse  p;

        TInt16  pkgid;

        p.Set(t.iName,NULL,NULL);

        TLex    lex(p.Name());

        err = lex.Val(pkgid);

        if(err==KErrNone)

            {

            TPtrC  filename(p.Name());

            aSwupdSize += t.iSize;

            }

        }

    CleanupStack::PopAndDestroy( list );

    // get size of dummyfile

    err = iFs.GetDir (KDummyFileName, KEntryAttNormal ,ESortByName, list );

    User::LeaveIfError(err);

    CleanupStack::PushL ( list );

    if ( list->Count() >0 )

        {

        TEntry t = (*list)[0];

        aDummySize = t.iSize;

        }

    CleanupStack::PopAndDestroy( list );

    FLOG(_L("CFotaDiskStorage::SpaceAllocatedBySWUPDFilesL dummy:%d swupd:%d")

                        ,aDummySize,aSwupdSize);

    }        

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

// Global implementation uid array

// Define the Implementation UIDs for JP2K decoder.

// (other items were commented in a header).

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

//

const TImplementationProxy ImplementationTable[] =

{

    // implementation_uid