/*

* Copyright (c) 2007 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: Helper class for unzipping KMZ file.

*

*

*/

#include "EPos_PosLmUnzipUtil.h"

const TInt KMaxDirName = 255;

_LIT(KExtractZipPath, "extracts\\");

void PosLmUnzipUtil::DoUnzipL(const TDesC& aPath) 

{

	RFs fs; 

	User::LeaveIfError(fs.Connect()); //Connect to file session

	CleanupClosePushL(fs);

	TFileName dirFileName(aPath);

	UnzipFileL(fs, &dirFileName);

	CleanupStack::PopAndDestroy(&fs);

}

void PosLmUnzipUtil::UnzipFileL(RFs& aFs, TFileName* aFileName) 

{

	CZipFile* zipFile = NULL;

	CZipFileMember* member = NULL;

	CZipFileMemberIterator* fileMembers = NULL;

	zipFile = CZipFile::NewL(aFs,*aFileName);

	CleanupStack::PushL(zipFile);

	User::LeaveIfError(zipFile->OpenL());

	fileMembers = zipFile->GetMembersL();

	CleanupStack::PushL(fileMembers);

	member = fileMembers->NextL();

	while (member) 

	{

	//You must take ownership of the member object created for you by NextL()!

	CleanupStack::PushL(member);

	ExtractFileL(aFs, member, zipFile, aFileName);

	CleanupStack::PopAndDestroy(); //member

	member = fileMembers->NextL();

	}

	zipFile->Close();

	CleanupStack::PopAndDestroy(2); //fileMembers, zipFile

}

void PosLmUnzipUtil::ExtractFileL(RFs& aFs, CZipFileMember* aMember, CZipFile* aZipFile, TFileName* aFileName) 

{

	TInt loop=0;

	HBufC* name = aMember->Name()->AllocLC();

	// Change any instances of '/' to '\' in zipped file paths

	while (loop < name->Length()) 

	{

		if ((*name)[loop] == '/') 

		{

			name->Des()[loop] = '\\';

		}

		loop++;

	}

	//set target path

	TBuf<KMaxDirName> privatePath;

	aFs.PrivatePath(privatePath);

	TFileName fn;

	fn.Append(privatePath);

	fn.Append(KExtractZipPath);

	fn.Append(*name);

	//create target path if not exist.

	TInt err = aFs.MkDirAll(fn);

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

	{

		User::Leave(err);

	}

	RFile expandedMember;

	User::LeaveIfError(expandedMember.Replace(aFs, fn, EFileShareAny|EFileWrite));

	CleanupClosePushL(expandedMember);

	RZipFileMemberReaderStream* fileStream; 

	// KCompressionMethodNotSupported is possible in decompressing file here

	User::LeaveIfError(aZipFile->GetInputStreamL(aMember, fileStream));

	CleanupStack::PushL(fileStream); 

	// Assume file contents are 8-bit data

	TUint32 size = aMember->UncompressedSize();

	HBufC8* bytes = HBufC8::NewLC(size);

	TPtr8 ptr = bytes->Des(); //Obtain a modifiable descriptor

	fileStream->Read(ptr, size); 

	// save the unzipped contents to file

	User::LeaveIfError(expandedMember.Write(ptr));

	expandedMember.Close();

	CleanupStack::PopAndDestroy(4); //bytes, fileStream, expandedMember, name

}