/*

* Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).

* 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: 

*

*/

#include "scrhelpercommon.h"

#include "scrhelperserver.h"

#include <e32cmn.h>

#include <e32debug.h>

#include <usif/scr/scrcommon.h>

using namespace Usif;

static const TUint scrHelperRangeCount = 2;

static const TInt scrHelperRanges[scrHelperRangeCount] =

	{

	0,							 // Range-0 - 0 to EBaseSession-1. Not used.

	CScsServer::EBaseSession,	 // Range-1 - EBaseSession to KMaxTInt inclusive.

	};

static const TUint8 scrHelperElementsIndex[scrHelperRangeCount] =

	{

	CPolicyServer::ENotSupported, // Range 0 is not supported.

	0,							  // Range 1 must come from the SCR Server.

	};							

static const CPolicyServer::TPolicyElement scrHelperElements[] =

	{

	{_INIT_SECURITY_POLICY_S0(KUidScrServer.iUid), CPolicyServer::EFailClient}

	};

static const CPolicyServer::TPolicy scrHelperPolicy =

	{

	CPolicyServer::EAlwaysPass, // Allow all connections

	scrHelperRangeCount,

	scrHelperRanges,

	scrHelperElementsIndex,

	scrHelperElements,

	};

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

// CScrHelperServer

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

CScrHelperServer::CScrHelperServer()

	:	CScsServer(ScrHelperServerVersion(), scrHelperPolicy)

	{

	// empty

	}

CScrHelperServer::~CScrHelperServer()

	{

	iFs.Close();

	}

CScrHelperServer* CScrHelperServer::NewLC()

	{

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

	CleanupStack::PushL(self);

	self->ConstructL();

	return self;

	}

void CScrHelperServer::ConstructL() 

	{

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

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

	StartL(KScrHelperServerName);

	CScsServer::ConstructL(KScrHelperServerShutdownPeriod);	

	}

CScsSession* CScrHelperServer::DoNewSessionL(const RMessage2& aMessage)

/**

	Implement CScsServer by allocating a new instance of CScrHelperSession.

	@param	aMessage	Standard server-side handle to message.

	@return				New instance of the SCR Helper session class which is owned by the caller.

 */

	{

	DEBUG_PRINTF(_L8("SCR Helper session creation!"));

	return CScrHelperSession::NewL(*this, aMessage);

	}

inline RFs& CScrHelperServer::FileServer()

	{

	return iFs;

	}

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

// CScrHelperSession

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

CScrHelperSession::CScrHelperSession(CScrHelperServer& aServer)

	:	CScsSession(aServer)

	{

	// empty

	}

CScrHelperSession::~CScrHelperSession()

	{

	// empty

	}

CScrHelperSession* CScrHelperSession::NewL(CScrHelperServer &aServer, const RMessage2& aMessage)

/**

	Factory function allocates new instance of CScrSession.

	@param aServer  SCR Helper Server object.

	@param aMessage	Standard server-side handle to message. Not used.

	@return			Newly created instance of CScrHelperSession which is owned by the caller.

 */

	{

	(void)aMessage; // Make the compiler happy in release mode

	CScrHelperSession* self = new (ELeave) CScrHelperSession(aServer);

	CleanupStack::PushL(self);

	self->ConstructL();

	CleanupStack::Pop(self);

	return self;

	}

TBool CScrHelperSession::DoServiceL(TInt aFunction, const RMessage2& aMessage)

	{

	TScrHelperServerMessages f = static_cast<TScrHelperServerMessages>(aFunction);

	RFs& fs =  static_cast<CScrHelperServer*>(&iServer)->FileServer();

	switch (f)

		{

		case EGetDatabaseFileHandle:

			GetFileHandleL(fs, aMessage, KScrDatabaseFilePath);

			break;

		case EGetJournalFileHandle:

			GetFileHandleL(fs, aMessage, KScrJournalFilePath);

			break;

		default:

			User::Leave(KErrNotSupported);

		}

	//RMessage2 object is closed by both TransferToClient() and SCS framework.

	//return EFalse to prevent SCS to close the message object.

	return EFalse;

	}

void CopyDbFromROMToSystemL(RFs& aFs, const TDesC& aTargetPath)

	{

	CFileMan* fileManager = CFileMan::NewL(aFs);

	CleanupStack::PushL(fileManager);

	User::LeaveIfError(fileManager->Copy(KScrDbRomPath, aTargetPath, 0));

	// Reset the read-only attribute on the copied file

	User::LeaveIfError(aFs.SetAtt(aTargetPath, 0, KEntryAttReadOnly));

	CleanupStack::PopAndDestroy(fileManager);

	}

void CScrHelperSession::GetFileHandleL(RFs& aFs, const RMessage2& aMessage, const TDesC& aFileName)

	{

	DEBUG_PRINTF2(_L("Returning file handle of %S."), &aFileName);

	RBuf filePath;

	filePath.CreateL(aFileName.Length());

	filePath.CleanupClosePushL();

	filePath.Copy(aFileName);

	filePath[0] = aFs.GetSystemDriveChar();

	TInt err = aFs.MkDirAll(filePath);

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

		{

		DEBUG_PRINTF3(_L("An error (%d) occured while making all directories of %S."), err, &filePath);

		User::Leave(err);

		}

	RFile file;

	TEntry entry;

	if(KErrNone == aFs.Entry(filePath, entry))

		{ // The file exists, just open it.

		User::LeaveIfError(file.Open(aFs, filePath, EFileShareAny|EFileWrite));

		}    

	else

		{ // The file doesn't exist. First, check if the requested file is database or journal file.

		if(KScrDatabaseFilePath() == aFileName)

			{ // This is the database file. Copy the default one into the requested location.

			DEBUG_PRINTF(_L8("SCR database file doesn't exist. It is being copied from ROM"));

			CopyDbFromROMToSystemL(aFs, filePath);

			 // Then, open the file.

			User::LeaveIfError(file.Open(aFs, filePath, EFileShareAny|EFileWrite));

			}

		else

			{ // This is the journal file, simply create an empty file.

			User::LeaveIfError(file.Create(aFs, filePath, EFileShareAny|EFileWrite));

			}

		}

	CleanupStack::PopAndDestroy(&filePath);

	CleanupClosePushL(file);

	// Store the RFile handle into the package buffer in slot 0 and complete the message with the RFs handle

	User::LeaveIfError(file.TransferToClient(aMessage, 0));

	ASSERT(aMessage.IsNull());  // The message should have been completed

	CleanupStack::PopAndDestroy(&file);

	}