// Copyright (c) 2004-2009 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:

// Implementation of sbeconfig

// 

//

/**

 @file

*/

#include <e32std.h>

#include "sbepanic.h"

#include "sbeconfig.h"

#include "sblog.h"

#include <xml/parser.h>

namespace conn

	{

	const TInt KSIDLength = 8;

	// XML type

	_LIT8(KMimeType, "text/xml");

	// elements

	_LIT8(KConfig, "sbe_config");

	_LIT8(KHeap, "heap");

	_LIT8(KCentRep, "central_repository");

	_LIT8(KDrives, "exclude_drives");

	_LIT8(KAppCloseDelay, "app_close_delay");

	_LIT8(KSize, "size");

	_LIT8(KUid, "uid");

	_LIT8(KList, "list");

	_LIT8(KRedFact, "reduction_factor");

	_LIT8(KMaxRetries, "max_retries");

	_LIT8(KDelay, "delay");

	// default setting if no file found

	const TInt KSBEGSHDefaultSize = 2097152;

	const TInt KSBEGSHReductionFactor = 2;

	const TInt KSBEGSHMaxRetries = 5;

	const TInt KMinHeapSize = 131072;

	const TInt KDefaultDelay = 0;

	_LIT_SECURE_ID(KCentRepSID,0x10202BE9);

	_LIT(KConfigFile, "sbeconfig.xml");

	/**

	Symbian Constructor

	@param RFs& reference to RFs

	@return CSBEConfig* pointer to CSBEConfig

	*/

	CSBEConfig* CSBEConfig::NewL(RFs& aRFs)

		{

		CSBEConfig* self = new (ELeave) CSBEConfig(aRFs);

		return self;

		}

	/**

	C++ Constructor

	*/

	CSBEConfig::CSBEConfig(RFs& aRFs) : iRFs(aRFs), iFileName(KConfigFile), iConfigTagVisited(EFalse)

		{

		SetDefault();

		}

	/** 

	Destructor

	*/

	CSBEConfig::~CSBEConfig()

		{

		delete iConverter;

		}

	/**

	Heap Values

	@param TInt& aMaxSize of the heap to try to allocate

	@param TInt& aReductionFactor in case allocation fail

	@param TInt& number of retries to try to reduce the heap by the ReductionFactor

	*/

	void CSBEConfig::HeapValues(TInt& aMaxSize, TInt& aReductionFactor, TInt& aMaxRetries) const

		{

		aMaxSize = iSBEGSHMaxSize;

		aReductionFactor = iReductionFactor;

		aMaxRetries = iMaxRetries;

		}

	/**

	Secure Id for central repository, needed deprecated use of centrep tag in xml

	@return TSecureId& aSecureId

	*/	

	TSecureId CSBEConfig::CentRepId() const

		{

		return iCentRepId;

		}

	/**

	Exclude list of drives from backup/restore

	@return TDriveList& aDriveList

	*/	

	const TDriveList& CSBEConfig::ExcludeDriveList() const

		{

		return iDrives;

		}

	/**

	Extra time delay to close all non-system apps 

	@return TInt& iAppCloseDelay

	*/

	TUint CSBEConfig::AppCloseDelay() const

		{

		return iAppCloseDelay;

		}

	/**

	Set the values to Defaults

	*/	

	void CSBEConfig::SetDefault()

		{

		iSBEGSHMaxSize = KSBEGSHDefaultSize;

		iCentRepId = KCentRepSID;

		iDrives.SetLength(KMaxDrives);

		iDrives.FillZ();

		iDrives[EDriveZ] = ETrue;

		iReductionFactor = KSBEGSHReductionFactor;

		iMaxRetries = KSBEGSHMaxRetries;

		iAppCloseDelay = KDefaultDelay;

		}

	/**

	Method to convert string of drives (eg. cdez) to member variable TDriveList

	@param const TDesC8& reference to string

	*/	

	TInt CSBEConfig::StringToDrives(const TDesC8& aDes)

		{

		iDrives.SetLength(KMaxDrives);

		iDrives.FillZ();

		TInt err = KErrNone;

		TInt length = aDes.Length();

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

			{

			TInt pos;

			err = iRFs.CharToDrive(aDes.Ptr()[i], pos);

			if (err != KErrNone)

				{

				break;

				}

			iDrives[pos] = ETrue;

			}

		return err;

		}

	/**

	Parses the config file if found

	@leave with System wide Error Codes

	*/	

	void CSBEConfig::ParseL()

		{

		iRFs.PrivatePath(iFileName);

		TFindFile findFile(iRFs);

		User::LeaveIfError(findFile.FindByPath(KConfigFile, &iFileName));

		iFileName = findFile.File();

		// Connect to the parser

		CParser* parser = CParser::NewLC(KMimeType, *this);

		// Parse the file

		Xml::ParseL(*parser, iRFs, iFileName);

		CleanupStack::PopAndDestroy(parser);

		}

	/**

	A method to handle attributes

	@param RAttributeArray& aAttributes 

	@return TInt System Wide Error

	*/	

	TInt CSBEConfig::HandleAttributesElement(const RAttributeArray& aAttributes)

		{

		TInt err = KErrNone;

		// Loop through reading out attribute values

		const TUint count = aAttributes.Count();

		for (TInt x = 0; x < count && err == KErrNone; x++)

			{

			TPtrC8 attrib = aAttributes[x].Attribute().LocalName().DesC();

			TPtrC8 value = aAttributes[x].Value().DesC();

			if (!attrib.CompareF(KDelay))

				{

				TLex8 lex(value);

				TInt appCloseDelay = 0;

				err = lex.Val(appCloseDelay);

				if (appCloseDelay < 0)

					{

					__LOG("CSBEConfig::HandleAttributesElement() - Configuration Error: the time delay is negative");

					err = KErrCorrupt;

					}

				else

					{

					iAppCloseDelay = appCloseDelay;

					}

				}

			if (!attrib.CompareF(KRedFact))

				{

				TLex8 lex(value);

				err = lex.Val(iReductionFactor);

				if (iReductionFactor < 0)

					{

					__LOG("CSBEConfig::HandleAttributesElement() - Configuration Error: the reductionFactor is negative");

					err = KErrCorrupt;

					}

				}

			else if (!attrib.CompareF(KMaxRetries))

				{

				TLex8 lex(value);

				err = lex.Val(iMaxRetries);

				if (iMaxRetries < 0)

					{

					__LOG("CSBEConfig::HandleAttributesElement() - Configuration Error: the maxRetries is negative");

					err = KErrCorrupt;

					}

				}

			if (!attrib.CompareF(KSize))

				{

				TLex8 lex(value);

				err = lex.Val(iSBEGSHMaxSize);

				if (iSBEGSHMaxSize < KMinHeapSize)

					{

					__LOG1("CSBEConfig::HandleAttributesElement() - Configuration Error: heap size is less then minimum %d", KMinHeapSize);

					err = KErrCorrupt;

					}

				} // if

			else if (!attrib.CompareF(KUid))

				{

				TLex8 lex;

				if (value.Length() >= KSIDLength)

					{

					lex = value.Right(KSIDLength);

					err = lex.Val(iCentRepId.iId, EHex);

					if (iCentRepId.iId == 0)

						{

						err = KErrCorrupt;

						}

					}

				if (err != KErrNone)

					{

					__LOG("CSBEConfig::HandleAttributesElement() - Configuration Error: central_repostiory is NOT a HEX number");

					err = KErrCorrupt;

					}

				} // else if

			else if (!attrib.CompareF(KList))

				{

				err = StringToDrives(value);

				if (err != KErrNone)

					{

					__LOG("CSBEConfig::HandleAttributesElement() - Configuration Error: list doesn't have valid characters from a-z");

					}

				} // else if

			} // for x

		return err;

		}

// From MContentHandler

	void CSBEConfig::OnStartDocumentL(const RDocumentParameters& /*aDocParam*/, TInt /*aErrorCode*/)

	/**

	Start of the document, creates Character Converter to convert from/to unicode

	@see MContentHandler::OnStartDocumentL()

	@leave if fails to set encoding

	*/

		{

		// Create a converter for converting strings to Unicode

		iConverter = CCnvCharacterSetConverter::NewL();

		// We only convert from UTF-8 to UTF-16

		if (iConverter->PrepareToConvertToOrFromL(KCharacterSetIdentifierUtf8, iRFs) == CCnvCharacterSetConverter::ENotAvailable)

			{

			User::Leave(KErrNotFound);

			}

		}

	void CSBEConfig::OnEndDocumentL(TInt /*aErrorCode*/)

	/**

	End of document. destroys converter object

	@see MContentHandler::OnEndDocumentL()

	*/

		{

		// We've finished parsing the document, hence destroy the converter object

		delete iConverter;

		iConverter = NULL;

		}

	void CSBEConfig::OnStartElementL(const RTagInfo& aElement, const RAttributeArray& aAttributes, TInt /*aErrCode*/)

	/**

	Element to parse on the start

	@see MContentHandler::OnStartElementL()

	@param aElement RTagInfo&

	@param aAttributes RAttributeArray&

	*/

		{

		TInt err = KErrNone;

		TPtrC8 localName(aElement.LocalName().DesC());

		if (!localName.CompareF(KConfig))

			{

			iConfigTagVisited = ETrue;

			} // if

		else if (iConfigTagVisited)

			{

			if (!localName.CompareF(KHeap) || !localName.CompareF(KCentRep) || !localName.CompareF(KDrives) || !localName.CompareF(KAppCloseDelay))

				{

				err = HandleAttributesElement(aAttributes);

				} // if

			else

				{

				err = KErrCorrupt;

				} // else if

			} // else if

		else

			{

			err = KErrCorrupt;

			}

		User::LeaveIfError(err);

		}

	void CSBEConfig::OnEndElementL(const RTagInfo& /*aElement*/, TInt /*aErrorCode*/)

	/**

	Element to parse at the end

	@see MContentHandler::OnEndElementL()

	@param const aElement RTagInfo&

	*/

		{

		}

	void CSBEConfig::OnContentL(const TDesC8& /*aBytes*/, TInt /*aErrorCode*/)

	/** 

	@see MContentHandler::OnContentL()

	*/

		{

		}

	void CSBEConfig::OnStartPrefixMappingL(const RString& /*aPrefix*/, const RString& /*aUri*/, TInt /*aErrorCode*/)

	/** 

	@see MContentHandler::OnStartPrefixMappingL()

	*/

		{

		}

	void CSBEConfig::OnEndPrefixMappingL(const RString& /*aPrefix*/, TInt /*aErrorCode*/)

	/** 

	@see MContentHandler::OnEndPrefixMappingL()

	*/

		{

		}

	void CSBEConfig::OnIgnorableWhiteSpaceL(const TDesC8& /*aBytes*/, TInt /*aErrorCode*/)

	/** 

	@see MContentHandler::OnIgnorableWhiteSpaceL()

	*/

		{

		}

	void CSBEConfig::OnSkippedEntityL(const RString& /*aName*/, TInt /*aErrorCode*/)

	/** 

	@see MContentHandler::OnSkippedEntityL()

	*/

		{

		}

	void CSBEConfig::OnProcessingInstructionL(const TDesC8& /*aTarget*/, const TDesC8& /*aData*/, TInt /*aErrorCode*/)

	/** 

	@see MContentHandler::OnProcessingInstructionL()

	*/

		{

		}

	void CSBEConfig::OnError(TInt /*aErrorCode*/)

	/** 

	@see MContentHandler::OnError()

	*/

		{

		}

	TAny* CSBEConfig::GetExtendedInterface(const TInt32 /*aUid*/)

	/** 

	@see MContentHandler::GetExtendedInterface()

	*/

		{

		return NULL;

		}

	}