/*

* 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: Implementation of policymanagement components

*

*/

// INCLUDE FILES

#include "OperationParser.h"

#include "PolicyParser.h"

#include "OperationParserConstants.h"

#include "PolicyManager.h"

#include "PolicyStorage.h"

#include "debug.h"

#include "ErrorCodes.h"

// CONSTANTS

_LIT8( KCDataElement, "KCData");

const TChar KXMLElementEndMark = '>';

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

// COperationParser::COperationParser()

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

//

COperationParser::COperationParser()

{

}

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

// COperationParser::~COperationParser()

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

//

COperationParser::~COperationParser()

{

	ResetOperations();

	delete iParser;

}

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

// COperationParser::NewL()

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

//

COperationParser * COperationParser::NewL( const TDesC8& aOperationDescription)

{

	//2nd phase constructor

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

	CleanupStack::PushL( self);

	self->ConstructL( aOperationDescription);

	CleanupStack::Pop( self);

	return self;

}

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

// COperationParser::ConstructL()

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

//

void COperationParser::ConstructL( const TDesC8& aOperationDescription)

{

	//2nd phase constructor

	iParser = Xml::CParser::NewL( _L8( "text/xml"), *this );	

	iXMLContent.Set( aOperationDescription);

}	

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

// COperationParser::ResetOperations()

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

//

void COperationParser::ResetOperations()

{

	for ( TInt i(0); i < iOperations.Count(); i++)

	{

		delete iOperations[i];

		iOperations[i] = NULL;

	}

	iOperations.Close();

}

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

// COperationParser::ConstructL()

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

//

void COperationParser::HandleErrorL( const TDesC8& aErrorTxt, const TDesC8& aElementName)

{

	//parse error text

	iReturnText->Copy( _L8("(Line "));

	iReturnText->AppendNum( iActiveLine);

	iReturnText->Append( _L8(") "));

	iReturnText->Append( aErrorTxt);

	iReturnText->Append( _L8(": "));

	iReturnText->Append( aElementName);

	RDEBUG_2("Operation parser error: %S", &iReturnText);

	User::Leave( KErrOpParser);	

}

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

// COperationParser::ParseOperationsL()

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

//

void COperationParser::ParseOperationsL( TDes8& aReturnTxt)

{

	//reset line counter and initialize XML-parser

	iActiveLine = 0;

	iReturnText = &aReturnTxt;

	iXMLStackPointer = 0;

	ResetOperations();

	//initliaze symbian xml parser

	iParser->ParseBeginL();

	//Max size of chunk (max text length, which go once to parser)

	const TInt KMaxChunkLength = 1000;

	TPtrC8 xml = iXMLContent;

	TPtrC8 chunk;

	TInt length = KMaxChunkLength < xml.Length() ? KMaxChunkLength : xml.Length();

	do

	{

		//Find line feed mark (asciicode 10)

		TInt indexLineFeed = xml.Locate(10);

		TInt elementEndIndex = xml.Locate( KXMLElementEndMark );

		if ( elementEndIndex != KErrNotFound && (elementEndIndex < indexLineFeed || indexLineFeed == KErrNotFound))

		{

			length = elementEndIndex + 1;

		}

		else

		if ( indexLineFeed != KErrNotFound)

		{ 

			//max text, which go to parser is one line or KMaxChunkLength. Counter tracks line, where parsing is going

			iActiveLine++;

			length = indexLineFeed + 1;

		}

		//set chunk pointer

		chunk.Set( xml.Left(length));

		if ( ParserUtility::ContainsCDataField( chunk))

		{

			//cdata mark indicated in chunk, remove cdata area from chunk, 

			TPtrC8 cdata;

			ParserUtility::ReadCDataAreaL( cdata, chunk, xml);

			//pointer to cdata content

			ParserUtility::RemoveCDataMarksL( cdata);

			if ( !iActiveOperation)

			{

				HandleErrorL( ParserErrors::UnexpectedElement, KCDataElement); 

			}

			iActiveOperation->SetXACMLContentL( cdata);

			iActiveOperation->SetLineOffset( iActiveLine - 1);

			iActiveLine += ParserUtility::LineCounter( cdata);

		}

		else

		{

			//set remaining XACML description to xacmlDescription

			xml.Set( xml.Mid(length));			

		}

		//'|' and '~' are not allowed in policy system...

		if ( chunk.Locate('|') != KErrNotFound || chunk.Locate('~') != KErrNotFound)

		{

			HandleErrorL( ParserErrors::InvalidMark, ParserErrors::InvalidMarks); 

		}

		//drive description to parser	

		iParser->ParseL( chunk);

		length = KMaxChunkLength < xml.Length() ? KMaxChunkLength : xml.Length();

	} while ( length);

	//close parser

	iParser->ParseEndL();	

}

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

// COperationParser::OnProcessingInstructionL()

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

//

void COperationParser::ExecuteL( TInt aIndex, CPolicyManager *aManager)

{

	iOperations[ aIndex]->ExecuteL( aManager);

}

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

// COperationParser::OperationCount()

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

//

TInt COperationParser::OperationCount()

{

	return iOperations.Count();

}

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

// COperationParser::OnStartDocumentL()

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

//

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

{

}

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

// COperationParser::OnEndDocumentL()

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

//

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

{

}

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

// COperationParser::OnStartElementL()

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

//

void COperationParser::OnStartElementL(const Xml::RTagInfo& aElement, const Xml::RAttributeArray& aAttributes, TInt /*aErrorCode*/)

{

	using namespace OperationParserConstants;

  	TPtrC8 elementName = aElement.LocalName().DesC();

  	CPolicyStorage* policyStorage = CPolicyStorage::PolicyStorage();

	//package starts operation package

  	if ( elementName != XMLStack[ iXMLStackPointer] )

  	{

		HandleErrorL( ParserErrors::UnexpectedElement, elementName); 

  	}

  	if ( elementName == Operation )

  	{

  		if ( !iActiveOperation )

  		{

  			iActiveOperation = COperationInfo::NewL();

  		}

  		else

  		{

  			HandleErrorL( ParserErrors::UnexpectedElement, elementName); 

  		}

  	} 

   	//search element attributes

	for ( TInt i = 0; i < aAttributes.Count(); i++)

	{

		Xml::RAttribute attribute( aAttributes[i]);

		TPtrC8 attributeName = attribute.Attribute().LocalName().DesC();

		TPtrC8 attributeValue = attribute.Value().DesC();

		if ( iActiveOperation && elementName == Operation )

		{

			if ( attributeName == ActionId )

			{

				iActiveOperation->SetActionIdL( attributeValue );

			}

			else if ( attributeName == TargetId)

			{

				iActiveOperation->SetTargetElementIdL( attributeValue );

			}

			else if ( attributeName == UseBearerCert)

			{

				if ( attributeValue == True)

				{

					iActiveOperation->UseBearerCertificate( ETrue);

				}

				else

				{

					iActiveOperation->UseBearerCertificate( EFalse);

				}

			}

			else if ( attributeName == AddServerId)

			{

				if ( KErrNone != policyStorage->AddNewServerId( attributeValue))

				{

	  				HandleErrorL( ManagementErrors::ServerIdManagementError, attributeName); 

				}

			}

			else if ( attributeName == RemoveServerId)

			{

				if ( attributeValue == ResetAllTag)

				{

					if ( KErrNone != policyStorage->ResetServerIdList())

					{

	  					HandleErrorL( ManagementErrors::ServerIdManagementError, attributeName); 

					}

				}

				else

				{

					if ( KErrNone != policyStorage->RemoveServerId( attributeValue))

					{

		  				HandleErrorL( ManagementErrors::ServerIdManagementError, attributeName); 

					}

				}

			}

			else

			{

  				HandleErrorL( ParserErrors::UnexpectedAttribute, attributeName); 

			}

		}

		else

		{

  			HandleErrorL( ParserErrors::UnexpectedAttribute, attributeName); 

		}

	}

	iXMLStackPointer++;

}

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

// COperationParser::OnEndElementL()

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

//

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

{

	using namespace OperationParserConstants;

  	TPtrC8 elementName = aElement.LocalName().DesC();

	//Add new operation operation list

	if ( elementName == Operation )

  	{

  		iOperations.AppendL( iActiveOperation);

  		iActiveOperation = NULL;

  	}

  	iXMLStackPointer--;

}

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

// COperationParser::OnContentL()

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

//

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

{

}

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

// COperationParser::OnStartPrefixMappingL()

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

//

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

{

}

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

// COperationParser::OnEndPrefixMappingL()

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

//

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

{

}

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

// COperationParser::OnIgnorableWhiteSpaceL()

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

//

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

{

}

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

// COperationParser::OnSkippedEntityL()

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

//

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

{

}

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

// COperationParser::OnProcessingInstructionL()

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

//

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

{

}

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

// COperationParser::OnError()

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

//

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

{

	//parse error text

	iReturnText->Copy( _L8("(Line "));

	iReturnText->AppendNum( iActiveLine);

	iReturnText->Append( _L8(") "));

	iReturnText->Append( ParserErrors::SyntaxError);

	RDEBUG_2("Operation parser error: %S", &iReturnText);

	// PolicyEngine expects this leave in error conditions -> prgram flow

	// goes to correct TRAP after this. Can not remove this Leave although

	// the function name does not have "L"

}

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

// COperationParser::GetExtendedInterface()

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

//

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

{

	return NULL;

}

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

// COperationParser::GetExtendedInterface()

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

//

COperationInfo::COperationInfo()

{

}

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

// COperationParser::~COperationInfo()

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

//

COperationInfo::~COperationInfo()

{

	delete iActionId;

	delete iTargetElement;

}

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

// COperationParser::NewL()

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

//

COperationInfo* COperationInfo::NewL()

{

	return new (ELeave) COperationInfo();

}

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

// COperationInfo::UseBearerCertificate()

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

//

void COperationInfo::UseBearerCertificate( const TBool aUseBearerCertificate)

{

	iUseBearerCertificate = aUseBearerCertificate;

}

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

// COperationParser::SetActionIdL()

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

//	

void COperationInfo::SetActionIdL( const TDesC8& aActionId)

{

	if ( iActionId )

	{

		User::Leave( KErrOpParser);

	}

	iActionId = aActionId.AllocL();

}

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

// COperationParser::SetTargetElementIdL()

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

//

void COperationInfo::SetTargetElementIdL( const TDesC8& aTargetElementId)

{

	if ( iTargetElement )

	{

		User::Leave( KErrOpParser);

	}

	iTargetElement = aTargetElementId.AllocL();

}

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

// COperationParser::SetXACMLContentL()

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

//

void COperationInfo::SetXACMLContentL( const TPtrC8& aXACMLContent)

{

	if ( iXACMLContent.Length())

	{

		User::Leave( KErrOpParser);