// Copyright (c) 2003-2009 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:

//

#include "thttpdatacomposer.h"

#include "mhttpbuffersupplier.h"

#include "thttpmessagepanic.h"

const TUint KCarriageReturn	= '\r';

const TUint KLineFeed		= '\n';

const TUint KSpace			= ' ';

const TUint KColon			= ':';

THttpDataComposer::THttpDataComposer(MHttpBufferSupplier& aBufferSupplier)

: iBufferSupplier(aBufferSupplier), iBuffer(TPtr8(NULL, 0))

/**

	Constructor.

	@param		aBufferSupplier	The buffer supplier.

*/

	{

	iRequiredLength = 0;

	}

void THttpDataComposer::Release()

/**

	Release the current data.

	@post		The buffer is empty.

*/

	{

	iBuffer.Zero();

	iRequiredLength = 0;

	}

void THttpDataComposer::Reset()

/**

	Reset the data composer. The data buffer is deleted.

	@post		The data buffer is deleted.

*/

	{

	iBuffer.Set(NULL, 0, 0);

	iRequiredLength = 0;

	iBufferSupplier.DeleteBuffer();

	}

void THttpDataComposer::AddTokenL(const TDesC8& aToken, TDelimiterType aDelimiter)

/**

	Adds the token followed by the specified delimiter to the data buffer. The 

	delimiter types can be Space, Colon or CRLF. The Colon delimiter includes a

	following Space character.

	@param		aToken		The token to be added to the data buffer.

	@param		aDelimiter	The type of delimiter that should follow the token.

	@panic		EHttpMessagePanicBadDelimiterType	An illegal delimiter type 

													was specified.												

*/

	{

	// Update the required length - add token and delimiter length

	iRequiredLength += aToken.Length();

	switch( aDelimiter )

		{

	case EColonSpace:

	case ECRLF:

		{

		// These delimiters have two characters.

		++iRequiredLength;

		// Drop into the Space delimiter case...

		}

	case ESpace:

		{

		// Only a single character

		++iRequiredLength;

		// Drop into the None delimiter case...

		}

	case ENone:

		// No change to required length.

		break;

	default:

		THttpMessagePanic::Panic(THttpMessagePanic::EHttpMessagePanicBadDelimiterType);

		break;

		};

	// Is there enough space in the buffer?

	if( iRequiredLength > iBuffer.MaxLength() )

		{

		// Re-allocate the buffer.

		iBufferSupplier.ReAllocBufferL(iRequiredLength, iBuffer);

		}

	// Append the token and delimiter

	iBuffer.Append(aToken);

	switch( aDelimiter )

		{

	case EColonSpace:

		{

		// Append the colon - drop into the Space case to add a space char

		iBuffer.Append(KColon);

		}

	case ESpace:

		{

		iBuffer.Append(KSpace);

		} break;

	case ECRLF:

		{

		// Append the CR followed by the LF.

		iBuffer.Append(KCarriageReturn);

		iBuffer.Append(KLineFeed);

		} break;

	case ENone:

		// Do nothing...

		break;

	default:

		THttpMessagePanic::Panic(THttpMessagePanic::EHttpMessagePanicBadDelimiterType);

		break;

		};

	}