/**************************************************************
 * 
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 * 
 *************************************************************/


#ifndef _TOOLS_INETSTRM_HXX
#define _TOOLS_INETSTRM_HXX

#include "tools/toolsdllapi.h"
#include <sal/types.h>
#include <tools/string.hxx>

class INetMessage;
class INetMIMEMessage;
class INetHTTPMessage;
class SvMemoryStream;
class SvStream;

/*=========================================================================
 *
 * INetStream Interface.
 *
 *=======================================================================*/
enum INetStreamStatus
{
	INETSTREAM_STATUS_LOADED     = -4,
	INETSTREAM_STATUS_WOULDBLOCK = -3,
	INETSTREAM_STATUS_OK         = -2,
	INETSTREAM_STATUS_ERROR      = -1
};

/*
 * INetIStream.
 */
class TOOLS_DLLPUBLIC INetIStream
{
	// Not implemented.
	INetIStream (const INetIStream& rStrm);
	INetIStream& operator= (const INetIStream& rStrm);

protected:
	virtual int GetData (sal_Char *pData, sal_uIntPtr nSize) = 0;

public:
	INetIStream ();
	virtual ~INetIStream (void);

	int Read (sal_Char *pData, sal_uIntPtr nSize);

	static void Decode64 (SvStream& rIn, SvStream& rOut);
	static void Encode64 (SvStream& rIn, SvStream& rOut);
};

/*
 * INetOStream.
 */
class INetOStream
{
	// Not implemented.
	INetOStream (const INetOStream& rStrm);
	INetOStream& operator= (const INetOStream& rStrm);

protected:
	virtual int PutData (
		const sal_Char *pData, sal_uIntPtr nSize) = 0;

public:
	INetOStream ();
	virtual ~INetOStream (void);

	int Write (const sal_Char *pData, sal_uIntPtr nSize);
};

/*
 * INetIOStream.
 */
class INetIOStream : public INetIStream, public INetOStream
{
	// Not implemented.
	INetIOStream (const INetIOStream& rStrm);
	INetIOStream& operator= (const INetIOStream& rStrm);

public:
	INetIOStream (sal_uIntPtr nIBufferSize = 0, sal_uIntPtr nOBufferSize = 0);
	virtual ~INetIOStream (void);
};

/*=========================================================================
 *
 * INetMessageStream Interface.
 *
 *=======================================================================*/
enum INetMessageStreamState
{
	INETMSG_EOL_BEGIN,
	INETMSG_EOL_DONE,
	INETMSG_EOL_SCR,
	INETMSG_EOL_FCR,
	INETMSG_EOL_FLF,
	INETMSG_EOL_FSP,
	INETMSG_EOL_FESC
};

/*
 * INetMessageIStream (Message Generator) Interface.
 */
class INetMessageIStream : public INetIStream
{
	INetMessage    *pSourceMsg;
	sal_Bool            bHeaderGenerated;

	sal_uIntPtr           nBufSiz;
	sal_Char       *pBuffer;
	sal_Char       *pRead;
	sal_Char       *pWrite;

	SvStream       *pMsgStrm;
	SvMemoryStream *pMsgBuffer;
	sal_Char       *pMsgRead;
	sal_Char       *pMsgWrite;

	virtual int GetData (sal_Char *pData, sal_uIntPtr nSize);

	// Not implemented.
	INetMessageIStream (const INetMessageIStream& rStrm);
	INetMessageIStream& operator= (const INetMessageIStream& rStrm);

protected:
	virtual int GetMsgLine (sal_Char *pData, sal_uIntPtr nSize);

public:
	INetMessageIStream (sal_uIntPtr nBufferSize = 2048);
	virtual ~INetMessageIStream (void);

	INetMessage *GetSourceMessage (void) const { return pSourceMsg; }
	void SetSourceMessage (INetMessage *pMsg) { pSourceMsg = pMsg; }

	void GenerateHeader (sal_Bool bGen = sal_True) { bHeaderGenerated = !bGen; }
	sal_Bool IsHeaderGenerated (void) const { return bHeaderGenerated; }
};

/*
 * INetMessageOStream (Message Parser) Interface.
 */
class INetMessageOStream : public INetOStream
{
	INetMessage            *pTargetMsg;
	sal_Bool                    bHeaderParsed;

	INetMessageStreamState  eOState;

	SvMemoryStream         *pMsgBuffer;

	virtual int PutData (const sal_Char *pData, sal_uIntPtr nSize);

	// Not implemented.
	INetMessageOStream (const INetMessageOStream& rStrm);
	INetMessageOStream& operator= (const INetMessageOStream& rStrm);

protected:
	virtual int PutMsgLine (const sal_Char *pData, sal_uIntPtr nSize);

public:
	INetMessageOStream (void);
	virtual ~INetMessageOStream (void);

	INetMessage *GetTargetMessage (void) const { return pTargetMsg; }
	void SetTargetMessage (INetMessage *pMsg) { pTargetMsg = pMsg; }

	void ParseHeader (sal_Bool bParse = sal_True) { bHeaderParsed = !bParse; }
	sal_Bool IsHeaderParsed (void) const { return bHeaderParsed; }
};

/*
 * INetMessageIOStream Interface.
 */
class INetMessageIOStream
	: public INetMessageIStream,
	  public INetMessageOStream
{
	// Not implemented.
	INetMessageIOStream (const INetMessageIOStream& rStrm);
	INetMessageIOStream& operator= (const INetMessageIOStream& rStrm);

public:
	INetMessageIOStream (sal_uIntPtr nBufferSize = 2048);
	virtual ~INetMessageIOStream (void);
};

/*=========================================================================
 *
 * INetMIMEMessageStream Interface.
 *
 *=======================================================================*/
enum INetMessageEncoding
{
	INETMSG_ENCODING_7BIT,
	INETMSG_ENCODING_8BIT,
	INETMSG_ENCODING_BINARY,
	INETMSG_ENCODING_QUOTED,
	INETMSG_ENCODING_BASE64
};

class TOOLS_DLLPUBLIC INetMIMEMessageStream : public INetMessageIOStream
{
	int                    eState;

	sal_uIntPtr                  nChildIndex;
	INetMIMEMessageStream *pChildStrm;

	INetMessageEncoding    eEncoding;
	INetMessageIStream    *pEncodeStrm;
	INetMessageOStream    *pDecodeStrm;

	SvMemoryStream        *pMsgBuffer;

	static INetMessageEncoding GetMsgEncoding (
		const String& rContentType);

	// Not implemented.
	INetMIMEMessageStream (const INetMIMEMessageStream& rStrm);
	INetMIMEMessageStream& operator= (const INetMIMEMessageStream& rStrm);

protected:
	virtual int GetMsgLine (sal_Char *pData, sal_uIntPtr nSize);
	virtual int PutMsgLine (const sal_Char *pData, sal_uIntPtr nSize);

public:
	INetMIMEMessageStream (sal_uIntPtr nBufferSize = 2048);
	virtual ~INetMIMEMessageStream (void);

    using INetMessageIStream::SetSourceMessage;
	void SetSourceMessage (INetMIMEMessage *pMsg)
	{
		INetMessageIStream::SetSourceMessage ((INetMessage *)pMsg);
	}
	INetMIMEMessage *GetSourceMessage (void) const
	{
		return ((INetMIMEMessage *)INetMessageIStream::GetSourceMessage());
	}

    using INetMessageOStream::SetTargetMessage;
	void SetTargetMessage (INetMIMEMessage *pMsg)
	{
		INetMessageOStream::SetTargetMessage ((INetMessage *)pMsg);
	}
	INetMIMEMessage *GetTargetMessage (void) const
	{
		return ((INetMIMEMessage *)INetMessageOStream::GetTargetMessage());
	}
};

#endif /* !_TOOLS_INETSTRM_HXX */