// Copyright (C) 2001-2005 Open Source Telecom Corporation.
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
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// 
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// 
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
// 
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// templates or use macros or inline functions from this file, or you compile
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// file does not by itself cause the resulting executable to be covered by
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// invalidate any other reasons why the executable file might be covered by
// the GNU General Public License.    
//
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// Common C++.  If you copy code from other releases into a copy of GNU
// Common C++, as the General Public License permits, the exception does
// not apply to the code that you add in this way.  To avoid misleading
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// whether to permit this exception to apply to your modifications.
// If you do not wish that, delete this exception notice.
//

/**
 * @file mime.h
 * @short MIME document abstractions.
 **/

#ifndef	CCXX_MIME_H_
#define	CCXX_MIME_H_

#ifndef CCXX_CONFIG_H_
#include <cc++/config.h>
#endif

#ifndef CCXX_SOCKET_H_
#include <cc++/socket.h>
#endif

#ifdef	CCXX_NAMESPACES
namespace ost {
#endif

class __EXPORT MIMEMultipart;
class __EXPORT MIMEItemPart;

/**
 * A container class for multi-part MIME document objects which can
 * be streamed to a std::ostream destination.
 *
 * @author David Sugar <dyfet@ostel.com>
 * @short container for streamable multi-part MIME documents.
 */
class __EXPORT MIMEMultipart
{
protected:
	friend class __EXPORT MIMEItemPart;
	char boundry[8];
	char mtype[80];
	char *header[16];
	MIMEItemPart *first, *last;

public:
	/**
	 * Contruct a multi-part document, and describe it's type.
	 *
	 * @param document (content) type.
	 */
	MIMEMultipart(const char *mt);

	/**
	 * Stream the headers of the multi-part document.  The headers
	 * of individual entities are streamed as part of the body.
	 *
	 * @param output to stream into.
	 */
	virtual void head(std::ostream *out);

	/**
	 * Stream the "body" of the multi-part document.  This involves
	 * streaming the headers and body of each document part.
	 *
	 * @param output to stream info.
	 */
	virtual void body(std::ostream *out);

	/**
	 * Get a string array of the headers to use.  This is used to
	 * assist URLStream::post.
 	 *
	 * @return array of headers.
	 */
	char **getHeaders(void)
		{return header;};
};

/**
 * The Multipart form is a MIME multipart document specific for the
 * construction and delivery of form data to a web server through a
 * post method.
 *
 * @author David Sugar <dyfet@ostel.com>
 * @short deliver form results as multipart document.
 */
class __EXPORT MIMEMultipartForm : public MIMEMultipart
{
public:
	/**
	 * Construct a form result.  This is a MIMEMultipart of type
	 * multipart/form-data.
	 */
	MIMEMultipartForm();
};

/**
 * This is used to attach an item part to a MIME multipart document
 * that is being streamed.  The base item part class is used by all
 * derived items.
 *
 * @author David Sugar <dyfet@ostel.com>
 * @short item or part of a multi-part object.
 */
class __EXPORT MIMEItemPart
{
protected:
	friend class __EXPORT MIMEMultipart;

	MIMEMultipart *base;
	MIMEItemPart *next;
	const char *ctype;

	/**
	 * Stream the header(s) for the current document part.
	 *
	 * @param output to stream into.
	 */	
	virtual void head(std::ostream *out);

	/**
	 * Stream the content of this document part.
	 *
	 * @param output to stream into.
	 */
	virtual void body(std::ostream *out) = 0;

	/**
	 * Construct and attach a document part to a multipart document.
	 *
	 * @param multipart document to attach to.
	 * @param Content-Type to use.
	 */
	MIMEItemPart(MIMEMultipart *top, const char *ct);
};

/**
 * This is a document part type for use in submitting multipart form
 * data to a web server.
 *
 * @author David Sugar <dyfet@ostel.com>
 * @short multipart document part for web form data field.
 */
class __EXPORT MIMEFormData : public MIMEItemPart
{
protected:
	const char *content;
	const char *name;

public:
	/**
	 * Stream header, Content-Disposition form-data.
	 *
	 * @param output to stream to.
	 */
	void head(std::ostream *out);

	/**
	 * Stream content (value) of this form data field.
	 *
	 * @param output to stream to.
	 */
	void body(std::ostream *out);

	/**
	 * Construct form data field part of multipart form.
	 *
	 * @param multipart form this is part of
	 * @param name of form data field
	 * @param value of form data field
	 */
	MIMEFormData(MIMEMultipartForm *top, const char *name, const char *content);
};
	
#ifdef	CCXX_NAMESPACES
}
#endif

#endif
/** EMACS **
 * Local variables:
 * mode: c++
 * c-basic-offset: 8
 * End:
 */
