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//
// VMime library (http://www.vmime.org)
// Copyright (C) 2002-2009 Vincent Richard <vincent@vincent-richard.net>
//
// 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 3 of
// the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// 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.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
// Linking this library statically or dynamically with other modules is making
// a combined work based on this library.  Thus, the terms and conditions of
// the GNU General Public License cover the whole combination.
//

#ifndef VMIME_MESSAGEID_HPP_INCLUDED
#define VMIME_MESSAGEID_HPP_INCLUDED


#include "vmime/base.hpp"
#include "vmime/headerFieldValue.hpp"


namespace vmime
{


/** Message identifier (basic type).
  */

class messageId : public headerFieldValue
{
	friend class messageIdSequence;

public:

	messageId();
	messageId(const string& id);
	messageId(const messageId& mid);
	messageId(const string& left, const string& right);

public:

	/** Return the left part of the message identifier.
	  *
	  * @return left part of message identifier
	  */
	const string& getLeft() const;

	/** Set the left part of the message identifier.
	  *
	  * @param left left part of message identifier
	  */
	void setLeft(const string& left);

	/** Return the right part of the message identifier.
	  *
	  * @return right part of message identifier
	  */
	const string& getRight() const;

	/** Set the right part of the message identifier.
	  *
	  * @param right right part of message identifier
	  */
	void setRight(const string& right);


	messageId& operator=(const string& id);

	bool operator==(const messageId& mid) const;
	bool operator!=(const messageId& mid) const;

	/** Generate a random message identifier.
	  *
	  * @return randomly created message identifier
	  */
	static messageId generateId();

	/** Return the message identifier constructed by using
	  * the right part and the left part, separated by
	  * a '@' character.
	  *
	  * @return full message identifier
	  */
	const string getId() const;

	ref <component> clone() const;
	void copyFrom(const component& other);
	messageId& operator=(const messageId& other);

	const std::vector <ref <const component> > getChildComponents() const;

private:

	string m_left;
	string m_right;

public:

	using component::parse;
	using component::generate;

	// Component parsing & assembling
	void parse(const string& buffer, const string::size_type position, const string::size_type end, string::size_type* newPosition = NULL);
	void generate(utility::outputStream& os, const string::size_type maxLineLength = lineLengthLimits::infinite, const string::size_type curLinePos = 0, string::size_type* newLinePos = NULL) const;

protected:

	/** Parse a message-id from an input buffer.
	  *
	  * @param buffer input buffer
	  * @param position position in the input buffer
	  * @param end end position in the input buffer
	  * @param newPosition will receive the new position in the input buffer
	  * @return a new message-id object, or null if no more message-id can be parsed from the input buffer
	  */
	static ref <messageId> parseNext(const string& buffer, const string::size_type position, const string::size_type end, string::size_type* newPosition);
};


} // vmime


#endif // VMIME_MESSAGEID_HPP_INCLUDED