/****************************************************************
 * 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.                                           *
 ****************************************************************/


/**
 * RFC2822 address list parser.
 *
 * Created 9/17/2004
 * by Joe Cheng <code@joecheng.com>
 */

options {
	STATIC=false;
	LOOKAHEAD=1;
	VISITOR=true;
	MULTI=true;
	NODE_SCOPE_HOOK=true;
	NODE_EXTENDS="org.apache.james.mime4j.field.address.parser.BaseNode"; 
	//DEBUG_PARSER=true;
	//DEBUG_TOKEN_MANAGER=true;
}

PARSER_BEGIN(AddressListParser)
/****************************************************************
 * 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.                                           *
 ****************************************************************/
package org.apache.james.mime4j.field.address.parser;

public class AddressListParser {
    public static void main(String args[]) throws ParseException {
		while (true) {
		    try {
				AddressListParser parser = new AddressListParser(System.in);
		    	parser.parseLine();
		    	((SimpleNode)parser.jjtree.rootNode()).dump("> ");
		    } catch (Exception x) {
				x.printStackTrace();
				return;
		    }
		}
    }
    
    private static void log(String msg) {
    	System.out.print(msg);
    }
    
    public ASTaddress_list parse() throws ParseException {
        try {
    	    parseAll();
    	    return (ASTaddress_list)jjtree.rootNode();
    	} catch (TokenMgrError tme) {
    	    throw new ParseException(tme.getMessage());
    	}
    }
    
    
    void jjtreeOpenNodeScope(Node n) {
    	((SimpleNode)n).firstToken = getToken(1);
    }
    
    void jjtreeCloseNodeScope(Node n) {
    	((SimpleNode)n).lastToken = getToken(0);
    }
}

PARSER_END(AddressListParser)

void parseLine() #void :
{}
{
	address_list() ["\r"] "\n"
}

void parseAll() #void :
{}
{
	address_list() <EOF>
}

void address_list() :
{}
{
	[ address() ]
	(
		","
		[ address() ]
	)*
}

void address() :
{}
{
	LOOKAHEAD(2147483647)
	addr_spec()
|	angle_addr()
|	( phrase() (group_body() | angle_addr()) )
}

void mailbox() :
{}
{
	LOOKAHEAD(2147483647)
	addr_spec()
|	angle_addr()
|	name_addr()
}

void name_addr() :
{}
{
	phrase() angle_addr()
}

void group_body() :
{}
{
	":"
	[ mailbox() ]
	(
		","
		[ mailbox() ]
	)*
	";"
}

void angle_addr() :
{}
{
	"<" [ route() ] addr_spec() ">"
}

void route() :
{}
{
	"@" domain() ( (",")* "@" domain() )* ":"
}

void phrase() :
{}
{
(	<DOTATOM>
|	<QUOTEDSTRING>
)+
}

void addr_spec() :
{}
{
	( local_part() "@" domain() )
}

void local_part() :
{ Token t; }
{
	( t=<DOTATOM> | t=<QUOTEDSTRING> )
	(	[t="."]
		{
			if ( t.kind == AddressListParserConstants.QUOTEDSTRING || t.image.charAt(t.image.length() - 1) != '.')
				throw new ParseException("Words in local part must be separated by '.'");
		}
		(	t=<DOTATOM> | t=<QUOTEDSTRING> )
	)*
}

void domain() :
{ Token t; }
{
	(	t=<DOTATOM>
		(	[t="."]
			{
				if (t.image.charAt(t.image.length() - 1) != '.')
					throw new ParseException("Atoms in domain names must be separated by '.'");
			}
			t=<DOTATOM>
		)*
	)
|	<DOMAINLITERAL>
}

SPECIAL_TOKEN :
{
 	< WS: ( [" ", "\t"] )+ >
}

TOKEN :
{
	< #ALPHA: ["a" - "z", "A" - "Z"] >
|	< #DIGIT: ["0" - "9"] >
|	< #ATEXT: ( <ALPHA> | <DIGIT>
			  | "!" | "#" | "$" | "%"
			  | "&" | "'" | "*" | "+"
			  | "-" | "/" | "=" | "?"
			  | "^" | "_" | "`" | "{"
			  | "|" | "}" | "~"
			  )>
|	< DOTATOM: <ATEXT> ( <ATEXT> | "." )* >
}

TOKEN_MGR_DECLS :
{
	// Keeps track of how many levels of comment nesting
	// we've encountered.  This is only used when the 2nd
	// level is reached, for example ((this)), not (this).
	// This is because the outermost level must be treated
	// specially anyway, because the outermost ")" has a 
	// different token type than inner ")" instances.
	static int commentNest;
}

MORE :
{
	// domain literal
	"[" : INDOMAINLITERAL
}

<INDOMAINLITERAL>
MORE :
{
	< <QUOTEDPAIR>> { image.deleteCharAt(image.length() - 2); }
|	< ~["[", "]", "\\"] >
}

<INDOMAINLITERAL>
TOKEN :
{
	< DOMAINLITERAL: "]" > { matchedToken.image = image.toString(); }: DEFAULT
}

MORE :
{
	// starts a comment
	"(" : INCOMMENT
}

<INCOMMENT>
SKIP :
{
	// ends a comment
	< COMMENT: ")" > : DEFAULT
	// if this is ever changed to not be a SKIP, need
	// to make sure matchedToken.token = token.toString()
	// is called.
}

<INCOMMENT>
MORE :
{
	< <QUOTEDPAIR>> { image.deleteCharAt(image.length() - 2); }
|	"(" { commentNest = 1; } : NESTED_COMMENT
|	< <ANY>>
}

<NESTED_COMMENT>
MORE :
{
	< <QUOTEDPAIR>> { image.deleteCharAt(image.length() - 2); }
|	"(" { ++commentNest; }
|	")" { --commentNest; if (commentNest == 0) SwitchTo(INCOMMENT); }
|	< <ANY>>
}


// QUOTED STRINGS

MORE :
{
	"\"" { image.deleteCharAt(image.length() - 1); } : INQUOTEDSTRING
}

<INQUOTEDSTRING>
MORE :
{
	< <QUOTEDPAIR>> { image.deleteCharAt(image.length() - 2); }
|	< (~["\"", "\\"])+ >
}

<INQUOTEDSTRING>
TOKEN :
{
	< QUOTEDSTRING: "\"" > { matchedToken.image = image.substring(0, image.length() - 1); } : DEFAULT
}

// GLOBALS

<*>
TOKEN :
{
	< #QUOTEDPAIR: "\\" <ANY> >
|	< #ANY: ~[] >
}

// ERROR!
/*

<*>
TOKEN :
{
	< UNEXPECTED_CHAR: <ANY> >
}

*/