#! /usr/bin/perl -w
# 
#	$Id$
# Copyright (C) 2002-2003 Jan Kratochvil <short@ucw.cz>
# 
# 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
# (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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA


package PerlMail::Contacts;
use vars qw($VERSION);
$VERSION=do { my @r=(q$Revision$=~/\d+/g); sprintf "%d.".("%03d"x$#r),@r; };
use strict;
#use warnings;


sub new
{
my($class)=@_;
my $self=bless {
		"data"=>[],
		},$class;

	return $self;
}

sub _parse
{
my($self,$data,@headers)=@_;

	my $re=join("(.*?)(\r\n)?",map("\Q[$_]\E\r\n",@headers));
	$re=qr/^$re/s;
	my @r=();
	while (my @items=($data=~/$re/s)) {
		my %h=();
		for my $i (0..$#headers) {
			$h{$headers[$i]}=(!$items[2*$i+1] ? undef : $items[2*$i+0])
			}
		push @r,\%h;
		$data=substr($data,length $&);
		}
	die "Unrecognized data (parsing ".join("/",@headers)."): $data" if $data;
	return @r;
}

sub import
{
my($self,$data)=@_;

	$self=$self->new() if !ref $self;
	push @{$self->{"data"}},map({
			[ $self->_parse($_->{"RECORD"}."\r\n","FIELD","FIELD-NAME","FIELD-DATA","FIELD-END") ];
			} $self->_parse($data,"RECORD","RECORD-END"));
	return (wantarray() ? @{$self->{"data"}} : $self->{"data"});
}

sub _join
{
my($self,$href,@headers)=@_;

	my $trailer=pop @headers;
	return join("",map(("[$_]\r\n".(!defined $href->{$_} ? "" : $href->{$_}."\r\n")),@headers))."[$trailer]\r\n";
}

sub export
{
my($self,$data)=@_;

	$data=$self->{"data"} if !$data;
	return join("",map({
			"[RECORD]\r\n".join("",map({
					$self->_join($_,"FIELD","FIELD-NAME","FIELD-DATA","FIELD-END");
					} @$_))."[RECORD-END]\r\n";
			} @$data));
}

1;