# Blosxom Plugin: date_roman
# Author(s): Thomas Meehan <meehans@mooserve.freeserve.co.uk>
# Version: 0.1

# BASED HEAVILY ON
# Blosxom Plugin: date_fullname
# Author(s): Rael Dornfest <rael@oreilly.com>
# and Tamara Crowe <tamara@darkglass.org>
# Version: 2.0b4


package date_roman;

# --- Configurable variables -----

$caps=1;	# 0 = in lower case except for month names (e.g. Ian., Feb., Mart., etc.)
		# 1 = all upper case: more authentic but looks like SHOUTING

# --------------------------------


sub date {
$da_roman; # use $date_roman::da_roman to produce a date using the Roman calendar and Roman version of the Christian year
my ($pkg, $path, $date_ref, $mtime, @date_bits) = @_;
my ($theda, $themo, $theyr)=($date_bits[3], $date_bits[2], $date_bits[5]);
if ($theyr%4==0 && !($theyr%100==0 && $theyr%400!=0)) {$leap=1;}
my @months= (
	"",
	{ # JAN [1] see also 13
		abbr	=> "Ian.",
		nones => 5,
		ides 	=> 13,
		days	=> 31 
	},
	{ # FEB [2]
		abbr	=> "Feb.",
		nones => 5,
		ides 	=> 13,
		days	=> 28 
	},
	{ # MAR [3]
		abbr	=> "Mart.",
		nones => 7,
		ides 	=> 15,
		days	=> 31 
	},
	{ # APR [4]
		abbr	=> "Apr.",
		nones => 5,
		ides 	=> 13,
		days	=> 30 
	},
	{ # MAY [5]
		abbr	=> "Mai.",
		nones => 7,
		ides 	=> 15,
		days	=> 31 
	},
	{ # JUN [6]
		abbr	=> "Iun.",
		nones => 5,
		ides 	=> 13,
		days	=> 30 
	},
	{ # JUL [7]
		abbr	=> "Iul.",
		nones => 7,
		ides 	=> 15,
		days	=> 31 
	},
	{ # AUG [8]
		abbr	=> "Aug.",
		nones => 5,
		ides 	=> 13,
		days	=> 31 
	},
	{ # SEP [9]
		abbr	=> "Sept.",
		nones => 5,
		ides 	=> 13,
		days	=> 30 
	},
	{ # OCT [10]
		abbr	=> "Oct.",
		nones => 7,
		ides 	=> 15,
		days	=> 31 
	},
	{ # NOV [11]
		abbr	=> "Nov.",
		nones => 5,
		ides 	=> 13,
		days	=> 30 
	},
	{ # DEC [12]
		abbr	=> "Dec.",
		nones => 5,
		ides 	=> 13,
		days	=> 31 
	},
	{ # JAN [13] copy of 1 to allow calculations of Kalends from 12
		abbr	=> "Ian.",
		nones => 5,
		ides 	=> 13,
		days	=> 31 
	}
);


sub start {
  1;
}

sub convertdigit {	## @_ = digit, x, l, c
	my $digit;
	if ($_[0]<4) 		{$digit=	$_[1] x $_[0]			;}
	elsif ($_[0]==4) 	{$digit=	$_[1].$_[2]			;}
	elsif ($_[0]==5) 	{$digit=	$_[2]				;}
	elsif ($_[0]<9)	{$digit=	$_[2].$_[1] x ($_[0]-5)	;}
	else 			{$digit=	$_[1].$_[3]			;}
	return $digit;
}

sub arabictoroman {	## @_ = 2004
	my $roman;
	my $arabic=$_[0];
	while (length($arabic)<4) {
		$arabic="0".$arabic;
	}
	for ($k=0; $k<4; $k++) {
		if ($k==3) {$a="i"; $b="v"; $c="x";}
		if ($k==2) {$a="x"; $b="l"; $c="c";}
		if ($k==1) {$a="c"; $b="d"; $c="m";}
		if ($k==0) {$a="m"; $b=""; $c="";}
		$d=substr ($arabic,$k,1);
		$roman.=convertdigit($d, $a, $b, $c);
	}
	return $roman;
}

sub kalends {
	my $dat=$_[0];
	my $mon=$_[1];
	my $year=arabictoroman($_[2]);
	if ($_[3] && $mon==2 && $dat>24) {
		$months[$mon]{'days'}=29;
	}

	##SHORTCUTS

	my $abbr=	$months[$mon]{'abbr'};
	my $nones=	$months[$mon]{'nones'};
	my $ides=	$months[$mon]{'ides'};
	my $days=	$months[$mon]{'days'};

	my $nonescount=		$nones-$dat+1;
	my $idescount=		$ides-$dat+1;
	my $kalendscount=	$days-$dat+2;
	my $monext=		$months[$mon+1]{'abbr'};

	my $romandate;

	if    ($dat==1) 		{$romandate="kal. $abbr $year";}
	elsif ($dat<$nones-1) 		{$romandate="a.d. ".arabictoroman($nonescount)." non. $abbr $year";}
	elsif ($dat==$nones-1) 		{$romandate="prid. non. $abbr $year";}
	elsif ($dat==$nones)		{$romandate="non. $abbr $year";}
	elsif ($dat<$ides-1)		{$romandate="a.d. ".arabictoroman($idescount)." id. $abbr $year";}
	elsif ($dat==$ides-1)		{$romandate="prid. id. $abbr $year";}
	elsif ($dat==$ides)		{$romandate="id. $abbr $year";}
	elsif ($dat==25 && $days==29)	{$romandate="a.d. bis vi kal. mart.";}
	elsif ($dat<$days)		{$romandate="a.d. ".arabictoroman($kalendscount)." kal. $monext $year";}
	else				{$romandate="prid. kal. $monext $year";}

	if ($_[4]) {$romandate=uc($romandate);} # CAPITALS

	return $romandate;
}
$da_roman=kalends ($theda,$themo,$theyr,$leap,$caps); # DATE, MONTH, YEAR, LEAPYEAR, CAPITALS

1;

}

1;

__END__

=head1 NAME

Blosxom Plug-in: date_roman

=head1 SYNOPSIS

Purpose: Populates $date_numbers::da_short (day of the month) and 
$date_numbers::da_ord (day of the month) with short numbers (without leading zeros) and ordinal numbers (1st, 2nd, etc.) respectively.

=head1 VERSION

1

=head1 AUTHOR

Thomas Meehan (meehans@mooserve.freeserve.co.uk)

=head1 SEE ALSO

Blosxom Home/Docs/Licensing: http://www.raelity.org/apps/blosxom/

Blosxom Plugin Docs: http://www.raelity.org/apps/blosxom/plugin.shtml

=head1 BUGS

Address bug reports and comments to the Blosxom mailing list 
[http://www.yahoogroups.com/group/blosxom].

=head1 LICENSE

Blosxom
Copyright 2003, Rael Dornfest

This Blosxom Plug-in
Copyright 2004, Thomas Meehan 

Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the "Software"),
to deal in the Software without restriction, including without limitation
the rights to use, copy, modify, merge, publish, distribute, sublicense,
and/or sell copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included
in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.