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lib/Algorithm/CheckDigits/M10_006.pm  view on Meta::CPAN

package Algorithm::CheckDigits::M10_006;

use 5.006;
use strict;
use warnings;
use integer;

use version; our $VERSION = 'v1.3.6';

our @ISA = qw(Algorithm::CheckDigits);

my @weight = ( 2,1,2,5,7,1,2,1,2,1,2,1 );

sub new {
	my $proto = shift;
	my $type  = shift;
	my $class = ref($proto) || $proto;
	my $self  = bless({}, $class);
	$self->{type} = lc($type);
	return $self;
} # new()

sub is_valid {
	my ($self,$number) = @_;
	if ($number =~ /^(\d{8}[A-Za-z]\d\d)(\d)$/) {
		return $2 == $self->_compute_checkdigit($1);
	}
	return ''
} # is_valid()

sub complete {
	my ($self,$number) = @_;
	if ($number =~ /^\d{8}[A-Za-z]\d\d$/) {
		return  $number . $self->_compute_checkdigit($number);
	}
	return '';
} # complete()

sub basenumber {
	my ($self,$number) = @_;
	if ($number =~ /^(\d{8}[A-Za-z]\d\d)(\d)$/) {
		return $1 if ($2 == $self->_compute_checkdigit($1));
	}
	return '';
} # basenumber()

sub checkdigit {
	my ($self,$number) = @_;
	if ($number =~ /^(\d{8}[A-Za-z]\d\d)(\d)$/) {
		return $2 if ($2 == $self->_compute_checkdigit($1));
	}
	return '';
} # checkdigit()

sub _compute_checkdigit {
	my $self   = shift;
	my $number = shift;

	if ($number =~ /^(\d{8})([A-Za-z])(\d\d)$/) {

		my $lv     = sprintf("%2.2d",ord(uc($2)) - ord('A') + 1);
		my @digits = split(//,"$1$lv$3");
		my $sum    = 0;

		for (my $i = 0; $i <= $#digits; $i++) {

			my $tmp = $weight[$i] * $digits[$i];

			$sum += $tmp / 10;
			$sum += $tmp % 10
		}
		return $sum % 10;
	}
	return -1;
} # _compute_checkdigit()

# Preloaded methods go here.