File Coverage

blib/lib/Algorithm/CheckDigits/M10_009.pm

Criterion	Covered	Total	%
statement	47	52	90.3
branch	9	16	56.2
condition	3	6	50.0
subroutine	11	11	100.0
pod	4	5	80.0
total	74	90	82.2

package Algorithm::CheckDigits::M10_009;

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

use version; our $VERSION = 'v1.3.5';

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

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 ($number =~ /^([0-9 ]*)([0-9])$/) {
		my $cd = $self->_compute_checkdigit($1);
		return ($2 == $cd || $2 == ((5 + $cd) % 10));
	}
	return ''
} # is_valid()

sub complete {
	my ($self,$number) = @_;
	if ($number =~ /^[0-9 ]*$/) {
		return  $number . $self->_compute_checkdigit($number);
	}
	return '';
} # complete()

sub basenumber {
	my ($self,$number) = @_;
	if ($number =~ /^([0-9 ]*)([0-9])$/) {
		return $1 if ($self->is_valid($number));
	}
	return '';
} # basenumber()

sub checkdigit {
	my ($self,$number) = @_;
	if ($number =~ /^([0-9 ]*)([0-9])$/) {
		return $2 if ($self->is_valid($number));
	}
	return '';
} # checkdigit()

sub _compute_checkdigit {
	my $self   = shift;
	my $number = shift;
	$number =~ s/\s//g;
	if ($number =~ /^([0-9]*)$/) {
		my @digits = split(//,$number);
		my $even = 0;
		my $sum  = 0;
		for (my $i = 0; $i <= $#digits; $i++) {
			if ($even) {
				my $tmp = 2 * $digits[$i];
				$sum += $tmp / 10 + $tmp % 10;
			} else {
				$sum += $digits[$i];
			}
			$even = not $even;
		}
		return $sum % 10;
	}
	return -1;
} # _compute_checkdigit()

# Preloaded methods go here.

1;
__END__