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lib/Algorithm/CheckDigits/M11_006.pm  view on Meta::CPAN

package Algorithm::CheckDigits::M11_006;

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

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

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

my @weight = ( 6, 3, 7, 9, 10, 5, 8, 4, 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 ($number =~ /^(\d{4}-?\d{4})-?(\d\d)-?(\d{10})$/) {
		return uc($2) eq $self->_compute_checkdigits($1,$3);
	}
	return ''
} # is_valid()

sub complete {
	my ($self,$number) = @_;
	if ($number =~ /^(\d{4}-?\d{4})[-\s]+(\d{10})$/) {
		return "$1-"
		     . $self->_compute_checkdigits($1,$2)
		     . "-$2";
	}
	return '';
} # complete()

sub basenumber {
	my ($self,$number) = @_;
	if ($number =~ /^(\d{4}-?\d{4})-?(\d\d)-?(\d{10})$/) {
		return "$1-  -$3" if ($2 eq $self->_compute_checkdigits($1,$3));
	}
	return '';
} # basenumber()

sub checkdigit {
	my ($self,$number) = @_;
	if ($number =~ /^(\d{4}-?\d{4})-?(\d\d)-?(\d{10})$/) {
		return $2 if ($2 eq $self->_compute_checkdigits($1,$3));
	}
	return '';
} # checkdigit()

sub _compute_checkdigits {
	my $self    = shift;
	my $bank    = shift;
	my $account = shift;

	$bank =~ s/-//g;

	my $calc = sub {
		my @digits = split(//,shift);
		my $sum = 0;
		for (my $i = 0; $i <= $#digits; $i++) {
			$sum += $weight[$i] * $digits[$#digits - $i];
		}
		$sum %= 11;
		return $sum ? 11 - $sum : 0;
	};
	my $first  = $calc->($bank);
	my $second = $calc->($account);

	return sprintf("%d%d",$first,$second);
} # _compute_checkdigit()