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lib/Algorithm/CheckDigits/M11_004.pm  view on Meta::CPAN

package Algorithm::CheckDigits::M11_004;

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

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

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 ($number =~ /^([-\d.]+)(\d\d)$/) {
		return $2 eq $self->_compute_checkdigit($1);
	}
	return ''
} # is_valid()

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

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

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

sub _compute_checkdigit {
	my $self   = shift;
	my $number = shift;
	my ($cd1,$cd2) = ('','');

	my $calc_cd = sub {
		my $number = shift;
		my $weight = shift;
		my @digits = split(//,$number);
		my $sum    = 0;
		for (my $i = 0; $i <= $#digits; $i++) {
			$sum += $weight * $digits[$i];
			--$weight;
		};
		$sum %= 11;
		return 0 if (2 > $sum);
		return 11 - $sum;
	};

	return -1 unless ($number =~ /^[-\d.]+$/);

	$number =~ s/[-.]//g;
	if ('cpf' eq $self->{type}) {