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package HTML::Widget::Constraint::Regex;
use warnings;
use strict;
use base 'HTML::Widget::Constraint';
__PACKAGE__->mk_accessors(qw/regex/);
=head1 NAME
HTML::Widget::Constraint::Regex - Regex Constraint
=head1 SYNOPSIS
my $c = $widget->constraint( 'Regex', 'foo' );
$c->regex(qr/^\w+$/);
=head1 DESCRIPTION
Regex Constraint.
The Regex constraint always allows an C<undef> value or an empty string.
If you don't want this behaviour, also use the
L<HTML::Widget::Constraint::All|All constraint>.
=head1 METHODS
=head2 regex
Arguments: qr/ regex /
=head2 validate
=cut
sub validate {
my ( $self, $value ) = @_;
my $regex = $self->regex || qr/.*/;
return 0 if ( defined $value
&& $value ne ''
&& $value !~ $regex );
return 1;
}
=head1 AUTHOR
Sebastian Riedel, C<sri@oook.de>
=head1 LICENSE
This library is free software, you can redistribute it and/or modify it under
the same terms as Perl itself.
=cut
1;
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