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# ABSTRACT: Default Directive for Validation Class Field Definitions
package Validation::Class::Directive::Default;
use strict;
use warnings;
use base 'Validation::Class::Directive';
use Validation::Class::Util;
our $VERSION = '7.900058'; # VERSION
has 'mixin'        => 1;
has 'field'        => 1;
has 'multi'        => 1;
has 'dependencies' => sub {{
    normalization  => ['filters', 'readonly'],
    # note: default-values are only handled during normalization now
    # validation   => ['multiples', 'value']
}};
sub normalize {
    my ($self, $proto, $field, $param) = @_;
    # override parameter value if default exists
    if (defined $field->{default} && ! defined $param) {
        my @defaults = isa_arrayref($field->{default}) ?
            @{$field->{default}} : ($field->{default})
        ;
        my $context = $proto->stash->{'normalization.context'};
        my $name    = $field->name;
        foreach my $default (@defaults) {
            $default = $default->($context, $proto) if isa_coderef($default);
        }
        $proto->params->add($name, @defaults == 1 ? $defaults[0] : [@defaults]);
    }
    return $self;
}
1;
__END__
HideShow 67 lines of Pod
=pod
=head1 NAME
Validation::Class::Directive::Default - Default Directive for Validation Class Field Definitions
=head1 VERSION
version 7.900058
=head1 SYNOPSIS
    use Validation::Class::Simple;
    my $rules = Validation::Class::Simple->new(
        fields => {
            access_code  => {
                default => 'demo123'
            }
        }
    );
    # set parameters to be validated
    $rules->params->add($parameters);
    # validate
    unless ($rules->validate) {
        # handle the failures
    }
=head1 DESCRIPTION
Validation::Class::Directive::Default is a core validation class field
directive that holds the value which should be used if no parameter is
supplied.
=over 8
=item * alternative argument: a-coderef-returning-a-default-value
This directive can be passed a single value or a coderef which should return
the value to be used as the default value:
    fields => {
        access_code => {
            default => sub {
                my $self = shift; # this coderef will receive a context object
                return join '::', lc __PACKAGE__, time();
            }
        }
    }
=back
=head1 AUTHOR
Al Newkirk <anewkirk@ana.io>
=head1 COPYRIGHT AND LICENSE
This software is copyright (c) 2011 by Al Newkirk.
This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.
=cut