package HTML::FormHandler::Field::AddElement;
# ABSTRACT: Field to support repeatable javascript add
$HTML::FormHandler::Field::AddElement::VERSION = '0.40068';
use HTML::FormHandler::Moose;
extends 'HTML::FormHandler::Field::Display';
use HTML::FormHandler::Render::Util ('process_attrs');


has 'repeatable' => ( is => 'rw', isa => 'Str', required => 1 );
has '+do_wrapper' => ( default => 1 );
has '+value'  => ( default => 'Add Element' );

sub build_render_method {
    return sub {
        my ( $self, $result ) = @_;
        $result ||= $self->result;

        my $rep_field = $self->parent->field($self->repeatable);
        die "Invalid repeatable name in field " . $self->name unless $rep_field;
        my $value = $self->html_filter($self->_localize($self->value));
        my $attrs = $self->element_attributes($result);
        push @{$attrs->{class}}, ( 'add_element', 'btn' );
        $attrs->{'data-rep-id'} = $rep_field->id;
        $attrs->{id} = $self->id;
        my $attr_str = process_attrs($attrs);
        my $wrapper_tag = $self->get_tag('wrapper_tag') || 'div';
        my $output = qq{<$wrapper_tag$attr_str>$value</$wrapper_tag>};
        $output = $self->wrap_field($self->result, $output);
        return $output;
    };
}

1;

__END__

=pod

=encoding UTF-8

=head1 NAME

HTML::FormHandler::Field::AddElement - Field to support repeatable javascript add

=head1 VERSION

version 0.40068

=head1 SYNOPSIS

EXAMPLE field for rendering an AddElement field for
doing javascript additions of repeatable elements.

You probably want to make your own.

The main requirements are that the button have 1) the
'add_element' class, 2) a 'data-rep-id' attribute that
contains the id of the repeatable to which you want to
add an element.

=head1 NAME

HTML::FormHandler::Field::AddElement

=head1 ATTRIBUTES

    has_field 'add_element' => ( type => 'AddElement', repeatable => 'foo',
        value => 'Add another foo',
    );

=head2 repeatable

Requires the name of a Repeatable sibling field.

=head2 value

The value of the button that's rendered, 'Add Element' by default.

=head1 AUTHOR

FormHandler Contributors - see HTML::FormHandler

=head1 COPYRIGHT AND LICENSE

This software is copyright (c) 2017 by Gerda Shank.

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