package HTML::FormHandler::Widget::Field::CheckboxGroup;
# ABSTRACT: checkbox group field role

use Moose::Role;
use namespace::autoclean;
use HTML::FormHandler::Render::Util ('process_attrs');


sub render {
    my ( $self, $result ) = @_;
    $result ||= $self->result;
    die "No result for form field '" . $self->full_name . "'. Field may be inactive." unless $result;
    my $output = $self->render_element( $result );
    return $self->wrap_field( $result, $output );
}

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


    # loop through options
    my $output = '';
    foreach my $option ( @{ $self->{options} } ) {
        if ( my $label = $option->{group} ) {
            $label = $self->_localize( $label ) if $self->localize_labels;
            my $attr = $option->{attributes} || {};
            my $attr_str = process_attrs($attr);
            my $lattr = $option->{label_attributes} || {};
            my $lattr_str= process_attrs($lattr);
            $output .= qq{\n<div$attr_str><label$lattr_str>$label</label>};
            foreach my $group_opt ( @{ $option->{options} } ) {
                $output .= $self->render_option( $group_opt, $result );
            }
            $output .= qq{\n</div>};
        }
        else {
            $output .= $self->render_option( $option, $result );
        }
    }
    $self->reset_options_index;
    return $output;
}

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

    # get existing values
    my $fif = $result->fif;
    my %fif_lookup;
    @fif_lookup{@$fif} = () if $self->multiple;

    # create option label attributes
    my $lattr = $option->{label_attributes} || {};
    push @{ $lattr->{class} }, 'checkbox';
    if ( $self->get_tag('inline') ) {
        my $class = 'inline';
        $class = 'checkbox-inline' if $self->has_flag('is_b3');
        push @{ $lattr->{class} }, $class;
    }
    my $lattr_str = process_attrs( $lattr );
    my $id = $self->id . '.' . $self->options_index;
    my $output .= qq{\n<label$lattr_str for="$id">};
    my $value = $option->{value};
    $output .= qq{\n<input type="checkbox"};
    $output .= qq{ value="} . $self->html_filter($value) . '"';
    $output .= qq{ name="} . $self->html_name . '"';
    $output .= qq{ id="$id"};

    # handle option attributes
    my $attr = $option->{attributes} || {};
    if( defined $option->{disabled} && $option->{disabled} ) {
        $attr->{disabled} = 'disabled';
    }
    if ( defined $fif &&
         ( ( $self->multiple && exists $fif_lookup{$value} ) ||
             ( $fif eq $value ) ) ) {
        $attr->{checked} = 'checked';
    }
    $output .= process_attrs($attr);
    $output .= " />\n";

    # handle label
    my $label = $option->{label};
    $label = $self->_localize($label) if $self->localize_labels;
    $output .= $self->html_filter($label);
    $output .= "\n</label>";
    $self->inc_options_index;

    if ($self->get_tag('checkbox_element_wrapper')) {
        $output = qq{<div class="checkbox">$output</div>};
    }
    return $output;
}

1;

__END__

=pod

=encoding UTF-8

=head1 NAME

HTML::FormHandler::Widget::Field::CheckboxGroup - checkbox group field role

=head1 VERSION

version 0.40064

=head1 SYNOPSIS

Checkbox group widget for rendering multiple selects.

Checkbox element label class is 'checkbox', plus 'inline'
if the 'inline' tag is set.

Options hashrefs must have the keys 'value', and 'label'.
They may have an 'attributes' hashref key. The 'checked'
attribute should not be set in the options hashref. It should
be set by supplying a default value or from params input.

See L<HTML::FormHandler::Field::Select> for documentation on
select fields and options.

=head1 AUTHOR

FormHandler Contributors - see HTML::FormHandler

=head1 COPYRIGHT AND LICENSE

This software is copyright (c) 2014 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