/
FormFieldsFromJSON.pm
2289 lines (1657 loc) · 53.9 KB
/
FormFieldsFromJSON.pm
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package Mojolicious::Plugin::FormFieldsFromJSON;
use Mojo::Base 'Mojolicious::Plugin';
# ABSTRACT: create form fields based on a definition in a JSON file
our $VERSION = '1.01';
use Carp;
use File::Basename;
use File::Spec;
use IO::Dir;
use List::Util qw(first);
use Mojo::Asset::File;
use Mojo::Collection;
use Mojo::ByteStream;
use Mojo::File;
use Mojo::JSON qw(decode_json);
use Mojolicious ();
has dir => sub { ["."] };
my $selected_value = Mojolicious->VERSION < 6.16 ? 'selected' : undef;
my $checked_value = Mojolicious->VERSION < 6.16 ? 'checked' : undef;
sub register {
my ( $self, $app, $config ) = @_;
$config //= {};
if ( $config->{template_file} ) {
$config->{template} = Mojo::File->new( $app->home, 'templates', $config->{template_file} )->slurp;
$config->{template} //= $app->renderer->get_data_template( $config->{template_file} );
}
my %configs;
if ( ref $config->{dir} eq "ARRAY" ) {
@{ $self->dir } = @{ $config->{dir} };
}
else {
@{ $self->dir } = ( $config->{dir} );
}
my %valid_types = (
%{ $config->{types} || {} },
text => 1,
checkbox => 1,
select => 1,
radio => 1,
hidden => 1,
textarea => 1,
password => 1,
);
my %configfiles;
$app->helper(
forms => sub {
if (%configfiles) {
my @sorted_configfiles = sort keys %configfiles;
return @sorted_configfiles;
}
for my $dir ( @{ $self->dir } ) {
my $dir = IO::Dir->new($dir);
FILE:
while ( my $file = $dir->read ) {
next FILE if $file !~ m{\.json\z};
my $filename = basename $file;
$filename =~ s{\.json\z}{};
$configfiles{$filename} = 1;
}
}
my @sorted_configfiles = sort keys %configfiles;
return @sorted_configfiles;
}
);
$app->helper( "form_fields_from_json_dir" => sub { return $self->dir } );
$app->helper(
fields => sub {
my ( $c, $file, $params ) = @_;
if ( !$configs{$file} ) {
$self->_load_config_from_file( $c, \%configs, $file );
}
my @fields;
my @fields_long;
for my $field ( @{ $configs{$file} } ) {
my $name = $field->{label} // $field->{name} // '';
push @fields, $name;
push @fields_long, +{ label => $name, name => $field->{name} // '' };
}
if ( $params and $params->{hash} ) {
return @fields_long;
}
return @fields;
}
);
$app->helper(
'validate_form_fields' => sub {
my ( $c, $file ) = @_;
return '' if !$file;
if ( !$configs{$file} ) {
$self->_load_config_from_file( $c, \%configs, $file );
}
return '' if !$configs{$file};
my $config = $configs{$file};
my $validation = $c->validation;
my $params_hash = $c->req->params->to_hash;
my @param_names = keys %{ $params_hash || {} };
my %params = map { $_ => $c->every_param($_) } @param_names;
$validation->input( \%params );
my %errors;
FIELD:
for my $field ( @{$config} ) {
if ( 'HASH' ne ref $field ) {
$app->log->error('Field definition must be a HASH - skipping field');
next FIELD;
}
if ( !$field->{validation} ) {
next FIELD;
}
if ( 'HASH' ne ref $field->{validation} ) {
$app->log->warn('Validation settings must be a HASH - skipping field');
next FIELD;
}
my $name = $field->{name} // $field->{label} // '';
my $global_error = 1;
if ( $field->{validation}->{required} ) {
$validation->required($name);
my $value = $field->{validation}->{required};
if ( ref $value && 'HASH' eq ref $value ) {
$global_error = $value->{msg} // 1;
}
}
else {
$validation->optional($name);
}
RULE:
for my $rule ( sort keys %{ $field->{validation} } ) {
last RULE if !defined $params{$name};
next RULE if $rule eq 'required';
my $value = $field->{validation}->{$rule};
my $ref = ref $value;
my $method = $rule;
my $error = 1;
my @params;
if ( !$ref ) {
@params = $value;
}
elsif ( $ref eq 'ARRAY' ) {
@params = @{$value};
}
elsif ( $ref eq 'HASH' ) {
@params = ref $value->{args} ? @{ $value->{args} } : $value->{args};
$error = $value->{msg} // 1;
}
eval {
$validation->check( $method, @params );
1;
} or do {
$app->log->error("Validating $name with rule $method failed: $@");
};
if ( $validation->has_error($name) ) {
$errors{$name} = $error;
last RULE;
}
}
if ( $validation->has_error($name) && !defined $errors{$name} ) {
$errors{$name} = $global_error;
}
}
return %errors;
}
);
$app->helper(
'form_fields' => sub {
my ( $c, $file, %params ) = @_;
# get form config
return '' if !$self->_load_config_from_file( $c, \%configs, $file );
return '' if !$configs{$file} && !ref $file;
my $field_config = $configs{$file} || $file;
my @fields;
my %fields_to_show = map { $_ => 1 } @{ $params{fields} || [] };
FIELD:
for my $field ( @{$field_config} ) {
next FIELD if %fields_to_show && !$fields_to_show{ $field->{name} };
my $field_content = $self->_build_form_field( $c, $field, \%params, $config, \%valid_types );
if ( length $field_content ) {
push @fields, $field_content;
}
}
return Mojo::ByteStream->new( join "\n\n", @fields );
}
);
$app->helper(
'form_field_by_name' => sub {
my ( $c, $file, $field_name, %params ) = @_;
# get form config
return '' if !$self->_load_config_from_file( $c, \%configs, $file );
return '' if !$configs{$file} && !ref $file;
my $field_config = $configs{$file} || $file;
# find field config
my @fields_filtered = grep { $_->{name} eq $field_name } @{$field_config};
return '' if !( scalar @fields_filtered );
return $self->_build_form_field( $c, $fields_filtered[0], \%params, $config, \%valid_types );
}
);
return 1;
}
sub _load_config_from_file {
my ( $self, $c, $configs, $file ) = @_;
return 0 if !$file;
if ( !$configs->{$file} && !ref $file ) {
my $path;
# search until first match
my $i = 0;
do {
my $_path = File::Spec->catfile( $self->dir->[$i], $file . '.json' );
$path = $_path if -r $_path;
} while ( not defined $path and ++$i <= $#{ $self->dir } );
if ( not defined $path ) {
$c->app->log->error("FORMFIELDS $file: not found in directories");
$c->app->log->error(" $_") for @{ $self->dir };
return 0;
}
eval {
my $content = Mojo::Asset::File->new( path => $path )->slurp;
$configs->{$file} = decode_json $content;
} or do {
$c->app->log->error("FORMFIELDS $file: $@");
return 0;
};
if ( 'ARRAY' ne ref $configs->{$file} ) {
$c->app->log->error('Definition JSON must be an ARRAY');
return 0;
}
}
return 1;
}
sub _build_form_field {
my ( $self, $c, $field, $params, $plugin_config, $valid_types ) = @_;
if ( 'HASH' ne ref $field ) {
$c->app->log->error('Field definition must be an HASH - skipping field');
return '';
}
my $type = lc $field->{type};
my $orig_type = $type;
if ( $plugin_config->{alias} && $plugin_config->{alias}->{$type} ) {
$type = $plugin_config->{alias}->{$type};
}
if ( !$valid_types->{$type} ) {
$c->app->log->warn("Invalid field type $type - falling back to 'text'");
$type = 'text';
}
if ( $plugin_config->{global_attributes}
&& $type ne 'hidden'
&& 'HASH' eq ref $plugin_config->{global_attributes} )
{
ATTRIBUTE:
for my $attribute ( keys %{ $plugin_config->{global_attributes} } ) {
$field->{attributes}->{$attribute} //= '';
my $field_attr = $field->{attributes}->{$attribute};
my $global_attr = $plugin_config->{global_attributes}->{$attribute};
next ATTRIBUTE if $field_attr =~ m{\Q$global_attr};
my $space = length $field_attr ? ' ' : '';
$field->{attributes}->{$attribute} .= $space . $global_attr;
}
}
if ( $field->{translate_sublabels}
&& $plugin_config->{translation_method}
&& !$field->{translation_method} )
{
$field->{translation_method} = $plugin_config->{translation_method};
}
my $sub = $self->can( '_' . $type );
my $form_field = $self->$sub( $c, $field, %{$params} );
$form_field = Mojo::ByteStream->new($form_field);
my $template = $field->{template} // $plugin_config->{templates}->{$orig_type}
// $plugin_config->{template};
if ( $template && $type ne 'hidden' ) {
my $label = $field->{label} // '';
my $loc = $plugin_config->{translation_method};
if ( $plugin_config->{translate_labels} && $loc && 'CODE' eq ref $loc ) {
$label = $loc->( $c, $label );
}
$form_field = Mojo::ByteStream->new(
$c->render_to_string(
inline => $template,
id => $field->{id} // $field->{name} // $field->{label} // '',
label => $label,
field => $form_field,
message => $field->{msg} // '',
info => $field->{info} // '',
)
);
# $c->app->log->debug("rendered formfield: ".$form_field);
}
return $form_field;
}
sub _hidden {
my ( $self, $c, $field, %params ) = @_;
my $name = $field->{name} // $field->{label} // '';
my $from_stash_key = $params{from_stash};
my $from_stash =
$from_stash_key
? $c->stash($from_stash_key)->{$name}
: undef;
my $value = $params{$name}->{data} // $from_stash // $c->stash($name) // $c->param($name)
// $field->{data} // '';
my $id = $field->{id} // $name;
my %attrs = %{ $field->{attributes} || {} };
return $c->hidden_field( $name, $value, id => $id, %attrs );
}
sub _text {
my ( $self, $c, $field, %params ) = @_;
my $name = $field->{name} // $field->{label} // '';
my $from_stash_key = $params{from_stash};
my $from_stash =
$from_stash_key
? $c->stash($from_stash_key)->{$name}
: undef;
my $value = $params{$name}->{data} // $from_stash // $c->stash($name) // $c->param($name)
// $field->{data} // '';
my $id = $field->{id} // $name;
my %attrs = %{ $field->{attributes} || {} };
return $c->text_field( $name, $value, id => $id, %attrs );
}
sub _select {
my ( $self, $c, $field, %params ) = @_;
my $name = $field->{name} // $field->{label} // '';
my $from_stash_key = $params{from_stash};
my $from_stash =
$from_stash_key
? $c->stash($from_stash_key)->{$name}
: undef;
my $field_params = $params{$name} || {},
my %select_params = (
disabled => $self->_get_highlighted_values( $field, 'disabled' ),
selected => $self->_get_highlighted_values( $field, 'selected' ),
);
my $stash_values = $c->every_param($name);
if ( scalar( @{ $stash_values || [] } ) == 0 && defined( $c->stash($name) ) ) {
my $local_stash = $c->stash($name);
$stash_values = ref $local_stash ? $local_stash : [$local_stash];
}
if ($from_stash) {
$stash_values = ref $from_stash ? $from_stash : [$from_stash];
}
my $reset;
if ( @{ $stash_values || [] } ) {
$select_params{selected} =
$self->_get_highlighted_values( +{ selected => $stash_values }, 'selected', );
$reset = 1;
}
for my $key (qw/disabled selected/) {
my $hashref = $self->_get_highlighted_values( $field_params, $key );
if ( keys %{$hashref} ) {
$select_params{$key} = $hashref;
}
}
if ( $field_params->{data} ) {
$select_params{data} = $field_params->{data};
}
my @values = $self->_get_select_values( $c, $field, %select_params );
my $id = $field->{id} // $name;
my %attrs = %{ $field->{attributes} || {} };
if ( $field->{multiple} ) {
$attrs{multiple} = 'multiple';
$attrs{size} = $field->{size} || 5;
}
my @selected = keys %{ $select_params{selected} };
if (@selected) {
my $single = scalar @selected;
my $param = $single == 1 ? $selected[0] : \@selected;
$c->param( $name, $param );
}
my $select_field = $c->select_field( $name, [@values], id => $id, %attrs );
# reset parameters
if ($reset) {
my $single = scalar @{$stash_values};
my $param = $single == 1 ? $stash_values->[0] : $stash_values;
$c->param( $name, $param );
}
return $select_field;
}
sub _get_highlighted_values {
my ( $self, $field, $key ) = @_;
return +{} if !$field->{$key};
my %highlighted;
if ( !ref $field->{$key} ) {
my $value = $field->{$key};
$highlighted{$value} = 1;
}
elsif ( 'ARRAY' eq ref $field->{$key} ) {
for my $value ( @{ $field->{$key} } ) {
$highlighted{$value} = 1;
}
}
return \%highlighted;
}
sub _get_select_values {
my ( $self, $c, $field, %params ) = @_;
my $data = $params{data} || $field->{data} || [];
if ( $field->{data_cb} ) {
my @parts = split /::/, $field->{data_cb};
my $subname = pop @parts;
my $class = join '::', @parts;
my $sub = $class->can($subname);
$data = $sub->() if $sub;
}
my @values;
if ( 'ARRAY' eq ref $data ) {
@values = $self->_transform_array_values( $data, %params );
}
elsif ( 'HASH' eq ref $data ) {
@values = $self->_transform_hash_values( $c, $data, %params );
}
return @values;
}
sub _transform_hash_values {
my ( $self, $c, $data, %params ) = @_;
my @values;
my $numeric = 1;
my $counter = 0;
my %mapping;
KEY:
for my $key ( keys %{$data} ) {
if ( ref $data->{$key} ) {
my @group_values = $self->_get_select_values( $c, +{ data => $data->{$key} }, %params );
$values[$counter] = Mojo::Collection->new( $key => \@group_values );
$mapping{$key} = $counter;
}
else {
my %opts;
$opts{disabled} = 'disabled' if $params{disabled}->{$key};
$opts{selected} = $selected_value if $params{selected}->{$key};
#$opts{selected} = undef if $params{selected}->{$key};
$values[$counter] = [ $data->{$key} => $key, %opts ];
$mapping{$key} = $counter;
}
$counter++;
}
if ( first { $_ =~ m{[^0-9]} } keys %mapping ) {
$numeric = 0;
}
my @sorted_keys =
$numeric
? sort { $a <=> $b } keys %mapping
: sort { $a cmp $b } keys %mapping;
my @indexes = @mapping{@sorted_keys};
my @sorted_values = @values[@indexes];
return @sorted_values;
}
sub _transform_array_values {
my ( $self, $data, %params ) = @_;
my @values;
my $numeric = 1;
for my $value ( @{$data} ) {
if ( $numeric && $value =~ m{[^0-9]} ) {
$numeric = 0;
}
my %opts;
$opts{disabled} = 'disabled' if $params{disabled}->{$value};
$opts{selected} = $selected_value if $params{selected}->{$value};
#$opts{selected} = undef if $params{selected}->{$value};
push @values, [ $value => $value, %opts ];
}
@values =
$numeric
? sort { $a->[0] <=> $b->[0] } @values
: sort { $a->[0] cmp $b->[0] } @values;
return @values;
}
sub _radio {
my ( $self, $c, $field, %params ) = @_;
my $name = $field->{name} // $field->{label} // '';
my $id = $field->{id} // $name;
my %attrs = %{ $field->{attributes} || {} };
my $data = $params{$name}->{data} // $field->{data} // [];
my @values = ref $data ? @{$data} : ($data);
my $field_params = $params{$name} || {},
my %select_params = (
disabled => $self->_get_highlighted_values( $field, 'disabled' ),
selected => $self->_get_highlighted_values( $field, 'selected' ),
);
my $stash_values = $c->every_param($name);
if ( scalar( @{ $stash_values || [] } ) == 0 && defined( $c->stash($name) ) ) {
my $local_stash = $c->stash($name);
$stash_values = ref $local_stash ? $local_stash : [$local_stash];
}
my $reset;
if ( @{ $stash_values || [] } ) {
$select_params{selected} =
$self->_get_highlighted_values( +{ selected => $stash_values }, 'selected', );
$reset = 1;
}
for my $key (qw/disabled selected/) {
my $hashref = $self->_get_highlighted_values( $field_params, $key );
if ( keys %{$hashref} ) {
$select_params{$key} = $hashref;
}
}
my @selected = keys %{ $select_params{selected} };
if (@selected) {
my $single = scalar @selected;
my $param = $single == 1 ? $selected[0] : \@selected;
$c->param( $name, $param );
}
my $radiobuttons = '';
for my $radio_value (@values) {
my %value_attributes;
if ( $select_params{disabled}->{$radio_value} ) {
$value_attributes{disabled} = 'disabled';
}
if ( $select_params{selected}->{$radio_value} ) {
$value_attributes{checked} = $checked_value;
}
my $local_label = '';
if ( $field->{show_value} ) {
$local_label = $radio_value;
}
my $loc = $field->{translation_method};
if ( length $local_label && $field->{translate_sublabels} && $loc && 'CODE' eq ref $loc ) {
$local_label = $loc->( $c, $local_label );
}
$local_label = " " . $local_label if length $local_label;
$radiobuttons .= $c->radio_button(
$name => $radio_value,
id => $id,
%attrs,
%value_attributes,
) . "$local_label\n";
if ( defined $field->{after_element} ) {
$radiobuttons .= $field->{after_element};
}
}
if ($reset) {
my $single = scalar @{$stash_values};
my $param = $single == 1 ? $stash_values->[0] : $stash_values;
$c->param( $name, $param );
}
return $radiobuttons;
}
sub _checkbox {
my ( $self, $c, $field, %params ) = @_;
my $name = $field->{name} // $field->{label} // '';
my $id = $field->{id} // $name;
my %attrs = %{ $field->{attributes} || {} };
my $data = $params{$name}->{data} // $field->{data} // [];
my @values = ref $data ? @{$data} : ($data);
my $field_params = $params{$name} || {},
my %select_params = (
disabled => $self->_get_highlighted_values( $field, 'disabled' ),
selected => $self->_get_highlighted_values( $field, 'selected' ),
);
my $stash_values = $c->every_param($name);
if ( scalar( @{ $stash_values || [] } ) == 0 && defined( $c->stash($name) ) ) {
my $local_stash = $c->stash($name);
$stash_values = ref $local_stash ? $local_stash : [$local_stash];
}
my $reset;
if ( @{ $stash_values || [] } ) {
$select_params{selected} =
$self->_get_highlighted_values( +{ selected => $stash_values }, 'selected', );
$c->param( $name, '' );
$reset = 1;
}
for my $key (qw/disabled selected/) {
my $hashref = $self->_get_highlighted_values( $field_params, $key );
if ( keys %{$hashref} ) {
$select_params{$key} = $hashref;
}
}
my @selected = keys %{ $select_params{selected} };
if (@selected) {
my $single = scalar @selected;
my $param = $single == 1 ? $selected[0] : \@selected;
$c->param( $name, $param );
}
my $checkboxes = '';
for my $checkbox_value (@values) {
my %value_attributes;
if ( $select_params{disabled}->{$checkbox_value} ) {
$value_attributes{disabled} = 'disabled';
}
if ( $select_params{selected}->{$checkbox_value} ) {
$value_attributes{checked} = $checked_value;
}
my $local_label = '';
if ( $field->{show_value} ) {
$local_label = $checkbox_value;
}
my $loc = $field->{translation_method};
if ( length $local_label && $field->{translate_sublabels} && $loc && 'CODE' eq ref $loc ) {
$local_label = $loc->( $c, $local_label );
}
$local_label = " " . $local_label if length $local_label;
$checkboxes .= $c->check_box(
$name => $checkbox_value,
id => $id,
%attrs,
%value_attributes,
) . "$local_label\n";
if ( defined $field->{after_element} ) {
$checkboxes .= $field->{after_element};
}
}
if ($reset) {
my $single = scalar @{$stash_values};
my $param = $single == 1 ? $stash_values->[0] : $stash_values;
$c->param( $name, $param );
}
return $checkboxes;
}
sub _textarea {
my ( $self, $c, $field, %params ) = @_;
my $name = $field->{name} // $field->{label} // '';
my $value = $params{$name}->{data} // $c->stash($name) // $c->param($name) // $field->{data} // '';
my $id = $field->{id} // $name;
my %attrs = %{ $field->{attributes} || {} };
return $c->text_area( $name, $value, id => $id, %attrs );
}
sub _password {
my ( $self, $c, $field, %params ) = @_;
my $name = $field->{name} // $field->{label} // '';
my $value = $params{$name}->{data} // $c->stash($name) // $c->param($name) // $field->{data} // '';
my $id = $field->{id} // $name;
my %attrs = %{ $field->{attributes} || {} };
return $c->password_field( $name, value => $value, id => $id, %attrs );
}
1;
__END__
=pod
=encoding UTF-8
=head1 NAME
Mojolicious::Plugin::FormFieldsFromJSON - create form fields based on a definition in a JSON file
=head1 VERSION
version 0.32
=head1 SYNOPSIS
# Mojolicious
$self->plugin('FormFieldsFromJSON');
# Mojolicious::Lite
plugin 'FormFieldsFromJSON';
=head1 DESCRIPTION
L<Mojolicious::Plugin::FormFieldsFromJSON> is a L<Mojolicious> plugin.
=head1 CONFIGURATION
You can configure some settings for the plugin:
=over 4
=item * dir
The directory where the json files for form field configuration are located
$self->plugin( 'FormFieldsFromJSON' => {
dir => '/home/mojo/fields',
});
You can also pass an arrayreference with directory names. This will help when you
store the JSON files where your templates are...
$self->plugin( 'FormFieldsFromJSON' => {
dir => [
'/home/mojo/templates/admin/json',
'/home/mojo/templates/author/json',
'/home/mojo/templates/guest/json',
]
});
=item * template
With template you can define a template for the form fields.
$self->plugin( 'FormFieldsFromJSON' => {
template => '<label for="<%= $id %>"><%= $label %>:</label><div><%= $field %></div>',
});
See L<Templates|Mojolicious::Plugin::FormFieldsFromJSON/Templates>.
=item * templates
With template you can define type specific templates for the form fields.
plugin 'FormFieldsFromJSON' => {
templates => {
text => '<%= $label %>: <%= $field %>',
},
};
See L<Templates|Mojolicious::Plugin::FormFieldsFromJSON/Templates>.
=item * global_attributes
With I<global_attributes>, you can define attributes that should be set for every field
(except hidden fields)
plugin 'FormFieldsFromJSON' => {
global_attributes => {
class => 'important-field',
},
};
So with this configuration
[
{
"label" : "Name",
"type" : "text",
"name" : "name"
},
{
"label" : "Background",
"type" : "text",
"name" : "background"
}
]
You get
<input class="important-field" id="name" name="name" type="text" value="" />
<input class="important-field" id="background" name="background" type="text" value="" />
=item * alias
Using aliases can help you a lot. Given you want to have several forms where the user can
define a color (e.g. by using I<bootstrap-colorpicker>), you don't want to define the special
templates in each form. Instead you can define those fiels as I<type> "color" and use an alias:
plugin 'FormFieldsFromJSON' => {
template => '<%= $label %>: <%= $field %>',
templates => {
color => '<%= $label %> (color): <%= $field %>',
},
alias => {
color => 'text',
},
};
The alias defines that "color" fields are "text" fields.
So with this configuration
[
{
"label" : "Name",
"type" : "text",
"name" : "name"
},
{
"label" : "Background",
"type" : "color",
"name" : "background"
}
]
You get
<label for="name">Name:</label><div><input id="name" name="name" type="text" value="" /></div>
<label for="background">Background (color):</label><div><input id="background" name="background" type="text" value="" /></div>
=item * translate_labels
If I<translate_labels> is true, the labels for the templates are translated. You have to provide a
L<translation_method|Mojolicious::Plugin::FormFieldsFromJSON/Translation_method>, too.
plugin 'FormFieldsFromJSON' => {
template => '<%= $label %>: <%= $field %>',
translate_labels => 1,
translation_method => \&loc,
};
For more details see L<Translation|Mojolicious::Plugin::FormFieldsFromJSON/Translation>.
=item * translation_method
If I<translate_labels> is true, the labels for the templates are translated. You have to provide a
L<translation_method|Mojolicious::Plugin::FormFieldsFromJSON/Translation_method>, too.
plugin 'FormFieldsFromJSON' => {
template => '<%= $label %>: <%= $field %>',
translate_labels => 1,
translation_method => \&loc,
};
For more details see I<Translation|Mojolicious::Plugin::FormFieldsFromJSON/Translation>.
=item * types
If you have written a plugin that implements a new "type" of input field, you can allow this type by passing
I<types> when you load the plugin.
plugin 'FormFieldsFromJSON' => {
types => {
'testfield' => 1,
},
};
Now you can use
[
{
"label" : "Name",
"type" : "testfield",
"name" : "name"
}
]
For more details see L<Additional Types|/New Types>.