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|
package GraphQL::Type::Object;
use 5.014;
use strict;
use warnings;
use Moo;
use GraphQL::Debug qw(_debug);
use Types::Standard -all;
use GraphQL::Type::Library -all;
use MooX::Thunking;
use GraphQL::MaybeTypeCheck;
extends qw(GraphQL::Type);
with qw(
GraphQL::Role::Output
GraphQL::Role::Composite
GraphQL::Role::Nullable
GraphQL::Role::Named
GraphQL::Role::FieldsOutput
GraphQL::Role::HashMappable
);
our $VERSION = '0.02';
use constant DEBUG => $ENV{GRAPHQL_DEBUG};
=head1 NAME
GraphQL::Type::Object - GraphQL object type
=head1 SYNOPSIS
use GraphQL::Type::Object;
my $interface_type;
my $implementing_type = GraphQL::Type::Object->new(
name => 'Object',
interfaces => [ $interface_type ],
fields => { field_name => { type => $scalar_type, resolve => sub { '' } }},
);
=head1 ATTRIBUTES
Has C<name>, C<description> from L<GraphQL::Role::Named>.
Has C<fields> from L<GraphQL::Role::FieldsOutput>.
=head2 interfaces
Optional, thunked array-ref of interface type objects implemented.
=cut
has interfaces => (is => 'thunked', isa => ArrayRef[InstanceOf['GraphQL::Type::Interface']]);
=head2 is_type_of
Optional code-ref. Input is a value, an execution context hash-ref,
and resolve-info hash-ref.
=cut
has is_type_of => (is => 'ro', isa => CodeRef);
method graphql_to_perl(Maybe[HashRef] $item) :ReturnType(Maybe[HashRef]) {
return $item if !defined $item;
$item = $self->uplift($item);
my $fields = $self->fields;
$self->hashmap($item, $fields, sub {
my ($key, $value) = @_;
$fields->{$key}{type}->graphql_to_perl(
$value // $fields->{$key}{default_value}
);
});
}
has to_doc => (is => 'lazy', isa => Str);
sub _build_to_doc {
my ($self) = @_;
DEBUG and _debug('Object.to_doc', $self);
my @fieldlines = map {
my ($main, @description) = @$_;
(
@description,
$main,
)
} $self->_make_fieldtuples($self->fields);
my $implements = join ' & ', map $_->name, @{ $self->interfaces || [] };
$implements &&= 'implements ' . $implements . ' ';
join '', map "$_\n",
$self->_description_doc_lines($self->description),
"type @{[$self->name]} $implements\{",
(map length() ? " $_" : "", @fieldlines),
"}";
}
method from_ast(
HashRef $name2type,
HashRef $ast_node,
) :ReturnType(InstanceOf[__PACKAGE__]) {
$self->new(
$self->_from_ast_named($ast_node),
$self->_from_ast_maptype($name2type, $ast_node, 'interfaces'),
$self->_from_ast_fields($name2type, $ast_node, 'fields'),
);
}
method _collect_fields(
HashRef $context,
ArrayRef $selections,
FieldsGot $fields_got,
Map[StrNameValid,Bool] $visited_fragments,
) {
DEBUG and _debug('_collect_fields', $self->to_string, $fields_got, $selections);
for my $selection (@$selections) {
my $node = $selection;
next if !_should_include_node($context->{variable_values}, $node);
if ($selection->{kind} eq 'field') {
my $use_name = $node->{alias} || $node->{name};
my ($field_names, $nodes_defs) = @$fields_got;
$field_names = [ @$field_names, $use_name ] if !exists $nodes_defs->{$use_name};
$nodes_defs = {
%$nodes_defs,
$use_name => [ @{$nodes_defs->{$use_name} || []}, $node ],
};
$fields_got = [ $field_names, $nodes_defs ]; # no mutation
} elsif ($selection->{kind} eq 'inline_fragment') {
next if !$self->_fragment_condition_match($context, $node);
($fields_got, $visited_fragments) = $self->_collect_fields(
$context,
$node->{selections},
$fields_got,
$visited_fragments,
);
} elsif ($selection->{kind} eq 'fragment_spread') {
my $frag_name = $node->{name};
next if $visited_fragments->{$frag_name};
$visited_fragments = { %$visited_fragments, $frag_name => 1 }; # !mutate
my $fragment = $context->{fragments}{$frag_name};
next if !$fragment;
next if !$self->_fragment_condition_match($context, $fragment);
DEBUG and _debug('_collect_fields(fragment_spread)', $fragment);
($fields_got, $visited_fragments) = $self->_collect_fields(
$context,
$fragment->{selections},
$fields_got,
$visited_fragments,
);
}
}
($fields_got, $visited_fragments);
}
method _fragment_condition_match(
HashRef $context,
HashRef $node,
) :ReturnType(Bool) {
DEBUG and _debug('_fragment_condition_match', $self->to_string, $node);
return 1 if !$node->{on};
return 1 if $node->{on} eq $self->name;
my $condition_type = $context->{schema}->name2type->{$node->{on}} //
die GraphQL::Error->new(
message => "Unknown type for fragment condition '$node->{on}'."
);
return '' if !$condition_type->DOES('GraphQL::Role::Abstract');
$context->{schema}->is_possible_type($condition_type, $self);
}
fun _should_include_node(
HashRef $variables,
HashRef $node,
) :ReturnType(Bool) {
DEBUG and _debug('_should_include_node', $variables, $node);
my $skip = $GraphQL::Directive::SKIP->_get_directive_values($node, $variables);
return '' if $skip and $skip->{if};
my $include = $GraphQL::Directive::INCLUDE->_get_directive_values($node, $variables);
return '' if $include and !$include->{if};
1;
}
method _complete_value(
HashRef $context,
ArrayRef[HashRef] $nodes,
HashRef $info,
ArrayRef $path,
Any $result,
) {
if ($self->is_type_of) {
my $is_type_of = $self->is_type_of->($result, $context->{context_value}, $info);
# TODO promise stuff
die GraphQL::Error->new(message => "Expected a value of type '@{[$self->to_string]}' but received: '@{[ref($result)||$result]}'.") if !$is_type_of;
}
my $subfield_nodes = [[], {}];
my $visited_fragment_names = {};
for (grep $_->{selections}, @$nodes) {
($subfield_nodes, $visited_fragment_names) = $self->_collect_fields(
$context,
$_->{selections},
$subfield_nodes,
$visited_fragment_names,
);
}
DEBUG and _debug('Object._complete_value', $self->to_string, $subfield_nodes, $result);
GraphQL::Execution::_execute_fields($context, $self, $result, $path, $subfield_nodes);
}
__PACKAGE__->meta->make_immutable();
1;
|
