File Type/Theme/ThemeType.php

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<?php
namespace WPGraphQL\Type\Theme;

use GraphQL\Type\Definition\ResolveInfo;
use GraphQLRelay\Relay;
use WPGraphQL\AppContext;
use WPGraphQL\Type\WPObjectType;
use WPGraphQL\Types;

/**
 * Class ThemeType
 * @package WPGraphQL\Type
 * @since 0.0.5
 */
class ThemeType extends WPObjectType {

    /**
     * Holds the type name
     * @var string $type_name
     */
    private static $type_name;

    /**
     * This holds the field definitions
     * @var array $fields
     * @since 0.0.5
     */
    private static $fields;

    /**
     * ThemeType constructor.
     * @since 0.0.5
     */
    public function __construct() {

        /**
         * Set the type_name
         * @since 0.0.5
         */
        self::$type_name = 'Theme';

        $config = [
            'name' => self::$type_name,
            'description' => __( 'A theme object', 'wp-graphql' ),
            'fields' => self::fields(),
            'interfaces' => [ self::node_interface() ],
        ];

        parent::__construct( $config );

    }

    /**
     * fields
     *
     * This defines the fields for the ThemeType. The fields are passed through a filter so the shape of the schema
     * can be modified
     *
     * @return array|\GraphQL\Type\Definition\FieldDefinition[]
     * @since 0.0.5
     */
    private static function fields() {

        if ( null === self::$fields ) :
            self::$fields = function() {
                $fields = [
                    'id' => [
                        'type' => Types::non_null( Types::id() ),
                        'resolve' => function( \WP_Theme $theme, $args, AppContext $context, ResolveInfo $info ) {
                            $stylesheet = $theme->get_stylesheet();

                            return ( ! empty( $info->parentType ) && ! empty( $stylesheet ) ) ? Relay::toGlobalId( 'theme', $stylesheet ) : null;
                        },
                    ],
                    'slug' => [
                        'type' => Types::string(),
                        'description' => __( 'The theme slug is used to internally match themes. Theme slugs can have subdirectories like: my-theme/sub-theme. This field is equivalent to WP_Theme->get_stylesheet().', 'wp-graphql' ),
                        'resolve' => function( \WP_Theme $theme, $args, AppContext $context, ResolveInfo $info ) {
                            $stylesheet = $theme->get_stylesheet();

                            return ! empty( $stylesheet ) ? $stylesheet : null;
                        },
                    ],
                    'name' => [
                        'type' => Types::string(),
                        'description' => __( 'Display name of the theme. This field is equivalent to WP_Theme->get( "Name" ).', 'wp-graphql' ),
                        'resolve' => function( \WP_Theme $theme, $args, AppContext $context, ResolveInfo $info ) {
                            $name = $theme->get( 'Name' );

                            return ! empty( $name ) ? $name : null;
                        },
                    ],
                    'screenshot' => [
                        'type' => Types::string(),
                        'description' => __( 'The URL of the screenshot for the theme. The screenshot is intended to give an overview of what the theme looks like. This field is equivalent to WP_Theme->get_screenshot().', 'wp-graphql' ),
                        'resolve' => function( \WP_Theme $theme, $args, AppContext $context, ResolveInfo $info ) {
                            $screenshot = $theme->get_screenshot();

                            return ! empty( $screenshot ) ? $screenshot : null;
                        },
                    ],
                    'themeUri' => [
                        'type' => Types::string(),
                        'description' => __( 'A URI if the theme has a website associated with it. The Theme URI is handy for directing users to a theme site for support etc. This field is equivalent to WP_Theme->get( "ThemeURI" ).', 'wp-graphql' ),
                        'resolve' => function( \WP_Theme $theme, $args, AppContext $context, ResolveInfo $info ) {
                            $theme_uri = $theme->get( 'ThemeURI' );

                            return ! empty( $theme_uri ) ? $theme_uri : null;
                        },
                    ],
                    'description' => [
                        'type' => Types::string(),
                        'description' => __( 'The description of the theme. This field is equivalent to WP_Theme->get( "Description" ).', 'wp-graphql' ),
                    ],
                    'author' => [
                        'type' => Types::string(),
                        'description' => __( 'Name of the theme author(s), could also be a company name. This field is equivalent to WP_Theme->get( "Author" ).', 'wp-graphql' ),
                    ],
                    'authorUri' => [
                        'type' => Types::string(),
                        'description' => __( 'URI for the author/company website. This field is equivalent to WP_Theme->get( "AuthorURI" ).', 'wp-graphql' ),
                        'resolve' => function( \WP_Theme $theme, $args, AppContext $context, ResolveInfo $info ) {
                            $author_uri = $theme->get( 'AuthorURI' );

                            return ! empty( $author_uri ) ? $author_uri : null;
                        },
                    ],
                    'tags' => [
                        'type' => Types::list_of( Types::string() ),
                        'description' => __( 'URI for the author/company website. This field is equivalent to WP_Theme->get( "Tags" ).', 'wp-graphql' ),
                    ],
                    'version' => [
                        'type' => Types::float(),
                        'description' => __( 'The current version of the theme. This field is equivalent to WP_Theme->get( "Version" ).', 'wp-graphql' ),
                    ],
                ];

                /**
                 * This prepares the fields by sorting them and applying a filter for adjusting the schema.
                 * Because these fields are implemented via a closure the prepare_fields needs to be applied
                 * to the fields directly instead of being applied to all objects extending
                 * the WPObjectType class.
                 */
                return self::prepare_fields( $fields, self::$type_name );

            };
        endif;
        return self::$fields;
    }

}

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