Performance global styles WP_Query

lib/experimental/class-wp-theme-json-resolver-gutenberg.php

@@ -16,6 +16,88 @@
  * @access private
  */
 class WP_Theme_JSON_Resolver_Gutenberg extends WP_Theme_JSON_Resolver_6_2 {
+
+	/**
+	 * Returns the custom post type that contains the user's origin config
+	 * for the active theme or a void array if none are found.
+	 *
+	 * This can also create and return a new draft custom post type.
+	 *
+	 *
+	 * @param WP_Theme $theme              The theme object. If empty, it
+	 *                                     defaults to the active theme.
+	 * @param bool     $create_post        Optional. Whether a new custom post
+	 *                                     type should be created if none are
+	 *                                     found. Default false.
+	 * @param array    $post_status_filter Optional. Filter custom post type by
+	 *                                     post status. Default `array( 'publish' )`,
+	 *                                     so it only fetches published posts.
+	 * @return array Custom Post Type for the user's origin config.
+	 */
+	public static function get_user_data_from_wp_global_styles( $theme, $create_post = false, $post_status_filter = array( 'publish' ) ) {
+		if ( ! $theme instanceof WP_Theme ) {
+			$theme = wp_get_theme();
+		}
+
+		/*
+		 * Bail early if the theme does not support a theme.json.
+		 *
+		 * Since WP_Theme_JSON_Resolver::theme_has_support() only supports the active
+		 * theme, the extra condition for whether $theme is the active theme is
+		 * present here.
+		 */
+		if ( $theme->get_stylesheet() === get_stylesheet() && ! static::theme_has_support() ) {
+			return array();
+		}
+
+		$user_cpt         = array();
+		$post_type_filter = 'wp_global_styles';
+		$stylesheet       = $theme->get_stylesheet();
+		$args = array(
+			'posts_per_page'         => 1,
+			'orderby'                => 'date',
+			'order'                  => 'desc',
+			'post_type'              => $post_type_filter,
+			'post_status'            => $post_status_filter,
+			'ignore_sticky_posts'    => true,
+			'no_found_rows'          => true,
+			'update_post_meta_cache' => false,
+			'update_post_term_cache' => false,
+			'tax_query'              => array(
+				array(
+					'taxonomy' => 'wp_theme',
+					'field'    => 'name',
+					'terms'    => $stylesheet,
+				),
+			),
+		);
+
+		$global_style_query = new WP_Query();
+		$recent_posts       = $global_style_query->query( $args );
+		if ( count( $recent_posts ) === 1 ) {
+			$user_cpt = get_object_vars( $recent_posts[0] );
+		} elseif ( $create_post ) {
+			$cpt_post_id = wp_insert_post(
+				array(
+					'post_content' => '{"version": ' . WP_Theme_JSON::LATEST_SCHEMA . ', "isGlobalStylesUserThemeJSON": true }',
+					'post_status'  => 'publish',
+					'post_title'   => 'Custom Styles', // Do not make string translatable, see https://core.trac.wordpress.org/ticket/54518.
+					'post_type'    => $post_type_filter,
+					'post_name'    => sprintf( 'wp-global-styles-%s', urlencode( $stylesheet ) ),
+					'tax_input'    => array(
+						'wp_theme' => array( $stylesheet ),
+					),
+				),
+				true
+			);
+			if ( ! is_wp_error( $cpt_post_id ) ) {
+				$user_cpt = get_object_vars( get_post( $cpt_post_id ) );
+			}
+		}
+
+		return $user_cpt;
+	}
+
 	/**
 	 * Returns the theme's data.
 	 *