WP_REST_Widgets_Controller::prepare_item_for_response() WordPress Method

	public function prepare_item_for_response( $item, $request ) {
		global $wp_widget_factory, $wp_registered_widgets;

		$widget_id  = $item['widget_id'];
		$sidebar_id = $item['sidebar_id'];

		if ( ! isset( $wp_registered_widgets[ $widget_id ] ) ) {
			return new WP_Error(
				'rest_invalid_widget',
				__( 'The requested widget is invalid.' ),
				array( 'status' => 500 )
			);
		}

		$widget    = $wp_registered_widgets[ $widget_id ];
		$parsed_id = wp_parse_widget_id( $widget_id );
		$fields    = $this->get_fields_for_response( $request );

		$prepared = array(
			'id'            => $widget_id,
			'id_base'       => $parsed_id['id_base'],
			'sidebar'       => $sidebar_id,
			'rendered'      => '',
			'rendered_form' => null,
			'instance'      => null,
		);

		if (
			rest_is_field_included( 'rendered', $fields ) &&
			'wp_inactive_widgets' !== $sidebar_id
		) {
			$prepared['rendered'] = trim( wp_render_widget( $widget_id, $sidebar_id ) );
		}

		if ( rest_is_field_included( 'rendered_form', $fields ) ) {
			$rendered_form = wp_render_widget_control( $widget_id );
			if ( ! is_null( $rendered_form ) ) {
				$prepared['rendered_form'] = trim( $rendered_form );
			}
		}

		if ( rest_is_field_included( 'instance', $fields ) ) {
			$widget_object = $wp_widget_factory->get_widget_object( $parsed_id['id_base'] );
			if ( $widget_object && isset( $parsed_id['number'] ) ) {
				$all_instances                   = $widget_object->get_settings();
				$instance                        = $all_instances[ $parsed_id['number'] ];
				$serialized_instance             = serialize( $instance );
				$prepared['instance']['encoded'] = base64_encode( $serialized_instance );
				$prepared['instance']['hash']    = wp_hash( $serialized_instance );

				if ( ! empty( $widget_object->widget_options['show_instance_in_rest'] ) ) {
					// Use new stdClass so that JSON result is {} and not [].
					$prepared['instance']['raw'] = empty( $instance ) ? new stdClass : $instance;
				}
			}
		}

		$context  = ! empty( $request['context'] ) ? $request['context'] : 'view';
		$prepared = $this->add_additional_fields_to_object( $prepared, $request );
		$prepared = $this->filter_response_by_context( $prepared, $context );

		$response = rest_ensure_response( $prepared );

		$response->add_links( $this->prepare_links( $prepared ) );

		/**
		 * Filters the REST API response for a widget.
		 *
		 * @since 5.8.0
		 *
		 * @param WP_REST_Response|WP_Error $response The response object, or WP_Error object on failure.
		 * @param array                     $widget   The registered widget data.
		 * @param WP_REST_Request           $request  Request used to generate the response.
		 */
		return apply_filters( 'rest_prepare_widget', $response, $widget, $request );
	}