e.
	 *
	 * @since 5.8.0
	 * @since 5.9.0 Renamed `$raw_sidebar` to `$item` to match parent class for PHP 8 named parameter support.
	 *
	 * @global array $wp_registered_sidebars The registered sidebars.
	 * @global array $wp_registered_widgets  The registered widgets.
	 *
	 * @param array           $item    Sidebar instance.
	 * @param WP_REST_Request $request Full details about the request.
	 * @return WP_REST_Response Prepared response object.
	 */
	public function prepare_item_for_response( $item, $request ) {
		global $wp_registered_sidebars, $wp_registered_widgets;

		// Restores the more descriptive, specific name for use within this method.
		$raw_sidebar = $item;

		$id      = $raw_sidebar['id'];
		$sidebar = array( 'id' => $id );

		if ( isset( $wp_registered_sidebars[ $id ] ) ) {
			$registered_sidebar = $wp_registered_sidebars[ $id ];

			$sidebar['status']        = 'active';
			$sidebar['name']          = isset( $registered_sidebar['name'] ) ? $registered_sidebar['name'] : '';
			$sidebar['description']   = isset( $registered_sidebar['description'] ) ? wp_sidebar_description( $id ) : '';
			$sidebar['class']         = isset( $registered_sidebar['class'] ) ? $registered_sidebar['class'] : '';
			$sidebar['before_widget'] = isset( $registered_sidebar['before_widget'] ) ? $registered_sidebar['before_widget'] : '';
			$sidebar['after_widget']  = isset( $registered_sidebar['after_widget'] ) ? $registered_sidebar['after_widget'] : '';
			$sidebar['before_title']  = isset( $registered_sidebar['before_title'] ) ? $registered_sidebar['before_title'] : '';
			$sidebar['after_title']   = isset( $registered_sidebar['after_title'] ) ? $registered_sidebar['after_title'] : '';
		} else {
			$sidebar['status']      = 'inactive';
			$sidebar['name']        = $raw_sidebar['name'];
			$sidebar['description'] = '';
			$sidebar['class']       = '';
		}

		if ( wp_is_block_theme() ) {
			$sidebar['status'] = 'inactive';
		}

		$fields = $this->get_fields_for_response( $request );
		if ( rest_is_field_included( 'widgets', $fields ) ) {
			$sidebars = wp_get_sidebars_widgets();
			$widgets  = array_filter(
				isset( $sidebars[ $sidebar['id'] ] ) ? $sidebars[ $sidebar['id'] ] : array(),
				static function ( $widget_id ) use ( $wp_registered_widgets ) {
					return isset( $wp_registered_widgets[ $widget_id ] );
				}
			);

			$sidebar['widgets'] = array_values( $widgets );
		}

		$schema = $this->get_item_schema();
		$data   = array();
		foreach ( $schema['properties'] as $property_id => $property ) {
			if ( isset( $sidebar[ $property_id ] ) && true === rest_validate_value_from_schema( $sidebar[ $property_id ], $property ) ) {
				$data[ $property_id ] = $sidebar[ $property_id ];
			} elseif ( isset( $property['default'] ) ) {
				$data[ $property_id ] = $property['default'];
			}
		}

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

		$response = rest_ensure_response( $data );

		if ( rest_is_field_included( '_links', $fields ) || rest_is_field_included( '_embedded', $fields ) ) {
			$response->add_links( $this->prepare_links( $sidebar ) );
		}

		/**
		 * Filters the REST API response for a sidebar.
		 *
		 * @since 5.8.0
		 *
		 * @param WP_REST_Response $response    The response object.
		 * @param array            $raw_sidebar The raw sidebar data.
		 * @param WP_REST_Request  $request     The request object.
		 */
		return apply_filters( 'rest_prepare_sidebar', $response, $raw_sidebar, $request );
	}

	/**
	 * Prepares links for the sidebar.
	 *
	 * @since 5.8.0
	 *
	 * @param array $sidebar Sidebar.
	 * @return array Links for the given widget.
	 */
	protected function prepare_links( $sidebar ) {
		return array(
			'collection'               => array(
				'href' => rest_url( sprintf( '%s/%s', $this->namespace, $this->rest_base ) ),
			),
			'self'                     => array(
				'href' => rest_url( sprintf( '%s/%s/%s', $this->namespace, $this->rest_base, $sidebar['id'] ) ),
			),
			'https://api.w.org/widget' => array(
				'href'       => add_query_arg( 'sidebar', $sidebar['id'], rest_url( '/wp/v2/widgets' ) ),
				'embeddable' => true,
			),
		);
	}

	/**
	 * Retrieves the block type' schema, conforming to JSON Schema.
	 *
	 * @since 5.8.0
	 *
	 * @return array Item schema data.
	 */
	public function get_item_schema() {
		if ( $this->schema ) {
			return $this->add_additional_fields_schema( $this->schema );
		}

		$schema = array(
			'$schema'    => 'http://json-schema.org/draft-04/schema#',
			'title'      => 'sidebar',
			'type'       => 'object',
			'properties' => array(
				'id'            => array(
					'description' => __( 'ID of sidebar.' ),
					'type'        => 'string',
					'context'     => array( 'embed', 'view', 'edit' ),
					'readonly'    => true,
				),
				'name'          => array(
					'description' => __( 'Unique name identifying the sidebar.' ),
					'type'        => 'string',
					'context'     => array( 'embed', 'view', 'edit' ),
					'readonly'    => true,
				),
				'description'   => array(
					'description' => __( 'Description of sidebar.' ),
					'type'        => 'string',
					'context'     => array( 'embed', 'view', 'edit' ),
					'readonly'    => true,
				),
				'class'         => array(
					'description' => __( 'Extra CSS class to assign to the sidebar in the Widgets interface.' ),
					'type'        => 'string',
					'context'     => array( 'embed', 'view', 'edit' ),
					'readonly'    => true,
				),
				'before_widget' => array(
					'description' => __( 'HTML content to prepend to each widget\'s HTML output when assigned to this sidebar. Default is an opening list item element.' ),
					'type'        => 'string',
					'default'     => '',
					'context'     => array( 'embed', 'view', 'edit' ),
					'readonly'    => true,
				),
				'after_widget'  => array(
					'description' => __( 'HTML content to append to each widget\'s HTML output when assigned to this sidebar. Default is a closing list item element.' ),
					'type'        => 'string',
					'default'     => '',
					'context'     => array( 'embed', 'view', 'edit' ),
					'readonly'    => true,
				),
				'before_title'  => array(
					'description' => __( 'HTML content to prepend to the sidebar title when displayed. Default is an opening h2 element.' ),
					'type'        => 'string',
					'default'     => '',
					'context'     => array( 'embed', 'view', 'edit' ),
					'readonly'    => true,
				),
				'after_title'   => array(
					'description' => __( 'HTML content to append to the sidebar title when displayed. Default is a closing h2 element.' ),
					'type'        => 'string',
					'default'     => '',
					'context'     => array( 'embed', 'view', 'edit' ),
					'readonly'    => true,
				),
				'status'        => array(
					'description' => __( 'Status of sidebar.' ),
					'type'        => 'string',
					'enum'        => array( 'active', 'inactive' ),
					'context'     => array( 'embed', 'view', 'edit' ),
					'readonly'    => true,
				),
				'widgets'       => array(
					'description' => __( 'Nested widgets.' ),
					'type'        => 'array',
					'items'       => array(
						'type' => array( 'object', 'string' ),
					),
					'default'     => array(),
					'context'     => array( 'embed', 'view', 'edit' ),
				),
			),
		);

		$this->schema = $schema;

		return $this->add_additional_fields_schema( $this->schema );
	}
}