public function generate_breadcrumblist_data( $breadcrumbs ) {
		$crumbs = $breadcrumbs->get_breadcrumb();

		if ( empty( $crumbs ) || ! is_array( $crumbs ) ) {
			return;
		}

		$markup                    = array();
		$markup['@type']           = 'BreadcrumbList';
		$markup['itemListElement'] = array();

		foreach ( $crumbs as $key => $crumb ) {
			$markup['itemListElement'][ $key ] = array(
				'@type'    => 'ListItem',
				'position' => $key + 1,
				'item'     => array(
					'name' => $crumb[0],
				),
			);

			if ( ! empty( $crumb[1] ) ) {
				$markup['itemListElement'][ $key ]['item'] += array( '@id' => $crumb[1] );
			} elseif ( isset( $_SERVER['HTTP_HOST'], $_SERVER['REQUEST_URI'] ) ) {
				$current_url = set_url_scheme( 'http://' . wp_unslash( $_SERVER['HTTP_HOST'] ) . wp_unslash( $_SERVER['REQUEST_URI'] ) ); // phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized

				$markup['itemListElement'][ $key ]['item'] += array( '@id' => $current_url );
			}
		}

		$this->set_data( apply_filters( 'woocommerce_structured_data_breadcrumblist', $markup, $breadcrumbs ) );
	}