* @return void
	 */
	public function maybe_redirect_to_sales_page() {

		// Only proceed for courses and memberships.
		if ( ! in_array( get_post_type(), array( 'course', 'llms_membership' ), true ) ) {
			return;
		}

		$page_restricted = llms_page_restricted( get_the_id() );

		// Only proceed if the page isn't restricted.
		if ( ! $page_restricted['is_restricted'] ) {
			return;
		}

		/** @var LLMS_Trait_Sales_Page $post */
		$post = llms_get_post( get_the_ID() );

		if ( ! $post->has_sales_page_redirect() ) {
			return;
		}

		llms_redirect_and_exit(
			llms_notice_count() ?
				add_query_arg(
					array(
						'llms_print_notices' => 1,
					),
					$post->get_sales_page_url()
				) : $post->get_sales_page_url(),
			array(
				'safe' => false,
			)
		);