<?php

defined( 'ABSPATH' ) || exit;

if ( ! class_exists( 'AIEO_Runtime_Store_Session_Cache', false ) ) {

	final class AIEO_Runtime_Store_Session_Cache {

		
		const FIXED_IN = '';

		
		const HANDLER = 'Automattic\\WooCommerce\\StoreApi\\SessionHandler';

		
		private static $booted = false;

		
		private static $ids = array();

		
		public static function boot() {
			if ( self::$booted ) {
				return;
			}
			self::$booted = true;
			if ( wp_using_ext_object_cache() ) {
				add_filter( 'woocommerce_session_handler', array( __CLASS__, 'watch' ), 1000 );
			}
		}

		
		public static function watch( $class ) {
			if ( is_string( $class ) && self::HANDLER === ltrim( $class, '\\' ) && self::applies() ) {
				add_action( 'woocommerce_cart_loaded_from_session', array( __CLASS__, 'remember' ), 1 );
				add_action( 'shutdown', array( __CLASS__, 'sync' ), 21 );
			}
			return $class;
		}

		
		public static function applies() {
			if ( ! wp_using_ext_object_cache() || ! class_exists( 'WC_Cache_Helper' ) || ! defined( 'WC_SESSION_CACHE_GROUP' ) ) {
				return false;
			}
			if ( '' !== self::FIXED_IN && defined( 'WC_VERSION' ) && version_compare( WC_VERSION, self::FIXED_IN, '>=' ) ) {
				return false;
			}
			return (bool) apply_filters( 'aieo_store_session_cache_sync', true );
		}

		
		public static function remember() {
			self::note( self::session() );
		}

		
		public static function sync( $session = null ) {
			self::note( is_object( $session ) ? $session : self::session() );
			if ( ! self::$ids || ! self::applies() ) {
				self::$ids = array();
				return;
			}
			$prefix = WC_Cache_Helper::get_cache_prefix( WC_SESSION_CACHE_GROUP );
			foreach ( array_keys( self::$ids ) as $id ) {
				wp_cache_delete( $prefix . $id, WC_SESSION_CACHE_GROUP );
			}
			self::$ids = array();
		}

		
		private static function note( $session ) {
			if ( is_object( $session ) && is_a( $session, self::HANDLER ) && method_exists( $session, 'get_customer_id' ) ) {
				$id = (string) $session->get_customer_id();
				if ( '' !== $id ) {
					self::$ids[ $id ] = true;
				}
			}
		}

		
		private static function session() {
			if ( ! function_exists( 'WC' ) ) {
				return null;
			}
			$wc = WC();
			return ( is_object( $wc ) && isset( $wc->session ) && is_object( $wc->session ) ) ? $wc->session : null;
		}
	}
}