<?php

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/**

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* The object cache class.

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*

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* @since 1.8

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* @package LiteSpeed

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*/

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namespace LiteSpeed;

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defined( 'WPINC' ) || exit();

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require_once dirname( __DIR__ ) . '/autoload.php';

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/**

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* Object cache handler using Redis or Memcached.

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*

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* NOTE: this class may be included without initialized core.

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*

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* @since 1.8

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*/

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class Object_Cache extends Root {

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const LOG_TAG = '[Object_Cache]';

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/**

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* Debug option key.

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*

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* @var string

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*/

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const O_DEBUG = 'debug';

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/**

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* Object cache enable key.

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*

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* @var string

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*/

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const O_OBJECT = 'object';

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/**

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* Object kind (Redis/Memcached).

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*

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* @var string

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*/

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const O_OBJECT_KIND = 'object-kind';

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/**

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* Object host.

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*

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* @var string

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*/

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const O_OBJECT_HOST = 'object-host';

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/**

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* Object port.

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*

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* @var string

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*/

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const O_OBJECT_PORT = 'object-port';

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/**

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* Object life/TTL.

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*

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* @var string

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*/

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const O_OBJECT_LIFE = 'object-life';

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/**

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* Persistent connection flag.

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*

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* @var string

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*/

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const O_OBJECT_PERSISTENT = 'object-persistent';

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/**

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* Admin cache flag.

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*

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* @var string

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*/

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const O_OBJECT_ADMIN = 'object-admin';

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/**

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* Transients store flag.

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*

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* @var string

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*/

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const O_OBJECT_TRANSIENTS = 'object-transients';

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/**

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* DB index for Redis.

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*

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* @var string

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*/

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const O_OBJECT_DB_ID = 'object-db_id';

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/**

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* Username for auth.

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*

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* @var string

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*/

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const O_OBJECT_USER = 'object-user';

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/**

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* Password for auth.

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*

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* @var string

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*/

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const O_OBJECT_PSWD = 'object-pswd';

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/**

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* Global groups list.

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*

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* @var string

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*/

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const O_OBJECT_GLOBAL_GROUPS = 'object-global_groups';

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/**

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* Non-persistent groups list.

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*

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* @var string

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*/

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const O_OBJECT_NON_PERSISTENT_GROUPS = 'object-non_persistent_groups';

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/**

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* Connection instance.

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*

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* @var \Redis|\Memcached|null

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*/

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private $_conn;

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/**

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* Debug config.

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*

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* @var bool

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*/

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private $_cfg_debug;

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/**

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* Whether OC is enabled.

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*

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* @var bool

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*/

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private $_cfg_enabled;

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/**

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* True => Redis, false => Memcached.

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*

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* @var bool

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*/

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private $_cfg_method;

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/**

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* Host name.

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*

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* @var string

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*/

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private $_cfg_host;

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/**

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* Port number.

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*

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* @var int|string

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*/

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private $_cfg_port;

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/**

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* TTL in seconds.

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*

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* @var int

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*/

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private $_cfg_life;

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/**

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* Use persistent connection.

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*

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* @var bool

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*/

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private $_cfg_persistent;

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/**

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* Cache admin pages.

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*

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* @var bool

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*/

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private $_cfg_admin;

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/**

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* Store transients.

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*

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* @var bool

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*/

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private $_cfg_transients;

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/**

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* Redis DB index.

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*

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* @var int

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*/

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private $_cfg_db;

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/**

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* Auth username.

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*

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* @var string

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*/

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private $_cfg_user;

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/**

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* Auth password.

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*

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* @var string

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*/

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private $_cfg_pswd;

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/**

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* Default TTL in seconds.

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*

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* @var int

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*/

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private $_default_life = 360;

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/**

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* 'Redis' or 'Memcached'.

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*

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* @var string

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*/

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private $_oc_driver = 'Memcached'; // Redis or Memcached.

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/**

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* Global groups.

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*

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* @var array

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*/

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private $_global_groups = [];

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/**

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* Non-persistent groups.

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*

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* @var array

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*/

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private $_non_persistent_groups = [];

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/**

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* Init.

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*

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* NOTE: this class may be included without initialized core.

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*

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* @since 1.8

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*

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* @param array|false $cfg Optional configuration to bootstrap without core.

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*/

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public function __construct( $cfg = false ) {

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if ( $cfg ) {

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if ( ! is_array( $cfg[ Base::O_OBJECT_GLOBAL_GROUPS ] ) ) {

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$cfg[ Base::O_OBJECT_GLOBAL_GROUPS ] = explode( "\n", $cfg[ Base::O_OBJECT_GLOBAL_GROUPS ] );

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}

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if ( ! is_array( $cfg[ Base::O_OBJECT_NON_PERSISTENT_GROUPS ] ) ) {

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$cfg[ Base::O_OBJECT_NON_PERSISTENT_GROUPS ] = explode( "\n", $cfg[ Base::O_OBJECT_NON_PERSISTENT_GROUPS ] );

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}

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$this->_cfg_debug = $cfg[ Base::O_DEBUG ] ? $cfg[ Base::O_DEBUG ] : false;

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$this->_cfg_method = $cfg[ Base::O_OBJECT_KIND ] ? true : false;

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$this->_cfg_host = $cfg[ Base::O_OBJECT_HOST ];

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$this->_cfg_port = $cfg[ Base::O_OBJECT_PORT ];

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$this->_cfg_life = $cfg[ Base::O_OBJECT_LIFE ];

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$this->_cfg_persistent = $cfg[ Base::O_OBJECT_PERSISTENT ];

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$this->_cfg_admin = $cfg[ Base::O_OBJECT_ADMIN ];

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$this->_cfg_transients = $cfg[ Base::O_OBJECT_TRANSIENTS ];

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$this->_cfg_db = $cfg[ Base::O_OBJECT_DB_ID ];

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$this->_cfg_user = $cfg[ Base::O_OBJECT_USER ];

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$this->_cfg_pswd = $cfg[ Base::O_OBJECT_PSWD ];

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$this->_global_groups = $cfg[ Base::O_OBJECT_GLOBAL_GROUPS ];

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$this->_non_persistent_groups = $cfg[ Base::O_OBJECT_NON_PERSISTENT_GROUPS ];

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if ( $this->_cfg_method ) {

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$this->_oc_driver = 'Redis';

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}

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$this->_cfg_enabled = $cfg[ Base::O_OBJECT ] && class_exists( $this->_oc_driver ) && $this->_cfg_host;

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} elseif ( defined( 'LITESPEED_CONF_LOADED' ) ) { // If OC is OFF, will hit here to init OC after conf initialized

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$this->_cfg_debug = $this->conf( Base::O_DEBUG ) ? $this->conf( Base::O_DEBUG ) : false;

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$this->_cfg_method = $this->conf( Base::O_OBJECT_KIND ) ? true : false;

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$this->_cfg_host = $this->conf( Base::O_OBJECT_HOST );

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$this->_cfg_port = $this->conf( Base::O_OBJECT_PORT );

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$this->_cfg_life = $this->conf( Base::O_OBJECT_LIFE );

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$this->_cfg_persistent = $this->conf( Base::O_OBJECT_PERSISTENT );

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$this->_cfg_admin = $this->conf( Base::O_OBJECT_ADMIN );

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$this->_cfg_transients = $this->conf( Base::O_OBJECT_TRANSIENTS );

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$this->_cfg_db = $this->conf( Base::O_OBJECT_DB_ID );

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$this->_cfg_user = $this->conf( Base::O_OBJECT_USER );

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$this->_cfg_pswd = $this->conf( Base::O_OBJECT_PSWD );

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$this->_global_groups = $this->conf( Base::O_OBJECT_GLOBAL_GROUPS );

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$this->_non_persistent_groups = $this->conf( Base::O_OBJECT_NON_PERSISTENT_GROUPS );

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if ( $this->_cfg_method ) {

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$this->_oc_driver = 'Redis';

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}

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$this->_cfg_enabled = $this->conf( Base::O_OBJECT ) && class_exists( $this->_oc_driver ) && $this->_cfg_host;

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} elseif ( defined( 'self::CONF_FILE' ) && file_exists( WP_CONTENT_DIR . '/' . self::CONF_FILE ) ) {

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// Get cfg from _data_file.

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// Use self::const to avoid loading more classes.

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$cfg = \json_decode( file_get_contents( WP_CONTENT_DIR . '/' . self::CONF_FILE ), true );

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if ( ! empty( $cfg[ self::O_OBJECT_HOST ] ) ) {

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$this->_cfg_debug = ! empty( $cfg[ Base::O_DEBUG ] ) ? $cfg[ Base::O_DEBUG ] : false;

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$this->_cfg_method = ! empty( $cfg[ self::O_OBJECT_KIND ] ) ? $cfg[ self::O_OBJECT_KIND ] : false;

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$this->_cfg_host = $cfg[ self::O_OBJECT_HOST ];

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$this->_cfg_port = $cfg[ self::O_OBJECT_PORT ];

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$this->_cfg_life = ! empty( $cfg[ self::O_OBJECT_LIFE ] ) ? $cfg[ self::O_OBJECT_LIFE ] : $this->_default_life;

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$this->_cfg_persistent = ! empty( $cfg[ self::O_OBJECT_PERSISTENT ] ) ? $cfg[ self::O_OBJECT_PERSISTENT ] : false;

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$this->_cfg_admin = ! empty( $cfg[ self::O_OBJECT_ADMIN ] ) ? $cfg[ self::O_OBJECT_ADMIN ] : false;

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$this->_cfg_transients = ! empty( $cfg[ self::O_OBJECT_TRANSIENTS ] ) ? $cfg[ self::O_OBJECT_TRANSIENTS ] : false;

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$this->_cfg_db = ! empty( $cfg[ self::O_OBJECT_DB_ID ] ) ? $cfg[ self::O_OBJECT_DB_ID ] : 0;

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$this->_cfg_user = ! empty( $cfg[ self::O_OBJECT_USER ] ) ? $cfg[ self::O_OBJECT_USER ] : '';

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$this->_cfg_pswd = ! empty( $cfg[ self::O_OBJECT_PSWD ] ) ? $cfg[ self::O_OBJECT_PSWD ] : '';

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$this->_global_groups = ! empty( $cfg[ self::O_OBJECT_GLOBAL_GROUPS ] ) ? $cfg[ self::O_OBJECT_GLOBAL_GROUPS ] : [];

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$this->_non_persistent_groups = ! empty( $cfg[ self::O_OBJECT_NON_PERSISTENT_GROUPS ] ) ? $cfg[ self::O_OBJECT_NON_PERSISTENT_GROUPS ] : [];

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if ( $this->_cfg_method ) {

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$this->_oc_driver = 'Redis';

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}

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$this->_cfg_enabled = class_exists( $this->_oc_driver ) && $this->_cfg_host;

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} else {

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$this->_cfg_enabled = false;

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}

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} else {

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$this->_cfg_enabled = false;

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}

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}

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/**

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* Add debug.

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*

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* @since 6.3

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* @access private

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*

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* @param string $text Log text.

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* @return void

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*/

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private function debug_oc( $text ) {

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if ( defined( 'LSCWP_LOG' ) ) {

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self::debug( $text );

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return;

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}

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if ( Base::VAL_ON2 !== $this->_cfg_debug ) {

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return;

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}

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$litespeed_data_folder = defined( 'LITESPEED_DATA_FOLDER' ) ? LITESPEED_DATA_FOLDER : 'litespeed';

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$lscwp_content_dir = defined( 'LSCWP_CONTENT_DIR' ) ? LSCWP_CONTENT_DIR : WP_CONTENT_DIR;

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$litespeed_static_dir = $lscwp_content_dir . '/' . $litespeed_data_folder;

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$log_path_prefix = $litespeed_static_dir . '/debug/';

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$log_file = $log_path_prefix . Debug2::FilePath( 'debug' );

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if ( file_exists( $log_path_prefix . 'index.php' ) && file_exists( $log_file ) ) {

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// phpcs:ignore WordPress.PHP.DevelopmentFunctions.error_log_error_log

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error_log(gmdate('m/d/y H:i:s') . ' - OC - ' . $text . PHP_EOL, 3, $log_file);

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}

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}

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/**

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* Get `Store Transients` setting value.

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*

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* @since 1.8.3

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* @access public

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*

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* @param string $group Group name.

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* @return bool

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*/

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public function store_transients( $group ) {

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return $this->_cfg_transients && $this->_is_transients_group( $group );

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}

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/**

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* Check if the group belongs to transients or not.

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*

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* @since 1.8.3

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* @access private

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*

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* @param string $group Group name.

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* @return bool

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*/

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private function _is_transients_group( $group ) {

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return in_array( $group, [ 'transient', 'site-transient' ], true );

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}

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/**

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* Update WP object cache file config.

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*

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* @since 1.8

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* @access public

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*

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* @param array $options Options to apply after update.

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* @return void

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*/

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public function update_file( $options ) {

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$changed = false;

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// NOTE: When included in oc.php, `LSCWP_DIR` will show undefined, so this must be assigned/generated when used.

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$_oc_ori_file = LSCWP_DIR . 'lib/object-cache.php';

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$_oc_wp_file = WP_CONTENT_DIR . '/object-cache.php';

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// Update cls file.

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if ( ! file_exists( $_oc_wp_file ) || md5_file( $_oc_wp_file ) !== md5_file( $_oc_ori_file ) ) {

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$this->debug_oc( 'copying object-cache.php file to ' . $_oc_wp_file );

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copy( $_oc_ori_file, $_oc_wp_file );

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$changed = true;

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}

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/**

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* Clear object cache.

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*/

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if ( $changed ) {

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$this->_reconnect( $options );

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}

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}

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/**

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* Remove object cache file.

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*

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* @since 1.8.2

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* @access public

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*

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* @return void

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*/

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public function del_file() {

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// NOTE: When included in oc.php, `LSCWP_DIR` will show undefined, so this must be assigned/generated when used.

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$_oc_ori_file = LSCWP_DIR . 'lib/object-cache.php';

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$_oc_wp_file = WP_CONTENT_DIR . '/object-cache.php';

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if ( file_exists( $_oc_wp_file ) && md5_file( $_oc_wp_file ) === md5_file( $_oc_ori_file ) ) {

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$this->debug_oc( 'removing ' . $_oc_wp_file );

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wp_delete_file( $_oc_wp_file );

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}

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}

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/**

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* Try to build connection.

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*

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* @since 1.8

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* @access public

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*

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* @return bool|null False on failure, true on success, null if unsupported.

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*/

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public function test_connection() {

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return $this->_connect();

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}

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/**

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* Force to connect with this setting.

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*

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* @since 1.8

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* @access private

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*

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* @param array $cfg Reconnect configuration.

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* @return void

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*/

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private function _reconnect( $cfg ) {

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$this->debug_oc( 'Reconnecting' );

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if ( isset( $this->_conn ) ) {

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// error_log( 'Object: Quitting existing connection!' );

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$this->debug_oc( 'Quitting existing connection' );

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$this->flush();

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$this->_conn = null;

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$this->cls( false, true );

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}

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$cls = $this->cls( false, false, $cfg );

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$cls->_connect();

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if ( isset( $cls->_conn ) ) {

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$cls->flush();

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}

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}

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/**

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* Connect to Memcached/Redis server.

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*

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* @since 1.8

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* @access private

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*

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* @return bool|null False on failure, true on success, null if driver missing.

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*/

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private function _connect() {

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if ( isset( $this->_conn ) ) {

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// error_log( 'Object: _connected' );

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return true;

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}

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if ( ! class_exists( $this->_oc_driver ) || ! $this->_cfg_host ) {

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$this->debug_oc( '_oc_driver cls non existed or _cfg_host missed: ' . $this->_oc_driver . ' [_cfg_host] ' . $this->_cfg_host . ':' . $this->_cfg_port );

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return null;

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}

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if ( defined( 'LITESPEED_OC_FAILURE' ) ) {

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$this->debug_oc( 'LITESPEED_OC_FAILURE const defined' );

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return false;

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}

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$this->debug_oc( 'Init ' . $this->_oc_driver . ' connection to ' . $this->_cfg_host . ':' . $this->_cfg_port );

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$failed = false;

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/**

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