Cache.php — Advanced Access Manager – Access Governance for WordPress 4.9

advanced-access-manager / Application / Core / Cache.php

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Cache.php

142 lines

1	<?php
2
3	/**
4	* ======================================================================
5	* LICENSE: This file is subject to the terms and conditions defined in *
6	* file 'license.txt', which is part of this source code package. *
7	* ======================================================================
8	*/
9
10	/**
11	* AAM Core Cache
12	*
13	* @package AAM
14	* @author Vasyl Martyniuk <vasyl@vasyltech.com>
15	*/
16	class AAM_Core_Cache {
17
18	/**
19	* DB Cache option
20	*/
21	const CACHE_OPTION = 'cache';
22
23	/**
24	* Core config
25	*
26	* @var array
27	*
28	* @access protected
29	*/
30	protected static $cache = false;
31
32	/**
33	* Update cache flag
34	*
35	* @var boolean
36	*
37	* @access protected
38	*/
39	protected static $updated = false;
40
41	/**
42	* Get cached option
43	*
44	* @param string $option
45	*
46	* @return mixed
47	*
48	* @access public
49	*/
50	public static function get($option, $default = null) {
51	return (isset(self::$cache[$option]) ? self::$cache[$option] : $default);
52	}
53
54	/**
55	* Set cache option
56	*
57	* @param string $subject
58	* @param string $option
59	* @param mixed $data
60	*
61	* @return void
62	*
63	* @access public
64	*/
65	public static function set($subject, $option, $data) {
66	if (!isset(self::$cache[$option]) \|\| (self::$cache[$option] != $data)) {
67	self::$cache[$option] = $data;
68	self::$updated = true;
69	}
70	}
71
72	/**
73	*
74	* @param type $option
75	* @return type
76	*/
77	public static function has($option) {
78	return (isset(self::$cache[$option]));
79	}
80
81	/**
82	* Clear cache
83	*
84	* @return void
85	*
86	* @access public
87	* @global WPDB $wpdb
88	*/
89	public static function clear($user = null) {
90	global $wpdb;
91
92	if (is_null($user)) {
93	//clear visitor cache
94	$oquery = "DELETE FROM {$wpdb->options} WHERE `option_name` = %s";
95	$wpdb->query($wpdb->prepare($oquery, 'aam_visitor_cache' ));
96
97	$mquery = "DELETE FROM {$wpdb->usermeta} WHERE `meta_key` = %s";
98	$wpdb->query($wpdb->prepare($mquery, $wpdb->prefix . 'aam_cache' ));
99	} else {
100	$query = "DELETE FROM {$wpdb->usermeta} WHERE (`user_id` = %d) AND ";
101	$query .= "`meta_key` = %s";
102	$wpdb->query($wpdb->prepare($query, $user, $wpdb->prefix . 'aam_cache'));
103	}
104
105	self::$cache = false;
106
107	//clear updated flag
108	self::$updated = false;
109	}
110
111	/**
112	* Save cache
113	*
114	* Save aam cache but only if changes deleted
115	*
116	* @return void
117	*
118	* @access public
119	*/
120	public static function save() {
121	if (self::$updated) {
122	AAM::getUser()->updateOption(self::$cache, self::CACHE_OPTION);
123	}
124	}
125
126	/**
127	* Bootstrap cache
128	*
129	* Do not load cache if user is on AAM page
130	*
131	* @return void
132	*
133	* @access public
134	*/
135	public static function bootstrap() {
136	if (!AAM::isAAM()) {
137	self::$cache = AAM::getUser()->readOption(self::CACHE_OPTION);
138	add_action('shutdown', 'AAM_Core_Cache::save');
139	}
140	}
141
142	}