image-optimization / vendor / woocommerce / action-scheduler / classes / ActionScheduler_Versions.php

ActionScheduler_Versions.php in Image Optimizer – Compress Images and Convert to WebP or AVIF 1.5.4, at vendor/woocommerce/action-scheduler/classes/ActionScheduler_Versions.php

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1	<?php
2
3	/**
4	* Class ActionScheduler_Versions
5	*/
6	class ActionScheduler_Versions {
7	/**
8	* @var ActionScheduler_Versions
9	*/
10	private static $instance = NULL;
11
12	/** @var array<string, callable> */
13	private $versions = array();
14
15	/**
16	* Register version's callback.
17	*
18	* @param string $version_string Action Scheduler version.
19	* @param callable $initialization_callback Callback to initialize the version.
20	*/
21	public function register( $version_string, $initialization_callback ) {
22	if ( isset($this->versions[$version_string]) ) {
23	return FALSE;
24	}
25	$this->versions[$version_string] = $initialization_callback;
26	return TRUE;
27	}
28
29	/**
30	* Get all versions.
31	*/
32	public function get_versions() {
33	return $this->versions;
34	}
35
36	/**
37	* Get latest version registered.
38	*/
39	public function latest_version() {
40	$keys = array_keys($this->versions);
41	if ( empty($keys) ) {
42	return false;
43	}
44	uasort( $keys, 'version_compare' );
45	return end($keys);
46	}
47
48	/**
49	* Get callback for latest registered version.
50	*/
51	public function latest_version_callback() {
52	$latest = $this->latest_version();
53	if ( empty($latest) \|\| !isset($this->versions[$latest]) ) {
54	return '__return_null';
55	}
56	return $this->versions[$latest];
57	}
58
59	/**
60	* @return ActionScheduler_Versions
61	* @codeCoverageIgnore
62	*/
63	public static function instance() {
64	if ( empty(self::$instance) ) {
65	self::$instance = new self();
66	}
67	return self::$instance;
68	}
69
70	/**
71	* @codeCoverageIgnore
72	*/
73	public static function initialize_latest_version() {
74	$self = self::instance();
75	call_user_func($self->latest_version_callback());
76	}
77	}
78