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

ActionScheduler_Versions.php in Image Optimizer – Compress Images and Convert to WebP or AVIF 1.7.6, 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	* ActionScheduler_Versions instance.
9	*
10	* @var ActionScheduler_Versions
11	*/
12	private static $instance = null;
13
14	/**
15	* Versions.
16	*
17	* @var array<string, callable>
18	*/
19	private $versions = array();
20
21	/**
22	* Register version's callback.
23	*
24	* @param string $version_string Action Scheduler version.
25	* @param callable $initialization_callback Callback to initialize the version.
26	*/
27	public function register( $version_string, $initialization_callback ) {
28	if ( isset( $this->versions[ $version_string ] ) ) {
29	return false;
30	}
31	$this->versions[ $version_string ] = $initialization_callback;
32	return true;
33	}
34
35	/**
36	* Get all versions.
37	*/
38	public function get_versions() {
39	return $this->versions;
40	}
41
42	/**
43	* Get latest version registered.
44	*/
45	public function latest_version() {
46	$keys = array_keys( $this->versions );
47	if ( empty( $keys ) ) {
48	return false;
49	}
50	uasort( $keys, 'version_compare' );
51	return end( $keys );
52	}
53
54	/**
55	* Get callback for latest registered version.
56	*/
57	public function latest_version_callback() {
58	$latest = $this->latest_version();
59
60	if ( empty( $latest ) \|\| ! isset( $this->versions[ $latest ] ) ) {
61	return '__return_null';
62	}
63
64	return $this->versions[ $latest ];
65	}
66
67	/**
68	* Get instance.
69	*
70	* @return ActionScheduler_Versions
71	* @codeCoverageIgnore
72	*/
73	public static function instance() {
74	if ( empty( self::$instance ) ) {
75	self::$instance = new self();
76	}
77	return self::$instance;
78	}
79
80	/**
81	* Initialize.
82	*
83	* @codeCoverageIgnore
84	*/
85	public static function initialize_latest_version() {
86	$self = self::instance();
87	call_user_func( $self->latest_version_callback() );
88	}
89	}
90