image-source-control-isc / includes / class-autoloader.php

class-autoloader.php in Image Source Control Lite – Show Image Credits and Captions trunk, at includes/class-autoloader.php

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1	<?php
2	/**
3	* The class is responsible for locating and loading the autoloader file used in the plugin.
4	*/
5
6	namespace ISC;
7
8	/**
9	* Autoloader.
10	*/
11	class Autoloader {
12
13	/**
14	* Hold autoloader.
15	*
16	* @var mixed
17	*/
18	private $autoloader;
19
20	/**
21	* Main instance
22	*
23	* Ensure only one instance is loaded or can be loaded.
24	*
25	* @return Autoloader
26	*/
27	public static function get(): Autoloader {
28	static $instance;
29
30	if ( null === $instance ) {
31	$instance = new Autoloader();
32	}
33
34	return $instance;
35	}
36
37	/**
38	* Get hold autoloader.
39	*
40	* @return mixed
41	*/
42	public function get_autoloader() {
43	return $this->autoloader;
44	}
45
46	/**
47	* Get plugin directory.
48	*
49	* @return string
50	*/
51	public function get_directory(): string {
52	return ISCPATH;
53	}
54
55	/**
56	* Runs this initializer.
57	*
58	* @return void
59	*/
60	public function initialize(): void {
61	$this->autoloader = require $this->locate();
62	}
63
64	/**
65	* Locate the autoload file
66	*
67	* This function searches for the autoload file in the packages directory and vendor directory.
68	*
69	* @return bool\|string
70	*/
71	private function locate() {
72	$directory = $this->get_directory();
73	$lib = $directory . 'lib/autoload.php';
74	$vendors = $directory . 'vendor/autoload.php';
75
76	if ( is_readable( $lib ) && ( ! self::is_test() ) ) {
77	return $lib;
78	}
79
80	if ( is_readable( $vendors ) ) {
81	return $vendors;
82	}
83
84	return false;
85	}
86
87	/**
88	* Check if this is a test run.
89	*
90	* @return bool
91	*/
92	public static function is_test(): bool {
93	return ( isset( $_SERVER['TEST_SITE_USER_AGENT'] ) && $_SERVER['TEST_SITE_USER_AGENT'] === 'ISC_Test' ); // wp-browser unit test
94	}
95	}