Autoloader.php — Admin Columns 3.4.1

codepress-admin-columns / classes / Autoloader.php

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Autoloader.php

149 lines

1	<?php
2
3	namespace AC;
4
5	use FilesystemIterator;
6
7	class Autoloader {
8
9	/**
10	* @var self;
11	*/
12	protected static $instance;
13
14	/**
15	* Register prefixes and their path
16	* @var string[]
17	*/
18	protected $prefixes;
19
20	protected function __construct() {
21	$this->prefixes = array();
22
23	spl_autoload_register( array( $this, 'autoload' ) );
24	}
25
26	public static function instance() {
27	if ( null === self::$instance ) {
28	self::$instance = new self();
29	}
30
31	return self::$instance;
32	}
33
34	/**
35	* Register a prefix that should autoload
36	*
37	* @param $prefix string Unique prefix to this set of classes
38	* @param $dir string Path to directory where classes are stored
39	*
40	* @return $this
41	*/
42	public function register_prefix( $prefix, $dir ) {
43	$this->prefixes[ $prefix ] = trailingslashit( $dir );
44
45	// make sure that more specific prefixes are checked first
46	krsort( $this->prefixes );
47
48	return $this;
49	}
50
51	/**
52	* @param $class
53	*
54	* @return false\|string
55	*/
56	protected function get_prefix( $class ) {
57	foreach ( array_keys( $this->prefixes ) as $prefix ) {
58	if ( 0 === strpos( $class, $prefix ) ) {
59	return $prefix;
60	}
61	}
62
63	return false;
64	}
65
66	/**
67	* @param $prefix
68	*
69	* @return false\|string
70	*/
71	protected function get_path( $prefix ) {
72	if ( ! isset( $this->prefixes[ $prefix ] ) ) {
73	return false;
74	}
75
76	return $this->prefixes[ $prefix ];
77	}
78
79	/**
80	* Get the path from a given namespace that has a registered prefix
81	*
82	* @param string $namespace
83	*
84	* @return false\|string
85	*/
86	protected function get_path_from_namespace( $namespace ) {
87	$prefix = $this->get_prefix( $namespace );
88
89	if ( ! $prefix ) {
90	return false;
91	}
92
93	$path = $this->get_path( $prefix ) . substr( $namespace, strlen( $prefix ) );
94	$path = str_replace( '\\', '/', $path );
95
96	return $path;
97	}
98
99	/**
100	* @param string $class
101	*
102	* @return bool
103	*/
104	public function autoload( $class ) {
105	$path = $this->get_path_from_namespace( $class );
106	$file = realpath( $path . '.php' );
107
108	if ( ! $file ) {
109	return false;
110	}
111
112	require_once $file;
113
114	return true;
115	}
116
117	/**
118	* Get list of all auto-loadable class names from a directory
119	*
120	* @param $namespace
121	*
122	* @return array
123	*/
124	public function get_class_names_from_dir( $namespace ) {
125	$path = $this->get_path_from_namespace( $namespace );
126	$path = realpath( $path );
127
128	if ( ! $path ) {
129	return array();
130	}
131
132	$iterator = new FilesystemIterator( $path, FilesystemIterator::SKIP_DOTS );
133	$classes = array();
134
135	/* @var \DirectoryIterator $leaf */
136	foreach ( $iterator as $leaf ) {
137	// Exclude system files
138	if ( 0 === strpos( $leaf->getBasename(), '.' ) ) {
139	continue;
140	}
141
142	if ( 'php' === $leaf->getExtension() ) {
143	$classes[] = $namespace . '\\' . pathinfo( $leaf->getBasename(), PATHINFO_FILENAME );
144	}
145	}
146
147	return $classes;
148	}
149	}