wp-optimize / vendor / matthiasmullie / path-converter / src / Converter.php

Converter.php in WP-Optimize – Cache, Compress images, Minify & Clean database to boost page speed & performance 3.2.3, at vendor/matthiasmullie/path-converter/src/Converter.php

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1	<?php
2
3	namespace MatthiasMullie\PathConverter;
4
5	/**
6	* Convert paths relative from 1 file to another.
7	*
8	* E.g.
9	* ../../images/icon.jpg relative to /css/imports/icons.css
10	* becomes
11	* ../images/icon.jpg relative to /css/minified.css
12	*
13	* Please report bugs on https://github.com/matthiasmullie/path-converter/issues
14	*
15	* @author Matthias Mullie <[email protected]>
16	* @copyright Copyright (c) 2015, Matthias Mullie. All rights reserved
17	* @license MIT License
18	*/
19	class Converter implements ConverterInterface
20	{
21	/**
22	* @var string
23	*/
24	protected $from;
25
26	/**
27	* @var string
28	*/
29	protected $to;
30
31	/**
32	* @param string $from The original base path (directory, not file!)
33	* @param string $to The new base path (directory, not file!)
34	* @param string $root Root directory (defaults to `getcwd`)
35	*/
36	public function __construct($from, $to, $root = '')
37	{
38	$shared = $this->shared($from, $to);
39	if ($shared === '') {
40	// when both paths have nothing in common, one of them is probably
41	// absolute while the other is relative
42	$root = $root ?: getcwd();
43	$from = strpos($from, $root) === 0 ? $from : preg_replace('/\/+/', '/', $root.'/'.$from);
44	$to = strpos($to, $root) === 0 ? $to : preg_replace('/\/+/', '/', $root.'/'.$to);
45
46	// or traveling the tree via `..`
47	// attempt to resolve path, or assume it's fine if it doesn't exist
48	$from = @realpath($from) ?: $from;
49	$to = @realpath($to) ?: $to;
50	}
51
52	$from = $this->dirname($from);
53	$to = $this->dirname($to);
54
55	$from = $this->normalize($from);
56	$to = $this->normalize($to);
57
58	$this->from = $from;
59	$this->to = $to;
60	}
61
62	/**
63	* Normalize path.
64	*
65	* @param string $path
66	*
67	* @return string
68	*/
69	protected function normalize($path)
70	{
71	// deal with different operating systems' directory structure
72	$path = rtrim(str_replace(DIRECTORY_SEPARATOR, '/', $path), '/');
73
74	// remove leading current directory.
75	if (substr($path, 0, 2) === './') {
76	$path = substr($path, 2);
77	}
78
79	// remove references to current directory in the path.
80	$path = str_replace('/./', '/', $path);
81
82	/*
83	* Example:
84	* /home/forkcms/frontend/cache/compiled_templates/../../core/layout/css/../images/img.gif
85	* to
86	* /home/forkcms/frontend/core/layout/images/img.gif
87	*/
88	do {
89	$path = preg_replace('/[^\/]+(?<!\.\.)\/\.\.\//', '', $path, -1, $count);
90	} while ($count);
91
92	return $path;
93	}
94
95	/**
96	* Figure out the shared path of 2 locations.
97	*
98	* Example:
99	* /home/forkcms/frontend/core/layout/images/img.gif
100	* and
101	* /home/forkcms/frontend/cache/minified_css
102	* share
103	* /home/forkcms/frontend
104	*
105	* @param string $path1
106	* @param string $path2
107	*
108	* @return string
109	*/
110	protected function shared($path1, $path2)
111	{
112	// $path could theoretically be empty (e.g. no path is given), in which
113	// case it shouldn't expand to array(''), which would compare to one's
114	// root /
115	$path1 = $path1 ? explode('/', $path1) : array();
116	$path2 = $path2 ? explode('/', $path2) : array();
117
118	$shared = array();
119
120	// compare paths & strip identical ancestors
121	foreach ($path1 as $i => $chunk) {
122	if (isset($path2[$i]) && $path1[$i] == $path2[$i]) {
123	$shared[] = $chunk;
124	} else {
125	break;
126	}
127	}
128
129	return implode('/', $shared);
130	}
131
132	/**
133	* Convert paths relative from 1 file to another.
134	*
135	* E.g.
136	* ../images/img.gif relative to /home/forkcms/frontend/core/layout/css
137	* should become:
138	* ../../core/layout/images/img.gif relative to
139	* /home/forkcms/frontend/cache/minified_css
140	*
141	* @param string $path The relative path that needs to be converted
142	*
143	* @return string The new relative path
144	*/
145	public function convert($path)
146	{
147	// quit early if conversion makes no sense
148	if ($this->from === $this->to) {
149	return $path;
150	}
151
152	$path = $this->normalize($path);
153	// if we're not dealing with a relative path, just return absolute
154	if (strpos($path, '/') === 0) {
155	return $path;
156	}
157
158	// normalize paths
159	$path = $this->normalize($this->from.'/'.$path);
160
161	// strip shared ancestor paths
162	$shared = $this->shared($path, $this->to);
163	$path = mb_substr($path, mb_strlen($shared));
164	$to = mb_substr($this->to, mb_strlen($shared));
165
166	// add .. for every directory that needs to be traversed to new path
167	$to = str_repeat('../', count(array_filter(explode('/', $to))));
168
169	return $to.ltrim($path, '/');
170	}
171
172	/**
173	* Attempt to get the directory name from a path.
174	*
175	* @param string $path
176	*
177	* @return string
178	*/
179	protected function dirname($path)
180	{
181	if (@is_file($path)) {
182	return dirname($path);
183	}
184
185	if (@is_dir($path)) {
186	return rtrim($path, '/');
187	}
188
189	// no known file/dir, start making assumptions
190
191	// ends in / = dir
192	if (mb_substr($path, -1) === '/') {
193	return rtrim($path, '/');
194	}
195
196	// has a dot in the name, likely a file
197	if (preg_match('/.\..$/', basename($path)) !== 0) {
198	return dirname($path);
199	}
200
201	// you're on your own here!
202	return $path;
203	}
204	}
205