-
-
Notifications
You must be signed in to change notification settings - Fork 57
/
MultiplePcreFilterIterator.php
111 lines (96 loc) · 3.02 KB
/
MultiplePcreFilterIterator.php
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\Finder\Iterator;
/**
* MultiplePcreFilterIterator filters files using patterns (regexps, globs or strings).
*
* @author Fabien Potencier <fabien@symfony.com>
*
* @template-covariant TKey
* @template-covariant TValue
*
* @extends \FilterIterator<TKey, TValue>
*/
abstract class MultiplePcreFilterIterator extends \FilterIterator
{
protected $matchRegexps = [];
protected $noMatchRegexps = [];
/**
* @param \Iterator $iterator The Iterator to filter
* @param string[] $matchPatterns An array of patterns that need to match
* @param string[] $noMatchPatterns An array of patterns that need to not match
*/
public function __construct(\Iterator $iterator, array $matchPatterns, array $noMatchPatterns)
{
foreach ($matchPatterns as $pattern) {
$this->matchRegexps[] = $this->toRegex($pattern);
}
foreach ($noMatchPatterns as $pattern) {
$this->noMatchRegexps[] = $this->toRegex($pattern);
}
parent::__construct($iterator);
}
/**
* Checks whether the string is accepted by the regex filters.
*
* If there is no regexps defined in the class, this method will accept the string.
* Such case can be handled by child classes before calling the method if they want to
* apply a different behavior.
*
* @return bool
*/
protected function isAccepted(string $string)
{
// should at least not match one rule to exclude
foreach ($this->noMatchRegexps as $regex) {
if (preg_match($regex, $string)) {
return false;
}
}
// should at least match one rule
if ($this->matchRegexps) {
foreach ($this->matchRegexps as $regex) {
if (preg_match($regex, $string)) {
return true;
}
}
return false;
}
// If there is no match rules, the file is accepted
return true;
}
/**
* Checks whether the string is a regex.
*
* @return bool
*/
protected function isRegex(string $str)
{
if (preg_match('/^(.{3,}?)[imsxuADU]*$/', $str, $m)) {
$start = substr($m[1], 0, 1);
$end = substr($m[1], -1);
if ($start === $end) {
return !preg_match('/[*?[:alnum:] \\\\]/', $start);
}
foreach ([['{', '}'], ['(', ')'], ['[', ']'], ['<', '>']] as $delimiters) {
if ($start === $delimiters[0] && $end === $delimiters[1]) {
return true;
}
}
}
return false;
}
/**
* Converts string into regexp.
*
* @return string
*/
abstract protected function toRegex(string $str);
}