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- 06.01.2017
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SortableIterator.php
01 <?php
02
03 /*
04 * This file is part of the Symfony package.
05 *
06 * (c) Fabien Potencier <fabien@symfony.com>
07 *
08 * For the full copyright and license information, please view the LICENSE
09 * file that was distributed with this source code.
10 */
11
12 namespace Symfony\Component\Finder\Iterator;
13
14 /**
15 * SortableIterator applies a sort on a given Iterator.
16 *
17 * @author Fabien Potencier <fabien@symfony.com>
18 */
19 class SortableIterator implements \IteratorAggregate
20 {
21 const SORT_BY_NAME = 1;
22 const SORT_BY_TYPE = 2;
23 const SORT_BY_ACCESSED_TIME = 3;
24 const SORT_BY_CHANGED_TIME = 4;
25 const SORT_BY_MODIFIED_TIME = 5;
26
27 private $iterator;
28 private $sort;
29
30 /**
31 * Constructor.
32 *
33 * @param \Traversable $iterator The Iterator to filter
34 * @param int|callable $sort The sort type (SORT_BY_NAME, SORT_BY_TYPE, or a PHP callback)
35 *
36 * @throws \InvalidArgumentException
37 */
38 public function __construct(\Traversable $iterator, $sort)
39 {
40 $this->iterator = $iterator;
41
42 if (self::SORT_BY_NAME === $sort) {
43 $this->sort = function ($a, $b) {
44 return strcmp($a->getRealpath() ?: $a->getPathname(), $b->getRealpath() ?: $b->getPathname());
45 };
46 } elseif (self::SORT_BY_TYPE === $sort) {
47 $this->sort = function ($a, $b) {
48 if ($a->isDir() && $b->isFile()) {
49 return -1;
50 } elseif ($a->isFile() && $b->isDir()) {
51 return 1;
52 }
53
54 return strcmp($a->getRealpath() ?: $a->getPathname(), $b->getRealpath() ?: $b->getPathname());
55 };
56 } elseif (self::SORT_BY_ACCESSED_TIME === $sort) {
57 $this->sort = function ($a, $b) {
58 return $a->getATime() - $b->getATime();
59 };
60 } elseif (self::SORT_BY_CHANGED_TIME === $sort) {
61 $this->sort = function ($a, $b) {
62 return $a->getCTime() - $b->getCTime();
63 };
64 } elseif (self::SORT_BY_MODIFIED_TIME === $sort) {
65 $this->sort = function ($a, $b) {
66 return $a->getMTime() - $b->getMTime();
67 };
68 } elseif (is_callable($sort)) {
69 $this->sort = $sort;
70 } else {
71 throw new \InvalidArgumentException('The SortableIterator takes a PHP callable or a valid built-in sort algorithm as an argument.');
72 }
73 }
74
75 public function getIterator()
76 {
77 $array = iterator_to_array($this->iterator, true);
78 uasort($array, $this->sort);
79
80 return new \ArrayIterator($array);
81 }
82 }
83