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<?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;
/**
* SortableIterator applies a sort on a given Iterator.
*
* @author Fabien Potencier <fabien@symfony.com>
*/
class SortableIterator implements \IteratorAggregate
{
const SORT_BY_NONE = 0;
const SORT_BY_NAME = 1;
const SORT_BY_TYPE = 2;
const SORT_BY_ACCESSED_TIME = 3;
const SORT_BY_CHANGED_TIME = 4;
const SORT_BY_MODIFIED_TIME = 5;
const SORT_BY_NAME_NATURAL = 6;
private $iterator;
private $sort;
/**
* @param \Traversable $iterator The Iterator to filter
* @param int|callable $sort The sort type (SORT_BY_NAME, SORT_BY_TYPE, or a PHP callback)
*
* @throws \InvalidArgumentException
*/
public function __construct(\Traversable $iterator, $sort, bool $reverseOrder = false)
{
$this->iterator = $iterator;
$order = $reverseOrder ? -1 : 1;
if (self::SORT_BY_NAME === $sort) {
$this->sort = function ($a, $b) use ($order) {
return $order * strcmp($a->getRealpath() ?: $a->getPathname(), $b->getRealpath() ?: $b->getPathname());
};
} elseif (self::SORT_BY_NAME_NATURAL === $sort) {
$this->sort = function ($a, $b) use ($order) {
return $order * strnatcmp($a->getRealPath() ?: $a->getPathname(), $b->getRealPath() ?: $b->getPathname());
};
} elseif (self::SORT_BY_TYPE === $sort) {
$this->sort = function ($a, $b) use ($order) {
if ($a->isDir() && $b->isFile()) {
return -$order;
} elseif ($a->isFile() && $b->isDir()) {
return $order;
}
return $order * strcmp($a->getRealpath() ?: $a->getPathname(), $b->getRealpath() ?: $b->getPathname());
};
} elseif (self::SORT_BY_ACCESSED_TIME === $sort) {
$this->sort = function ($a, $b) use ($order) {
return $order * ($a->getATime() - $b->getATime());
};
} elseif (self::SORT_BY_CHANGED_TIME === $sort) {
$this->sort = function ($a, $b) use ($order) {
return $order * ($a->getCTime() - $b->getCTime());
};
} elseif (self::SORT_BY_MODIFIED_TIME === $sort) {
$this->sort = function ($a, $b) use ($order) {
return $order * ($a->getMTime() - $b->getMTime());
};
} elseif (self::SORT_BY_NONE === $sort) {
$this->sort = $order;
} elseif (\is_callable($sort)) {
$this->sort = $reverseOrder ? function ($a, $b) use ($sort) { return -$sort($a, $b); }
: $sort;
} else {
throw new \InvalidArgumentException('The SortableIterator takes a PHP callable or a valid built-in sort algorithm as an argument.');
}
}
public function getIterator()
{
if (1 === $this->sort) {
return $this->iterator;
}
$array = iterator_to_array($this->iterator, true);
if (-1 === $this->sort) {
$array = array_reverse($array);
} else {
uasort($array, $this->sort);
}
return new \ArrayIterator($array);
}
}
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