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<?php
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/*
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 * This file is part of the Symfony package.
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 *
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 * (c) Fabien Potencier <fabien@symfony.com>
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 *
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 * For the full copyright and license information, please view the LICENSE
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 * file that was distributed with this source code.
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 */
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namespace Symfony\Component\Finder\Iterator;
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/**
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 * SortableIterator applies a sort on a given Iterator.
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 *
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 * @author Fabien Potencier <fabien@symfony.com>
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 *
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 * @implements \IteratorAggregate<string, \SplFileInfo>
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 */
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class SortableIterator implements \IteratorAggregate
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{
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    public const SORT_BY_NONE = 0;
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    public const SORT_BY_NAME = 1;
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    public const SORT_BY_TYPE = 2;
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    public const SORT_BY_ACCESSED_TIME = 3;
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    public const SORT_BY_CHANGED_TIME = 4;
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    public const SORT_BY_MODIFIED_TIME = 5;
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    public const SORT_BY_NAME_NATURAL = 6;
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    public const SORT_BY_NAME_CASE_INSENSITIVE = 7;
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    public const SORT_BY_NAME_NATURAL_CASE_INSENSITIVE = 8;
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    public const SORT_BY_EXTENSION = 9;
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    public const SORT_BY_SIZE = 10;
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    /** @var \Traversable<string, \SplFileInfo> */
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    private \Traversable $iterator;
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    private \Closure|int $sort;
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    /**
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     * @param \Traversable<string, \SplFileInfo> $iterator
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     * @param int|callable                       $sort     The sort type (SORT_BY_NAME, SORT_BY_TYPE, or a PHP callback)
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     *
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     * @throws \InvalidArgumentException
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     */
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    public function __construct(\Traversable $iterator, int|callable $sort, bool $reverseOrder = false)
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    {
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        $this->iterator = $iterator;
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        $order = $reverseOrder ? -1 : 1;
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        if (self::SORT_BY_NAME === $sort) {
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            $this->sort = static function (\SplFileInfo $a, \SplFileInfo $b) use ($order) {
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                return $order * strcmp($a->getRealPath() ?: $a->getPathname(), $b->getRealPath() ?: $b->getPathname());
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            };
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        } elseif (self::SORT_BY_NAME_NATURAL === $sort) {
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            $this->sort = static function (\SplFileInfo $a, \SplFileInfo $b) use ($order) {
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                return $order * strnatcmp($a->getRealPath() ?: $a->getPathname(), $b->getRealPath() ?: $b->getPathname());
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            };
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        } elseif (self::SORT_BY_NAME_CASE_INSENSITIVE === $sort) {
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            $this->sort = static function (\SplFileInfo $a, \SplFileInfo $b) use ($order) {
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                return $order * strcasecmp($a->getRealPath() ?: $a->getPathname(), $b->getRealPath() ?: $b->getPathname());
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            };
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        } elseif (self::SORT_BY_NAME_NATURAL_CASE_INSENSITIVE === $sort) {
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            $this->sort = static function (\SplFileInfo $a, \SplFileInfo $b) use ($order) {
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                return $order * strnatcasecmp($a->getRealPath() ?: $a->getPathname(), $b->getRealPath() ?: $b->getPathname());
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            };
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        } elseif (self::SORT_BY_TYPE === $sort) {
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            $this->sort = static function (\SplFileInfo $a, \SplFileInfo $b) use ($order) {
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                if ($a->isDir() && $b->isFile()) {
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                    return -$order;
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                } elseif ($a->isFile() && $b->isDir()) {
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                    return $order;
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                }
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                return $order * strcmp($a->getRealPath() ?: $a->getPathname(), $b->getRealPath() ?: $b->getPathname());
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            };
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        } elseif (self::SORT_BY_ACCESSED_TIME === $sort) {
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            $this->sort = static function (\SplFileInfo $a, \SplFileInfo $b) use ($order) {
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                return $order * ($a->getATime() - $b->getATime());
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            };
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        } elseif (self::SORT_BY_CHANGED_TIME === $sort) {
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            $this->sort = static function (\SplFileInfo $a, \SplFileInfo $b) use ($order) {
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                return $order * ($a->getCTime() - $b->getCTime());
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            };
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        } elseif (self::SORT_BY_MODIFIED_TIME === $sort) {
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            $this->sort = static function (\SplFileInfo $a, \SplFileInfo $b) use ($order) {
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                return $order * ($a->getMTime() - $b->getMTime());
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            };
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        } elseif (self::SORT_BY_EXTENSION === $sort) {
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            $this->sort = static function (\SplFileInfo $a, \SplFileInfo $b) use ($order) {
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                return $order * strnatcmp($a->getExtension(), $b->getExtension());
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            };
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        } elseif (self::SORT_BY_SIZE === $sort) {
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            $this->sort = static function (\SplFileInfo $a, \SplFileInfo $b) use ($order) {
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                return $order * ($a->getSize() - $b->getSize());
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            };
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        } elseif (self::SORT_BY_NONE === $sort) {
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            $this->sort = $order;
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        } elseif (\is_callable($sort)) {
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            $this->sort = $reverseOrder ? static function (\SplFileInfo $a, \SplFileInfo $b) use ($sort) { return -$sort($a, $b); } : $sort(...);
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        } else {
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            throw new \InvalidArgumentException('The SortableIterator takes a PHP callable or a valid built-in sort algorithm as an argument.');
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        }
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    }
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    public function getIterator(): \Traversable
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    {
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        if (1 === $this->sort) {
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            return $this->iterator;
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        }
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        $array = iterator_to_array($this->iterator, true);
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        if (-1 === $this->sort) {
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            $array = array_reverse($array);
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        } else {
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            uasort($array, $this->sort);
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        }
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        return new \ArrayIterator($array);
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    }
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}