<?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;

use Symfony\Component\Finder\Exception\AccessDeniedException;
use Symfony\Component\Finder\SplFileInfo;

class RecursiveDirectoryIterator extends \RecursiveDirectoryIterator
{
    private $ignoreUnreadableDirs;

    private $rewindable;

    private $rootPath;
    private $subPath;
    private $directorySeparator = '/';

    public function __construct($path, $flags, $ignoreUnreadableDirs = false)
    {
        if ($flags & (self::CURRENT_AS_PATHNAME | self::CURRENT_AS_SELF)) {
            throw new \RuntimeException('This iterator only support returning current as fileinfo.');
        }

        parent::__construct($path, $flags);
        $this->ignoreUnreadableDirs = $ignoreUnreadableDirs;
        $this->rootPath = $path;
        if ('/' !== DIRECTORY_SEPARATOR && !($flags & self::UNIX_PATHS)) {
            $this->directorySeparator = DIRECTORY_SEPARATOR;
        }
    }

    public function current()
    {

        if (null === $subPathname = $this->subPath) {
            $subPathname = $this->subPath = (string) $this->getSubPath();
        }
        if ('' !== $subPathname) {
            $subPathname .= $this->directorySeparator;
        }
        $subPathname .= $this->getFilename();

        return new SplFileInfo($this->rootPath.$this->directorySeparator.$subPathname, $this->subPath, $subPathname);
    }

    public function getChildren()
    {
        try {
            $children = parent::getChildren();

            if ($children instanceof self) {
                $children->ignoreUnreadableDirs = $this->ignoreUnreadableDirs;

                $children->rewindable = &$this->rewindable;
                $children->rootPath = $this->rootPath;
            }

            return $children;
        } catch (\UnexpectedValueException $e) {
            if ($this->ignoreUnreadableDirs) {
                return new \RecursiveArrayIterator(array());
            } else {
                throw new AccessDeniedException($e->getMessage(), $e->getCode(), $e);
            }
        }
    }

    public function rewind()
    {
        if (false === $this->isRewindable()) {
            return;
        }

        if (\PHP_VERSION_ID < 50523 || \PHP_VERSION_ID >= 50600 && \PHP_VERSION_ID < 50607) {
            parent::next();
        }

        parent::rewind();
    }

    public function isRewindable()
    {
        if (null !== $this->rewindable) {
            return $this->rewindable;
        }

        if ('' === $this->getPath()) {
            return $this->rewindable = false;
        }

        if (false !== $stream = @opendir($this->getPath())) {
            $infos = stream_get_meta_data($stream);
            closedir($stream);

            if ($infos['seekable']) {
                return $this->rewindable = true;
            }
        }

        return $this->rewindable = false;
    }
}
