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<?php
/*
 * This file is part of php-file-iterator.
 *
 * (c) Sebastian Bergmann <sebastian@phpunit.de>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace SebastianBergmann\FileIterator;

class Iterator extends \FilterIterator
{
    const PREFIX = 0;
    const SUFFIX = 1;

/**
     * @var string
     */
    private $basePath;

/**
     * @var array
     */
    private $suffixes = [];

/**
     * @var array
     */
    private $prefixes = [];

/**
     * @var array
     */
    private $exclude = [];

/**
     * @param string    $basePath
     * @param \Iterator $iterator
     * @param array     $suffixes
     * @param array     $prefixes
     * @param array     $exclude
     */
    public function __construct(string $basePath, \Iterator $iterator, array $suffixes = [], array $prefixes = [], array $exclude = [])
    {
        $this->basePath = \realpath($basePath);
        $this->prefixes = $prefixes;
        $this->suffixes = $suffixes;
        $this->exclude  = \array_filter(\array_map('realpath', $exclude));

parent::__construct($iterator);
    }

/**
     * @return bool
     */
    #[\ReturnTypeWillChange]
    public function accept()
    {
        $current  = $this->getInnerIterator()->current();
        $filename = $current->getFilename();
        $realPath = $current->getRealPath();

return $this->acceptPath($realPath) &&
               $this->acceptPrefix($filename) &&
               $this->acceptSuffix($filename);
    }

private function acceptPath(string $path): bool
    {
        // Filter files in hidden directories by checking path that is relative to the base path.
        if (\preg_match('=/\.[^/]*/=', \str_replace($this->basePath, '', $path))) {
            return false;
        }

foreach ($this->exclude as $exclude) {
            if (\strpos($path, $exclude) === 0) {
                return false;
            }
        }

return true;
    }

private function acceptPrefix(string $filename): bool
    {
        return $this->acceptSubString($filename, $this->prefixes, self::PREFIX);
    }

private function acceptSuffix(string $filename): bool
    {
        return $this->acceptSubString($filename, $this->suffixes, self::SUFFIX);
    }

private function acceptSubString(string $filename, array $subStrings, int $type): bool
    {
        if (empty($subStrings)) {
            return true;
        }

$matched = false;

foreach ($subStrings as $string) {
            if (($type === self::PREFIX && \strpos($filename, $string) === 0) ||
                ($type === self::SUFFIX &&
                 \substr($filename, -1 * \strlen($string)) === $string)) {
                $matched = true;

break;
            }
        }

return $matched;
    }
}