<?php

declare(strict_types=1);

namespace League\Flysystem;

class WhitespacePathNormalizer implements PathNormalizer

{

public function normalizePath(string $path): string

{

$path = str_replace('\\', '/', $path);

$this->rejectFunkyWhiteSpace($path);

return $this->normalizeRelativePath($path);

}

private function rejectFunkyWhiteSpace(string $path): void

{

if (preg_match('#\p{C}+#u', $path)) {

throw CorruptedPathDetected::forPath($path);

}

}

private function normalizeRelativePath(string $path): string

{

$parts = [];

foreach (explode('/', $path) as $part) {

switch ($part) {

case '':

case '.':

break;

case '..':

if (empty($parts)) {

throw PathTraversalDetected::forPath($path);

}

array_pop($parts);

break;

default:

$parts[] = $part;

break;

}

}

return implode('/', $parts);

}

}