<?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);
}
}