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DariusIII
108 lines
3.1 KiB
PHP
108 lines
3.1 KiB
PHP
<?php
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declare(strict_types=1);
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namespace App\Support;
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use Illuminate\Support\Str;
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use Normalizer;
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final class FilenameSanitizer
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{
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private const int MAX_FILENAME_LENGTH = 200;
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/**
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* @var list<string>
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*/
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private const array UNICODE_PATH_SEPARATORS = [
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'⁄',
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'∕',
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'⧸',
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'／',
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'＼',
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'﹨',
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'⧵',
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'⟋',
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'⟍',
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'╱',
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'╲',
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];
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public static function sanitize(?string $name, string $fallback = 'download'): string
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{
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$sanitized = self::normalize($name);
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if ($sanitized === '') {
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return self::safeFallback($fallback);
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}
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return self::finalize($sanitized, $fallback);
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}
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public static function asciiFallback(?string $name, string $fallback = 'download'): string
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{
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$sanitized = self::sanitize($name, $fallback);
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$ascii = Str::ascii($sanitized);
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$ascii = preg_replace('/[^A-Za-z0-9._-]+/', '_', $ascii) ?? $ascii;
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$ascii = preg_replace('/_+/', '_', $ascii) ?? $ascii;
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return self::finalize($ascii, $fallback);
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}
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private static function normalize(?string $name): string
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{
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$normalized = trim((string) $name);
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if ($normalized === '') {
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return '';
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}
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if (class_exists(Normalizer::class)) {
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$candidate = Normalizer::normalize($normalized, Normalizer::FORM_KC);
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if (is_string($candidate)) {
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$normalized = $candidate;
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}
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}
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$normalized = str_replace(self::UNICODE_PATH_SEPARATORS, '/', $normalized);
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$normalized = preg_replace('/[\x00-\x1F\x7F]+/u', '', $normalized) ?? $normalized;
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$normalized = str_replace(['/', '\\', ':', '*', '?', '"', '<', '>', '|'], '_', $normalized);
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$normalized = preg_replace('/[\s,]+/u', '_', $normalized) ?? $normalized;
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$normalized = preg_replace('/_+/', '_', $normalized) ?? $normalized;
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return self::trimFilename($normalized);
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}
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private static function finalize(string $name, string $fallback): string
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{
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$name = mb_substr($name, 0, self::MAX_FILENAME_LENGTH);
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$name = self::trimFilename($name);
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if ($name === '' || $name === '.' || $name === '..') {
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return self::safeFallback($fallback);
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}
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return $name;
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}
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private static function safeFallback(string $fallback): string
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{
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$safeFallback = Str::ascii($fallback);
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$safeFallback = preg_replace('/[^A-Za-z0-9._-]+/', '_', $safeFallback) ?? $safeFallback;
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$safeFallback = preg_replace('/_+/', '_', $safeFallback) ?? $safeFallback;
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$safeFallback = mb_substr($safeFallback, 0, self::MAX_FILENAME_LENGTH);
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$safeFallback = self::trimFilename($safeFallback);
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if ($safeFallback === '' || $safeFallback === '.' || $safeFallback === '..') {
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return 'download';
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}
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return $safeFallback;
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}
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private static function trimFilename(string $name): string
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{
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return ltrim(trim($name, " \t\n\r\0\x0B._-"), '.');
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}
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}
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