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Edit File: AsciiSlugger.php

<?php
namespace MailPoetVendor\Symfony\Component\String\Slugger;
if (!defined('ABSPATH')) exit;
use MailPoetVendor\Symfony\Component\String\AbstractUnicodeString;
use MailPoetVendor\Symfony\Component\String\UnicodeString;
use MailPoetVendor\Symfony\Contracts\Translation\LocaleAwareInterface;
if (!\interface_exists(LocaleAwareInterface::class)) {
 throw new \LogicException('You cannot use the "Symfony\\Component\\String\\Slugger\\AsciiSlugger" as the "symfony/translation-contracts" package is not installed. Try running "composer require symfony/translation-contracts".');
}
class AsciiSlugger implements SluggerInterface, LocaleAwareInterface
{
 private const LOCALE_TO_TRANSLITERATOR_ID = ['am' => 'Amharic-Latin', 'ar' => 'Arabic-Latin', 'az' => 'Azerbaijani-Latin', 'be' => 'Belarusian-Latin', 'bg' => 'Bulgarian-Latin', 'bn' => 'Bengali-Latin', 'de' => 'de-ASCII', 'el' => 'Greek-Latin', 'fa' => 'Persian-Latin', 'he' => 'Hebrew-Latin', 'hy' => 'Armenian-Latin', 'ka' => 'Georgian-Latin', 'kk' => 'Kazakh-Latin', 'ky' => 'Kirghiz-Latin', 'ko' => 'Korean-Latin', 'mk' => 'Macedonian-Latin', 'mn' => 'Mongolian-Latin', 'or' => 'Oriya-Latin', 'ps' => 'Pashto-Latin', 'ru' => 'Russian-Latin', 'sr' => 'Serbian-Latin', 'sr_Cyrl' => 'Serbian-Latin', 'th' => 'Thai-Latin', 'tk' => 'Turkmen-Latin', 'uk' => 'Ukrainian-Latin', 'uz' => 'Uzbek-Latin', 'zh' => 'Han-Latin'];
 private $defaultLocale;
 private $symbolsMap = ['en' => ['@' => 'at', '&' => 'and']];
 private $transliterators = [];
 public function __construct(?string $defaultLocale = null, $symbolsMap = null)
 {
 if (null !== $symbolsMap && !\is_array($symbolsMap) && !$symbolsMap instanceof \Closure) {
 throw new \TypeError(\sprintf('Argument 2 passed to "%s()" must be array, Closure or null, "%s" given.', __METHOD__, \gettype($symbolsMap)));
 }
 $this->defaultLocale = $defaultLocale;
 $this->symbolsMap = $symbolsMap ?? $this->symbolsMap;
 }
 public function setLocale($locale)
 {
 $this->defaultLocale = $locale;
 }
 public function getLocale()
 {
 return $this->defaultLocale;
 }
 public function slug(string $string, string $separator = '-', ?string $locale = null) : AbstractUnicodeString
 {
 $locale = $locale ?? $this->defaultLocale;
 $transliterator = [];
 if ($locale && ('de' === $locale || 0 === \strpos($locale, 'de_'))) {
 // Use the shortcut for German in UnicodeString::ascii() if possible (faster and no requirement on intl)
 $transliterator = ['de-ASCII'];
 } elseif (\function_exists('transliterator_transliterate') && $locale) {
 $transliterator = (array) $this->createTransliterator($locale);
 }
 if ($this->symbolsMap instanceof \Closure) {
 // If the symbols map is passed as a closure, there is no need to fallback to the parent locale
 // as the closure can just provide substitutions for all locales of interest.
 $symbolsMap = $this->symbolsMap;
 \array_unshift($transliterator, static function ($s) use($symbolsMap, $locale) {
 return $symbolsMap($s, $locale);
 });
 }
 $unicodeString = (new UnicodeString($string))->ascii($transliterator);
 if (\is_array($this->symbolsMap)) {
 $map = null;
 if (isset($this->symbolsMap[$locale])) {
 $map = $this->symbolsMap[$locale];
 } else {
 $parent = self::getParentLocale($locale);
 if ($parent && isset($this->symbolsMap[$parent])) {
 $map = $this->symbolsMap[$parent];
 }
 }
 if ($map) {
 foreach ($map as $char => $replace) {
 $unicodeString = $unicodeString->replace($char, ' ' . $replace . ' ');
 }
 }
 }
 return $unicodeString->replaceMatches('/[^A-Za-z0-9]++/', $separator)->trim($separator);
 }
 private function createTransliterator(string $locale) : ?\Transliterator
 {
 if (\array_key_exists($locale, $this->transliterators)) {
 return $this->transliterators[$locale];
 }
 // Exact locale supported, cache and return
 if ($id = self::LOCALE_TO_TRANSLITERATOR_ID[$locale] ?? null) {
 return $this->transliterators[$locale] = \Transliterator::create($id . '/BGN') ?? \Transliterator::create($id);
 }
 // Locale not supported and no parent, fallback to any-latin
 if (!($parent = self::getParentLocale($locale))) {
 return $this->transliterators[$locale] = null;
 }
 // Try to use the parent locale (ie. try "de" for "de_AT") and cache both locales
 if ($id = self::LOCALE_TO_TRANSLITERATOR_ID[$parent] ?? null) {
 $transliterator = \Transliterator::create($id . '/BGN') ?? \Transliterator::create($id);
 }
 return $this->transliterators[$locale] = $this->transliterators[$parent] = $transliterator ?? null;
 }
 private static function getParentLocale(?string $locale) : ?string
 {
 if (!$locale) {
 return null;
 }
 if (\false === ($str = \strrchr($locale, '_'))) {
 // no parent locale
 return null;
 }
 return \substr($locale, 0, -\strlen($str));
 }
}

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