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