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vendor/symfony/string/Slugger/AsciiSlugger.php

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+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\String\Slugger;
+
+use Symfony\Component\String\AbstractUnicodeString;
+use Symfony\Component\String\UnicodeString;
+use 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".');
+}
+
+/**
+ * @author Titouan Galopin <galopintitouan@gmail.com>
+ */
+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'],
+    ];
+
+    /**
+     * Cache of transliterators per locale.
+     *
+     * @var \Transliterator[]
+     */
+    private $transliterators = [];
+
+    /**
+     * @param array|\Closure|null $symbolsMap
+     */
+    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 ?? $this->symbolsMap;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function setLocale($locale)
+    {
+        $this->defaultLocale = $locale;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getLocale()
+    {
+        return $this->defaultLocale;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    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));
+    }
+}