TranslatorTrait.php

<?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\Contracts\Translation;

use Symfony\Component\Translation\Exception\InvalidArgumentException;

/**
 * A trait to help implement TranslatorInterface and LocaleAwareInterface.
 *
 * @author Fabien Potencier <fabien@symfony.com>
 */
trait TranslatorTrait {
    private ?string $locale = null;
    
    /**
     * @return void
     */
    public function setLocale(string $locale) {
        $this->locale = $locale;
    }
    public function getLocale() : string {
        return $this->locale ?: (class_exists(\Locale::class) ? \Locale::getDefault() : 'en');
    }
    public function trans(?string $id, array $parameters = [], ?string $domain = null, ?string $locale = null) : string {
        if (null === $id || '' === $id) {
            return '';
        }
        if (!isset($parameters['%count%']) || !is_numeric($parameters['%count%'])) {
            return strtr($id, $parameters);
        }
        $number = (double) $parameters['%count%'];
        $locale = $locale ?: $this->getLocale();
        $parts = [];
        if (preg_match('/^\\|++$/', $id)) {
            $parts = explode('|', $id);
        }
        elseif (preg_match_all('/(?:\\|\\||[^\\|])++/', $id, $matches)) {
            $parts = $matches[0];
        }
        $intervalRegexp = <<<'EOF'
/^(?P<interval>
    ({\s*
        (\-?\d+(\.\d+)?[\s*,\s*\-?\d+(\.\d+)?]*)
    \s*})

        |

    (?P<left_delimiter>[\[\]])
        \s*
        (?P<left>-Inf|\-?\d+(\.\d+)?)
        \s*,\s*
        (?P<right>\+?Inf|\-?\d+(\.\d+)?)
        \s*
    (?P<right_delimiter>[\[\]])
)\s*(?P<message>.*?)$/xs
EOF;
        $standardRules = [];
        foreach ($parts as $part) {
            $part = trim(str_replace('||', '|', $part));
            // try to match an explicit rule, then fallback to the standard ones
            if (preg_match($intervalRegexp, $part, $matches)) {
                if ($matches[2]) {
                    foreach (explode(',', $matches[3]) as $n) {
                        if ($number == $n) {
                            return strtr($matches['message'], $parameters);
                        }
                    }
                }
                else {
                    $leftNumber = '-Inf' === $matches['left'] ? -\INF : (double) $matches['left'];
                    $rightNumber = is_numeric($matches['right']) ? (double) $matches['right'] : \INF;
                    if (('[' === $matches['left_delimiter'] ? $number >= $leftNumber : $number > $leftNumber) && (']' === $matches['right_delimiter'] ? $number <= $rightNumber : $number < $rightNumber)) {
                        return strtr($matches['message'], $parameters);
                    }
                }
            }
            elseif (preg_match('/^\\w+\\:\\s*(.*?)$/', $part, $matches)) {
                $standardRules[] = $matches[1];
            }
            else {
                $standardRules[] = $part;
            }
        }
        $position = $this->getPluralizationRule($number, $locale);
        if (!isset($standardRules[$position])) {
            // when there's exactly one rule given, and that rule is a standard
            // rule, use this rule
            if (1 === \count($parts) && isset($standardRules[0])) {
                return strtr($standardRules[0], $parameters);
            }
            $message = sprintf('Unable to choose a translation for "%s" with locale "%s" for value "%d". Double check that this translation has the correct plural options (e.g. "There is one apple|There are %%count%% apples").', $id, $locale, $number);
            if (class_exists(InvalidArgumentException::class)) {
                throw new InvalidArgumentException($message);
            }
            throw new \InvalidArgumentException($message);
        }
        return strtr($standardRules[$position], $parameters);
    }
    
    /**
     * Returns the plural position to use for the given locale and number.
     *
     * The plural rules are derived from code of the Zend Framework (2010-09-25),
     * which is subject to the new BSD license (http://framework.zend.com/license/new-bsd).
     * Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
     */
    private function getPluralizationRule(float $number, string $locale) : int {
        $number = abs($number);
        return match ('pt_BR' !== $locale && 'en_US_POSIX' !== $locale && \strlen($locale) > 3 ? substr($locale, 0, strrpos($locale, '_')) : $locale) {    'af', 'bn', 'bg', 'ca', 'da', 'de', 'el', 'en', 'en_US_POSIX', 'eo', 'es', 'et', 'eu', 'fa', 'fi', 'fo', 'fur', 'fy', 'gl', 'gu', 'ha', 'he', 'hu', 'is', 'it', 'ku', 'lb', 'ml', 'mn', 'mr', 'nah', 'nb', 'ne', 'nl', 'nn', 'no', 'oc', 'om', 'or', 'pa', 'pap', 'ps', 'pt', 'so', 'sq', 'sv', 'sw', 'ta', 'te', 'tk', 'ur', 'zu' => 1 == $number ? 0 : 1,
            'am', 'bh', 'fil', 'fr', 'gun', 'hi', 'hy', 'ln', 'mg', 'nso', 'pt_BR', 'ti', 'wa' => $number < 2 ? 0 : 1,
            'be', 'bs', 'hr', 'ru', 'sh', 'sr', 'uk' => 1 == $number % 10 && 11 != $number % 100 ? 0 : ($number % 10 >= 2 && $number % 10 <= 4 && ($number % 100 < 10 || $number % 100 >= 20) ? 1 : 2),
            'cs', 'sk' => 1 == $number ? 0 : ($number >= 2 && $number <= 4 ? 1 : 2),
            'ga' => 1 == $number ? 0 : (2 == $number ? 1 : 2),
            'lt' => 1 == $number % 10 && 11 != $number % 100 ? 0 : ($number % 10 >= 2 && ($number % 100 < 10 || $number % 100 >= 20) ? 1 : 2),
            'sl' => 1 == $number % 100 ? 0 : (2 == $number % 100 ? 1 : (3 == $number % 100 || 4 == $number % 100 ? 2 : 3)),
            'mk' => 1 == $number % 10 ? 0 : 1,
            'mt' => 1 == $number ? 0 : (0 == $number || $number % 100 > 1 && $number % 100 < 11 ? 1 : ($number % 100 > 10 && $number % 100 < 20 ? 2 : 3)),
            'lv' => 0 == $number ? 0 : (1 == $number % 10 && 11 != $number % 100 ? 1 : 2),
            'pl' => 1 == $number ? 0 : ($number % 10 >= 2 && $number % 10 <= 4 && ($number % 100 < 12 || $number % 100 > 14) ? 1 : 2),
            'cy' => 1 == $number ? 0 : (2 == $number ? 1 : (8 == $number || 11 == $number ? 2 : 3)),
            'ro' => 1 == $number ? 0 : (0 == $number || $number % 100 > 0 && $number % 100 < 20 ? 1 : 2),
            'ar' => 0 == $number ? 0 : (1 == $number ? 1 : (2 == $number ? 2 : ($number % 100 >= 3 && $number % 100 <= 10 ? 3 : ($number % 100 >= 11 && $number % 100 <= 99 ? 4 : 5)))),
            default => 0,
        
        };
    }

}