1<?php
2
3/*
4 * This file is part of the Symfony package.
5 *
6 * (c) Fabien Potencier <fabien@symfony.com>
7 *
8 * For the full copyright and license information, please view the LICENSE
9 * file that was distributed with this source code.
10 */
11
12namespace Symfony\Contracts\Translation;
13
14use Symfony\Component\Translation\Exception\InvalidArgumentException;
15
16/**
17 * A trait to help implement TranslatorInterface and LocaleAwareInterface.
18 *
19 * @author Fabien Potencier <fabien@symfony.com>
20 */
21trait TranslatorTrait
22{
23    private $locale;
24
25    /**
26     * {@inheritdoc}
27     */
28    public function setLocale(string $locale)
29    {
30        $this->locale = $locale;
31    }
32
33    /**
34     * {@inheritdoc}
35     *
36     * @return string
37     */
38    public function getLocale()
39    {
40        return $this->locale ?: (class_exists(\Locale::class) ? \Locale::getDefault() : 'en');
41    }
42
43    /**
44     * {@inheritdoc}
45     */
46    public function trans(?string $id, array $parameters = [], string $domain = null, string $locale = null): string
47    {
48        if (null === $id || '' === $id) {
49            return '';
50        }
51
52        if (!isset($parameters['%count%']) || !is_numeric($parameters['%count%'])) {
53            return strtr($id, $parameters);
54        }
55
56        $number = (float) $parameters['%count%'];
57        $locale = $locale ?: $this->getLocale();
58
59        $parts = [];
60        if (preg_match('/^\|++$/', $id)) {
61            $parts = explode('|', $id);
62        } elseif (preg_match_all('/(?:\|\||[^\|])++/', $id, $matches)) {
63            $parts = $matches[0];
64        }
65
66        $intervalRegexp = <<<'EOF'
67/^(?P<interval>
68    ({\s*
69        (\-?\d+(\.\d+)?[\s*,\s*\-?\d+(\.\d+)?]*)
70    \s*})
71
72        |
73
74    (?P<left_delimiter>[\[\]])
75        \s*
76        (?P<left>-Inf|\-?\d+(\.\d+)?)
77        \s*,\s*
78        (?P<right>\+?Inf|\-?\d+(\.\d+)?)
79        \s*
80    (?P<right_delimiter>[\[\]])
81)\s*(?P<message>.*?)$/xs
82EOF;
83
84        $standardRules = [];
85        foreach ($parts as $part) {
86            $part = trim(str_replace('||', '|', $part));
87
88            // try to match an explicit rule, then fallback to the standard ones
89            if (preg_match($intervalRegexp, $part, $matches)) {
90                if ($matches[2]) {
91                    foreach (explode(',', $matches[3]) as $n) {
92                        if ($number == $n) {
93                            return strtr($matches['message'], $parameters);
94                        }
95                    }
96                } else {
97                    $leftNumber = '-Inf' === $matches['left'] ? -\INF : (float) $matches['left'];
98                    $rightNumber = is_numeric($matches['right']) ? (float) $matches['right'] : \INF;
99
100                    if (('[' === $matches['left_delimiter'] ? $number >= $leftNumber : $number > $leftNumber)
101                        && (']' === $matches['right_delimiter'] ? $number <= $rightNumber : $number < $rightNumber)
102                    ) {
103                        return strtr($matches['message'], $parameters);
104                    }
105                }
106            } elseif (preg_match('/^\w+\:\s*(.*?)$/', $part, $matches)) {
107                $standardRules[] = $matches[1];
108            } else {
109                $standardRules[] = $part;
110            }
111        }
112
113        $position = $this->getPluralizationRule($number, $locale);
114
115        if (!isset($standardRules[$position])) {
116            // when there's exactly one rule given, and that rule is a standard
117            // rule, use this rule
118            if (1 === \count($parts) && isset($standardRules[0])) {
119                return strtr($standardRules[0], $parameters);
120            }
121
122            $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, $number);
123
124            if (class_exists(InvalidArgumentException::class)) {
125                throw new InvalidArgumentException($message);
126            }
127
128            throw new \InvalidArgumentException($message);
129        }
130
131        return strtr($standardRules[$position], $parameters);
132    }
133
134    /**
135     * Returns the plural position to use for the given locale and number.
136     *
137     * The plural rules are derived from code of the Zend Framework (2010-09-25),
138     * which is subject to the new BSD license (http://framework.zend.com/license/new-bsd).
139     * Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
140     */
141    private function getPluralizationRule(float $number, string $locale): int
142    {
143        $number = abs($number);
144
145        switch ('pt_BR' !== $locale && \strlen($locale) > 3 ? substr($locale, 0, strrpos($locale, '_')) : $locale) {
146            case 'af':
147            case 'bn':
148            case 'bg':
149            case 'ca':
150            case 'da':
151            case 'de':
152            case 'el':
153            case 'en':
154            case 'eo':
155            case 'es':
156            case 'et':
157            case 'eu':
158            case 'fa':
159            case 'fi':
160            case 'fo':
161            case 'fur':
162            case 'fy':
163            case 'gl':
164            case 'gu':
165            case 'ha':
166            case 'he':
167            case 'hu':
168            case 'is':
169            case 'it':
170            case 'ku':
171            case 'lb':
172            case 'ml':
173            case 'mn':
174            case 'mr':
175            case 'nah':
176            case 'nb':
177            case 'ne':
178            case 'nl':
179            case 'nn':
180            case 'no':
181            case 'oc':
182            case 'om':
183            case 'or':
184            case 'pa':
185            case 'pap':
186            case 'ps':
187            case 'pt':
188            case 'so':
189            case 'sq':
190            case 'sv':
191            case 'sw':
192            case 'ta':
193            case 'te':
194            case 'tk':
195            case 'ur':
196            case 'zu':
197                return (1 == $number) ? 0 : 1;
198
199            case 'am':
200            case 'bh':
201            case 'fil':
202            case 'fr':
203            case 'gun':
204            case 'hi':
205            case 'hy':
206            case 'ln':
207            case 'mg':
208            case 'nso':
209            case 'pt_BR':
210            case 'ti':
211            case 'wa':
212                return ($number < 2) ? 0 : 1;
213
214            case 'be':
215            case 'bs':
216            case 'hr':
217            case 'ru':
218            case 'sh':
219            case 'sr':
220            case 'uk':
221                return ((1 == $number % 10) && (11 != $number % 100)) ? 0 : ((($number % 10 >= 2) && ($number % 10 <= 4) && (($number % 100 < 10) || ($number % 100 >= 20))) ? 1 : 2);
222
223            case 'cs':
224            case 'sk':
225                return (1 == $number) ? 0 : ((($number >= 2) && ($number <= 4)) ? 1 : 2);
226
227            case 'ga':
228                return (1 == $number) ? 0 : ((2 == $number) ? 1 : 2);
229
230            case 'lt':
231                return ((1 == $number % 10) && (11 != $number % 100)) ? 0 : ((($number % 10 >= 2) && (($number % 100 < 10) || ($number % 100 >= 20))) ? 1 : 2);
232
233            case 'sl':
234                return (1 == $number % 100) ? 0 : ((2 == $number % 100) ? 1 : (((3 == $number % 100) || (4 == $number % 100)) ? 2 : 3));
235
236            case 'mk':
237                return (1 == $number % 10) ? 0 : 1;
238
239            case 'mt':
240                return (1 == $number) ? 0 : (((0 == $number) || (($number % 100 > 1) && ($number % 100 < 11))) ? 1 : ((($number % 100 > 10) && ($number % 100 < 20)) ? 2 : 3));
241
242            case 'lv':
243                return (0 == $number) ? 0 : (((1 == $number % 10) && (11 != $number % 100)) ? 1 : 2);
244
245            case 'pl':
246                return (1 == $number) ? 0 : ((($number % 10 >= 2) && ($number % 10 <= 4) && (($number % 100 < 12) || ($number % 100 > 14))) ? 1 : 2);
247
248            case 'cy':
249                return (1 == $number) ? 0 : ((2 == $number) ? 1 : (((8 == $number) || (11 == $number)) ? 2 : 3));
250
251            case 'ro':
252                return (1 == $number) ? 0 : (((0 == $number) || (($number % 100 > 0) && ($number % 100 < 20))) ? 1 : 2);
253
254            case 'ar':
255                return (0 == $number) ? 0 : ((1 == $number) ? 1 : ((2 == $number) ? 2 : ((($number % 100 >= 3) && ($number % 100 <= 10)) ? 3 : ((($number % 100 >= 11) && ($number % 100 <= 99)) ? 4 : 5))));
256
257            default:
258                return 0;
259        }
260    }
261}
262