1: <?php
  2: /**
  3:  * CakePHP(tm) : Rapid Development Framework (https://cakephp.org)
  4:  * Copyright (c) Cake Software Foundation, Inc. (https://cakefoundation.org)
  5:  *
  6:  * Licensed under The MIT License
  7:  * For full copyright and license information, please see the LICENSE.txt
  8:  * Redistributions of files must retain the above copyright notice.
  9:  *
 10:  * @copyright     Copyright (c) Cake Software Foundation, Inc. (https://cakefoundation.org)
 11:  * @link          https://cakephp.org CakePHP(tm) Project
 12:  * @since         3.0.0
 13:  * @license       https://opensource.org/licenses/mit-license.php MIT License
 14:  */
 15: namespace Cake\I18n;
 16: 
 17: /**
 18:  * Utility class used to determine the plural number to be used for a variable
 19:  * base on the locale
 20:  */
 21: class PluralRules
 22: {
 23: 
 24:     /**
 25:      * A map of locale => plurals group used to determine
 26:      * which plural rules apply to the language
 27:      *
 28:      * @var array
 29:      */
 30:     protected static $_rulesMap = [
 31:         'af' => 1,
 32:         'am' => 2,
 33:         'ar' => 13,
 34:         'az' => 1,
 35:         'be' => 3,
 36:         'bg' => 1,
 37:         'bh' => 2,
 38:         'bn' => 1,
 39:         'bo' => 0,
 40:         'bs' => 3,
 41:         'ca' => 1,
 42:         'cs' => 4,
 43:         'cy' => 14,
 44:         'da' => 1,
 45:         'de' => 1,
 46:         'dz' => 0,
 47:         'el' => 1,
 48:         'en' => 1,
 49:         'eo' => 1,
 50:         'es' => 1,
 51:         'et' => 1,
 52:         'eu' => 1,
 53:         'fa' => 1,
 54:         'fi' => 1,
 55:         'fil' => 2,
 56:         'fo' => 1,
 57:         'fr' => 2,
 58:         'fur' => 1,
 59:         'fy' => 1,
 60:         'ga' => 5,
 61:         'gl' => 1,
 62:         'gu' => 1,
 63:         'gun' => 2,
 64:         'ha' => 1,
 65:         'he' => 1,
 66:         'hi' => 2,
 67:         'hr' => 3,
 68:         'hu' => 1,
 69:         'id' => 0,
 70:         'is' => 15,
 71:         'it' => 1,
 72:         'ja' => 0,
 73:         'jv' => 0,
 74:         'ka' => 0,
 75:         'km' => 0,
 76:         'kn' => 0,
 77:         'ko' => 0,
 78:         'ku' => 1,
 79:         'lb' => 1,
 80:         'ln' => 2,
 81:         'lt' => 6,
 82:         'lv' => 10,
 83:         'mg' => 2,
 84:         'mk' => 8,
 85:         'ml' => 1,
 86:         'mn' => 1,
 87:         'mr' => 1,
 88:         'ms' => 0,
 89:         'mt' => 9,
 90:         'nah' => 1,
 91:         'nb' => 1,
 92:         'ne' => 1,
 93:         'nl' => 1,
 94:         'nn' => 1,
 95:         'no' => 1,
 96:         'nso' => 2,
 97:         'om' => 1,
 98:         'or' => 1,
 99:         'pa' => 1,
100:         'pap' => 1,
101:         'pl' => 11,
102:         'ps' => 1,
103:         'pt_pt' => 2,
104:         'pt' => 1,
105:         'ro' => 12,
106:         'ru' => 3,
107:         'sk' => 4,
108:         'sl' => 7,
109:         'so' => 1,
110:         'sq' => 1,
111:         'sr' => 3,
112:         'sv' => 1,
113:         'sw' => 1,
114:         'ta' => 1,
115:         'te' => 1,
116:         'th' => 0,
117:         'ti' => 2,
118:         'tk' => 1,
119:         'tr' => 0,
120:         'uk' => 3,
121:         'ur' => 1,
122:         'vi' => 0,
123:         'wa' => 2,
124:         'zh' => 0,
125:         'zu' => 1,
126:     ];
127: 
128:     /**
129:      * Returns the plural form number for the passed locale corresponding
130:      * to the countable provided in $n.
131:      *
132:      * @param string $locale The locale to get the rule calculated for.
133:      * @param int|float $n The number to apply the rules to.
134:      * @return int The plural rule number that should be used.
135:      * @link http://localization-guide.readthedocs.org/en/latest/l10n/pluralforms.html
136:      * @link https://developer.mozilla.org/en-US/docs/Mozilla/Localization/Localization_and_Plurals#List_of_Plural_Rules
137:      */
138:     public static function calculate($locale, $n)
139:     {
140:         $locale = strtolower($locale);
141: 
142:         if (!isset(static::$_rulesMap[$locale])) {
143:             $locale = explode('_', $locale)[0];
144:         }
145: 
146:         if (!isset(static::$_rulesMap[$locale])) {
147:             return 0;
148:         }
149: 
150:         switch (static::$_rulesMap[$locale]) {
151:             case 0:
152:                 return 0;
153:             case 1:
154:                 return $n == 1 ? 0 : 1;
155:             case 2:
156:                 return $n > 1 ? 1 : 0;
157:             case 3:
158:                 return $n % 10 == 1 && $n % 100 != 11 ? 0 :
159:                     (($n % 10 >= 2 && $n % 10 <= 4) && ($n % 100 < 10 || $n % 100 >= 20) ? 1 : 2);
160:             case 4:
161:                 return $n == 1 ? 0 :
162:                     ($n >= 2 && $n <= 4 ? 1 : 2);
163:             case 5:
164:                 return $n == 1 ? 0 :
165:                     ($n == 2 ? 1 : ($n < 7 ? 2 : ($n < 11 ? 3 : 4)));
166:             case 6:
167:                 return $n % 10 == 1 && $n % 100 != 11 ? 0 :
168:                     ($n % 10 >= 2 && ($n % 100 < 10 || $n % 100 >= 20) ? 1 : 2);
169:             case 7:
170:                 return $n % 100 == 1 ? 1 :
171:                     ($n % 100 == 2 ? 2 : ($n % 100 == 3 || $n % 100 == 4 ? 3 : 0));
172:             case 8:
173:                 return $n % 10 == 1 ? 0 : ($n % 10 == 2 ? 1 : 2);
174:             case 9:
175:                 return $n == 1 ? 0 :
176:                     ($n == 0 || ($n % 100 > 0 && $n % 100 <= 10) ? 1 :
177:                     ($n % 100 > 10 && $n % 100 < 20 ? 2 : 3));
178:             case 10:
179:                 return $n % 10 == 1 && $n % 100 != 11 ? 0 : ($n != 0 ? 1 : 2);
180:             case 11:
181:                 return $n == 1 ? 0 :
182:                     ($n % 10 >= 2 && $n % 10 <= 4 && ($n % 100 < 10 || $n % 100 >= 20) ? 1 : 2);
183:             case 12:
184:                 return $n == 1 ? 0 :
185:                     ($n == 0 || $n % 100 > 0 && $n % 100 < 20 ? 1 : 2);
186:             case 13:
187:                 return $n == 0 ? 0 :
188:                     ($n == 1 ? 1 :
189:                     ($n == 2 ? 2 :
190:                     ($n % 100 >= 3 && $n % 100 <= 10 ? 3 :
191:                     ($n % 100 >= 11 ? 4 : 5))));
192:             case 14:
193:                 return $n == 1 ? 0 :
194:                     ($n == 2 ? 1 :
195:                     ($n != 8 && $n != 11 ? 2 : 3));
196:             case 15:
197:                 return ($n % 10 != 1 || $n % 100 == 11) ? 1 : 0;
198:         }
199:     }
200: }
201: