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| 1 | <?php |
| 2 | /** |
| 3 | * This program is free software; you can redistribute it and/or modify |
| 4 | * it under the terms of the GNU General Public License as published by |
| 5 | * the Free Software Foundation; either version 2 of the License, or |
| 6 | * (at your option) any later version. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License along |
| 14 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 15 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| 16 | * http://www.gnu.org/copyleft/gpl.html |
| 17 | * |
| 18 | * @file |
| 19 | */ |
| 20 | |
| 21 | namespace MediaWiki\Languages; |
| 22 | |
| 23 | use InvalidArgumentException; |
| 24 | use Language; |
| 25 | use LanguageCode; |
| 26 | use LanguageConverter; |
| 27 | use LocalisationCache; |
| 28 | use LogicException; |
| 29 | use MapCacheLRU; |
| 30 | use MediaWiki\Config\Config; |
| 31 | use MediaWiki\Config\ServiceOptions; |
| 32 | use MediaWiki\HookContainer\HookContainer; |
| 33 | use MediaWiki\MainConfigNames; |
| 34 | use MediaWiki\Title\NamespaceInfo; |
| 35 | use Wikimedia\Bcp47Code\Bcp47Code; |
| 36 | |
| 37 | /** |
| 38 | * Internationalisation code |
| 39 | * See https://www.mediawiki.org/wiki/Special:MyLanguage/Localisation for more information. |
| 40 | * |
| 41 | * @ingroup Language |
| 42 | * @since 1.35 |
| 43 | */ |
| 44 | class LanguageFactory { |
| 45 | /** @var ServiceOptions */ |
| 46 | private $options; |
| 47 | |
| 48 | /** @var NamespaceInfo */ |
| 49 | private $namespaceInfo; |
| 50 | |
| 51 | /** @var LocalisationCache */ |
| 52 | private $localisationCache; |
| 53 | |
| 54 | /** @var LanguageNameUtils */ |
| 55 | private $langNameUtils; |
| 56 | |
| 57 | /** @var LanguageFallback */ |
| 58 | private $langFallback; |
| 59 | |
| 60 | /** @var LanguageConverterFactory */ |
| 61 | private $langConverterFactory; |
| 62 | |
| 63 | /** @var HookContainer */ |
| 64 | private $hookContainer; |
| 65 | |
| 66 | /** @var MapCacheLRU */ |
| 67 | private $langObjCache; |
| 68 | |
| 69 | /** @var Config */ |
| 70 | private $config; |
| 71 | |
| 72 | /** @var array */ |
| 73 | private $parentLangCache = []; |
| 74 | |
| 75 | /** |
| 76 | * @internal For use by ServiceWiring |
| 77 | */ |
| 78 | public const CONSTRUCTOR_OPTIONS = [ |
| 79 | MainConfigNames::DummyLanguageCodes, |
| 80 | ]; |
| 81 | |
| 82 | /** How many distinct Language objects to retain at most in memory (T40439). */ |
| 83 | private const LANG_CACHE_SIZE = 10; |
| 84 | |
| 85 | /** |
| 86 | * @param ServiceOptions $options |
| 87 | * @param NamespaceInfo $namespaceInfo |
| 88 | * @param LocalisationCache $localisationCache |
| 89 | * @param LanguageNameUtils $langNameUtils |
| 90 | * @param LanguageFallback $langFallback |
| 91 | * @param LanguageConverterFactory $langConverterFactory |
| 92 | * @param HookContainer $hookContainer |
| 93 | * @param Config $config |
| 94 | */ |
| 95 | public function __construct( |
| 96 | ServiceOptions $options, |
| 97 | NamespaceInfo $namespaceInfo, |
| 98 | LocalisationCache $localisationCache, |
| 99 | LanguageNameUtils $langNameUtils, |
| 100 | LanguageFallback $langFallback, |
| 101 | LanguageConverterFactory $langConverterFactory, |
| 102 | HookContainer $hookContainer, |
| 103 | Config $config |
| 104 | ) { |
| 105 | // We have both ServiceOptions and a Config object because |
| 106 | // the Language class hasn't (yet) been updated to use ServiceOptions |
| 107 | // and for now gets a full Config |
| 108 | $options->assertRequiredOptions( self::CONSTRUCTOR_OPTIONS ); |
| 109 | |
| 110 | $this->options = $options; |
| 111 | $this->namespaceInfo = $namespaceInfo; |
| 112 | $this->localisationCache = $localisationCache; |
| 113 | $this->langNameUtils = $langNameUtils; |
| 114 | $this->langFallback = $langFallback; |
| 115 | $this->langConverterFactory = $langConverterFactory; |
| 116 | $this->hookContainer = $hookContainer; |
| 117 | $this->langObjCache = new MapCacheLRU( self::LANG_CACHE_SIZE ); |
| 118 | $this->config = $config; |
| 119 | } |
| 120 | |
| 121 | /** |
| 122 | * Get a cached or new language object for a given language code |
| 123 | * with normalization of the language code. |
| 124 | * |
| 125 | * If the language code comes from user input, check |
| 126 | * LanguageNameUtils::isValidCode() before calling this method. |
| 127 | * |
| 128 | * The language code is presumed to be a MediaWiki-internal code, |
| 129 | * unless you pass a Bcp47Code opaque object, in which case it is |
| 130 | * presumed to be a standard BCP-47 code. (There are, regrettably, |
| 131 | * some ambiguous codes where this makes a difference.) |
| 132 | * |
| 133 | * As the Language class itself implements Bcp47Code, this method is an efficient |
| 134 | * and safe downcast if you pass in a Language object. |
| 135 | * |
| 136 | * @param string|Bcp47Code $code |
| 137 | * @return Language |
| 138 | */ |
| 139 | public function getLanguage( $code ): Language { |
| 140 | if ( $code instanceof Language ) { |
| 141 | return $code; |
| 142 | } |
| 143 | if ( $code instanceof Bcp47Code ) { |
| 144 | // Any compatibility remapping of valid BCP-47 codes would be done |
| 145 | // inside ::bcp47ToInternal, not here. |
| 146 | $code = LanguageCode::bcp47ToInternal( $code ); |
| 147 | } else { |
| 148 | // Perform various deprecated and compatibility mappings of |
| 149 | // internal codes. |
| 150 | $code = $this->options->get( MainConfigNames::DummyLanguageCodes )[$code] ?? $code; |
| 151 | } |
| 152 | return $this->getRawLanguage( $code ); |
| 153 | } |
| 154 | |
| 155 | /** |
| 156 | * Get a cached or new language object for a given language code |
| 157 | * without normalization of the language code. |
| 158 | * |
| 159 | * If the language code comes from user input, check LanguageNameUtils::isValidCode() |
| 160 | * before calling this method. |
| 161 | * |
| 162 | * @param string $code |
| 163 | * @return Language |
| 164 | * @since 1.39 |
| 165 | */ |
| 166 | public function getRawLanguage( $code ): Language { |
| 167 | return $this->langObjCache->getWithSetCallback( |
| 168 | $code, |
| 169 | function () use ( $code ) { |
| 170 | return $this->newFromCode( $code ); |
| 171 | } |
| 172 | ); |
| 173 | } |
| 174 | |
| 175 | /** |
| 176 | * Create a language object for a given language code. |
| 177 | * |
| 178 | * @param string $code |
| 179 | * @param bool $fallback Whether we're going through the language fallback chain |
| 180 | * @return Language |
| 181 | */ |
| 182 | private function newFromCode( $code, $fallback = false ): Language { |
| 183 | if ( !$this->langNameUtils->isValidCode( $code ) ) { |
| 184 | throw new InvalidArgumentException( "Invalid language code \"$code\"" ); |
| 185 | } |
| 186 | |
| 187 | $constructorArgs = [ |
| 188 | $code, |
| 189 | $this->namespaceInfo, |
| 190 | $this->localisationCache, |
| 191 | $this->langNameUtils, |
| 192 | $this->langFallback, |
| 193 | $this->langConverterFactory, |
| 194 | $this->hookContainer, |
| 195 | $this->config |
| 196 | ]; |
| 197 | |
| 198 | if ( !$this->langNameUtils->isValidBuiltInCode( $code ) ) { |
| 199 | // It's not possible to customise this code with class files, so |
| 200 | // just return a Language object. This is to support uselang= hacks. |
| 201 | return new Language( ...$constructorArgs ); |
| 202 | } |
| 203 | |
| 204 | // Check if there is a language class for the code |
| 205 | $class = $this->classFromCode( $code, $fallback ); |
| 206 | // LanguageCode does not inherit Language |
| 207 | if ( class_exists( $class ) && is_a( $class, 'Language', true ) ) { |
| 208 | return new $class( ...$constructorArgs ); |
| 209 | } |
| 210 | |
| 211 | // Keep trying the fallback list until we find an existing class |
| 212 | $fallbacks = $this->langFallback->getAll( $code ); |
| 213 | foreach ( $fallbacks as $fallbackCode ) { |
| 214 | $class = $this->classFromCode( $fallbackCode ); |
| 215 | if ( class_exists( $class ) ) { |
| 216 | // TODO allow additional dependencies to be injected for subclasses somehow |
| 217 | return new $class( ...$constructorArgs ); |
| 218 | } |
| 219 | } |
| 220 | |
| 221 | throw new LogicException( "Invalid fallback sequence for language '$code'" ); |
| 222 | } |
| 223 | |
| 224 | /** |
| 225 | * @param string $code |
| 226 | * @param bool $fallback Whether we're going through the language fallback chain |
| 227 | * @return string Name of the language class |
| 228 | */ |
| 229 | private function classFromCode( $code, $fallback = true ) { |
| 230 | if ( $fallback && $code == 'en' ) { |
| 231 | return 'Language'; |
| 232 | } else { |
| 233 | return 'Language' . str_replace( '-', '_', ucfirst( $code ) ); |
| 234 | } |
| 235 | } |
| 236 | |
| 237 | /** |
| 238 | * Get the "parent" language which has a converter to convert a "compatible" language |
| 239 | * (in another variant) to this language (eg., zh for zh-cn, but not en for en-gb). |
| 240 | * |
| 241 | * @note This method does not contain the deprecated and compatibility |
| 242 | * mappings of Language::getLanguage(string). |
| 243 | * |
| 244 | * @param string|Bcp47Code $code The language to convert to; can be an |
| 245 | * internal MediaWiki language code or a Bcp47Code object (which includes |
| 246 | * Language, which implements Bcp47Code). |
| 247 | * @return Language|null A base language which has a converter to the given |
| 248 | * language, or null if none exists. |
| 249 | * @since 1.22 |
| 250 | */ |
| 251 | public function getParentLanguage( $code ) { |
| 252 | if ( $code instanceof Language ) { |
| 253 | $code = $code->getCode(); |
| 254 | } elseif ( $code instanceof Bcp47Code ) { |
| 255 | $code = LanguageCode::bcp47ToInternal( $code ); |
| 256 | } |
| 257 | // $code is now a mediawiki internal code string. |
| 258 | // We deliberately use array_key_exists() instead of isset() because we cache null. |
| 259 | if ( !array_key_exists( $code, $this->parentLangCache ) ) { |
| 260 | if ( !$this->langNameUtils->isValidBuiltInCode( $code ) ) { |
| 261 | $this->parentLangCache[$code] = null; |
| 262 | return null; |
| 263 | } |
| 264 | foreach ( LanguageConverter::$languagesWithVariants as $mainCode ) { |
| 265 | $lang = $this->getLanguage( $mainCode ); |
| 266 | $converter = $this->langConverterFactory->getLanguageConverter( $lang ); |
| 267 | if ( $converter->hasVariant( $code ) ) { |
| 268 | $this->parentLangCache[$code] = $lang; |
| 269 | return $lang; |
| 270 | } |
| 271 | } |
| 272 | $this->parentLangCache[$code] = null; |
| 273 | } |
| 274 | |
| 275 | return $this->parentLangCache[$code]; |
| 276 | } |
| 277 | } |