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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 MediaWiki\Config\ServiceOptions; |
| 25 | use MediaWiki\HookContainer\HookContainer; |
| 26 | use MediaWiki\HookContainer\HookRunner; |
| 27 | use MediaWiki\Language\LanguageCode; |
| 28 | use MediaWiki\MainConfigNames; |
| 29 | use MediaWiki\Title\MediaWikiTitleCodec; |
| 30 | use Wikimedia\ObjectCache\BagOStuff; |
| 31 | use Wikimedia\ObjectCache\HashBagOStuff; |
| 32 | |
| 33 | /** |
| 34 | * A service that provides utilities to do with language names and codes. |
| 35 | * |
| 36 | * See https://www.mediawiki.org/wiki/Special:MyLanguage/Localisation for more information. |
| 37 | * |
| 38 | * @since 1.34 |
| 39 | * @ingroup Language |
| 40 | */ |
| 41 | class LanguageNameUtils { |
| 42 | /** |
| 43 | * Return autonyms in getLanguageName(s). |
| 44 | */ |
| 45 | public const AUTONYMS = null; |
| 46 | |
| 47 | /** |
| 48 | * Return all known languages in getLanguageName(s). |
| 49 | */ |
| 50 | public const ALL = 'all'; |
| 51 | |
| 52 | /** |
| 53 | * Return in getLanguageName(s) only the languages that are defined by MediaWiki. |
| 54 | */ |
| 55 | public const DEFINED = 'mw'; |
| 56 | |
| 57 | /** |
| 58 | * Return in getLanguageName(s) only the languages for which we have at least some localisation. |
| 59 | */ |
| 60 | public const SUPPORTED = 'mwfile'; |
| 61 | |
| 62 | /** @var ServiceOptions */ |
| 63 | private $options; |
| 64 | |
| 65 | /** |
| 66 | * Cache for language names |
| 67 | * @var HashBagOStuff|null |
| 68 | */ |
| 69 | private $languageNameCache; |
| 70 | |
| 71 | /** |
| 72 | * Cache for validity of language codes |
| 73 | * @var array |
| 74 | */ |
| 75 | private $validCodeCache = []; |
| 76 | |
| 77 | /** |
| 78 | * @internal For use by ServiceWiring |
| 79 | */ |
| 80 | public const CONSTRUCTOR_OPTIONS = [ |
| 81 | MainConfigNames::ExtraLanguageNames, |
| 82 | MainConfigNames::UsePigLatinVariant, |
| 83 | MainConfigNames::UseXssLanguage, |
| 84 | ]; |
| 85 | |
| 86 | /** @var HookRunner */ |
| 87 | private $hookRunner; |
| 88 | |
| 89 | public function __construct( ServiceOptions $options, HookContainer $hookContainer ) { |
| 90 | $options->assertRequiredOptions( self::CONSTRUCTOR_OPTIONS ); |
| 91 | $this->options = $options; |
| 92 | $this->hookRunner = new HookRunner( $hookContainer ); |
| 93 | } |
| 94 | |
| 95 | /** |
| 96 | * Checks whether any localisation is available for that language tag in MediaWiki |
| 97 | * (MessagesXx.php or xx.json exists). |
| 98 | * |
| 99 | * @param string $code Language tag (in lower case) |
| 100 | * @return bool Whether language is supported |
| 101 | */ |
| 102 | public function isSupportedLanguage( string $code ): bool { |
| 103 | if ( !$this->isValidBuiltInCode( $code ) ) { |
| 104 | return false; |
| 105 | } |
| 106 | |
| 107 | if ( $code === 'qqq' ) { |
| 108 | // Special code for internal use, not supported even though there is a qqq.json |
| 109 | return false; |
| 110 | } |
| 111 | if ( |
| 112 | $code === 'en-x-piglatin' && |
| 113 | !$this->options->get( MainConfigNames::UsePigLatinVariant ) |
| 114 | ) { |
| 115 | // Suppress Pig Latin unless explicitly enabled. |
| 116 | return false; |
| 117 | } |
| 118 | |
| 119 | return is_readable( $this->getMessagesFileName( $code ) ) || |
| 120 | is_readable( $this->getJsonMessagesFileName( $code ) ); |
| 121 | } |
| 122 | |
| 123 | /** |
| 124 | * Returns true if a language code string is of a valid form, whether it exists. |
| 125 | * This includes codes which are used solely for customisation via the MediaWiki namespace. |
| 126 | * |
| 127 | * @param string $code |
| 128 | * |
| 129 | * @return bool False if the language code contains dangerous characters, e.g, HTML special |
| 130 | * characters or characters that are illegal in MediaWiki titles. |
| 131 | */ |
| 132 | public function isValidCode( string $code ): bool { |
| 133 | if ( !isset( $this->validCodeCache[$code] ) ) { |
| 134 | // People think language codes are HTML-safe, so enforce it. Ideally, we should only |
| 135 | // allow a-zA-Z0-9- but .+ and other chars are often used for {{int:}} hacks. See bugs |
| 136 | // T39564, T39587, T38938. |