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| Alphabets | |
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| 1 | <?php |
| 2 | |
| 3 | namespace MediaWiki\Extension\CLDR; |
| 4 | |
| 5 | use MediaWiki\MediaWikiServices; |
| 6 | |
| 7 | /** |
| 8 | * Series of main alphabet symbols for a language, parsed from CLDR data. |
| 9 | * https://www.unicode.org/cldr/charts/45/by_type/core_data.alphabetic_information.html |
| 10 | * |
| 11 | * @license GPL-2.0-or-later |
| 12 | */ |
| 13 | class Alphabets { |
| 14 | |
| 15 | /** @var array<string,string[]|null> */ |
| 16 | private static array $cache = []; |
| 17 | |
| 18 | /** |
| 19 | * Get alphabet for a locale or its fallbacks |
| 20 | * |
| 21 | * The index or main alphabet, found in CLDR main `characters.exemplarCharacters`, |
| 22 | * and reduced to a simple form for creating a sequence. |
| 23 | * |
| 24 | * @param string $code Locale to query. If no entry exists, the fallback |
| 25 | * locales are iterated. |
| 26 | * @return string[] a sequence of symbols |
| 27 | */ |
| 28 | public static function getIndexCharacters( string $code ): array { |
| 29 | $fallbacks = [ |
| 30 | $code, |
| 31 | ...MediaWikiServices::getInstance()->getLanguageFallback()->getAll( $code ) |
| 32 | ]; |
| 33 | foreach ( $fallbacks as $languageCode ) { |
| 34 | $indexCharacters = self::loadLanguage( $languageCode ); |
| 35 | if ( $indexCharacters ) { |
| 36 | return $indexCharacters; |
| 37 | } |
| 38 | } |
| 39 | return []; |
| 40 | } |
| 41 | |
| 42 | /** |
| 43 | * Load alphabets for a particular language. |
| 44 | * |
| 45 | * @param string $code The language to return the list in |
| 46 | * @return string[]|null a list of characters in the language's index alphabet. |
| 47 | */ |
| 48 | private static function loadLanguage( string $code ): ?array { |
| 49 | if ( !array_key_exists( $code, self::$cache ) ) { |
| 50 | $langNameUtils = MediaWikiServices::getInstance()->getLanguageNameUtils(); |
| 51 | |
| 52 | if ( !$langNameUtils->isValidBuiltInCode( $code ) ) { |
| 53 | return null; |
| 54 | } |
| 55 | |
| 56 | $filename = __DIR__ . '/../CldrMain/' . |
| 57 | $langNameUtils->getFileName( 'CldrMain', $code ); |
| 58 | if ( file_exists( $filename ) ) { |
| 59 | $indexCharacters = null; |
| 60 | require $filename; |
| 61 | self::$cache[$code] = $indexCharacters; |
| 62 | } else { |
| 63 | wfDebug( __METHOD__ . ": Unable to load alphabet for $filename\n" ); |
| 64 | } |
| 65 | } |
| 66 | |
| 67 | return self::$cache[$code] ?? null; |
| 68 | } |
| 69 | } |