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| 1 | <?php |
| 2 | /** |
| 3 | * @license GPL-2.0-or-later |
| 4 | * @file |
| 5 | */ |
| 6 | |
| 7 | namespace Wikimedia\Leximorph\Provider; |
| 8 | |
| 9 | use Psr\Log\LoggerInterface; |
| 10 | use Wikimedia\Leximorph\Util\JsonLoader; |
| 11 | |
| 12 | /** |
| 13 | * FormalityIndex |
| 14 | * |
| 15 | * Loads and caches formality indexes from a JSON file. |
| 16 | * |
| 17 | * @since 1.45 |
| 18 | * @author Doğu Abaris (abaris@null.net) |
| 19 | * @license https://www.gnu.org/copyleft/gpl.html GPL-2.0-or-later |
| 20 | */ |
| 21 | class FormalityIndex { |
| 22 | |
| 23 | /** |
| 24 | * Path to formal indexes JSON file. |
| 25 | */ |
| 26 | private const FORMALITY_INDEXES_PATH = __DIR__ . '/../data/formal-indexes.json'; |
| 27 | |
| 28 | /** |
| 29 | * Cached formality indexes. |
| 30 | * |
| 31 | * @var array<string, int>|null |
| 32 | */ |
| 33 | private static ?array $indexesCache = null; |
| 34 | |
| 35 | /** |
| 36 | * Initializes the FormalityIndex. |
| 37 | * |
| 38 | * @param string $langCode The language code. |
| 39 | * @param LoggerInterface $logger The logger instance to use. |
| 40 | * @param JsonLoader $jsonLoader The json loader to load data |
| 41 | * |
| 42 | * @since 1.45 |
| 43 | */ |
| 44 | public function __construct( |
| 45 | private readonly string $langCode, |
| 46 | private readonly LoggerInterface $logger, |
| 47 | private readonly JsonLoader $jsonLoader, |
| 48 | ) { |
| 49 | } |
| 50 | |
| 51 | /** |
| 52 | * Returns the formality index number for the given language code. |
| 53 | * |
| 54 | * If no entry is found or the entry is not a simple integer, |
| 55 | * we default to 0 (informal). |
| 56 | * |
| 57 | * @since 1.45 |
| 58 | * @return int The formality index (1 for formal, 0 for informal). |
| 59 | */ |
| 60 | public function getFormalityIndex(): int { |
| 61 | self::$indexesCache ??= $this->loadIndexes(); |
| 62 | $indexesCache = self::$indexesCache; |
| 63 | |
| 64 | if ( array_key_exists( $this->langCode, $indexesCache ) ) { |
| 65 | return $indexesCache[$this->langCode]; |
| 66 | } |
| 67 | |
| 68 | if ( str_contains( $this->langCode, '-' ) ) { |
| 69 | $parts = explode( '-', $this->langCode ); |
| 70 | $suffix = array_pop( $parts ); |
| 71 | if ( $suffix === 'formal' ) { |
| 72 | return 1; |
| 73 | } elseif ( $suffix === 'informal' ) { |
| 74 | return 0; |
| 75 | } |
| 76 | |
| 77 | return $indexesCache[implode( '-', $parts )] ?? 0; |
| 78 | } |
| 79 | |
| 80 | return 0; |
| 81 | } |
| 82 | |
| 83 | /** |
| 84 | * Loads formal indexes from JSON. |
| 85 | * |
| 86 | * @since 1.45 |
| 87 | * @return array<string, int> An associative array mapping language codes to formality indexes. |
| 88 | */ |
| 89 | private function loadIndexes(): array { |
| 90 | $rawIndexes = $this->jsonLoader->load( self::FORMALITY_INDEXES_PATH, 'formality indexes' ); |
| 91 | $indexes = []; |
| 92 | |
| 93 | foreach ( $rawIndexes as $key => $value ) { |
| 94 | if ( is_string( $key ) && is_int( $value ) ) { |
| 95 | $indexes[$key] = $value; |
| 96 | } else { |
| 97 | $this->logger->error( |
| 98 | 'Invalid formality index entry. Expected string key and int value. ' . |
| 99 | 'Got key type {keyType}, value type {valueType}.', |
| 100 | [ |
| 101 | 'keyType' => gettype( $key ), |
| 102 | 'valueType' => gettype( $value ), |
| 103 | ] |
| 104 | ); |
| 105 | } |
| 106 | } |
| 107 | |
| 108 | return $indexes; |
| 109 | } |
| 110 | } |