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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 Wikimedia\Leximorph\Util\JsonLoader; |
| 10 | |
| 11 | /** |
| 12 | * GrammarTransformations |
| 13 | * |
| 14 | * Provides functionality to load and cache grammar transformation rules from JSON files. |
| 15 | * |
| 16 | * @since 1.45 |
| 17 | * @author Doğu Abaris (abaris@null.net) |
| 18 | * @license https://www.gnu.org/copyleft/gpl.html GPL-2.0-or-later |
| 19 | */ |
| 20 | class GrammarTransformations { |
| 21 | |
| 22 | /** |
| 23 | * The paths to the grammar rules JSON files. |
| 24 | */ |
| 25 | private const TRANSFORMATIONS_PATH = __DIR__ . '/../data/grammarTransformations/'; |
| 26 | |
| 27 | /** |
| 28 | * Cached grammar transformations indexed by language code. |
| 29 | * |
| 30 | * @var array<string, array<int|string, mixed>> |
| 31 | */ |
| 32 | private static array $transformationsCache = []; |
| 33 | |
| 34 | /** |
| 35 | * Initializes the GrammarTransformations. |
| 36 | * |
| 37 | * @param string $langCode The language code. |
| 38 | * @param JsonLoader $jsonLoader The json loader to load data |
| 39 | * |
| 40 | * @since 1.45 |
| 41 | */ |
| 42 | public function __construct( |
| 43 | private readonly string $langCode, |
| 44 | private readonly JsonLoader $jsonLoader, |
| 45 | ) { |
| 46 | } |
| 47 | |
| 48 | /** |
| 49 | * Returns grammar transformation rules for the current language. |
| 50 | * |
| 51 | * @since 1.45 |
| 52 | * @return array<int|string, mixed> Grammar transformation rules. |
| 53 | */ |
| 54 | public function getTransformations(): array { |
| 55 | self::$transformationsCache ??= []; |
| 56 | |
| 57 | if ( isset( self::$transformationsCache[$this->langCode] ) ) { |
| 58 | return self::$transformationsCache[$this->langCode]; |
| 59 | } |
| 60 | |
| 61 | $filePath = self::TRANSFORMATIONS_PATH . $this->langCode . '.json'; |
| 62 | $transformations = $this->jsonLoader->load( $filePath, 'grammar transformations' ); |
| 63 | |
| 64 | self::$transformationsCache[$this->langCode] = $transformations; |
| 65 | |
| 66 | return $transformations; |
| 67 | } |
| 68 | } |