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| 1 | <?php |
| 2 | /** |
| 3 | * WikiLambda ZObjectRegistry abstract class |
| 4 | * |
| 5 | * @file |
| 6 | * @ingroup Extensions |
| 7 | * @copyright 2020– Abstract Wikipedia team; see AUTHORS.txt |
| 8 | * @license MIT |
| 9 | */ |
| 10 | |
| 11 | namespace MediaWiki\Extension\WikiLambda\Registry; |
| 12 | |
| 13 | abstract class ZObjectRegistry { |
| 14 | |
| 15 | /** |
| 16 | * @var array |
| 17 | */ |
| 18 | protected $registry = []; |
| 19 | |
| 20 | /** |
| 21 | * @var string |
| 22 | */ |
| 23 | protected $type; |
| 24 | |
| 25 | /** |
| 26 | * @var array |
| 27 | */ |
| 28 | private static $instances = []; |
| 29 | |
| 30 | /** |
| 31 | * @codeCoverageIgnore |
| 32 | */ |
| 33 | private function __construct() { |
| 34 | $class = static::class; |
| 35 | if ( !array_key_exists( $class, self::$instances ) ) { |
| 36 | /** |
| 37 | * @codeCoverageIgnore Our test suites always create these first in setUp(), so |
| 38 | * we never run this line in test coverage. |
| 39 | */ |
| 40 | $this->initialize(); |
| 41 | } |
| 42 | } |
| 43 | |
| 44 | final public static function singleton(): static { |
| 45 | $class = static::class; |
| 46 | if ( !array_key_exists( $class, self::$instances ) ) { |
| 47 | // @phan-suppress-next-line PhanTypeInstantiateAbstract |
| 48 | self::$instances[ $class ] = new $class(); |
| 49 | } |
| 50 | return self::$instances[ $class ]; |
| 51 | } |
| 52 | |
| 53 | /** |
| 54 | * Initialize method, to be implemented by every registry class |
| 55 | */ |
| 56 | abstract protected function initialize(): void; |
| 57 | |
| 58 | /** |
| 59 | * Unregisters the zid from any of the existing registry instances |
| 60 | * |
| 61 | * @param string $zid |
| 62 | */ |
| 63 | public static function unregisterZid( string $zid ) { |
| 64 | foreach ( self::$instances as $class => $registry ) { |
| 65 | $registry->unregister( $zid ); |
| 66 | } |
| 67 | } |
| 68 | |
| 69 | /** |
| 70 | * Clears and re-initializes all existing registry instances |
| 71 | */ |
| 72 | public static function clearAll(): void { |
| 73 | foreach ( self::$instances as $class => $registry ) { |
| 74 | $registry->clear(); |
| 75 | } |
| 76 | } |
| 77 | |
| 78 | /** |
| 79 | * Utility method to cache a key value in a registry instance, |
| 80 | * where the key is the Zid of the cached ZObject. (E.g. a ZLangRegistry |
| 81 | * will register the ZLanguage Zid and the language code string as its value) |
| 82 | * |
| 83 | * @param string $zid |
| 84 | * @param string $value |
| 85 | */ |
| 86 | public function register( string $zid, string $value ): void { |
| 87 | $this->registry[ $zid ] = $value; |
| 88 | } |
| 89 | |
| 90 | /** |
| 91 | * Utility method to remove a given Zid from a registry instance |
| 92 | * |
| 93 | * @param string $zid |
| 94 | */ |
| 95 | public function unregister( string $zid ): void { |
| 96 | unset( $this->registry[ $zid ] ); |
| 97 | } |
| 98 | |
| 99 | /** |
| 100 | * Utility method to clear the whole cache of a registry instance and |
| 101 | * set it to initial values. |
| 102 | */ |
| 103 | public function clear(): void { |
| 104 | $this->registry = []; |
| 105 | $this->initialize(); |
| 106 | } |
| 107 | |
| 108 | /** |
| 109 | * Utility method to check if the given Zid is cached in the registry. |
| 110 | * |
| 111 | * @param string $zid |
| 112 | * @return bool |
| 113 | */ |
| 114 | public function isZidCached( string $zid ): bool { |
| 115 | return array_key_exists( $zid, $this->registry ); |
| 116 | } |
| 117 | } |