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| 1 | <?php |
| 2 | |
| 3 | namespace MediaWiki\Debug; |
| 4 | |
| 5 | use ArrayAccess; |
| 6 | |
| 7 | /** |
| 8 | * ArrayAccess with support for deprecating access to certain offsets. |
| 9 | * |
| 10 | * It behaves mostly as a normal array, however in order to avoid instantiating |
| 11 | * deprecated properties by default, a callable initializer can be set to the property. |
| 12 | * It will be executed upon 'get'. |
| 13 | * @note Setting properties does not emit deprecation warnings. |
| 14 | * |
| 15 | * @newable |
| 16 | * @since 1.35 |
| 17 | */ |
| 18 | class DeprecatablePropertyArray implements ArrayAccess { |
| 19 | |
| 20 | /** @var array */ |
| 21 | private $container; |
| 22 | |
| 23 | /** @var array Map of deprecated property names to deprecation versions */ |
| 24 | private $deprecatedProperties; |
| 25 | |
| 26 | /** @var string */ |
| 27 | private $name; |
| 28 | |
| 29 | /** @var string|null */ |
| 30 | private $component; |
| 31 | |
| 32 | /** |
| 33 | * @param array $initializer Initial value of the array. |
| 34 | * @param array $deprecatedProperties Map of deprecated property names to versions. |
| 35 | * @param string $name Descriptive identifier for the array |
| 36 | * @param string|null $component Component to which array belongs. |
| 37 | * If not provided, assumed to be MW Core |
| 38 | */ |
| 39 | public function __construct( |
| 40 | array $initializer, |
| 41 | array $deprecatedProperties, |
| 42 | string $name, |
| 43 | ?string $component = null |
| 44 | ) { |
| 45 | $this->container = $initializer; |
| 46 | $this->deprecatedProperties = $deprecatedProperties; |
| 47 | $this->name = $name; |
| 48 | $this->component = $component; |
| 49 | } |
| 50 | |
| 51 | public function offsetExists( $offset ): bool { |
| 52 | $this->checkDeprecatedAccess( $offset, 'exists' ); |
| 53 | return isset( $this->container[$offset] ); |
| 54 | } |
| 55 | |
| 56 | #[\ReturnTypeWillChange] |
| 57 | public function offsetGet( $offset ) { |
| 58 | if ( $this->checkDeprecatedAccess( $offset, 'get' ) ) { |
| 59 | if ( is_callable( $this->container[$offset] ) ) { |
| 60 | $this->container[$offset] = call_user_func( $this->container[$offset] ); |
| 61 | } |
| 62 | } |
| 63 | return $this->container[$offset] ?? null; |
| 64 | } |
| 65 | |
| 66 | public function offsetSet( $offset, $value ): void { |
| 67 | if ( $offset === null ) { |
| 68 | $this->container[] = $value; |
| 69 | } else { |
| 70 | $this->container[$offset] = $value; |
| 71 | } |
| 72 | } |
| 73 | |
| 74 | public function offsetUnset( $offset ): void { |
| 75 | $this->checkDeprecatedAccess( $offset, 'unset' ); |
| 76 | unset( $this->container[$offset] ); |
| 77 | } |
| 78 | |
| 79 | /** |
| 80 | * @param string|int $offset |
| 81 | * @param string $fname |
| 82 | * @return bool |
| 83 | */ |
| 84 | private function checkDeprecatedAccess( $offset, string $fname ): bool { |
| 85 | if ( array_key_exists( $offset, $this->deprecatedProperties ) ) { |
| 86 | $deprecatedVersion = $this->deprecatedProperties[$offset]; |
| 87 | wfDeprecated( |
| 88 | "{$this->name} {$fname} '{$offset}'", |
| 89 | $deprecatedVersion, |
| 90 | $this->component ?? false, |
| 91 | 3 |
| 92 | ); |
| 93 | return true; |
| 94 | } |
| 95 | return false; |
| 96 | } |
| 97 | } |