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| 1 | <?php |
| 2 | |
| 3 | namespace MediaWiki\Extension\Scribunto\Engines\LuaCommon; |
| 4 | |
| 5 | use MediaWiki\Extension\Scribunto\ScribuntoException; |
| 6 | use MediaWiki\Extension\Scribunto\ScribuntoModuleBase; |
| 7 | use MediaWiki\Parser\PPFrame; |
| 8 | use MediaWiki\Status\Status; |
| 9 | |
| 10 | class LuaModule extends ScribuntoModuleBase { |
| 11 | /** |
| 12 | * @var mixed |
| 13 | */ |
| 14 | protected $initChunk; |
| 15 | |
| 16 | /** |
| 17 | * @var LuaEngine |
| 18 | */ |
| 19 | protected $engine; |
| 20 | |
| 21 | /** |
| 22 | * @param LuaEngine $engine |
| 23 | * @param string $code |
| 24 | * @param string|bool $chunkName |
| 25 | */ |
| 26 | public function __construct( LuaEngine $engine, $code, $chunkName ) { |
| 27 | parent::__construct( $engine, $code, $chunkName ); |
| 28 | } |
| 29 | |
| 30 | public function validate() { |
| 31 | try { |
| 32 | $this->getInitChunk(); |
| 33 | } catch ( ScribuntoException $e ) { |
| 34 | return $e->toStatus(); |
| 35 | } |
| 36 | return Status::newGood(); |
| 37 | } |
| 38 | |
| 39 | /** |
| 40 | * Get the chunk which, when called, will return the export table. |
| 41 | * @return mixed |
| 42 | */ |
| 43 | public function getInitChunk() { |
| 44 | if ( !$this->initChunk ) { |
| 45 | $this->initChunk = $this->engine->getInterpreter()->loadString( |
| 46 | $this->code, |
| 47 | // Prepending an "=" to the chunk name avoids truncation or a "[string" prefix |
| 48 | '=' . $this->chunkName ); |
| 49 | } |
| 50 | return $this->initChunk; |
| 51 | } |
| 52 | |
| 53 | /** |
| 54 | * Invoke a function within the module. Return the expanded wikitext result. |
| 55 | * |
| 56 | * @param string $name |
| 57 | * @param PPFrame $frame |
| 58 | * @throws ScribuntoException |
| 59 | * @return string|null |
| 60 | */ |
| 61 | public function invoke( $name, $frame ) { |
| 62 | $ret = $this->engine->executeModule( $this->getInitChunk(), $name, $frame ); |
| 63 | |
| 64 | if ( $ret === null ) { |
| 65 | throw $this->engine->newException( |
| 66 | 'scribunto-common-nosuchfunction', [ 'args' => [ $name ] ] |
| 67 | ); |
| 68 | } |
| 69 | if ( !$this->engine->getInterpreter()->isLuaFunction( $ret ) ) { |
| 70 | throw $this->engine->newException( |
| 71 | 'scribunto-common-notafunction', [ 'args' => [ $name ] ] |
| 72 | ); |
| 73 | } |
| 74 | |
| 75 | $result = $this->engine->executeFunctionChunk( $ret, $frame ); |
| 76 | return $result[0] ?? null; |
| 77 | } |
| 78 | } |