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<?php declare(strict_types=1); |
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/** |
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* @license http://opensource.org/licenses/mit-license.php MIT |
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* @link https://github.com/nicoSWD |
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* @author Nicolas Oelgart <[email protected]> |
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*/ |
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namespace nicoSWD\Rule\TokenStream; |
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use nicoSWD\Rule\Grammar\CallableUserFunctionInterface; |
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use nicoSWD\Rule\TokenStream\Token\BaseToken; |
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use nicoSWD\Rule\TokenStream\Token\TokenFactory; |
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final class CallableUserMethod implements CallableUserFunctionInterface |
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{ |
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/** @var TokenFactory */ |
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private $tokenFactory; |
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/** @var callable */ |
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private $callable; |
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/** @var string[] */ |
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private $methodPrefixes = ['get', 'is', '', 'get_', 'is_']; |
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public function __construct(BaseToken $token, TokenFactory $tokenFactory, string $methodName) |
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{ |
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$this->tokenFactory = $tokenFactory; |
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$this->callable = $this->getCallable($token, $methodName); |
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} |
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public function call(BaseToken $param = null): BaseToken |
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{ |
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$callable = $this->callable; |
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return $this->tokenFactory->createFromPHPType( |
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$callable($param) |
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); |
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} |
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private function getCallable(BaseToken $token, string $methodName): callable |
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{ |
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$object = $token->getValue(); |
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if (property_exists($object, $methodName)) { |
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return function () use ($object, $methodName) { |
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return $object->{$methodName}; |
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}; |
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} |
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$method = $this->findCallableMethod($object, $methodName); |
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return function (BaseToken $param = null) use ($method) { |
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if ($param !== null) { |
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return $method($param->getValue()); |
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} |
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return $method(); |
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}; |
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} |
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private function findCallableMethod($object, string $methodName): callable |
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{ |
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$callable = [$object, $methodName]; |
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$index = 0; |
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do { |
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if (!isset($this->methodPrefixes[$index])) { |
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throw new Exception\UndefinedMethodException(); |
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} |
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$callable[1] = $this->methodPrefixes[$index++] . $methodName; |
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} while (!is_callable($callable)); |
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return $callable; |
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} |
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} |
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nicoSWD /
php-rule-parser
