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<?php |
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namespace Http\HttplugBundle; |
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use Puli\Discovery\Api\Discovery; |
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use Puli\Discovery\Binding\ClassBinding; |
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use Webmozart\Expression\Expr; |
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/** |
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* This class is a wrapper around Puli discovery. |
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* |
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* @author Márk Sági-Kazár <[email protected]> |
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*/ |
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final class HttplugFactory |
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{ |
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/** |
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* @var Discovery |
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*/ |
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private $discovery; |
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/** |
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* @param Discovery $discovery |
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*/ |
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public function __construct(Discovery $discovery) |
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{ |
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$this->discovery = $discovery; |
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} |
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/** |
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* Creates a class of type. |
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* |
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* @param string $type |
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* |
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* @return object |
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*/ |
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public function find($type) |
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{ |
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$class = $this->findOneByType($type); |
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return new $class(); |
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} |
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/** |
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* Finds a class of type and resolves optional dependency conditions. |
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* |
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* @param string $type |
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* |
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* @return string |
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* |
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* @throws \RuntimeException if no class is found. |
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*/ |
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private function findOneByType($type) |
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{ |
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/** @var ClassBinding[] $bindings */ |
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$bindings = $this->discovery->findBindings( |
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$type, |
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Expr::isInstanceOf('Puli\Discovery\Binding\ClassBinding') |
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); |
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foreach ($bindings as $binding) { |
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if ($binding->hasParameterValue('depends')) { |
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$dependency = $binding->getParameterValue('depends'); |
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if (false === $this->evaluateCondition($dependency)) { |
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continue; |
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} |
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} |
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return $binding->getClassName(); |
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} |
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throw new \RuntimeException(sprintf('Class binding of type "%s" is not found', $type)); |
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} |
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/** |
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* Evaluates conditions to boolean. |
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* |
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* @param mixed $condition |
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* |
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* @return bool |
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*/ |
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protected function evaluateCondition($condition) |
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{ |
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if (is_string($condition)) { |
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// Should be extended for functions, extensions??? |
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return class_exists($condition); |
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} elseif (is_callable($condition)) { |
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return $condition(); |
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} elseif (is_bool($condition)) { |
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return $condition; |
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} elseif (is_array($condition)) { |
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$evaluatedCondition = true; |
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// Immediately stop execution if the condition is false |
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while (count($condition) > 0 && $evaluatedCondition) { |
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$evaluatedCondition = $this->evaluateCondition(array_shift($condition)); |
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} |
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return $evaluatedCondition; |
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} |
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return false; |
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} |
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} |
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php-http /
HttplugBundle
