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<?php |
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/** |
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* This file is part of the ZBateson\MailMimeParser project. |
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* |
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* @license http://opensource.org/licenses/bsd-license.php BSD |
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*/ |
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namespace ZBateson\MailMimeParser; |
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use Pimple\Container as PimpleContainer; |
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use Pimple\Exception\UnknownIdentifierException; |
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use ReflectionClass; |
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use ReflectionParameter; |
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/** |
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* Automatically configures classes and dependencies. |
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* |
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* Sets up an automatic registration for classes when requested through |
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* Pimple by looking up the class's constructor and arguments. |
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* |
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* @author Zaahid Bateson |
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*/ |
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class Container extends PimpleContainer |
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{ |
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/** |
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* Looks up the type of the passed ReflectionParameter and returns it as a |
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* fully qualified class name as expected by the class's auto registration. |
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* |
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* Null is returned for built-in types. |
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* |
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* @param ReflectionParameter $param |
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* @return string|null |
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*/ |
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private function getParameterClass(ReflectionParameter $param) |
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{ |
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if (method_exists($param, 'getType')) { |
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$type = $param->getType(); |
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if ($type && !$type->isBuiltin()) { |
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return method_exists($type, 'getName') ? $type->getName() : (string) $type; |
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} |
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} elseif ($param->getClass() !== null) { |
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return $param->getClass()->getName(); |
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} |
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return null; |
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} |
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/** |
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* Returns a factory function for the passed class. |
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* |
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* The returned factory method looks up arguments and uses pimple to get an |
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* instance of those types to pass them during construction. |
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* |
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* @param string $class |
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*/ |
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public function autoRegister($class) |
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{ |
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$fn = function ($c) use ($class) { |
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$ref = new ReflectionClass($class); |
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$cargs = ($ref->getConstructor() !== null) ? $ref->getConstructor()->getParameters() : []; |
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$ap = []; |
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foreach ($cargs as $arg) { |
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$name = $arg->getName(); |
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$argClass = $this->getParameterClass($arg); |
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if (!empty($c[$name])) { |
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$ap[] = $c[$name]; |
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} elseif ($argClass !== null && !empty($c[$argClass])) { |
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$ap[] = $c[$argClass]; |
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} else { |
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$ap[] = null; |
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} |
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} |
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$ret = $ref->newInstanceArgs($ap); |
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return $ret; |
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}; |
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$this[$class] = $fn; |
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} |
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/** |
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* Overridden to see if the class can be auto-registered and return true if |
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* it can. |
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* |
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* @param string $id |
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* @return boolean |
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*/ |
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public function offsetExists($id) |
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{ |
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$exists = parent::offsetExists($id); |
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if (!$exists && class_exists($id)) { |
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$this->autoRegister($id); |
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return true; |
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} |
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return $exists; |
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} |
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/** |
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* Overridden to see if the class can be auto-registered and return an |
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* instance if it can. |
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* |
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* @param string $id |
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* @return object |
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* @throws UnknownIdentifierException |
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*/ |
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public function offsetGet($id) |
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{ |
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try { |
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return parent::offsetGet($id); |
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} catch (UnknownIdentifierException $e) { |
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if (class_exists($id)) { |
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$this->autoRegister($id); |
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return parent::offsetGet($id); |
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} |
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throw $e; |
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} |
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} |
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/** |
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* Overridden to see if the class can be auto-registered first before |
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* calling Pimple\Container::extend |
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* |
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* @param string $id |
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* @param callable $callable |
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* @return callable the wrapped $callable |
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*/ |
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public function extend($id, $callable) |
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{ |
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$this->offsetExists($id); |
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return parent::extend($id, $callable); |
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} |
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} |
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zbateson /
mail-mime-parser
