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<?php |
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|
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namespace FluentCommunity\Framework\Support; |
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|
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use Closure; |
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use RuntimeException; |
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use ReflectionFunction; |
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use FluentCommunity\Framework\Support\Helper; |
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use FluentCommunity\Framework\Support\Reflector; |
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|
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trait ReflectsClosures |
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{ |
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/** |
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* Get the class name of the first parameter of the given Closure. |
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* |
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* @param \Closure $closure |
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* @return string |
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* |
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* @throws \ReflectionException |
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* @throws \RuntimeException |
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*/ |
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protected function firstClosureParameterType(Closure $closure) |
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{ |
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$types = array_values($this->closureParameterTypes($closure)); |
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|
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if (! $types) { |
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throw new RuntimeException('The given Closure has no parameters.'); |
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} |
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|
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if ($types[0] === null) { |
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throw new RuntimeException('The first parameter of the given Closure is missing a type hint.'); |
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} |
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|
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return $types[0]; |
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} |
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|
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/** |
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* Get the class names of the first parameter of the given Closure, including union types. |
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* |
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* @param \Closure $closure |
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* @return array |
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* |
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* @throws \ReflectionException |
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* @throws \RuntimeException |
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*/ |
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protected function firstClosureParameterTypes(Closure $closure) |
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{ |
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$reflection = new ReflectionFunction($closure); |
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|
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$types = Helper::collect($reflection->getParameters())->mapWithKeys(function ($parameter) { |
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if ($parameter->isVariadic()) { |
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return [$parameter->getName() => null]; |
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} |
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|
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return [$parameter->getName() => Reflector::getParameterClassNames($parameter)]; |
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})->filter()->values()->all(); |
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|
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if (empty($types)) { |
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throw new RuntimeException('The given Closure has no parameters.'); |
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} |
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|
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if (isset($types[0]) && empty($types[0])) { |
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throw new RuntimeException('The first parameter of the given Closure is missing a type hint.'); |
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} |
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|
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return $types[0]; |
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} |
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|
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/** |
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* Get the class names / types of the parameters of the given Closure. |
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* |
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* @param \Closure $closure |
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* @return array |
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* |
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* @throws \ReflectionException |
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*/ |
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protected function closureParameterTypes(Closure $closure) |
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{ |
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$reflection = new ReflectionFunction($closure); |
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|
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return Helper::collect($reflection->getParameters())->mapWithKeys(function ($parameter) { |
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if ($parameter->isVariadic()) { |
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return [$parameter->getName() => null]; |
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} |
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|
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return [$parameter->getName() => Reflector::getParameterClassName($parameter)]; |
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})->all(); |
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} |
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} |
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