89 lines
2.5 KiB
PHP
89 lines
2.5 KiB
PHP
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<?php
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namespace Illuminate\Support\Traits;
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use Closure;
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use Illuminate\Support\Reflector;
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use ReflectionFunction;
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use RuntimeException;
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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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if (! $types) {
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throw new RuntimeException('The given Closure has no parameters.');
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}
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if ($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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return $types[0];
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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($closure);
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$types = 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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return [$parameter->getName() => Reflector::getParameterClassNames($parameter)];
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})->filter()->values()->all();
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if (empty($types)) {
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throw new RuntimeException('The given Closure has no parameters.');
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}
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if (isset($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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return $types[0];
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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($closure);
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return collect($reflection->getParameters())->mapWithKeys(function ($parameter) {
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if ($parameter->isVariadic()) {
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return [$parameter->getName() => null];
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}
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return [$parameter->getName() => Reflector::getParameterClassName($parameter)];
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})->all();
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}
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}
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