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<?php |
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declare(strict_types=1); |
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namespace Cascader; |
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use BetterReflection\Reflection\ReflectionClass; |
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use BetterReflection\Reflector\Exception\IdentifierNotFound; |
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use Cascader\Exception\InvalidClassException; |
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use Cascader\Exception\InvalidOptionsException; |
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use Cascader\Exception\OptionNotSetException; |
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use BetterReflection\Reflection\ReflectionParameter; |
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use phpDocumentor\Reflection\Types\Object_; |
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class Cascader |
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{ |
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/** |
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* @param string $className |
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* @param array $options |
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* |
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* @throws InvalidClassException |
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* @throws InvalidOptionsException |
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* |
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* @return object |
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*/ |
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public function create(string $className, array $options) |
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{ |
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$reflectionClass = $this->getReflectionClass($className); |
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$options = Options::fromArray($options); |
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$arguments = $this->marshalArguments($reflectionClass, $options); |
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return new $className(...$arguments); |
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} |
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protected function getReflectionClass(string $className) |
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{ |
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try { |
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$reflectionClass = ReflectionClass::createFromName($className); |
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} catch (IdentifierNotFound $ex) { |
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throw InvalidClassException::forNonExistingClass($className); |
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} |
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if (! $reflectionClass->isInstantiable()) { |
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throw InvalidClassException::forNonInstantiableClass($className); |
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} |
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return $reflectionClass; |
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} |
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protected function marshalArguments(ReflectionClass $reflectionClass, Options $options) : array |
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{ |
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if (! $reflectionClass->hasMethod('__construct')) { |
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return []; |
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} |
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$arguments = []; |
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$constructorParameters = $reflectionClass->getConstructor()->getParameters(); |
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foreach ($constructorParameters as $parameter) { |
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$arguments[] = $this->resolveArgument($parameter, $options); |
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} |
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return $arguments; |
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} |
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protected function resolveArgument(ReflectionParameter $parameter, Options $options) |
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{ |
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try { |
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$argument = $options->get($parameter->getName()); |
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if (null !== ($parameterType = $parameter->getType())) { |
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$parameterTypeObject = $parameterType->getTypeObject(); |
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if (is_array($argument) && $parameterTypeObject instanceof Object_) { |
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$argument = $this->create((string) $parameterTypeObject->getFqsen(), $argument); |
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} |
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} |
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return $argument; |
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} catch (OptionNotSetException $ex) { |
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if (! $parameter->isOptional()) { |
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throw InvalidOptionsException::forMissingMandatoryParameter($parameter); |
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} |
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return $parameter->getDefaultValue(); |
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} |
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} |
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} |
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