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efrain |
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<?php declare(strict_types=1);
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namespace Invoker\ParameterResolver;
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use ReflectionFunctionAbstract;
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/**
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* Dispatches the call to other resolvers until all parameters are resolved.
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*
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* Chain of responsibility pattern.
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*/
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class ResolverChain implements ParameterResolver
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{
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/** @var ParameterResolver[] */
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private $resolvers;
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public function __construct(array $resolvers = [])
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{
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$this->resolvers = $resolvers;
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}
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public function getParameters(
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ReflectionFunctionAbstract $reflection,
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array $providedParameters,
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array $resolvedParameters
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): array {
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$reflectionParameters = $reflection->getParameters();
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foreach ($this->resolvers as $resolver) {
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$resolvedParameters = $resolver->getParameters(
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$reflection,
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$providedParameters,
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$resolvedParameters
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);
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$diff = array_diff_key($reflectionParameters, $resolvedParameters);
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if (empty($diff)) {
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// Stop traversing: all parameters are resolved
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return $resolvedParameters;
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}
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}
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return $resolvedParameters;
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}
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/**
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* Push a parameter resolver after the ones already registered.
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*/
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public function appendResolver(ParameterResolver $resolver): void
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{
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$this->resolvers[] = $resolver;
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}
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/**
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* Insert a parameter resolver before the ones already registered.
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*/
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public function prependResolver(ParameterResolver $resolver): void
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{
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array_unshift($this->resolvers, $resolver);
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}
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}
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