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<?php |
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namespace Digia\GraphQL\Schema\Resolver; |
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use Digia\GraphQL\Execution\ResolveInfo; |
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class ResolverRegistry implements ResolverRegistryInterface |
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{ |
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/** |
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* @var ResolverInterface[] |
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*/ |
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protected $resolverMap; |
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/** |
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* @var ResolverMiddlewareInterface[] |
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*/ |
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protected $middleware; |
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/** |
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* ResolverRegistry constructor. |
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* @param ResolverInterface[] $resolvers |
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* @param ResolverMiddlewareInterface[] $middleware |
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*/ |
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public function __construct(array $resolvers = [], array $middleware = []) |
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{ |
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$this->middleware = $middleware; |
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$this->registerResolvers($resolvers); |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function register(string $typeName, ResolverInterface $resolver): void |
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{ |
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$this->resolverMap[$typeName] = $resolver; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function getFieldResolver(string $typeName, string $fieldName): ?callable |
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{ |
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$resolver = $this->getResolver($typeName); |
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if (null === $resolver) { |
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return null; |
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} |
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$resolver = $resolver instanceof ResolverCollection |
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? $resolver->getResolver($fieldName) |
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: $resolver; |
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$resolveCallback = $resolver instanceof ResolverInterface |
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? $resolver->getResolveCallback() |
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: $resolver; |
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if (!empty($this->middleware)) { |
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return $this->applyMiddleware($resolveCallback, \array_reverse($this->middleware)); |
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} |
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return $resolveCallback; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function getTypeResolver(string $typeName): ?callable |
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{ |
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$resolver = $this->getResolver($typeName); |
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if ($resolver instanceof ResolverInterface) { |
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return $resolver->getTypeResolver(); |
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} |
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return null; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function getResolver(string $typeName): ?ResolverInterface |
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{ |
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return $this->resolverMap[$typeName] ?? null; |
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} |
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/** |
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* @param array $resolvers |
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*/ |
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protected function registerResolvers(array $resolvers): void |
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{ |
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foreach ($resolvers as $typeName => $resolver) { |
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if (\is_array($resolver)) { |
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$resolver = new ResolverCollection($resolver); |
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} |
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$this->register($typeName, $resolver); |
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} |
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} |
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/** |
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* @param callable $resolveCallback |
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* @param array $middleware |
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* @return callable |
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*/ |
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protected function applyMiddleware(callable $resolveCallback, array $middleware): callable |
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{ |
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return \array_reduce( |
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$middleware, |
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function (callable $resolveCallback, ResolverMiddlewareInterface $middleware) { |
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return function ($rootValue, array $args, $contextValues = null, ?ResolveInfo $info = null) use ( |
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$resolveCallback, |
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$middleware |
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) { |
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return $middleware->resolve($resolveCallback, $rootValue, $args, $contextValues, $info); |
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}; |
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}, |
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$resolveCallback |
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); |
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} |
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} |
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digiaonline /
graphql-php
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