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<?php |
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/* |
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* This file is part of the OverblogGraphQLBundle package. |
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* |
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* (c) Overblog <http://github.com/overblog/> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace Overblog\GraphQLBundle\Resolver; |
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use GraphQL\Schema; |
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use GraphQL\Type\Definition\Type; |
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use Overblog\GraphQLBundle\Resolver\Cache\ArrayCache; |
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use Overblog\GraphQLBundle\Resolver\Cache\CacheInterface; |
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use Symfony\Component\DependencyInjection\ContainerAwareInterface; |
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use Symfony\Component\DependencyInjection\ContainerAwareTrait; |
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class TypeResolver extends AbstractResolver implements ContainerAwareInterface, TypeResolverInterface |
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{ |
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use ContainerAwareTrait; |
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/** |
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* @var CacheInterface |
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*/ |
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private $cache; |
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/** |
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* @var array |
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*/ |
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private $mapping; |
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/** |
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* @var Schema |
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*/ |
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private $schema; |
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public function __construct(CacheInterface $cache = null) |
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{ |
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$this->cache = null !== $cache ? $cache : new ArrayCache(); |
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} |
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/** |
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* @param array $mapping |
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* |
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* @return TypeResolver |
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*/ |
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public function setMapping(array $mapping) |
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{ |
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$this->mapping = $mapping; |
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return $this; |
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} |
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/** |
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* @param Schema $schema |
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* |
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* @return TypeResolver |
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*/ |
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public function setSchema(Schema $schema) |
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{ |
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$this->schema = $schema; |
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} |
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/** |
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* @param string $alias |
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* |
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* @return \GraphQL\Type\Definition\Type |
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*/ |
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public function resolve($alias) |
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{ |
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if (null === $alias) { |
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return; |
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} |
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if (null !== $type = $this->cache->fetch($alias)) { |
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return $type; |
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} |
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$type = $this->string2Type($alias); |
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$this->cache->save($alias, $type); |
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return $type; |
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} |
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private function string2Type($alias) |
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{ |
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if (false !== ($type = $this->wrapTypeIfNeeded($alias))) { |
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return $type; |
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} |
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return $this->baseType($alias); |
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} |
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private function baseType($alias) |
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{ |
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$baseTypeResolvers = [ |
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'baseTypeUsingSchema', // first search in schema if type exists |
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'getSolution', // then in register solutions |
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'baseTypeUsingContainer', // fallback using mapped services |
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]; |
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foreach ($baseTypeResolvers as $method) { |
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$type = $this->$method($alias); |
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if (null !== $type) { |
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return $type; |
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} |
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} |
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throw new UnresolvableException( |
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sprintf('Unknown type with alias "%s" (verified service tag)', $alias) |
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); |
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} |
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private function baseTypeUsingSchema($alias) |
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{ |
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if (null !== $this->schema) { |
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return $this->schema->getType($alias); |
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} |
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} |
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private function baseTypeUsingContainer($alias) |
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{ |
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if (null !== $this->container && isset($this->mapping[$alias])) { |
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$options = $this->mapping[$alias]; |
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return $this->container->get($options['id']); |
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} |
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} |
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private function wrapTypeIfNeeded($alias) |
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{ |
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// Non-Null |
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if ('!' === $alias[strlen($alias) - 1]) { |
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return Type::nonNull($this->string2Type(substr($alias, 0, -1))); |
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} |
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// List |
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if ($this->hasNeedListOfWrapper($alias)) { |
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return Type::listOf($this->string2Type(substr($alias, 1, -1))); |
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} |
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return false; |
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} |
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private function hasNeedListOfWrapper($alias) |
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{ |
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if ('[' === $alias[0]) { |
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$got = $alias[strlen($alias) - 1]; |
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if (']' !== $got) { |
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throw new UnresolvableException( |
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sprintf('Malformed ListOf wrapper type "%s" expected "]" but got .', $alias, json_encode($got)) |
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); |
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} |
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return true; |
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} |
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return false; |
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} |
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protected function supportedSolutionClass() |
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{ |
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return 'GraphQL\\Type\\Definition\\Type'; |
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} |
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} |
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overblog /
GraphQLBundle
