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<?php |
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namespace Digia\GraphQL\Schema\Extension; |
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use Digia\GraphQL\Error\ExtensionException; |
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use Digia\GraphQL\Error\InvariantException; |
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use Digia\GraphQL\Language\Node\DirectiveDefinitionNode; |
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use Digia\GraphQL\Language\Node\DocumentNode; |
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use Digia\GraphQL\Language\Node\EnumTypeExtensionNode; |
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use Digia\GraphQL\Language\Node\InputObjectTypeExtensionNode; |
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use Digia\GraphQL\Language\Node\InterfaceTypeExtensionNode; |
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use Digia\GraphQL\Language\Node\NodeInterface; |
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use Digia\GraphQL\Language\Node\ObjectTypeExtensionNode; |
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use Digia\GraphQL\Language\Node\ScalarTypeExtensionNode; |
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use Digia\GraphQL\Language\Node\TypeDefinitionNodeInterface; |
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use Digia\GraphQL\Language\Node\UnionTypeExtensionNode; |
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use Digia\GraphQL\Schema\DefinitionBuilder; |
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use Digia\GraphQL\Schema\SchemaInterface; |
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use Digia\GraphQL\Type\Definition\InterfaceType; |
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use Digia\GraphQL\Type\Definition\ObjectType; |
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use Digia\GraphQL\Type\Definition\TypeInterface; |
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use Psr\SimpleCache\CacheInterface; |
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use Psr\SimpleCache\InvalidArgumentException; |
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use function Digia\GraphQL\Type\newSchema; |
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use function Digia\GraphQL\Util\toString; |
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class SchemaExtender implements SchemaExtenderInterface |
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{ |
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/** |
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* @var CacheInterface |
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*/ |
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protected $cache; |
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/** |
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* BuilderContextCreator constructor. |
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* @param CacheInterface $cache |
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*/ |
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public function __construct(CacheInterface $cache) |
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{ |
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$this->cache = $cache; |
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} |
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/** |
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* @param SchemaInterface $schema |
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* @param DocumentNode $document |
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* @return SchemaInterface |
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* @throws InvariantException |
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* @throws ExtensionException |
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* @throws InvalidArgumentException |
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*/ |
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public function extend(SchemaInterface $schema, DocumentNode $document): SchemaInterface |
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{ |
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$context = $this->createContext($schema, $document); |
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// If this document contains no new types, extensions, or directives then |
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// return the same unmodified GraphQLSchema instance. |
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if (!$context->isSchemaExtended()) { |
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return $schema; |
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} |
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return newSchema([ |
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'query' => $context->getExtendedQueryType(), |
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'mutation' => $context->getExtendedMutationType(), |
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'subscription' => $context->getExtendedSubscriptionType(), |
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'types' => $context->getExtendedTypes(), |
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'directives' => $context->getExtendedDirectives(), |
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'astNode' => $schema->getAstNode(), |
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]); |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function createContext(SchemaInterface $schema, DocumentNode $document): ExtensionContextInterface |
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{ |
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$info = $this->createInfo($schema, $document); |
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// Context has to be created in order to create the definition builder, |
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// because we are using its `resolveType` function to resolve types. |
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$context = new ExtensionContext($info); |
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$definitionBuilder = new DefinitionBuilder( |
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$info->getTypeDefinitionMap(), |
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null, |
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[$context, 'resolveType'], |
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$this->cache |
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); |
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return $context->setDefinitionBuilder($definitionBuilder); |
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} |
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/** |
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* @param SchemaInterface $schema |
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* @param DocumentNode $document |
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* @return ExtendInfo |
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* @throws ExtensionException |
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*/ |
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protected function createInfo(SchemaInterface $schema, DocumentNode $document): ExtendInfo |
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{ |
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$typeDefinitionMap = []; |
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$typeExtensionsMap = []; |
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$directiveDefinitions = []; |
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foreach ($document->getDefinitions() as $definition) { |
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if ($definition instanceof TypeDefinitionNodeInterface) { |
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// Sanity check that none of the defined types conflict with the schema's existing types. |
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$typeName = $definition->getNameValue(); |
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$existingType = $schema->getType($typeName); |
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if (null !== $existingType) { |
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throw new ExtensionException( |
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\sprintf( |
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'Type "%s" already exists in the schema. It cannot also ' . |
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'be defined in this type definition.', |
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$typeName |
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), |
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[$definition] |
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); |
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} |
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$typeDefinitionMap[$typeName] = $definition; |
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continue; |
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} |
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if ($definition instanceof ObjectTypeExtensionNode || $definition instanceof InterfaceTypeExtensionNode) { |
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// Sanity check that this type extension exists within the schema's existing types. |
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$extendedTypeName = $definition->getNameValue(); |
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$existingType = $schema->getType($extendedTypeName); |
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if (null === $existingType) { |
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throw new ExtensionException( |
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\sprintf( |
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'Cannot extend type "%s" because it does not exist in the existing schema.', |
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$extendedTypeName |
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), |
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[$definition] |
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); |
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} |
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$this->checkExtensionNode($existingType, $definition); |
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$typeExtensionsMap[$extendedTypeName] = \array_merge( |
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$typeExtensionsMap[$extendedTypeName] ?? [], |
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[$definition] |
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); |
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continue; |
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} |
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if ($definition instanceof DirectiveDefinitionNode) { |
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$directiveName = $definition->getNameValue(); |
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$existingDirective = $schema->getDirective($directiveName); |
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if (null !== $existingDirective) { |
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throw new ExtensionException( |
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\sprintf( |
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'Directive "%s" already exists in the schema. It cannot be redefined.', |
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$directiveName |
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), |
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[$definition] |
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); |
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} |
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$directiveDefinitions[] = $definition; |
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continue; |
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} |
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if ($definition instanceof ScalarTypeExtensionNode || |
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$definition instanceof UnionTypeExtensionNode || |
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$definition instanceof EnumTypeExtensionNode || |
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$definition instanceof InputObjectTypeExtensionNode) { |
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throw new ExtensionException( |
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\sprintf('The %s kind is not yet supported by extendSchema().', $definition->getKind()) |
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); |
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} |
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} |
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return new ExtendInfo( |
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$schema, |
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$document, |
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$typeDefinitionMap, |
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$typeExtensionsMap, |
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$directiveDefinitions |
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); |
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} |
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/** |
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* @param TypeInterface $type |
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* @param NodeInterface $node |
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* @throws ExtensionException |
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*/ |
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protected function checkExtensionNode(TypeInterface $type, NodeInterface $node): void |
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{ |
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if ($node instanceof ObjectTypeExtensionNode && !($type instanceof ObjectType)) { |
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throw new ExtensionException( |
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\sprintf('Cannot extend non-object type "%s".', toString($type)), |
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[$node] |
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); |
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} |
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if ($node instanceof InterfaceTypeExtensionNode && !($type instanceof InterfaceType)) { |
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throw new ExtensionException( |
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\sprintf('Cannot extend non-interface type "%s".', toString($type)), |
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[$node] |
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); |
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} |
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} |
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} |
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digiaonline /
graphql-php
