graphql/validation/rules/PossibleTypeExtensionsRule.mjs.map

A Query Language and Runtime which can target any service.

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// => 'PossibleTypeExtensionsRule'\n * buildSchema(invalidSDL); // throws an error\n *\n * const validSDL = `\n *   type Query { name: String } extend type Query { other: String }\n * `;\n *\n * buildSchema(validSDL); // does not throw\n * ```\n */\nexport function PossibleTypeExtensionsRule(\n  context: SDLValidationContext,\n): ASTVisitor {\n  const schema = context.getSchema();\n  const definedTypes = new Map<string, TypeDefinitionNode>();\n\n  for (const def of context.getDocument().definitions) {\n    if (isTypeDefinitionNode(def)) {\n      definedTypes.set(def.name.value, def);\n    }\n  }\n\n  return {\n    ScalarTypeExtension: checkExtension,\n    ObjectTypeExtension: checkExtension,\n    InterfaceTypeExtension: checkExtension,\n    UnionTypeExtension: checkExtension,\n    EnumTypeExtension: checkExtension,\n    InputObjectTypeExtension: checkExtension,\n  };\n\n  function checkExtension(node: TypeExtensionNode): void {\n    const typeName = node.name.value;\n    const defNode = definedTypes.get(typeName);\n    const existingType = schema?.getType(typeName);\n\n    let expectedKind: Kind | undefined;\n    if (defNode != null) {\n      expectedKind = defKindToExtKind[defNode.kind];\n    } else if (existingType) {\n      expectedKind = typeToExtKind(existingType);\n    }\n\n    if (expectedKind != null) {\n      if (expectedKind !== node.kind) {\n        const kindStr = extensionKindToTypeName(node.kind);\n        context.reportError(\n          new GraphQLError(`Cannot extend non-${kindStr} type \"${typeName}\".`, {\n            nodes: defNode ? [defNode, node] : node,\n          }),\n        );\n      }\n    } else {\n      const allTypeNames = [\n        ...definedTypes.keys(),\n        ...Object.keys(schema?.getTypeMap() ?? {}),\n      ];\n\n      context.reportError(\n        new GraphQLError(\n          `Cannot extend type \"${typeName}\" because it is not defined.` +\n            didYouMean(suggestionList(typeName, allTypeNames)),\n          { nodes: node.name },\n        ),\n      );\n    }\n  }\n}\n\nconst defKindToExtKind = {\n  [Kind.SCALAR_TYPE_DEFINITION]: Kind.SCALAR_TYPE_EXTENSION,\n  [Kind.OBJECT_TYPE_DEFINITION]: Kind.OBJECT_TYPE_EXTENSION,\n  [Kind.INTERFACE_TYPE_DEFINITION]: Kind.INTERFACE_TYPE_EXTENSION,\n  [Kind.UNION_TYPE_DEFINITION]: Kind.UNION_TYPE_EXTENSION,\n  [Kind.ENUM_TYPE_DEFINITION]: Kind.ENUM_TYPE_EXTENSION,\n  [Kind.INPUT_OBJECT_TYPE_DEFINITION]: Kind.INPUT_OBJECT_TYPE_EXTENSION,\n} as const;\n\nfunction typeToExtKind(type: GraphQLNamedType): Kind {\n  if (isScalarType(type)) {\n    return Kind.SCALAR_TYPE_EXTENSION;\n  }\n  if (isObjectType(type)) {\n    return Kind.OBJECT_TYPE_EXTENSION;\n  }\n  if (isInterfaceType(type)) {\n    return Kind.INTERFACE_TYPE_EXTENSION;\n  }\n  if (isUnionType(type)) {\n    return Kind.UNION_TYPE_EXTENSION;\n  }\n  if (isEnumType(type)) {\n    return Kind.ENUM_TYPE_EXTENSION;\n  }\n  if (isInputObjectType(type)) {\n    return Kind.INPUT_OBJECT_TYPE_EXTENSION;\n    /* node:coverage ignore next 4 */\n  }\n  // Not reachable. All possible types have been considered\n  invariant(false, 'Unexpected type: ' + inspect(type));\n}\n\nfunction extensionKindToTypeName(kind: Kind): string {\n  switch (kind) {\n    case Kind.SCALAR_TYPE_EXTENSION:\n      return 'scalar';\n    case Kind.OBJECT_TYPE_EXTENSION:\n      return 'object';\n    case Kind.INTERFACE_TYPE_EXTENSION:\n      return 'interface';\n    case Kind.UNION_TYPE_EXTENSION:\n      return 'union';\n    case Kind.ENUM_TYPE_EXTENSION:\n      return 'enum';\n    case Kind.INPUT_OBJECT_TYPE_EXTENSION:\n      return 'input object';\n    // Not reachable. All possible types have been considered\n    /* node:coverage ignore next 2 */\n    default:\n      invariant(false, 'Unexpected kind: ' + inspect(kind));\n  }\n}\n"]}