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@category Introspection */\n\nimport { devAssert } from '../jsutils/devAssert.ts';\nimport { inspect } from '../jsutils/inspect.ts';\nimport { isObjectLike } from '../jsutils/isObjectLike.ts';\nimport { keyValMap } from '../jsutils/keyValMap.ts';\n\nimport { parseConstValue } from '../language/parser.ts';\n\nimport type {\n  GraphQLFieldConfig,\n  GraphQLFieldConfigMap,\n  GraphQLNamedType,\n  GraphQLType,\n} from '../type/definition.ts';\nimport {\n  assertInterfaceType,\n  assertNullableType,\n  assertObjectType,\n  GraphQLEnumType,\n  GraphQLInputObjectType,\n  GraphQLInterfaceType,\n  GraphQLList,\n  GraphQLNonNull,\n  GraphQLObjectType,\n  GraphQLScalarType,\n  GraphQLUnionType,\n  isInputType,\n  isOutputType,\n} from '../type/definition.ts';\nimport { GraphQLDirective } from '../type/directives.ts';\nimport { introspectionTypes, TypeKind } from '../type/introspection.ts';\nimport { specifiedScalarTypes } from '../type/scalars.ts';\nimport type { GraphQLSchemaValidationOptions } from '../type/schema.ts';\nimport { GraphQLSchema } from '../type/schema.ts';\n\nimport type {\n  IntrospectionDirective,\n  IntrospectionEnumType,\n  IntrospectionField,\n  IntrospectionInputObjectType,\n  IntrospectionInputValue,\n  IntrospectionInterfaceType,\n  IntrospectionNamedTypeRef,\n  IntrospectionObjectType,\n  IntrospectionQuery,\n  IntrospectionScalarType,\n  IntrospectionType,\n  IntrospectionTypeRef,\n  IntrospectionUnionType,\n} from './getIntrospectionQuery.ts';\n\n/**\n * Build a GraphQLSchema for use by client tools.\n *\n * Given the result of a client running the introspection query, creates and\n * returns a GraphQLSchema instance which can be then used with all graphql-js\n * tools, but cannot be used to execute a query, as introspection does not\n * represent the \"resolver\", \"parse\" or \"serialize\" functions or any other\n * server-internal mechanisms.\n *\n * This function expects a complete introspection result. Don't forget to check\n * the \"errors\" field of a server response before calling this function.\n * @param introspection - Introspection result data to build from.\n * @param options - Optional configuration for this operation.\n * @returns The client schema represented by the introspection result.\n * @example\n * ```ts\n * import {\n *   buildClientSchema,\n *   introspectionFromSchema,\n *   buildSchema,\n * } from 'graphql/utilities';\n *\n * const schema = buildSchema('type Query { hello: String }');\n * const clientSchema = buildClientSchema(introspectionFromSchema(schema), {\n *   assumeValid: true,\n * });\n *\n * clientSchema.getQueryType().name; // => 'Query'\n * ```\n */\nexport function buildClientSchema(\n  introspection: IntrospectionQuery,\n  options?: GraphQLSchemaValidationOptions,\n): GraphQLSchema {\n  // Even though the `introspection` argument is typed, in most cases it's received\n  // as an untyped value from the server, so we will do an additional check here.\n  devAssert(\n    isObjectLike(introspection) && isObjectLike(introspection.__schema),\n    `Invalid or incomplete introspection result. Ensure that you are passing \"data\" property of introspection response and no \"errors\" was returned alongside: ${inspect(\n      introspection,\n    )}.`,\n  );\n\n  // Get the schema from the introspection result.\n  const schemaIntrospection = introspection.__schema;\n\n  // Iterate through all types, getting the type definition for each.\n  const typeMap = new Map<string, GraphQLNamedType>(\n    schemaIntrospection.types.map((typeIntrospection) => [\n      typeIntrospection.name,\n      buildType(typeIntrospection),\n    ]),\n  );\n\n  // Include standard types only if they are used.\n  for (const stdType of [...specifiedScalarTypes, ...introspectionTypes]) {\n    if (typeMap.has(stdType.name)) {\n      typeMap.set(stdType.name, stdType);\n    }\n  }\n\n  // Get the root Query, Mutation, and Subscription types.\n  const queryType =\n    schemaIntrospection.queryType != null\n      ? getObjectType(schemaIntrospection.queryType)\n      : null;\n\n  const mutationType =\n    schemaIntrospection.mutationType != null\n      ? getObjectType(schemaIntrospection.mutationType)\n      : null;\n\n  const subscriptionType =\n    schemaIntrospection.subscriptionType != null\n      ? getObjectType(schemaIntrospection.subscriptionType)\n      : null;\n\n  // Get the directives supported by Introspection, assuming empty-set if\n  // directives were not queried for.\n  const directives =\n    schemaIntrospection.directives != null\n      ? schemaIntrospection.directives.map(buildDirective)\n      : [];\n\n  // Then produce and return a Schema with these types.\n  return new GraphQLSchema({\n    description: schemaIntrospection.description,\n    query: queryType,\n    mutation: mutationType,\n    subscription: subscriptionType,\n    types: [...typeMap.values()],\n    directives,\n    assumeValid: options?.assumeValid,\n  });\n\n  // Given a type reference in introspection, return the GraphQLType instance.\n  // preferring cached instances before building new instances.\n  function getType(typeRef: IntrospectionTypeRef): GraphQLType {\n    if (typeRef.kind === TypeKind.LIST) {\n      const itemRef = typeRef.ofType;\n      if (itemRef == null) {\n        throw new Error('Decorated type deeper than introspection query.');\n      }\n      return new GraphQLList(getType(itemRef));\n    }\n    if (typeRef.kind === TypeKind.NON_NULL) {\n      const nullableRef = typeRef.ofType;\n      if (nullableRef == null) {\n        throw new Error('Decorated type deeper than introspection query.');\n      }\n      const nullableType = getType(nullableRef);\n      return new GraphQLNonNull(assertNullableType(nullableType));\n    }\n    return getNamedType(typeRef);\n  }\n\n  function getNamedType(typeRef: IntrospectionNamedTypeRef): GraphQLNamedType {\n    const typeName = typeRef.name;\n    if (!typeName) {\n      throw new Error(`Unknown type reference: ${inspect(typeRef)}.`);\n    }\n\n    const type = typeMap.get(typeName);\n    if (type == null) {\n      throw new Error(\n        `Invalid or incomplete schema, unknown type: ${typeName}. Ensure that a full introspection query is used in order to build a client schema.`,\n      );\n    }\n\n    return type;\n  }\n\n  function getObjectType(\n    typeRef: IntrospectionNamedTypeRef<IntrospectionObjectType>,\n  ): GraphQLObjectType {\n    return assertObjectType(getNamedType(typeRef));\n  }\n\n  function getInterfaceType(\n    typeRef: IntrospectionNamedTypeRef<IntrospectionInterfaceType>,\n  ): GraphQLInterfaceType {\n    return assertInterfaceType(getNamedType(typeRef));\n  }\n\n  // Given a type's introspection result, construct the correct\n  // GraphQLType instance.\n  function buildType(type: IntrospectionType): GraphQLNamedType {\n    switch (type.kind) {\n      case TypeKind.SCALAR:\n        return buildScalarDef(type);\n      case TypeKind.OBJECT:\n        return buildObjectDef(type);\n      case TypeKind.INTERFACE:\n        return buildInterfaceDef(type);\n      case TypeKind.UNION:\n        return buildUnionDef(type);\n      case TypeKind.ENUM:\n        return buildEnumDef(type);\n      case TypeKind.INPUT_OBJECT:\n        return buildInputObjectDef(type);\n      default:\n        // TypeScript considers this unreachable, but invalid runtime input can reach it.\n        // Note: we include a default case rather than throwing after the switch to avoid\n        // the use of a @ts-expect-error statement.\n        throw new Error(\n          `Invalid or incomplete introspection result. Ensure that a full introspection query is used in order to build a client schema: ${inspect(\n            type,\n          )}.`,\n        );\n    }\n  }\n\n  function buildScalarDef(\n    scalarIntrospection: IntrospectionScalarType,\n  ): GraphQLScalarType {\n    return new GraphQLScalarType({\n      name: scalarIntrospection.name,\n      description: scalarIntrospection.description,\n      specifiedByURL: scalarIntrospection.specifiedByURL,\n    });\n  }\n\n  function buildImplementationsList(\n    implementingIntrospection:\n      | IntrospectionObjectType\n      | IntrospectionInterfaceType,\n  ): Array<GraphQLInterfaceType> {\n    // TODO: Temporary workaround until GraphQL ecosystem will fully support\n    // 'interfaces' on interface types.\n    if (\n      implementingIntrospection.interfaces === null &&\n      implementingIntrospection.kind === TypeKind.INTERFACE\n    ) {\n      return [];\n    }\n\n    if (implementingIntrospection.interfaces == null) {\n      const implementingIntrospectionStr = inspect(implementingIntrospection);\n      throw new Error(\n        `Introspection result missing interfaces: ${implementingIntrospectionStr}.`,\n      );\n    }\n\n    return implementingIntrospection.interfaces.map(getInterfaceType);\n  }\n\n  function buildObjectDef(\n    objectIntrospection: IntrospectionObjectType,\n  ): GraphQLObjectType {\n    return new GraphQLObjectType({\n      name: objectIntrospection.name,\n      description: objectIntrospection.description,\n      interfaces: () => buildImplementationsList(objectIntrospection),\n      fields: () => buildFieldDefMap(objectIntrospection),\n    });\n  }\n\n  function buildInterfaceDef(\n    interfaceIntrospection: IntrospectionInterfaceType,\n  ): GraphQLInterfaceType {\n    return new GraphQLInterfaceType({\n      name: interfaceIntrospection.name,\n      description: interfaceIntrospection.description,\n      interfaces: () => buildImplementationsList(interfaceIntrospection),\n      fields: () => buildFieldDefMap(interfaceIntrospection),\n    });\n  }\n\n  function buildUnionDef(\n    unionIntrospection: IntrospectionUnionType,\n  ): GraphQLUnionType {\n    if (unionIntrospection.possibleTypes == null) {\n      const unionIntrospectionStr = inspect(unionIntrospection);\n      throw new Error(\n        `Introspection result missing possibleTypes: ${unionIntrospectionStr}.`,\n      );\n    }\n    return new GraphQLUnionType({\n      name: unionIntrospection.name,\n      description: unionIntrospection.description,\n      types: () => unionIntrospection.possibleTypes.map(getObjectType),\n    });\n  }\n\n  function buildEnumDef(\n    enumIntrospection: IntrospectionEnumType,\n  ): GraphQLEnumType {\n    if (enumIntrospection.enumValues == null) {\n      const enumIntrospectionStr = inspect(enumIntrospection);\n      throw new Error(\n        `Introspection result missing enumValues: ${enumIntrospectionStr}.`,\n      );\n    }\n    return new GraphQLEnumType({\n      name: enumIntrospection.name,\n      description: enumIntrospection.description,\n      values: keyValMap(\n        enumIntrospection.enumValues,\n        (valueIntrospection) => valueIntrospection.name,\n        (valueIntrospection) => ({\n          description: valueIntrospection.description,\n          deprecationReason: valueIntrospection.deprecationReason,\n        }),\n      ),\n    });\n  }\n\n  function buildInputObjectDef(\n    inputObjectIntrospection: IntrospectionInputObjectType,\n  ): GraphQLInputObjectType {\n    if (inputObjectIntrospection.inputFields == null) {\n      const inputObjectIntrospectionStr = inspect(inputObjectIntrospection);\n      throw new Error(\n        `Introspection result missing inputFields: ${inputObjectIntrospectionStr}.`,\n      );\n    }\n    return new GraphQLInputObjectType({\n      name: inputObjectIntrospection.name,\n      description: inputObjectIntrospection.description,\n      fields: () => buildInputValueDefMap(inputObjectIntrospection.inputFields),\n      isOneOf: inputObjectIntrospection.isOneOf,\n    });\n  }\n\n  function buildFieldDefMap(\n    typeIntrospection: IntrospectionObjectType | IntrospectionInterfaceType,\n  ): GraphQLFieldConfigMap<unknown, unknown> {\n    if (typeIntrospection.fields == null) {\n      throw new Error(\n        `Introspection result missing fields: ${inspect(typeIntrospection)}.`,\n      );\n    }\n\n    return keyValMap(\n      typeIntrospection.fields,\n      (fieldIntrospection) => fieldIntrospection.name,\n      buildField,\n    );\n  }\n\n  function buildField(\n    fieldIntrospection: IntrospectionField,\n  ): GraphQLFieldConfig<unknown, unknown> {\n    const type = getType(fieldIntrospection.type);\n    if (!isOutputType(type)) {\n      const typeStr = inspect(type);\n      throw new Error(\n        `Introspection must provide output type for fields, but received: ${typeStr}.`,\n      );\n    }\n\n    if (fieldIntrospection.args == null) {\n      const fieldIntrospectionStr = inspect(fieldIntrospection);\n      throw new Error(\n        `Introspection result missing field args: ${fieldIntrospectionStr}.`,\n      );\n    }\n\n    return {\n      description: fieldIntrospection.description,\n      deprecationReason: fieldIntrospection.deprecationReason,\n      type,\n      args: buildInputValueDefMap(fieldIntrospection.args),\n    };\n  }\n\n  function buildInputValueDefMap(\n    inputValueIntrospections: ReadonlyArray<IntrospectionInputValue>,\n  ) {\n    return keyValMap(\n      inputValueIntrospections,\n      (inputValue) => inputValue.name,\n      buildInputValue,\n    );\n  }\n\n  function buildInputValue(inputValueIntrospection: IntrospectionInputValue) {\n    const type = getType(inputValueIntrospection.type);\n    if (!isInputType(type)) {\n      const typeStr = inspect(type);\n      throw new Error(\n        `Introspection must provide input type for arguments, but received: ${typeStr}.`,\n      );\n    }\n\n    return {\n      description: inputValueIntrospection.description,\n      type,\n      default:\n        inputValueIntrospection.defaultValue != null\n          ? { literal: parseConstValue(inputValueIntrospection.defaultValue) }\n          : undefined,\n      deprecationReason: inputValueIntrospection.deprecationReason,\n    };\n  }\n\n  function buildDirective(\n    directiveIntrospection: IntrospectionDirective,\n  ): GraphQLDirective {\n    if (directiveIntrospection.args == null) {\n      const directiveIntrospectionStr = inspect(directiveIntrospection);\n      throw new Error(\n        `Introspection result missing directive args: ${directiveIntrospectionStr}.`,\n      );\n    }\n    if (directiveIntrospection.locations == null) {\n      const directiveIntrospectionStr = inspect(directiveIntrospection);\n      throw new Error(\n        `Introspection result missing directive locations: ${directiveIntrospectionStr}.`,\n      );\n    }\n    return new GraphQLDirective({\n      name: directiveIntrospection.name,\n      description: directiveIntrospection.description,\n      isRepeatable: directiveIntrospection.isRepeatable,\n      deprecationReason: directiveIntrospection.deprecationReason,\n      locations: directiveIntrospection.locations.slice(),\n      args: buildInputValueDefMap(directiveIntrospection.args),\n    });\n  }\n}\n"]}