@graphql-tools/delegate
Version:
A set of utils for faster development of GraphQL tools
90 lines (89 loc) • 4.36 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.resolveExternalValue = void 0;
const graphql_1 = require("graphql");
const utils_1 = require("@graphql-tools/utils");
const mergeFields_js_1 = require("./mergeFields.js");
function resolveExternalValue(result, unpathedErrors, subschema, context, info, returnType = getReturnType(info), skipTypeMerging) {
const type = (0, graphql_1.getNullableType)(returnType);
if (result instanceof Error) {
return result;
}
if (result == null) {
return reportUnpathedErrorsViaNull(unpathedErrors);
}
if ('parseValue' in type) {
return type.parseValue(result);
}
else if ((0, graphql_1.isCompositeType)(type)) {
return resolveExternalObject(type, result, unpathedErrors, subschema, context, info, skipTypeMerging);
}
else if ((0, graphql_1.isListType)(type)) {
if (Array.isArray(result)) {
return resolveExternalList(type, result, unpathedErrors, subschema, context, info, skipTypeMerging);
}
return resolveExternalValue(result, unpathedErrors, subschema, context, info, type.ofType, skipTypeMerging);
}
}
exports.resolveExternalValue = resolveExternalValue;
function resolveExternalObject(type, object, unpathedErrors, subschema, context, info, skipTypeMerging) {
var _a;
// if we have already resolved this object, for example, when the identical object appears twice
// in a list, see https://github.com/ardatan/graphql-tools/issues/2304
if (!(0, mergeFields_js_1.isExternalObject)(object)) {
(0, mergeFields_js_1.annotateExternalObject)(object, unpathedErrors, subschema, Object.create(null));
}
if (skipTypeMerging || info == null) {
return object;
}
const stitchingInfo = (_a = info.schema.extensions) === null || _a === void 0 ? void 0 : _a['stitchingInfo'];
if (stitchingInfo == null) {
return object;
}
const typeName = (0, graphql_1.isAbstractType)(type) ? object.__typename : type.name;
const mergedTypeInfo = stitchingInfo.mergedTypes[typeName];
let targetSubschemas;
// Within the stitching context, delegation to a stitched GraphQLSchema or SubschemaConfig
// will be redirected to the appropriate Subschema object, from which merge targets can be queried.
if (mergedTypeInfo != null) {
targetSubschemas = mergedTypeInfo.targetSubschemas.get(subschema);
}
// If there are no merge targets from the subschema, return.
if (!targetSubschemas || !targetSubschemas.length) {
return object;
}
return (0, mergeFields_js_1.mergeFields)(mergedTypeInfo, object, subschema, context, info);
}
function resolveExternalList(type, list, unpathedErrors, subschema, context, info, skipTypeMerging) {
return list.map(listMember => resolveExternalValue(listMember, unpathedErrors, subschema, context, info, type.ofType, skipTypeMerging));
}
const reportedErrors = new WeakMap();
function reportUnpathedErrorsViaNull(unpathedErrors) {
if (unpathedErrors.length) {
const unreportedErrors = [];
for (const error of unpathedErrors) {
if (!reportedErrors.has(error)) {
unreportedErrors.push(error);
reportedErrors.set(error, true);
}
}
if (unreportedErrors.length) {
if (unreportedErrors.length === 1) {
return unreportedErrors[0];
}
const combinedError = new utils_1.AggregateError(unreportedErrors, unreportedErrors.map(error => error.message).join(', \n'));
// We cast path as any for GraphQL.js 14 compat
// locatedError path argument must be defined, but it is just forwarded to a constructor that allows a undefined value
// https://github.com/graphql/graphql-js/blob/b4bff0ba9c15c9d7245dd68556e754c41f263289/src/error/locatedError.js#L25
// https://github.com/graphql/graphql-js/blob/b4bff0ba9c15c9d7245dd68556e754c41f263289/src/error/GraphQLError.js#L19
return (0, graphql_1.locatedError)(combinedError, undefined, unreportedErrors[0].path);
}
}
return null;
}
function getReturnType(info) {
if (info == null) {
throw new Error(`Return type cannot be inferred without a source schema.`);
}
return info.returnType;
}