@graphql-tools/delegate
Version:
A set of utils for faster development of GraphQL tools
73 lines (72 loc) • 3.62 kB
JavaScript
import { responsePathAsArray, locatedError } from 'graphql';
import { AggregateError, getResponseKeyFromInfo, relocatedError } from '@graphql-tools/utils';
import { resolveExternalValue } from './resolveExternalValue.js';
export function checkResultAndHandleErrors(result, delegationContext) {
const { context, info, fieldName: responseKey = getResponseKey(info), subschema, returnType = getReturnType(info), skipTypeMerging, onLocatedError, } = delegationContext;
const { data, unpathedErrors } = mergeDataAndErrors(result.data == null ? undefined : result.data[responseKey], result.errors == null ? [] : result.errors, info != null && info.path ? responsePathAsArray(info.path) : undefined, onLocatedError);
return resolveExternalValue(data, unpathedErrors, subschema, context, info, returnType, skipTypeMerging);
}
export function mergeDataAndErrors(data, errors, path, onLocatedError, index = 1) {
var _a;
if (data == null) {
if (!errors.length) {
return { data: null, unpathedErrors: [] };
}
if (errors.length === 1) {
const error = onLocatedError ? onLocatedError(errors[0]) : errors[0];
const newPath = path === undefined ? error.path : !error.path ? path : path.concat(error.path.slice(1));
return { data: relocatedError(errors[0], newPath), unpathedErrors: [] };
}
// 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
const combinedError = new AggregateError(errors, errors.map(error => error.message).join(', \n'));
const newError = locatedError(combinedError, undefined, path);
return { data: newError, unpathedErrors: [] };
}
if (!errors.length) {
return { data, unpathedErrors: [] };
}
const unpathedErrors = [];
const errorMap = new Map();
for (const error of errors) {
const pathSegment = (_a = error.path) === null || _a === void 0 ? void 0 : _a[index];
if (pathSegment != null) {
let pathSegmentErrors = errorMap.get(pathSegment);
if (pathSegmentErrors === undefined) {
pathSegmentErrors = [error];
errorMap.set(pathSegment, pathSegmentErrors);
}
else {
pathSegmentErrors.push(error);
}
}
else {
unpathedErrors.push(error);
}
}
for (const [pathSegment, pathSegmentErrors] of errorMap) {
if (data[pathSegment] !== undefined) {
const { data: newData, unpathedErrors: newErrors } = mergeDataAndErrors(data[pathSegment], pathSegmentErrors, path, onLocatedError, index + 1);
data[pathSegment] = newData;
unpathedErrors.push(...newErrors);
}
else {
unpathedErrors.push(...pathSegmentErrors);
}
}
return { data, unpathedErrors };
}
function getResponseKey(info) {
if (info == null) {
throw new Error(`Data cannot be extracted from result without an explicit key or source schema.`);
}
return getResponseKeyFromInfo(info);
}
function getReturnType(info) {
if (info == null) {
throw new Error(`Return type cannot be inferred without a source schema.`);
}
return info.returnType;
}