@graphql-tools/delegate
Version:
A set of utils for faster development of GraphQL tools
88 lines (87 loc) • 4.6 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.mergeFields = exports.getUnpathedErrors = exports.getSubschema = exports.annotateExternalObject = exports.isExternalObject = void 0;
const graphql_1 = require("graphql");
const utils_1 = require("@graphql-tools/utils");
const symbols_js_1 = require("./symbols.js");
function isExternalObject(data) {
return data[symbols_js_1.UNPATHED_ERRORS_SYMBOL] !== undefined;
}
exports.isExternalObject = isExternalObject;
function annotateExternalObject(object, errors, subschema, subschemaMap) {
Object.defineProperties(object, {
[symbols_js_1.OBJECT_SUBSCHEMA_SYMBOL]: { value: subschema },
[symbols_js_1.FIELD_SUBSCHEMA_MAP_SYMBOL]: { value: subschemaMap },
[symbols_js_1.UNPATHED_ERRORS_SYMBOL]: { value: errors },
});
return object;
}
exports.annotateExternalObject = annotateExternalObject;
function getSubschema(object, responseKey) {
var _a;
return (_a = object[symbols_js_1.FIELD_SUBSCHEMA_MAP_SYMBOL][responseKey]) !== null && _a !== void 0 ? _a : object[symbols_js_1.OBJECT_SUBSCHEMA_SYMBOL];
}
exports.getSubschema = getSubschema;
function getUnpathedErrors(object) {
return object[symbols_js_1.UNPATHED_ERRORS_SYMBOL];
}
exports.getUnpathedErrors = getUnpathedErrors;
const EMPTY_ARRAY = [];
const EMPTY_OBJECT = Object.create(null);
async function mergeFields(mergedTypeInfo, object, sourceSubschema, context, info) {
var _a;
const delegationMaps = mergedTypeInfo.delegationPlanBuilder(info.schema, sourceSubschema, info.variableValues != null && Object.keys(info.variableValues).length > 0 ? info.variableValues : EMPTY_OBJECT, info.fragments != null && Object.keys(info.fragments).length > 0 ? info.fragments : EMPTY_OBJECT, ((_a = info.fieldNodes) === null || _a === void 0 ? void 0 : _a.length) ? info.fieldNodes : EMPTY_ARRAY);
for (const delegationMap of delegationMaps) {
await executeDelegationStage(mergedTypeInfo, delegationMap, object, context, info);
}
return object;
}
exports.mergeFields = mergeFields;
async function executeDelegationStage(mergedTypeInfo, delegationMap, object, context, info) {
const combinedErrors = object[symbols_js_1.UNPATHED_ERRORS_SYMBOL];
const path = (0, graphql_1.responsePathAsArray)(info.path);
const combinedFieldSubschemaMap = object[symbols_js_1.FIELD_SUBSCHEMA_MAP_SYMBOL];
await Promise.all([...delegationMap.entries()].map(async ([subschema, selectionSet]) => {
var _a;
const schema = subschema.transformedSchema || info.schema;
const type = schema.getType(object.__typename);
const resolver = mergedTypeInfo.resolvers.get(subschema);
if (resolver) {
let source;
try {
source = await resolver(object, context, info, subschema, selectionSet, undefined, type);
}
catch (error) {
source = error;
}
if (source instanceof Error || source == null) {
const { fields } = (0, utils_1.collectFields)(schema, EMPTY_OBJECT, EMPTY_OBJECT, type, selectionSet);
const nullResult = {};
for (const [responseKey, fieldNodes] of fields) {
const combinedPath = [...path, responseKey];
if (source instanceof graphql_1.GraphQLError) {
nullResult[responseKey] = (0, utils_1.relocatedError)(source, combinedPath);
}
else if (source instanceof Error) {
nullResult[responseKey] = (0, graphql_1.locatedError)(source, fieldNodes, combinedPath);
}
else {
nullResult[responseKey] = null;
}
}
source = nullResult;
}
else {
if (source[symbols_js_1.UNPATHED_ERRORS_SYMBOL]) {
combinedErrors.push(...source[symbols_js_1.UNPATHED_ERRORS_SYMBOL]);
}
}
const objectSubschema = source[symbols_js_1.OBJECT_SUBSCHEMA_SYMBOL];
const fieldSubschemaMap = source[symbols_js_1.FIELD_SUBSCHEMA_MAP_SYMBOL];
for (const responseKey in source) {
object[responseKey] = source[responseKey];
combinedFieldSubschemaMap[responseKey] = (_a = fieldSubschemaMap === null || fieldSubschemaMap === void 0 ? void 0 : fieldSubschemaMap[responseKey]) !== null && _a !== void 0 ? _a : objectSubschema;
}
}
}));
}