@graphql-tools/utils
Version:
Common package containing utils and types for GraphQL tools
51 lines (50 loc) • 2.01 kB
JavaScript
import { mergeDeep } from './mergeDeep.js';
export function mergeIncrementalResult({ incrementalResult, executionResult, }) {
const path = ['data', ...(incrementalResult.path ?? [])];
if (incrementalResult.items) {
for (const item of incrementalResult.items) {
setObjectKeyPath(executionResult, path, item);
// Increment the last path segment (the array index) to merge the next item at the next index
path[path.length - 1]++;
}
}
if (incrementalResult.data) {
setObjectKeyPath(executionResult, path, incrementalResult.data);
}
if (incrementalResult.errors) {
executionResult.errors = executionResult.errors || [];
executionResult.errors.push(...incrementalResult.errors);
}
if (incrementalResult.extensions) {
setObjectKeyPath(executionResult, ['extensions'], incrementalResult.extensions);
}
if (incrementalResult.incremental) {
incrementalResult.incremental.forEach(incrementalSubResult => {
mergeIncrementalResult({
incrementalResult: incrementalSubResult,
executionResult,
});
});
}
}
function setObjectKeyPath(obj, keyPath, value) {
let current = obj;
let i;
for (i = 0; i < keyPath.length - 1; i++) {
const key = keyPath[i];
if (key === '__proto__' || key === 'constructor' || key === 'prototype') {
return;
}
if (current[key] == null) {
// Determine if the next key is a number to create an array, otherwise create an object
current[key] = typeof keyPath[i + 1] === 'number' ? [] : {};
}
current = current[key];
}
const finalKey = keyPath[i];
if (finalKey === '__proto__' || finalKey === 'constructor' || finalKey === 'prototype') {
return;
}
const existingValue = current[finalKey];
current[finalKey] = existingValue != null ? mergeDeep([existingValue, value]) : value;
}