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import { isObject } from './is.js';
export const validateAndMerge = (...sources) => {
for (const source of sources) {
if ((!isObject(source) || Array.isArray(source)) && source !== undefined) {
throw new TypeError('The `options` argument must be an object');
}
}
return deepMerge({}, ...sources);
};
export const mergeHeaders = (source1 = {}, source2 = {}) => {
const result = new globalThis.Headers(source1);
const isHeadersInstance = source2 instanceof globalThis.Headers;
const source = new globalThis.Headers(source2);
for (const [key, value] of source.entries()) {
if ((isHeadersInstance && value === 'undefined') || value === undefined) {
result.delete(key);
}
else {
result.set(key, value);
}
}
return result;
};
function newHookValue(original, incoming, property) {
return (Object.hasOwn(incoming, property) && incoming[property] === undefined)
? []
: deepMerge(original[property] ?? [], incoming[property] ?? []);
}
export const mergeHooks = (original = {}, incoming = {}) => ({
beforeRequest: newHookValue(original, incoming, 'beforeRequest'),
beforeRetry: newHookValue(original, incoming, 'beforeRetry'),
afterResponse: newHookValue(original, incoming, 'afterResponse'),
beforeError: newHookValue(original, incoming, 'beforeError'),
});
// TODO: Make this strongly-typed (no `any`).
export const deepMerge = (...sources) => {
let returnValue = {};
let headers = {};
let hooks = {};
for (const source of sources) {
if (Array.isArray(source)) {
if (!Array.isArray(returnValue)) {
returnValue = [];
}
returnValue = [...returnValue, ...source];
}
else if (isObject(source)) {
for (let [key, value] of Object.entries(source)) {
if (isObject(value) && key in returnValue) {
value = deepMerge(returnValue[key], value);
}
returnValue = { ...returnValue, [key]: value };
}
if (isObject(source.hooks)) {
hooks = mergeHooks(hooks, source.hooks);
returnValue.hooks = hooks;
}
if (isObject(source.headers)) {
headers = mergeHeaders(headers, source.headers);
returnValue.headers = headers;
}
}
}
return returnValue;
};
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