@twurple/auth
Version:
Authenticate with Twitch and stop caring about refreshing tokens.
69 lines (68 loc) • 2.57 kB
JavaScript
import { promiseWithResolvers } from '@d-fischer/shared-utils';
export class TokenFetcher {
constructor(executor) {
this._newTokenScopeSets = [];
this._newTokenPromise = null;
this._queuedScopeSets = [];
this._queueExecutor = null;
this._queuePromise = null;
this._executor = executor;
}
async fetch(...scopeSets) {
var _a;
const filteredScopeSets = scopeSets.filter((val) => Boolean(val));
if (this._newTokenPromise) {
if (!filteredScopeSets.length) {
return await this._newTokenPromise;
}
if (this._queueExecutor) {
this._queuedScopeSets.push(...filteredScopeSets);
}
else {
this._queuedScopeSets = [...filteredScopeSets];
}
if (!this._queuePromise) {
const { promise, resolve, reject } = promiseWithResolvers();
this._queuePromise = promise;
this._queueExecutor = async () => {
var _a;
if (!this._queuePromise) {
return;
}
this._newTokenScopeSets = this._queuedScopeSets;
this._queuedScopeSets = [];
this._newTokenPromise = this._queuePromise;
this._queuePromise = null;
this._queueExecutor = null;
try {
resolve(await this._executor(this._newTokenScopeSets));
}
catch (e) {
reject(e);
}
finally {
this._newTokenPromise = null;
this._newTokenScopeSets = [];
(_a = this._queueExecutor) === null || _a === void 0 ? void 0 : _a.call(this);
}
};
}
return await this._queuePromise;
}
this._newTokenScopeSets = [...filteredScopeSets];
const { promise, resolve, reject } = promiseWithResolvers();
this._newTokenPromise = promise;
try {
resolve(await this._executor(this._newTokenScopeSets));
}
catch (e) {
reject(e);
}
finally {
this._newTokenPromise = null;
this._newTokenScopeSets = [];
(_a = this._queueExecutor) === null || _a === void 0 ? void 0 : _a.call(this);
}
return await promise;
}
}