@aeolun/graphql-redis-subscriptions

<!doctype html> <html lang="en"> <head> <title>Code coverage report for pubsub-async-iterator.ts</title> <meta charset="utf-8" /> <link rel="stylesheet" href="prettify.css" /> <link rel="stylesheet" href="base.css" /> <link rel="shortcut icon" type="image/x-icon" href="favicon.png" /> <meta name="viewport" content="width=device-width, initial-scale=1" /> <style type='text/css'> .coverage-summary .sorter { background-image: url(sort-arrow-sprite.png); } </style> </head> <body> <div class='wrapper'> <div class='pad1'> <h1><a href="index.html">All files</a> pubsub-async-iterator.ts</h1> <div class='clearfix'> <div class='fl pad1y space-right2'> 92.45% Statements 49/53 </div> <div class='fl pad1y space-right2'> 83.33% Branches 15/18 </div> <div class='fl pad1y space-right2'> 85.71% Functions 12/14 </div> <div class='fl pad1y space-right2'> 90.91% Lines 40/44 </div> </div> Press n or j to go to the next uncovered block, b, p or k for the previous block. </div> <div class='status-line 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4x 2x       1x  </td><td class="text"><pre class="prettyprint lang-js">import { PubSubEngine } from 'graphql-subscriptions';   /** * A class for digesting PubSubEngine events via the new AsyncIterator interface. * This implementation is a generic version of the one located at * https://github.com/apollographql/graphql-subscriptions/blob/master/src/event-emitter-to-async-iterator.ts * @class * * @constructor * * @property pullQueue @type {Function[]} * A queue of resolve functions waiting for an incoming event which has not yet arrived. * This queue expands as next() calls are made without PubSubEngine events occurring in between. * * @property pushQueue @type {any[]} * A queue of PubSubEngine events waiting for next() calls to be made. * This queue expands as PubSubEngine events arrice without next() calls occurring in between. * * @property eventsArray @type {string[]} * An array of PubSubEngine event names which this PubSubAsyncIterator should watch. * * @property allSubscribed @type {Promise<number[]>} * A promise of a list of all subscription ids to the passed PubSubEngine. * * @property listening @type {boolean} * Whether or not the PubSubAsynIterator is in listening mode (responding to incoming PubSubEngine events and next() calls). * Listening begins as true and turns to false once the return method is called. * * @property pubsub @type {PubSubEngine} * The PubSubEngine whose events will be observed. */ export class PubSubAsyncIterator<T> implements AsyncIterableIterator<T> {   constructor(pubsub: PubSubEngine, eventNames: string | string[], options?: unknown) { this.pubsub = pubsub; this.options = options; this.pullQueue = []; this.pushQueue = []; this.listening = true; this.eventsArray = typeof eventNames === 'string' ? [eventNames] : eventNames; }   public async next() { await this.subscribeAll(); return this.listening ? this.pullValue() : this.return(); }   public async return(): Promise<{ value: unknown, done: true }> { await this.emptyQueue(); return { value: undefined, done: true }; }   public async throw(error): Promise<never> { await this.emptyQueue(); return Promise.reject(error); }   public [Symbol.asyncIterator]() { return this; }   private pullQueue: Array<(data: { value: unknown, done: boolean }) => void>; private pushQueue: any[]; private eventsArray: string[]; private subscriptionIds: Promise<number[]> | undefined; private listening: boolean; private pubsub: PubSubEngine; private options: unknown;   private async pushValue(event) { await this.subscribeAll(); if (this.pullQueue.length !== 0) { this.pullQueue.shift()({ value: event, done: false }); } else { this.pushQueue.push(event); } }   private pullValue(): Promise<IteratorResult<any>> { return new Promise(resolve => { Iif (this.pushQueue.length !== 0) { resolve({ value: this.pushQueue.shift(), done: false }); } else { this.pullQueue.push(resolve); } }); }   private async emptyQueue() { if (this.listening) { this.listening = false; if (Ithis.subscriptionIds) this.unsubscribeAll(await this.subscriptionIds); this.pullQueue.forEach(resolve => resolve({ value: undefined, done: true })); this.pullQueue.length = 0; this.pushQueue.length = 0; } }   private subscribeAll() { if (!this.subscriptionIds) { this.subscriptionIds = Promise.all(this.eventsArray.map( eventName => this.pubsub.subscribe(eventName, this.pushValue.bind(this), this.options), )); } return this.subscriptionIds; }   private unsubscribeAll(subscriptionIds: number[]) { for (const subscriptionId of subscriptionIds) { this.pubsub.unsubscribe(subscriptionId); } }   }  </pre></td></tr></table></pre> <div class='push'></div> </div> <div class='footer quiet pad2 space-top1 center small'> Code coverage generated by <a href="https://istanbul.js.org/" target="_blank">istanbul</a> at Mon Aug 14 2023 10:11:54 GMT+0900 (Japan Standard Time) </div> </div> <script src="prettify.js"></script> <script> window.onload = function () { prettyPrint(); }; </script> <script src="sorter.js"></script> <script src="block-navigation.js"></script> </body> </html>