src/charging-station/WorkerBroadcastChannel.ts

   1 import { BroadcastChannel } from 'worker_threads';
   2
   3 import BaseError from '../exception/BaseError';
   4 import type { JsonType } from '../types/JsonType';
   5 import type {
   6   BroadcastChannelRequest,
   7   BroadcastChannelResponse,
   8   MessageEvent,
   9 } from '../types/WorkerBroadcastChannel';
  10
  11 export default abstract class WorkerBroadcastChannel extends BroadcastChannel {
  12   protected constructor() {
  13     super('worker');
  14   }
  15
  16   public sendRequest(request: BroadcastChannelRequest): void {
  17     this.postMessage(request);
  18   }
  19
  20   protected sendResponse(response: BroadcastChannelResponse): void {
  21     this.postMessage(response);
  22   }
  23
  24   protected isRequest(message: JsonType[]): boolean {
  25     return Array.isArray(message) && message.length === 3;
  26   }
  27
  28   protected isResponse(message: JsonType[]): boolean {
  29     return Array.isArray(message) && message.length === 2;
  30   }
  31
  32   protected validateMessageEvent(messageEvent: MessageEvent): MessageEvent {
  33     if (Array.isArray(messageEvent.data) === false) {
  34       throw new BaseError('Worker broadcast channel protocol message event data is not an array');
  35     }
  36     return messageEvent;
  37   }
  38 }