import { BroadcastChannel } from 'worker_threads';
-import { BroadcastChannelRequest, BroadcastChannelResponse } from '../types/WorkerBroadcastChannel';
+import BaseError from '../exception/BaseError';
+import type { JsonType } from '../types/JsonType';
+import type {
+ BroadcastChannelRequest,
+ BroadcastChannelResponse,
+ MessageEvent,
+} from '../types/WorkerBroadcastChannel';
-export default class WorkerBroadcastChannel extends BroadcastChannel {
- constructor() {
+export default abstract class WorkerBroadcastChannel extends BroadcastChannel {
+ protected constructor() {
super('worker');
}
this.postMessage(request);
}
- public sendResponse(response: BroadcastChannelResponse): void {
+ protected sendResponse(response: BroadcastChannelResponse): void {
this.postMessage(response);
}
+
+ protected isRequest(message: JsonType[]): boolean {
+ return Array.isArray(message) && message.length === 3;
+ }
+
+ protected isResponse(message: JsonType[]): boolean {
+ return Array.isArray(message) && message.length === 2;
+ }
+
+ protected validateMessageEvent(messageEvent: MessageEvent): MessageEvent {
+ if (Array.isArray(messageEvent.data) === false) {
+ throw new BaseError('Worker broadcast channel protocol message event data is not an array');
+ }
+ return messageEvent;
+ }
}