-import { BroadcastChannel } from 'worker_threads';
+import { BroadcastChannel } from 'node:worker_threads';
-import { BroadcastChannelRequest, BroadcastChannelResponse } from '../types/WorkerBroadcastChannel';
+import type {
+ BroadcastChannelRequest,
+ BroadcastChannelResponse,
+ JsonType,
+ MessageEvent,
+} from '../types';
+import { Utils, logger } from '../utils';
-export default class WorkerBroadcastChannel extends BroadcastChannel {
- constructor() {
+const moduleName = 'WorkerBroadcastChannel';
+
+export 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) === true && message.length === 3;
+ }
+
+ protected isResponse(message: JsonType[]): boolean {
+ return Array.isArray(message) === true && message.length === 2;
+ }
+
+ protected validateMessageEvent(messageEvent: MessageEvent): MessageEvent | false {
+ if (Array.isArray(messageEvent.data) === false) {
+ logger.error(
+ `${this.logPrefix(
+ moduleName,
+ 'validateMessageEvent'
+ )} Worker broadcast channel protocol message event data is not an array`
+ );
+ return false;
+ }
+ if (Utils.validateUUID(messageEvent.data[0]) === false) {
+ logger.error(
+ `${this.logPrefix(
+ moduleName,
+ 'validateMessageEvent'
+ )} Worker broadcast channel protocol message event data UUID field is invalid`
+ );
+ return false;
+ }
+ return messageEvent;
+ }
+
+ private logPrefix = (modName: string, methodName: string): string => {
+ return Utils.logPrefix(` Worker Broadcast Channel | ${modName}.${methodName}:`);
+ };
}