Strict boolean check

[e-mobility-charging-stations-simulator.git] / src / charging-station / WorkerBroadcastChannel.ts

diff --git a/src/charging-station/WorkerBroadcastChannel.ts b/src/charging-station/WorkerBroadcastChannel.ts
index d1d430c3a0c39230aef0c00dd5de5660b25e42a0..96fe7c17df01c76471c384f03af3605175372013 100644 (file)
--- a/src/charging-station/WorkerBroadcastChannel.ts
+++ b/src/charging-station/WorkerBroadcastChannel.ts
@@ -1,13 +1,58 @@
 import { BroadcastChannel } from 'worker_threads';
 
-import { BroadcastChannelRequest } from '../types/WorkerBroadcastChannel';
+import * as uuid from 'uuid';
 
-export default class WorkerBroadcastChannel extends BroadcastChannel {
-  constructor() {
+import type { JsonType } from '../types/JsonType';
+import type {
+  BroadcastChannelRequest,
+  BroadcastChannelResponse,
+  MessageEvent,
+} from '../types/WorkerBroadcastChannel';
+import logger from '../utils/Logger';
+import Utils from '../utils/Utils';
+
+const moduleName = 'WorkerBroadcastChannel';
+
+export default abstract class WorkerBroadcastChannel extends BroadcastChannel {
+  protected constructor() {
     super('worker');
   }
 
   public sendRequest(request: BroadcastChannelRequest): void {
     this.postMessage(request);
   }
+
+  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 | 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 (uuid.validate(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}:`);
+  }
 }