Refactored 'workerScripts' array and killWorkerScript() fn to be their own modules in TypeScript

src/utils/EventEmitter.ts

@@ -0,0 +1,50 @@
+/**
+ * Generic Event Emitter class following a subscribe/publish paradigm.
+ */
+import { IMap } from "../types";
+
+type cbFn = (...args: any[]) => any;
+
+export interface ISubscriber {
+    /**
+     * Callback function that will be run when an event is emitted
+     */
+    cb: cbFn;
+
+    /**
+     * Name/identifier for this subscriber
+     */
+    id: string;
+}
+
+export class EventEmitter {
+    /**
+     * Map of Subscriber name -> Callback function
+     */
+    subscribers: IMap<cbFn> = {};
+
+    constructor(subs?: ISubscriber[]) {
+        if (Array.isArray(subs)) {
+            for (const s of subs) {
+                this.addSubscriber(s);
+            }
+        }
+    }
+
+    addSubscriber(s: ISubscriber) {
+        this.subscribers[s.id] = s.cb;
+    }
+
+    emitEvent(...args: any[]): void {
+        for (const s in this.subscribers) {
+            const cb = this.subscribers[s];
+
+            cb(args);
+        }
+    }
+
+    removeSubscriber(id: string) {
+        delete this.subscribers[id];
+    }
+
+}