Replace apiclient event bus with local version

src/utils/events.ts

@@ -0,0 +1,50 @@
+/* eslint-disable @typescript-eslint/no-explicit-any */
+interface Event {
+    type: string;
+}
+
+type callback = (e: Event, ...args: any[]) => void;
+
+function getCallbacks(obj: any, type: string): callback[] {
+    if (!obj) {
+        throw new Error('obj cannot be null!');
+    }
+
+    obj._callbacks = obj._callbacks || {};
+
+    let callbacks = obj._callbacks[type];
+
+    if (!callbacks) {
+        obj._callbacks[type] = [];
+        callbacks = obj._callbacks[type];
+    }
+
+    return callbacks;
+}
+
+export default {
+    on(obj: any, type: string, fn: callback): void {
+        const callbacks = getCallbacks(obj, type);
+
+        callbacks.push(fn);
+    },
+
+    off(obj: any, type: string, fn: callback): void {
+        const callbacks = getCallbacks(obj, type);
+
+        const i = callbacks.indexOf(fn);
+        if (i !== -1) {
+            callbacks.splice(i, 1);
+        }
+    },
+
+    trigger(obj: any, type: string, args: any[] = []) {
+        const eventArgs: [Event, ...any] = [{ type }, ...args];
+
+        getCallbacks(obj, type).slice(0)
+            .forEach(callback => {
+                callback.apply(obj, eventArgs);
+            });
+    }
+};
+/* eslint-enable @typescript-eslint/no-explicit-any */