add stub methods for subscribe/unsubscribe

src/repositories/InMemoryNotificationRepository.ts

@@ -1,4 +1,10 @@
-import { NotificationLookupArguments, NotificationRepository, ScheduledNotification } from "./NotificationRepository";
+import {
+  Listener,
+  NotificationEvent,
+  NotificationLookupArguments,
+  NotificationRepository,
+  ScheduledNotification
+} from "./NotificationRepository";
 import { TupleKey } from "../types/TupleKey";
 
 type DeviceIdSecondsThresholdAssociation = { [key: string]: number };
@@ -13,6 +19,8 @@ export class InMemoryNotificationRepository implements NotificationRepository {
    */
   private deviceIdsToDeliverTo: { [key: string]: DeviceIdSecondsThresholdAssociation } = {}
 
+  private subscribers: Listener[] = [];
+
   async getAllNotificationsForShuttleAndStopId(shuttleId: string, stopId: string) {
     const tuple = new TupleKey(shuttleId, stopId);
     if (this.deviceIdsToDeliverTo[tuple.toString()] === undefined) {
@@ -76,4 +84,9 @@ export class InMemoryNotificationRepository implements NotificationRepository {
     delete this.deviceIdsToDeliverTo[tupleKey.toString()][deviceId];
   }
 
+  public subscribeToNotificationChanges(listener: Listener): void {
+  }
+
+  public unsubscribeFromNotificationChanges(listener: Listener): void {
+  }
 }

src/repositories/NotificationRepository.ts

@@ -14,6 +14,8 @@ export interface ScheduledNotification extends NotificationLookupArguments {
   secondsThreshold: number;
 }
 
+export type Listener = ((event: NotificationEvent) => any);
+
 export interface NotificationEvent {
   notification: ScheduledNotification,
   event: 'delete' | 'addOrUpdate'
@@ -26,6 +28,6 @@ export interface NotificationRepository {
   addOrUpdateNotification(notification: ScheduledNotification): Promise<void>;
   deleteNotificationIfExists(lookupArguments: NotificationLookupArguments): Promise<void>;
 
-  subscribeToNotificationChanges(listener: (event: NotificationEvent) => any): void;
+  subscribeToNotificationChanges(listener: Listener): void;
-  unsubscribeFromNotificationChanges(listener: (event: NotificationEvent) => any): void;
+  unsubscribeFromNotificationChanges(listener: Listener): void;
 }