implement method in NotificationService

src/services/NotificationService.ts

@@ -256,6 +256,22 @@ export class NotificationService {
    * @param deviceId
    */
   public async getAllScheduledNotificationsForDevice(deviceId: string): Promise<ScheduledNotificationData[]> {
-    return [];
+    const scheduledNotifications: ScheduledNotificationData[] = [];
+
+    for (const key of Object.keys(this.deviceIdsToDeliverTo)) {
+      if (this.deviceIdsToDeliverTo[key].has(deviceId)) {
+        const tupleKey = TupleKey.fromExistingStringKey(key);
+        const shuttleId = tupleKey.tuple[0]
+        const stopId = tupleKey.tuple[1];
+
+        scheduledNotifications.push({
+          shuttleId,
+          stopId,
+          deviceId,
+        });
+      }
+    }
+
+    return scheduledNotifications;
   }
 }