Make checkIfShuttleIsAtStop part of the ShuttleGetterRepository interface

src/repositories/shuttle/RedisShuttleRepository.ts

@@ -447,7 +447,7 @@ export class RedisShuttleRepository extends BaseRedisRepository implements Shutt
     await this.redisClient.sRem(this.shuttleIsAtStopKey, shuttleId);
   }
 
-  private async checkIfShuttleIsAtStop(shuttleId: string) {
+  public async checkIfShuttleIsAtStop(shuttleId: string) {
     return await this.redisClient.sIsMember(this.shuttleIsAtStopKey, shuttleId);
   }
 

src/repositories/shuttle/ShuttleGetterRepository.ts

@@ -95,6 +95,14 @@ export interface ShuttleGetterRepository extends EventEmitter {
    */
   getShuttleLastStopArrival(shuttleId: string): Promise<ShuttleStopArrival | undefined>;
 
+  /**
+   * Determine if the shuttle is currently at a stop.
+   * If `true`, then calling `getShuttleLastStopArrival` will get
+   * the stop the shuttle is currently at.
+   * @param shuttleId
+   */
+  checkIfShuttleIsAtStop(shuttleId: string): Promise<boolean>;
+
   /**
    * Check if a shuttle has arrived at a stop within the given delta.
    * Returns the stop if the shuttle is at a stop, otherwise undefined.

src/repositories/shuttle/UnoptimizedInMemoryShuttleRepository.ts

@@ -223,7 +223,7 @@ export class UnoptimizedInMemoryShuttleRepository
     this.shuttlesAtStop.delete(shuttleId);
   }
 
-  private async checkIfShuttleIsAtStop(shuttleId: string) {
+  public async checkIfShuttleIsAtStop(shuttleId: string) {
     return this.shuttlesAtStop.has(shuttleId);
   }