From 63ed267ded13e3742098186761d799a6a9736c9b Mon Sep 17 00:00:00 2001
From: Brendan Chen <me@bchen.dev>
Date: Mon, 10 Nov 2025 14:54:48 -0800
Subject: [PATCH] Add necessary call to updateShuttleLastTimeArrival

---
 .../shuttle/RedisShuttleRepository.ts            | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/src/repositories/shuttle/RedisShuttleRepository.ts b/src/repositories/shuttle/RedisShuttleRepository.ts
index d6e03d6..5eae7cc 100644
--- a/src/repositories/shuttle/RedisShuttleRepository.ts
+++ b/src/repositories/shuttle/RedisShuttleRepository.ts
@@ -418,7 +418,7 @@ export class RedisShuttleRepository extends EventEmitter implements ShuttleGette
     const arrivedStop = await this.getArrivedStopIfExists(shuttle);
 
     if (arrivedStop != undefined) {
-      const lastStopTimestamp = await this.getShuttleLastStopTimestamp(shuttle)
+      const lastStopTimestamp = await this.getShuttleLastStopArrival(shuttle)
       if (lastStopTimestamp != undefined) {
         const now = Date();
         const routeId = shuttle.routeId
@@ -430,7 +430,10 @@ export class RedisShuttleRepository extends EventEmitter implements ShuttleGette
         // Value: seconds it took to get from lastStopTimestamp.stopId to arrivedStop.id
       }
 
-      // TODO: Update the "last stop timestamp"
+      await this.updateShuttleLastStopArrival(shuttle, {
+        stopId: arrivedStop.id,
+        timestamp: new Date(),
+      })
     }
   }
 
@@ -446,10 +449,15 @@ export class RedisShuttleRepository extends EventEmitter implements ShuttleGette
     }
   }
 
-  public async getShuttleLastStopTimestamp(shuttle: IShuttle): Promise<ShuttleStopArrival> {
-    throw new Error("Method not implemented.");
+  public async getShuttleLastStopArrival(shuttle: IShuttle): Promise<ShuttleStopArrival | undefined> {
+    // Get the *time* of the most recent time series entry for the key 
+    throw Error("not implemented");
   }
 
+  private async updateShuttleLastStopArrival(shuttle: IShuttle, lastStopArrival: ShuttleStopArrival) {
+    // Key: shuttleId:stopId:
+    // Value: just a marker (no numerical value)
+  }
 
    public async addOrUpdateStop(stop: IStop): Promise<void> {
     const key = this.createStopKey(stop.id);