From bc07fe5622999a66c5bde97fd35938eae42b904f Mon Sep 17 00:00:00 2001
From: Brendan Chen <me@bchen.dev>
Date: Wed, 22 Jan 2025 20:05:47 -0800
Subject: [PATCH] add implementation for removeSystemIfExists

---
 .../UnoptimizedInMemoryRepository.ts          | 31 ++++++++++++-------
 1 file changed, 19 insertions(+), 12 deletions(-)

diff --git a/src/repositories/UnoptimizedInMemoryRepository.ts b/src/repositories/UnoptimizedInMemoryRepository.ts
index 18845ea..6aba616 100644
--- a/src/repositories/UnoptimizedInMemoryRepository.ts
+++ b/src/repositories/UnoptimizedInMemoryRepository.ts
@@ -148,28 +148,35 @@ export class UnoptimizedInMemoryRepository implements GetterSetterRepository {
     }
   }
 
-  removeSystemIfExists(systemId: string): Promise<ISystem | null> {
-    return Promise.resolve(null);
+  public async removeSystemIfExists(systemId: string): Promise<ISystem | null> {
+    const index = this.systems.findIndex((s) => s.id === systemId);
+    if (index > -1) {
+      const systemToReturn = this.systems[index];
+      this.systems.splice(index, 1);
+      return systemToReturn;
+    }
+
+    return null;
   }
 
-  removeRouteIfExists(routeId: string): Promise<IRoute | null> {
-    return Promise.resolve(null);
+  public async removeRouteIfExists(routeId: string): Promise<IRoute | null> {
+    return null;
   }
 
-  removeShuttleIfExists(shuttleId: string): Promise<IShuttle | null> {
-    return Promise.resolve(null);
+  public async removeShuttleIfExists(shuttleId: string): Promise<IShuttle | null> {
+    return null;
   }
 
-  removeStopIfExists(stopId: string): Promise<IStop | null> {
-    return Promise.resolve(null);
+  public async removeStopIfExists(stopId: string): Promise<IStop | null> {
+    return null;
   }
 
-  removeOrderedStopIfExists(stopId: string, routeId: string): Promise<IOrderedStop | null> {
-    return Promise.resolve(null);
+  public async removeOrderedStopIfExists(stopId: string, routeId: string): Promise<IOrderedStop | null> {
+    return null;
   }
 
-  removeEtaIfExists(shuttleId: string, stopId: string): Promise<IEta | null> {
-    return Promise.resolve(null);
+  public async removeEtaIfExists(shuttleId: string, stopId: string): Promise<IEta | null> {
+    return null;
   }
 
   public async clearSystemData() {