From 1d98e8450e3963a9afffe11e2571bd15d2347ab0 Mon Sep 17 00:00:00 2001
From: Brendan Chen <me@bchen.dev>
Date: Thu, 20 Nov 2025 16:26:25 -0800
Subject: [PATCH] Update InterchangeSystemBuilderArguments with new properties
 for controlling event emitter degree delta

---
 src/entities/InterchangeSystem.ts      | 16 +++++++++++++++-
 src/index.ts                           |  2 ++
 testHelpers/apolloTestServerHelpers.ts |  2 ++
 3 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/src/entities/InterchangeSystem.ts b/src/entities/InterchangeSystem.ts
index 985a819..8ed86d3 100644
--- a/src/entities/InterchangeSystem.ts
+++ b/src/entities/InterchangeSystem.ts
@@ -46,7 +46,21 @@ export interface InterchangeSystemBuilderArguments {
    * Controls whether to self-calculate ETAs or use the external
    * shuttle provider for them.
    */
-  useSelfUpdatingEtas: boolean
+  useSelfUpdatingEtas: boolean;
+
+  /**
+   * The size of the threshold to detect when a shuttle has arrived
+   * at a stop, in latitude/longitude degrees.
+   */
+  shuttleStopArrivalDegreeDelta: number;
+
+  /**
+   * The size of the threshold to detect when a shuttle is "near"
+   * a stop, in latitude/longitude degrees. To determine this value,
+   * find the distance at which the shuttle would normally take
+   * ~1 minute to reach the next stop.
+   */
+  shutleStopNearbyDegreeDelta: number;
 }
 
 export class InterchangeSystem {
diff --git a/src/index.ts b/src/index.ts
index a8fd797..03cd30f 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -24,6 +24,8 @@ const supportedSystems: InterchangeSystemBuilderArguments[] = [
     parkingSystemId: ChapmanApiBasedParkingRepositoryLoader.id,
     name: "Chapman University",
     useSelfUpdatingEtas: true,
+    shuttleStopArrivalDegreeDelta: 0.001,
+    shutleStopNearbyDegreeDelta: 0.003,
   }
 ]
 
diff --git a/testHelpers/apolloTestServerHelpers.ts b/testHelpers/apolloTestServerHelpers.ts
index 60a8355..83f3173 100644
--- a/testHelpers/apolloTestServerHelpers.ts
+++ b/testHelpers/apolloTestServerHelpers.ts
@@ -25,6 +25,8 @@ const systemInfoForTesting: InterchangeSystemBuilderArguments = {
   passioSystemId: "263",
   parkingSystemId: ChapmanApiBasedParkingRepositoryLoader.id,
   useSelfUpdatingEtas: false,
+  shuttleStopArrivalDegreeDelta: 0.001,
+  shutleStopNearbyDegreeDelta: 0.003,
 };
 
 export function buildSystemForTesting() {