make timeoutMs a settable property

src/loaders/TimedApiBasedRepositoryLoader.ts

@@ -1,27 +1,16 @@
 import { RepositoryLoader } from "./RepositoryLoader";
 
-// Ideas to break this into smaller pieces in the future:
-// Have one repository data loader running for each supported system
-// Each data loader independently updates data based on frequency of usage
-
-// Notes on this: we only need to reload ETA data frequently
-// Other data can be reloaded periodically
-// Detailed list:
-// - ETA: reload frequently or switch to write-through approach
-// - Shuttles: reload every minute
-// - Routes: reload every few minutes
-// - Stops: reload every few minutes
-// - OrderedStops: reload every few minutes
-// - Systems: reload once a day
+// To break down timed loading in the future:
+// Add flags to the repository indicating which data users are subscribed to
+// In the loader's `fetchAll` method, check flags and update only needed data
 
 export class TimedApiBasedRepositoryLoader {
   private shouldBeRunning: boolean = false;
   private timer: any;
 
-  readonly timeout = 10000;
-
   constructor(
     public loader: RepositoryLoader,
+    public timeoutMs: number = 10000,
   ) {
     this.startFetchDataAndUpdate = this.startFetchDataAndUpdate.bind(this);
   }
@@ -49,6 +38,6 @@ export class TimedApiBasedRepositoryLoader {
       console.error(e);
     }
 
-    this.timer = setTimeout(this.startFetchDataAndUpdate, this.timeout);
+    this.timer = setTimeout(this.startFetchDataAndUpdate, this.timeoutMs);
   }
 }