refactor fetchAndUpdateStopAndPolylineDataForRoutesWithSystemId into separate method

src/loaders/ApiBasedRepositoryLoader.ts

@@ -103,12 +103,17 @@ export class ApiBasedRepositoryLoader {
     // Pass JSON output into two different methods to update repository
     const systems = await this.repository.getSystems();
     await Promise.all(systems.map(async (system: ISystem) => {
+      await this.fetchAndUpdateStopAndPolylineDataForRoutesWithSystemId(system.id);
+    }));
+  }
+
+  public async fetchAndUpdateStopAndPolylineDataForRoutesWithSystemId(systemId: string) {
     const params = {
       getStops: "2",
     };
 
     const formDataJsonObject = {
-        "s0": system.id,
+      "s0": systemId,
       "sA": 1
     };
     const formData = new FormData();
@@ -121,10 +126,9 @@ export class ApiBasedRepositoryLoader {
     });
     const json = await response.json();
 
-      await this.updateStopDataForSystemAndApiResponse(system, json);
+    await this.updateStopDataForSystemAndApiResponse(systemId, json);
     await this.updateOrderedStopDataForExistingStops(json);
     await this.updatePolylineDataForExistingRoutesAndApiResponse(json);
-    }));
   }
 
   public async fetchAndUpdateShuttleDataForExistingSystems() {
@@ -208,7 +212,7 @@ export class ApiBasedRepositoryLoader {
     }))
   }
 
-  protected async updateStopDataForSystemAndApiResponse(system: ISystem, json: any) {
+  protected async updateStopDataForSystemAndApiResponse(systemId: string, json: any) {
     if (json.stops) {
       const jsonStops = Object.values(json.stops);
 
@@ -216,7 +220,7 @@ export class ApiBasedRepositoryLoader {
         const constructedStop: IStop = {
           name: stop.name,
           id: stop.id,
-          systemId: system.id,
+          systemId,
           coordinates: {
             latitude: parseFloat(stop.latitude),
             longitude: parseFloat(stop.longitude),