add orderedStop property for Route

schema.graphqls

@@ -17,7 +17,7 @@ type System {
 type Route {
   name: String!
   id: ID!
-  orderedStops: [OrderedStop!]
+  orderedStop(forStopId: ID): OrderedStop
   shuttles: [Shuttle!]
   polylineCoordinates: [Coordinates!]!
   color: String!

src/resolvers.ts

@@ -110,7 +110,24 @@ export const resolvers: Resolvers<ServerContext> = {
         route: parent,
         id,
       }));
-    }
+    },
+    orderedStop: async (parent, args, contextValue, info) => {
+      if (!args.forStopId) return null;
+      const orderedStop = await contextValue.repository.getOrderedStopByRouteAndStopId(parent.id, args.forStopId);
+      if (!orderedStop) return null;
+
+      const stop = await contextValue.repository.getStopById(orderedStop.stopId);
+      if (!stop) return null;
+
+      return {
+        stop: {
+          id: stop.id,
+          name: stop.name,
+          coordinates: stop.coordinates as Coordinates,
+        },
+        route: parent,
+      }
+    },
   },
   Shuttle: {
     eta: async (parent, args, contextValue, info) => {