move other resolvers into their own files

src/resolvers/OrderedStopResolvers.ts

@@ -0,0 +1,52 @@
+import { OrderedStop, Resolvers } from "../generated/graphql";
+import { ServerContext } from "../ServerContext";
+
+export const OrderedStopResolvers: Resolvers<ServerContext> = {
+  OrderedStop: {
+    nextStop: async (parent, args, contextValue, info): Promise<OrderedStop | null> => {
+      const routeId = parent.routeId;
+      const stopId = parent.stopId;
+
+      const currentOrderedStop = await contextValue.repository.getOrderedStopByRouteAndStopId(routeId, stopId);
+      if (!currentOrderedStop) return null;
+
+      const nextOrderedStop = currentOrderedStop.nextStop;
+      if (!nextOrderedStop) return null;
+
+      const nextOrderedStopObject = await contextValue.repository.getStopById(nextOrderedStop.stopId);
+      if (!nextOrderedStopObject) return null;
+
+      return {
+        route: parent.route,
+        routeId: parent.routeId,
+        stopId: nextOrderedStopObject.id,
+      }
+    },
+    previousStop: async (parent, args, contextValue, info): Promise<OrderedStop | null> => {
+      const routeId = parent.routeId;
+      const stopId = parent.stopId;
+
+      const currentOrderedStop = await contextValue.repository.getOrderedStopByRouteAndStopId(routeId, stopId);
+      if (!currentOrderedStop) return null;
+
+      const previousOrderedStop = currentOrderedStop.previousStop;
+      if (!previousOrderedStop) return null;
+
+      const previousOrderedStopObject = await contextValue.repository.getStopById(previousOrderedStop.stopId);
+      if (!previousOrderedStopObject) return null;
+
+      return {
+        route: parent.route,
+        routeId: parent.routeId,
+        stopId: previousOrderedStopObject.id,
+      }
+    },
+    stop: async (parent, args, contextValue, info) => {
+      return await contextValue.repository.getStopById(parent.stopId);
+    },
+    route: async (parent, args, contextValue, info) => {
+      return await contextValue.repository.getRouteById(parent.routeId);
+    },
+  },
+
+}