project-inter-server/src/resolvers/RouteResolvers.ts

import { Coordinates, Resolvers } from "../generated/graphql";
import { ServerContext } from "../ServerContext";

export const RouteResolvers: Resolvers<ServerContext> = {
  Route: {
    shuttles: async (parent, args, contextValue, info) => {
      const shuttles = await contextValue.shuttleRepository.getShuttlesByRouteId(parent.id);

      return shuttles.map(({
        coordinates,
        name,
        id,
        orientationInDegrees
      }) => ({
        coordinates: coordinates as Coordinates,
        name,
        route: parent,
        routeId: parent.id,
        id,
        orientationInDegrees
      }));
    },
    orderedStop: async (parent, args, contextValue, info) => {
      if (!args.forStopId) return null;
      const orderedStop = await contextValue.shuttleRepository.getOrderedStopByRouteAndStopId(parent.id, args.forStopId);
      if (!orderedStop) return null;

      const stop = await contextValue.shuttleRepository.getStopById(orderedStop.stopId);
      if (!stop) return null;

      return {
        stopId: args.forStopId,
        routeId: parent.id,
        route: parent,
      }
    },
  },
}