Nested graphql resolvers with NodeJS

nested-gql-resolvers.js

"use strict";

const express = require('express');
const express_graphql = require('express-graphql');
const { GraphQLSchema, GraphQLObjectType, GraphQLString } = require('graphql');

// GraphQL schema
const songType = new GraphQLObjectType({
  name: 'SongType',
  fields: {
    name: {
      type: GraphQLString,
    }
  }
})

const spotifyType = new GraphQLObjectType({
  name: 'SpotifyType',
  fields: {
    getCurrentSong: {
      type: songType,
      resolve: () => ({
        name: 'Armin van Buuren - Blah Blah Blah'
      }),
    },
  },
});

const githubRecentActivityType = new GraphQLObjectType({
  name: 'GitHubRecentActivityType',
  fields: {
    description: {
      type: GraphQLString,
    },
  }
})

const githubType = new GraphQLObjectType({
  name: 'GitHubType',
  fields: {
    getRecentActivity: {
      type: githubRecentActivityType,
      resolve: () => ({
        description: 'Some activity',
      }),
    }
  },
});

const schema = new GraphQLSchema({
  query: new GraphQLObjectType({
    name: 'RootQueryType',
    fields: {
      spotify: {
        type: spotifyType,
        resolve: () => ({}),
      },
      github: {
        type: githubType,
        resolve: () => ({}),
      },
    },
  }),
});

// Express
const app = express();
app.use('/graphql', express_graphql({
  schema: schema,
}));
app.listen(4000, () => console.log('Express GraphQL Server now running on http://localhost:4000/graphql'));