GraphQL & Cloud Functions for Firebase example

graphql-functions.js

import {https} from 'firebase-functions';
import gqlServer from './graphql/server';

const server = gqlServer();

// Graphql api
// https://us-central1-<project-name>.cloudfunctions.net/api/
const api = https.onRequest(server);

export {api};

graphql-server.js

import express from 'express';
import {ApolloServer} from 'apollo-server-express';

import schema from './schema';
import resolvers from './resolvers';

function gqlServer() {
  const app = express();

  const apolloServer = new ApolloServer({
    typeDefs: schema,
    resolvers,
    // Enable graphiql gui
    introspection: true,
    playground: true
  });

  apolloServer.applyMiddleware({app, path: '/', cors: true});

  return app;
}

export default gqlServer;

resolvers.js

const resolverFunctions = {
  Query: {
    hello: () => 'world'
  }
};

export default resolverFunctions;

schema.js

const {gql} = require('apollo-server-express');

const schema = gql`
  type Query {
    "A simple type for getting started!"
    hello: String
  }
`;

export default schema;