Infer a GraphQL API from a Neo4j database.js

require('dotenv').config()
const { ApolloServer } = require('apollo-server');
const neo4j = require('neo4j-driver');
const { inferSchema, makeAugmentedSchema } = require('neo4j-graphql-js');

const {
  BOLT_ADDRESS,
  DB_USERNAME,
  DB_PASSWORD
} = process.env;

(async () => {
  const driver = neo4j.driver(BOLT_ADDRESS, neo4j.auth.basic(DB_USERNAME, DB_PASSWORD));
  const { typeDefs } = await inferSchema(driver);

  const generatedSchema = makeAugmentedSchema({
    typeDefs,
  });
  
  const server = new ApolloServer({
    schema: generatedSchema,
    context: ({ req }) => {
      return {
        driver,
        req
      };
    },
  });
  const port = process.env.PORT || 8080;
  
  server.listen(port).then(({ url }) => {
    console.log(`GraphQL API ready at ${url}`);
  }).catch(err => console.error(err));
})();