Simple GraphQL Server using Apollo Server for sentiment analysis that fits in a single

index.js

const { ApolloServer, gql } = require("apollo-server");
var Sentiment = require("sentiment");
var sentiment = new Sentiment();

const typeDefs = gql`
  type SentimentAnalysis {
    score: Int
    comparative: Float
    tokens: [String]
    words: [String]
    positive: [String]
    negative: [String]
  }

  type Query {
    sentiment(phrase: String!): SentimentAnalysis
  }
`;

const resolvers = {
  Query: {
    sentiment: (parent, args) => sentiment.analyze(args.phrase)
  }
};

const server = new ApolloServer({ typeDefs, resolvers });

server.listen().then(({ url }) => {
  console.log(`🚀  Server ready at ${url}`);
});