library-backend.js

const { ApolloServer } = require('@apollo/server')
const { startStandaloneServer } = require('@apollo/server/standalone')

let authors = [
  {
    name: 'Robert Martin',
    id: "afa51ab0-344d-11e9-a414-719c6709cf3e",
    born: 1952,
  },
  {
    name: 'Martin Fowler',
    id: "afa5b6f0-344d-11e9-a414-719c6709cf3e",
    born: 1963
  },
  {
    name: 'Fyodor Dostoevsky',
    id: "afa5b6f1-344d-11e9-a414-719c6709cf3e",
    born: 1821
  },
  { 
    name: 'Joshua Kerievsky', // birthyear not known
    id: "afa5b6f2-344d-11e9-a414-719c6709cf3e",
  },
  { 
    name: 'Sandi Metz', // birthyear not known
    id: "afa5b6f3-344d-11e9-a414-719c6709cf3e",
  },
]

/*
 * Suomi:
 * Saattaisi olla järkevämpää assosioida kirja ja sen tekijä tallettamalla kirjan yhteyteen tekijän nimen sijaan tekijän id
 * Yksinkertaisuuden vuoksi tallennamme kuitenkin kirjan yhteyteen tekijän nimen
 *
 * English:
 * It might make more sense to associate a book with its author by storing the author's id in the context of the book instead of the author's name
 * However, for simplicity, we will store the author's name in connection with the book
 *
 * Spanish:
 * Podría tener más sentido asociar un libro con su autor almacenando la id del autor en el contexto del libro en lugar del nombre del autor
 * Sin embargo, por simplicidad, almacenaremos el nombre del autor en conexión con el libro
*/

let books = [
  {
    title: 'Clean Code',
    published: 2008,
    author: 'Robert Martin',
    id: "afa5b6f4-344d-11e9-a414-719c6709cf3e",
    genres: ['refactoring']
  },
  {
    title: 'Agile software development',
    published: 2002,
    author: 'Robert Martin',
    id: "afa5b6f5-344d-11e9-a414-719c6709cf3e",
    genres: ['agile', 'patterns', 'design']
  },
  {
    title: 'Refactoring, edition 2',
    published: 2018,
    author: 'Martin Fowler',
    id: "afa5de00-344d-11e9-a414-719c6709cf3e",
    genres: ['refactoring']
  },
  {
    title: 'Refactoring to patterns',
    published: 2008,
    author: 'Joshua Kerievsky',
    id: "afa5de01-344d-11e9-a414-719c6709cf3e",
    genres: ['refactoring', 'patterns']
  },  
  {
    title: 'Practical Object-Oriented Design, An Agile Primer Using Ruby',
    published: 2012,
    author: 'Sandi Metz',
    id: "afa5de02-344d-11e9-a414-719c6709cf3e",
    genres: ['refactoring', 'design']
  },
  {
    title: 'Crime and punishment',
    published: 1866,
    author: 'Fyodor Dostoevsky',
    id: "afa5de03-344d-11e9-a414-719c6709cf3e",
    genres: ['classic', 'crime']
  },
  {
    title: 'Demons',
    published: 1872,
    author: 'Fyodor Dostoevsky',
    id: "afa5de04-344d-11e9-a414-719c6709cf3e",
    genres: ['classic', 'revolution']
  },
]

/*
  you can remove the placeholder query once your first one has been implemented 
*/

const typeDefs = `
  type Query {
    dummy: Int
  }
`

const resolvers = {
  Query: {
    dummy: () => 0
  }
}

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

startStandaloneServer(server, {
  listen: { port: 4000 },
}).then(({ url }) => {
  console.log(`Server ready at ${url}`)
})