Cloud Functions for Firebase - GraphQL Server - /functionsES6/graphql/data/resolvers.js

CF4F-graphql|firebaseFunctions|graphql|data|resolver.js

const authors = [
  { id: 1, firstName: "Tom", lastName: "Coleman" },
  { id: 2, firstName: "Sashko", lastName: "Stubailo" }
]

const posts = [
  { id: 1, authorId: 1, title: "Introduction to GraphQL", votes: 2 },
  { id: 2, authorId: 2, title: "GraphQL Rocks", votes: 3 },
  { id: 3, authorId: 2, title: "Advanced GraphQL", votes: 1 }
]

const resolveFunctions = {
  Query: {
    posts() {
      return posts
    },
    author(_, { id }) {
      return authors.find(author => author.id === id)
    }
  },
  Mutation: {
    upvotePost(_, { postId }) {
      const post = posts.find(post => post.id === postId)
      if (!post) {
        throw new Error(`Couldn't find post with id ${postId}`)
      }
      post.votes += 1
      // pubsub.publish('postUpvoted', post);
      return post
    }
  },
  Author: {
    posts(author) {
      return posts.filter(post => post.authorId === author.id)
    }
  },
  Post: {
    author(post) {
      return authors.find(author => author.id === post.authorId)
    }
  }
}

export default resolveFunctions