api.js

import Amazon from 'amazon-product-api'
import config from 'config'

const AmazonClient = Amazon.createClient({
  awsId: config.get('Amazon.AWS_ID'),
  awsSecret: config.get('Amazon.AWS_KEY'),
  awsTag: config.get('Amazon.AWS_TAG')
})

export const schema = [`
  type AmazonBook {
    ISBN: String
    Title: String
    Author: [String]
    Pages: Int
    Publisher: String
    PublicationDate: String
    Image: String
    Result: String
  }

  type RootQuery {
    findByISBN(ISBN: String!): AmazonBook
  }

  schema {
    query: RootQuery
  }
`]

export const resolvers = {
  RootQuery: {
    findByISBN: (root, args, context) => {
      let ISBN = args.ISBN
      AmazonClient.itemLookup({
        idType: "ISBN",
        itemId: ISBN,
        responseGroup: "ItemAttributes,Images"
      }).then((result) => {
        let attribs = result[0].ItemAttributes[0]
        return {
          ISBN: attribs.ISBN[0]
        }
      })
    }
  }
}