GraphQL for the impatient

meetups.js

'use strict'

const meetups = [
  {
    name: 'MedellinJS',
    description: 'JavaScript User Group',
    members: [
      {
        name: 'Maria F.'
      },
      {
        name: 'Juan D.'
      },
      {
        name: 'Stella M.'
      }
    ]
  },
  {
    name: 'MedellinPHP',
    description: 'PHP User Group',
    members: [
      {
        name: 'Yeiner F.'
      },
      {
        name: 'Alexandra M.'
      }
    ]
  }
]

module.exports = meetups

package.json

{
  "name": "graphql-impatient",
  "version": "1.0.0",
  "author": "Julian Duque",
  "license": "MIT",
  "dependencies": {
    "apollo-server": "^2.3.1",
    "graphql": "^14.1.1"
  }
}

server.js

'use strict'

const { ApolloServer, gql } = require('apollo-server')
const meetups = require('./meetups')
const port = +process.env.PORT || 3000

const typeDefs = gql`
  type Query {
    meetups(name: String): [Meetup!]!
  }

  type Mutation {
    addMember(name: String!, member: MemberInput!): Member!
  }

  type Meetup {
    name: String!
    description: String
    members: [Member!]!
    total: Int!
  }

  type Member {
    name: String!
  }

  input MemberInput {
    name: String!
  }
`

const resolvers = {
  Query: {
    meetups (_, args) {
      const name = args.name ? args.name.toLowerCase() : undefined
      const result = name ? meetups.filter(m => m.name.toLowerCase().startsWith(name)) : meetups
      return result
    }
  },
  Mutation: {
    addMember (_, args) {
      const { name, member } = args
      meetups.find(m => m.name === name).members.push(member)
      return member
    }
  },
  Meetup: {
    total (root, args) {
      const name = root.name
      const meetup = meetups.find(m => m.name === name)
      return meetup.members.length || 0
    }
  }
}

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

server.listen(port).then(({ url }) => {
  console.log(`🚀  Apollo Server running on ${url}`)
})