async_harmful_v1 created by rmoskal - https://repl.it/@rmoskal/asyncharmfulv1

async_harmful_v1.js

/** 
Takes this incoming array
[ { team: 'blue',
    sales: 900,
    userId: 'a0bc44d0-da95-495d-bcf2-535d0b9d8af3',
    name: 'Sally Smith' },
  { team: 'blue',
    sales: 800,
    userId: 'c509388c-9321-4fab-8062-3fa56b2b0d87',
    name: 'John  Jones' } ]

And tranforms it into the following object:
{ team: 'blue',
  sales: 1700,
  users: 
   [ { sales: 900,
       userId: 'a0bc44d0-da95-495d-bcf2-535d0b9d8af3',
       name: 'Sally Smith' },
     { sales: 800,
       userId: 'c509388c-9321-4fab-8062-3fa56b2b0d87',
       name: 'John  Jones' } ] }
**/

function functionalWay(color) {
fetch(color)
.then(resultsString =>JSON.parse(resultsString))
.then(jsonResults => transformFirst(jsonResults))
.then(transformResults => sendToClient(transformResults))
.then(sendResults => remotelog('log',sendResults))
.catch(err => remotelog('error', err))
}


async function declarativeWay(color) {
  try {  
    let resultsString = await fetch(color)
    let jsonResults=JSON.parse(resultsString);
    let transformResults= transformFirst(jsonResults)
    let sendResults = await sendToClient(transformResults)
    remotelog('log', sendResults)
    }catch (e) {
      remotelog('error', e)
    }
}

functionalWay('blue')
declarativeWay('blue')

//The functions!

function fetch(color) {
  let data = [
  {
    "team": "blue",
    "sales": 900,
    "userId": "a0bc44d0-da95-495d-bcf2-535d0b9d8af3",
    "name": "Sally Smith"
  },
  {
    "team": "blue",
    "sales": 800,
    "userId": "c509388c-9321-4fab-8062-3fa56b2b0d87",
    "name": "John  Jones"
  },

  {
    "team": "red",
    "sales": 200,
    "userId": "c509388c-9321-4fab-8062-3fa56b2b0d66",
    "name": "Joey  Ramone"
  }
]
  return Promise.resolve(JSON.stringify(data.filter(each => each.team == color)))
}

function sendToClient(payload) {
  return Promise.resolve({status:'ok'})
}

function remotelog(level, msg) {
  console[level](msg)
}

function transformFirst(_in){
  let res = Object.assign({}, _in[0])
  res.users = _in.map(each => {return {sales:each.sales,
    userId:each.userId,
    name: each.name
    
  }} )
  delete res.userId
  delete res.name 
  res.sales =  res.users.reduce((accum, each) =>  accum + each.sales, 0)
  return res
}