PairProgramming

Exercise1.js

const arr = [
  {
    username: "David",
    status: "online",
    lastActivity: 10
  },
  {
    username: "Lucy",
    status: "offline",
    lastActivity: 22
  },
  {
    username: "Bob",
    status: "online",
    lastActivity: 104
  }
];

const whosOnline = function(arr) {
  arr2 = arr.map(function(item) {
    let newStatus;
    if (item.status === "offline") {
      newStatus = "offline";
    } else if (item.status === "online" && item.lastActivity > 10) {
      newStatus = "away";
    } else {
      newStatus = "online";
    }
    return { username: item.username, status: newStatus };
  });
  const online = [];
  const offline = [];
  const away = [];
  const findResult = {};

  arr2.forEach(element => {
    if (element.status === "online") {
      online.push(element.username);
    } else if (element.status === "offline") {
      offline.push(element.username);
    } else if (element.status === "away") {
      away.push(element.username);
    }
  });
  if (online.length > 0) {
    findResult["online"] = online;
  }
  if (offline.length > 0) {
    findResult["offline"] = offline;
  }
  if (away.length > 0) {
    findResult["away"] = away;
  }
  return findResult;
};
whosOnline(arr);

console.log(whosOnline(arr));