Asana Tasks to ICal Feed

asana-ical.js

const axios = require("axios");
const ics = require('ics');
const fs = require('fs');

const asanaClient = axios.create({
  baseURL: 'https://app.asana.com/api/1.0/',
  headers: { "Authorization": "Bearer <Get personal ACCESS_TOKEN from Asana>" }
});

async function getMe() {
  let res = await asanaClient.get("/users/me");
  return res.data["data"];
}
async function getWorkspaces() {
  let res = await asanaClient.get("/workspaces");
  return res.data["data"];
}

async function getTasks({workspace, assignee}) {
  let res = await asanaClient.get(`/tasks?workspace=${workspace}&assignee=${assignee}&completed_since=now&opt_fields=projects,name,assignee,html_notes,notes,due_on,due_at,created_at,modified_at,completed_at`);
  return res.data["data"];
}

function getDateArray(date) {
  const dt = new Date(date);
  return [dt.getUTCFullYear(), dt.getUTCMonth() + 1, dt.getUTCDate(), dt.getUTCHours(), dt.getUTCMinutes()];
}

async function asanaToIcal() {
  // can hardcode values after getting them from API
  let assignee = (await getMe()).gid
  // getWorkspaces returns an array of workspaces, so you may need to reference a different workspace gid if you're looking for tasks in another workspace
  let workspace = (await getWorkspaces())[0].gid

  let tasks = await getTasks({assignee, workspace});
  let events = tasks.filter(task => task.due_on).map(task => {
    // use " ^^" as a delimiter for task duration (in minutes)
    let [title, minutes] = task.name.split(" ^^");
    if (!minutes) {
      // put default number of minutes
      minutes = 30;
    }
    return {
      uid: task.gid,
      title,
      description: task.notes,
      status: 'CONFIRMED',
      busyStatus: 'BUSY',
      start: getDateArray(task.due_at || task.due_on),
      startInputType: "utc",
      created: getDateArray(task.created_at),
      lastModified: getDateArray(task.modified_at),
      duration: { minutes: parseInt(minutes) }
    };
  });
  const { error, value: ics_feed } = ics.createEvents(events);
  if (error) {
    console.log(error);
    return;
  }
  // ics_feed can either be 
  // 1. written to a file to upload separately, eg:
  // fs.writeFileSync(`${__dirname}/event.ics`, ics_feed);
  // 2. be sent back as a lambda response, eg: 
  // res.status(200).send(ics_feed);
  // 3. or be used for other purposes downstream
  return ics_feed;
}