Calendar Colorizer

Code.js

/**
 * Lists the next X upcoming events in the user's default calendar.
 * @see https://developers.google.com/calendar/api/v3/reference/events/list
 */
function listNextEvents(e) {
  // Set pre-configured label IDs
  const CUSTOMER_LABEL_ID    = 'C25E7F70-3C29-4D46-B87F-7FB449468931';
  const TRAVEL_LABEL_ID      = 'A1CB409D-AC99-414E-A079-1767AAAFC0D8';
  const PERSONAL_LABEL_ID    = 'A5E64B30-404C-4047-8F2E-25198C6A1286';
  const BLOCK_LABEL_ID       = 'A5E64B30-404C-4047-8F2E-25198C6A1286';
  const FORUM_LABEL_ID       = '7B358992-640C-458C-8B9A-76A6C25972CB';
  const ONE_LABEL_ID         = '9DCC45FC-5489-4036-90EE-6B8004640566';
  const ONE_WAITING_LABEL_ID = '89873B19-681B-4DF2-9532-E84A64AE244D';
  const FORUM_MIN            = 15;
  const MAX_EVENTS           = 25;

  // Search for last Monday to 7 days ahead
  const calendarId = 'primary';
  const now = new Date();
  const day = now.getDay();
  const daysSinceMonday = (day + 6) % 7;
  const startTime = new Date(now);
  //startTime.setDate(now.getDate() - daysSinceMonday);
  startTime.setHours(9, 0, 0, 0);

  // Max MAX_EVENTS results
  const events = Calendar.Events.list(calendarId, {
    timeMin: startTime.toISOString(),
    singleEvents: true,
    orderBy: "startTime",
    maxResults: MAX_EVENTS,
    showHiddenInvitations: true,
  });

  if (!events.items || events.items.length === 0) {
    console.log("No events found.");
    return;
  }

  // Domains to ignore, my domain and Google Meet rooms
  const internalDomains = [
    Session.getActiveUser().getEmail().split("@")[1],
    'whatsaranjit.com',
  ]

  // Iterate through results
  for (event of events.items) {
    if (event.start.date) {
      // All-day event.
      const start = new Date(event.start.date);
      //console.log("%s (%s)", event.summary, start.toLocaleDateString());
      continue;
    }
    const start = new Date(event.start.dateTime);

    // Name the meeting
    console.log(event.summary);

    // There might be no attendees
    const allAttendees = event.attendees || [];
    const attendees = allAttendees
      .map(attendee => attendee)
      .filter(entry => entry.resource !== true)

    // Filter out internal domains
    const externalAttendees = attendees
      .map(attendee => attendee.email.split('@')[1].toLowerCase())
      .filter(domain => !internalDomains.includes(domain))

    const internalAttendees = attendees.filter(
      entry => !externalAttendees.some(
        excluded => excluded.email === entry.email
      )
    );

    // If we find more domains, they're external
    if (externalAttendees.length > 0) {
      console.log(`External meeting: ${event.id}`);
      // Update color
      updateColor(event, CUSTOMER_LABEL_ID);
    }
    // Next check for 2 internal attendees (including myself) ignoring the room
    else if (internalAttendees.length == 2) {
      console.log(`Internal meeting: ${event.id}`);

      const accepted_one = attendees
        .map(attendee => attendee.responseStatus)
        .filter(response => response != 'accepted')

      if (accepted_one.length > 0) {
        // Find if your 1:1 hasn't been accepted yet
        console.log(`Internal meeting - pending acceptance: ${event.id}`);
        // Update color
        updateColor(event, ONE_WAITING_LABEL_ID);
        console.log(`Awaiting response to 1:1 from ${accepted_one}`);
      }
      else {
        // Find if your 1:1 has been accepted yet
        console.log(`Internal meeting - all accepted: ${event.id}`);
        // Update color
        updateColor(event, ONE_LABEL_ID);
      }
    }
    // Next check for attendees greater than FORUM_MIN
    else if (attendees.length > FORUM_MIN) {
      console.log(`Forum meeting: ${event.id}`);
      // Update color
      updateColor(event, FORUM_LABEL_ID);
    }
    // Next check for Travel events
    else if (event.summary.match(/Travel/)) {
      console.log(`Travel meeting: ${event.id}`);
      // Update color
      updateColor(event, TRAVEL_LABEL_ID);
    }
    // Next check for Lunch events
    else if (event.summary.match(/Lunch/)) {
      console.log(`Lunch meeting: ${event.id}`);
      // Only worry about solo events that I created
      if ((event.attendees || []).length > 1) {
        continue;
      }
      // Update color
      updateColor(event, PERSONAL_LABEL_ID);
    }
    // Next look for personal blocks
    else if (event.summary.match(/Block/)) {
      // Only worry about solo events that I created
      if ((event.attendees || []).length > 1) {
        continue;
      }
      console.log(`Blocked meeting: ${event.id}`);
      // Update color
      updateColor(event, BLOCK_LABEL_ID);
    }
    else {
      console.log(`Uncategorized meeting: ${event.id}`);
      // Clear color
      updateColor(event, null);
    }
  }
}

function updateColor(event, color, calendarId = 'primary') {
  console.log(`Current label: ${event.eventLabelId}`);

  // Don't make update if the color is already set
  if (event.eventLabelId == color) {
    return;
  }
  console.log(`Updating ${event.id} to ${color}`);

  try {
    const eventu = {
      eventLabelId: color,
    };

    Calendar.Events.patch(
      eventu,
      calendarId,
      event.id, {
        eventLabelVersion: 1
      }
    );

    console.log(`Successfully updated event: ${event.id} to ${color}`);
  }
  catch (e) {
    console.log(`Fetch threw an exception: ${e}`);
  }
}