'Set Google Calendar Event Description with AddOn

Goal

Im working on building a Google Calendar modify the description of a Google Calendar Event.

Problem

I do not see how to edit the event description. I followed this tutorial to start building the AddOn.

I also found this documentation that shows how to edit the attendees, but I have not been able to figure out how to edit the description of an event from within an AddOn.

Added info

Visual representation of the goal

Output from `eventUpdateTrigger`

The below object shows that the eventId is not given to the eventUpdateTrigger callback

    "hostApp": "calendar",
    "commonEventObject": {
        "platform": "WEB",
        "hostApp": "CALENDAR"
    },
    "calendar": {
        "organizer": {
            "email": "<email>"
        },
        "capabilities": {
            "canSetConferenceData": true,
            "canAddAttendees": true,
            "canSeeConferenceData": true,
            "canSeeAttendees": true
        },
        "calendarId": "[email protected]",
        "id": "<id>"
    },
    "clientPlatform": "web"
}

Solution 1:^[1]

What's wrong with using setDescription and setTitle

function saveDescriptionAndTitle(obj) {
  let cal = CalendarApp.getCalendarById(obj.calid);
  let ev = cal.getEventById(obj.evid);
  ev.setTitle(obj.title);
  ev.setDescription(obj.desc);
}

Solution 2:^[2]

For this, you will need to be required to call google APIs there is no method to directly update the event description without an API

API Ref. - https://developers.google.com/calendar/api/v3/reference/events/update

In AppScript there 1 class that you can use to call that API might be that helps you

https://developers.google.com/apps-script/reference/calendar/calendar-app?hl=en#setdescriptiondescription

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution	Source
Solution 1
Solution 2	Manish Pareek