The procedure to build a Google Workspace add-on that provides Google Calendar third-party conferencing solutions is essentially the same as the procedure for building Google Workspace add-ons, with a few additional steps (shown in bold below):
- Choose an add-on project owner and collaborators.
- Create an Apps Script project.
- Design your add-on appearence and behavior.
- Enable the Calendar advanced service.
- Configure the add-on project manifest.
- Write code to define the add-on's appearance and behavior, using the built-in Apps Script Card service.
- Verify your add-on's OAuth scopes.
- Test the add-on within the host applications it extends.
- Publish the add-on.
This page provides a general overview of each of the new steps (see Building Google Workspace add-ons for an overview of the other steps).
Enable the Calendar advanced service
The Calendar advanced service service lets you call the Calendar REST API directly from an Apps Script project. Some common operations such as calendar event syncs can only be performed using the advanced service. Before you can use the advanced service, you must enable it for your add-on project.
You can enable the Calendar advanced service from the Apps Script editor. Be sure to enable the API in both the editor Advanced Google Services dialog and the Google API console.
Define conference solutions in the manifest
The add-on manifest provides the basic information that Google Calendar needs
to display and activate the add-on conference solutions correctly. Your add-on
manifest must define (in its
one or more conference solutions that describe the types of third-party
conferences Google Calendar events can use.
See Manifests for details on how to configure your add-on's manifest.
Add code to create and sync conferences
Once you have created a script project, you can begin adding code to define the add-on's conferencing-related behavior. You can use the Calendar advanced service, the ConferenceData service, and other Apps Script services to control this behavior.
Refer to the add-on style guide as you code for guidelines on how to design your add-on user experience.
Your add-on must be able to take information about the Google Calendar event
and use it to create a conference on the third-party conference system. You
must implement one or more
onCreateFunction methods that execute this
process, and configure these methods in your add-on manifest.
For more details, see Create third-party conferences.
Sync calendar changes
After a conference is created and linked to a Google Calendar event, the conference often needs to be updated to reflect changes in the event. For example, if a user changes the time of the event, the conference data in the third-party conferencing system needs to be updated to reflect this. The process of updating the conference data in response to event changes is called syncing.
For more details, see Sync calendar changes.
You may wish to have optional settings that let users configure your add-on. For example, you may want to let users to set conference parameters or notes that are attached to the conference.
Whenever you want to provide users some degree of control over the add-on behavior, you can provide those options in an add-on settings page. This is a web page (either hosted by the add-on script or else hosted externally) that is opened when the user accesses the add-on settings within the Google Calendar UI.
Creating an add-on settings page is optional. For more details, see Add settings.