Calendar sync

Connect each professional’s Google or Outlook calendar: bookings appear on it, and their busy times block the form.

What sync does

The professional’s bookings appear on their calendar, and move or disappear when the booking changes.
Busy times on that calendar block the form, so nobody books over a personal appointment.
The client is added to the event as a guest, so Google or Outlook also sends them an invitation.

There are two parts: you register Nevua once with Google and/or Microsoft, then each professional connects their own calendar.

Under Nevua → Settings → Calendar sync, Nevua shows the Redirect URI (with a copy button) and the steps for each.

Google: in Google Cloud, create an OAuth client ID of the web application type, with Nevua’s redirect URI, and the scopes …/auth/calendar.events and …/auth/calendar.readonly. Paste the client ID and secret into Nevua. While the app is in testing mode at Google, only the test users you list can connect.
Microsoft (Outlook): in the Azure portal, register an app with Nevua’s redirect URI, create a client secret and grant the delegated permissions Calendars.ReadWrite and offline_access. In Nevua, paste the application ID, the secret and the Tenant ID (keep common for any account).

Under Nevua → Professionals → Edit, in the sync section:

Connect calendar: you sign in to the professional’s Google or Microsoft account in a popup; or
Send Link to Professional: Nevua emails them a link to connect it themselves. The link works for 48 hours and needs no WordPress login.

Once connected, it shows the last sync. Sync now pushes their upcoming bookings again; Disconnect stops the sync.

Busy times are read and kept for 5 minutes: a new event on the calendar shows on the form within minutes.
Calendar credentials are stored encrypted with your site’s secret keys (wp-config.php). Changing those keys means connecting the calendars again.
A Google Meet booking uses this same connection.