set default status in the transformer

includes/activitypub/transformer/class-event.php

@@ -168,6 +168,13 @@ abstract class Event extends Post {
 		return null;
 	}
 
+	/**
+	 * Default value for the event status.
+	 */
+	protected function get_status(): ?string {
+		return 'CONFIRMED';
+	}
+
 	/**
 	 * Compose a human readable formatted start time.
 	 */

includes/activitypub/transformer/class-the-events-calendar.php

@@ -94,7 +94,7 @@ final class The_Events_Calendar extends Event {
 	 *
 	 * @return string status of the event
 	 */
-	public function get_status() {
+	public function get_status(): ?string {
 		if ( 'canceled' === $this->tribe_event->event_status ) {
 			return 'CANCELLED';
 		}