Change ticket messaging when camp is closed. (#1404)

public_html/wp-content/plugins/camptix/camptix.php

@@ -5485,10 +5485,14 @@ function form_start() {
 			$this->error( __( "It doesn't look like your form submitted any attendee information. Please try again.", 'wordcamporg' ) );
 		}
 
-		if ( ! $available_tickets ) {
+		if ( ! $available_tickets && ! $this->is_wordcamp_closed() ) {
 			$this->notice( __( 'Sorry, but there are currently no tickets for sale. Please try again later.', 'wordcamporg' ) );
 		}
 
+		if ( $this->is_wordcamp_closed() ) {
+			$this->notice( __( 'This event has completed.', 'wordcamporg' ) );
+		}
+
 		if ( $available_tickets && isset( $this->reservation ) && $this->reservation ) {
 			$this->info( __( 'You are using a reservation, cool!', 'wordcamporg' ) );
 		}
@@ -6871,7 +6875,7 @@ function is_ticket_valid_for_purchase( $post ) {
 		$end_date = absint( $wordcamp->meta['End Date (YYYY-mm-dd)'][0] ?? 0 );
 
 		// Event is finalised.
-		if ( $wordcamp && 'wcpt-closed' === $wordcamp->post_status ) {
+		if ( $this->is_wordcamp_closed() ) {
 			return false;
 		}
 
@@ -8572,6 +8576,16 @@ public function tmp( $key, $value = null ) {
 
 		return $value;
 	}
+
+	/**
+	 * Return whether the wordcamp is closed.
+	 *
+	 * @return bool
+	 */
+	public function is_wordcamp_closed() {
+		$wordcamp = get_wordcamp_post();
+		return 'wcpt-closed' === $wordcamp->post_status;
+	}
 }
 
 // Initialize the $camptix global.