/**
  * Updates the team metadata (membership list).
  *
  * This is called by WordPress's `save_post_{$post->post_type}` hook.
  *
  * @link https://developer.wordpress.org/reference/hooks/save_post_post-post_type/
  *
  * @global $_POST
  *
  * @uses wp_verify_nonce()
  * @uses WP_Buoy_Team::remove_member()
  * @uses WP_Buoy_Team::get_member_ids()
  * @uses WP_Buoy_Team::add_member()
  *
  * @param int $post_id
  * @param WP_Post $post
  *
  * @return void
  */
 public static function saveTeam($post_id, $post)
 {
     $team = new self($post_id);
     // Remove any team members indicated.
     if (isset($_POST[self::$prefix . '_choose_team_nonce']) && wp_verify_nonce($_POST[self::$prefix . '_choose_team_nonce'], self::$prefix . '_choose_team')) {
         if (isset($_POST['remove_team_members'])) {
             foreach ($_POST['remove_team_members'] as $id) {
                 $team->remove_member($id);
             }
         }
     }
     // Add a new team member
     if (isset($_POST[self::$prefix . '_add_team_member_nonce']) && wp_verify_nonce($_POST[self::$prefix . '_add_team_member_nonce'], self::$prefix . '_add_team_member')) {
         $add_team_member_input = $_POST[self::$prefix . '_add_team_member'];
         $user_id = username_exists($add_team_member_input);
         if (false !== $user_id) {
             if (!in_array($user_id, $team->get_member_ids())) {
                 $team->add_member($user_id);
             }
         } else {
             if (is_email($add_team_member_input)) {
                 $email = $add_team_member_input;
                 $user = get_user_by('email', $email);
                 if ($user) {
                     $team->add_member($user->ID);
                 } else {
                     $team->invite_user($email);
                 }
             }
         }
     }
     // If this is the user's only team, make this the default one.
     $cnt = count(get_posts(array('post_type' => $post->post_type, 'author' => $post->post_author, 'fields' => 'ids')));
     if (0 === $cnt) {
         $team->make_default();
     }
 }