ActivityModel::markRead PHP Method

    public function markRead($UserID)
    {
        // Mark all of a user's unread activities read.
        $this->SQL->put('Activity', ['Notified' => self::SENT_OK], ['NotifyUserID' => $UserID, 'Notified' => self::SENT_PENDING]);
        $User = Gdn::userModel()->getID($UserID);
        if (val('CountNotifications', $User) != 0) {
            Gdn::userModel()->setField($UserID, 'CountNotifications', 0);
        }
    }