public function interval_string($string, $email)
 {
     if ($email->interval_type == 'before_tribe_event_starts' || $email->interval_type == 'after_tribe_event_ends') {
         $string = sprintf(__('%d %s %s'), $email->interval_num, FollowUpEmails::get_duration($email->interval_duration), FollowUpEmails::get_trigger_name($email->interval_type));
     }
     return $string;
 }
                ?>
</a></span>
                            </div>
                        </td>
                        <td>
                            <?php 
                $interval_str = '';
                $meta = maybe_unserialize($email->meta);
                if ($email->interval_type == 'signup') {
                    $interval_str = sprintf(__('%d %s after user signs up', 'follow_up_emails'), $email->interval_num, FollowUpEmails::get_duration($email->interval_duration, $email->interval_num));
                } elseif ($email->interval_type == 'order_total_above') {
                    $interval_str = sprintf(__('%d %s when %s %s%s'), $email->interval_num, FollowUpEmails::get_duration($email->interval_duration), FollowUpEmails::get_trigger_name($email->interval_type), get_woocommerce_currency_symbol(), $meta['order_total_above']);
                } elseif ($email->interval_type == 'order_total_below') {
                    $interval_str = sprintf(__('%d %s when %s %s%s'), $email->interval_num, FollowUpEmails::get_duration($email->interval_duration), FollowUpEmails::get_trigger_name($email->interval_type), get_woocommerce_currency_symbol(), $meta['order_total_below']);
                } elseif ($email->interval_duration != 'date') {
                    $interval_str = sprintf(__('%d %s %s'), $email->interval_num, FollowUpEmails::get_duration($email->interval_duration), FollowUpEmails::get_trigger_name($email->interval_type));
                } else {
                    $send_date = !empty($email->send_date_hour) ? $email->send_date . ' ' . $email->send_date_hour . ':' . $email->send_date_minute . ' ' . $meta['send_date_ampm'] : $email->send_date;
                    $interval_str = sprintf(__('Send on %s'), $send_date);
                }
                echo apply_filters('fue_interval_str', $interval_str, $email);
                ?>
                        </td>
                        <td>
                            <?php 
                echo $email->usage_count;
                ?>
                        </td>
                        <td>
                            <?php 
                echo $email->always_send == 1 ? __('Yes', 'follow_up_emails') : __('No', 'follow_up_emails');
 public function interval_string($string, $email)
 {
     if ($email->interval_type == 'points_greater_than') {
         $meta = maybe_unserialize($email->meta);
         $string = sprintf(__('%d %s %s %d'), $email->interval_num, FollowUpEmails::get_duration($email->interval_duration), FollowUpEmails::get_trigger_name($email->interval_type), $meta['points_greater_than']);
     }
     return $string;
 }