Oscommerce - Modifying a Order total Module

[hema77]

Hi, I am trying to modify an oscommerce module and adapt it to the clients needs but have difficulties so was wondering if i could get some help here.

I am trying to modify the code of minimum amount order, so I can have the option of choosing the zone instead of destination. I made some changes, but does not seem to work. Where have I gone wrong? Any idea? This is part of original file:

class ot_minimum_order {
    var $title, $output,$description,$enabled,$sort_order;

    function ot_minimum_order() {
      $this->code = 'ot_minimum_order';
      $this->title = MODULE_ORDER_TOTAL_MINORDER_TITLE . ' (' . MODULE_ORDER_TOTAL_MINORDER_TITLE_INSERT . MODULE_ORDER_TOTAL_MINORDER_ORDER_UNDER . ')';
      $this->description = MODULE_ORDER_TOTAL_MINORDER_DESCRIPTION;
      $this->enabled = ((MODULE_ORDER_TOTAL_MINORDER_STATUS == 'true') ? true : false);
      $this->sort_order = MODULE_ORDER_TOTAL_MINORDER_SORT_ORDER;

      $this->output = array();
    }

    function process() {
      global $order, $currencies;

      if (MODULE_ORDER_TOTAL_MINORDER_LOW_ORDER_FEE == 'true') {
        //Check to see if we are going to use this on this order
        switch (MODULE_ORDER_TOTAL_MINORDER_ZONE) {
          case 'national':
            if ($order->delivery['country_id'] == STORE_COUNTRY) $pass = true; break;
          case 'international':
            if ($order->delivery['country_id'] != STORE_COUNTRY) $pass = true; break;
          case 'both':
            $pass = true; break;
          default:
            $pass = false; break;
        } 

and I changed this to:

   class ot_minimum_order {
        var $title, $output,$description,$enabled,$sort_order;

        function ot_minimum_order() {
          $this->code = 'ot_minimum_order';
          $this->title = MODULE_ORDER_TOTAL_MINORDER_TITLE . ' (' . MODULE_ORDER_TOTAL_MINORDER_TITLE_INSERT . MODULE_ORDER_TOTAL_MINORDER_ORDER_UNDER . ')';
          $this->description = MODULE_ORDER_TOTAL_MINORDER_DESCRIPTION;
          $this->enabled = ((MODULE_ORDER_TOTAL_MINORDER_STATUS == 'true') ? true : false);
          $this->sort_order = MODULE_ORDER_TOTAL_MINORDER_SORT_ORDER;

    if ( ($this->enabled == true) && ((int)ORDER_TOTAL_MINORDER_ZONE > 0) ) {
            $check_flag = false;
            $check_query = tep_db_query("select zone_id from " . TABLE_ZONES_TO_GEO_ZONES . " where geo_zone_id = '" . ORDER_TOTAL_MINORDER_ZONE . "' and zone_country_id = '" . $order->delivery['country']['id'] . "' order by zone_id");
            while ($check = tep_db_fetch_array($check_query)) {
              if ($check['zone_id'] < 1) {
                $check_flag = true;
                break;
              } elseif ($check['zone_id'] == $order->delivery['zone_id']) {
                $check_flag = true;
                break;
              }
            }

            if ($check_flag == false) {
              $this->enabled = false;
            }
          }



          $this->output = array();
        }