Modifying code to make a new gateway

[ersiranjeevi]

Hi guys, am trying to modify OKPAY payment gateway zencart code to add a new payment gateway
not sure what args and where to update it, can someone help, please ???

here is the okpay code, if I want to add a different gateway instead of okpay , how can I do that ??? what changes are needed in the below code ??? i saw western union is using the same code, the changes needed to be done via cpanel/php myadmin database ???

<?php
/*
  $Id: okpay.php, v. 1.0 2010-05-06

 
*/


  class okpay {
    var $code;
    var $title;
    var $description;
    var $enabled;

// class constructor
    function okpay() {
      $this->code = 'okpay';
      $this->title = MODULE_PAYMENT_OKPAY_TEXT_TITLE;
      $this->description = MODULE_PAYMENT_OKPAY_TEXT_DESCRIPTION;
      $this->sort_order = MODULE_PAYMENT_OKPAY_SORT_ORDER;
      $this->enabled = ((MODULE_PAYMENT_OKPAY_STATUS == 'True') ? true : false);
      
      if ((int)MODULE_PAYMENT_OKPAY_ORDER_STATUS_ID > 0) {
        $this->order_status = MODULE_PAYMENT_OKPAY_ORDER_STATUS_ID;
      }
      $this->form_action_url = 'https://www.okpay.com/process.html';
    }

 function update_status() {
      global $db;
      global $order;

      if ( ($this->enabled == true) && ((int)MODULE_PAYMENT_OKPAY_ZONE > 0) ) {
        $check_flag = false;
        $check = $db->Execute("select zone_id from " . TABLE_ZONES_TO_GEO_ZONES . " where geo_zone_id = '" . MODULE_PAYMENT_OKPAY_ZONE . "' and zone_country_id = '" . $order->billing['country']['id'] . "' order by zone_id");
        while (!$check->EOF) {
          if ($check->fields['zone_id'] < 1) {
            $check_flag = true;
            break;
          } elseif ($check->fields['zone_id'] == $order->billing['zone_id']) {
            $check_flag = true;
            break;
          }
          $check->MoveNext();
        }

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

// class methods
    function javascript_validation() {
      return false;
    }

    function selection() {
      return array('id'     => $this->code,
                   'module' => MODULE_PAYMENT_OKPAY_TEXT_CATALOG_LOGO,
                   'icon'   => MODULE_PAYMENT_OKPAY_TEXT_CATALOG_LOGO);
    }

    function pre_confirmation_check() {
      return false;
    }

    function confirmation() {
      return false;
    }

    function process_button() {
      global $db, $order, $currencies;

      //okpay accepted currency
      $ok_cur = array('EUR', 'USD', 'GBP', 'CHF', 'CAD', 'RUR');
      $CUR = $order->info['currency'];
      if (!in_array($CUR,$ok_cur)) {
        $CUR = 'USD';
      }

      $process_button_string = zen_draw_hidden_field('ok_receiver', MODULE_PAYMENT_OKPAY_RECEIVER) .
                               zen_draw_hidden_field('ok_item_1_name', MODULE_PAYMENT_OKPAY_PURCHASE_TITLE) .
                               zen_draw_hidden_field('ok_item_1_article', MODULE_PAYMENT_OKPAY_PURCHASE_ITEMNUM) .
                               zen_draw_hidden_field('ok_item_1_price', number_format($order->info['total'], 2, '.', '')) .
                               zen_draw_hidden_field('ok_currency', $CUR) .
                               zen_draw_hidden_field('ok_return_success', zen_href_link(FILENAME_CHECKOUT_PROCESS, '', 'SSL')) .
                               zen_draw_hidden_field('ok_return_fail', zen_href_link(FILENAME_CHECKOUT_PAYMENT, '', 'SSL'));

      return $process_button_string;
    }

    function before_process() {
      return false;
    }

    function after_process() {
      return false;
    }

    function output_error() {
      return false;
    }

    function check() {
      global $db;
      if (!isset($this->_check)) {
        $check_query = $db->Execute("select configuration_value from " . TABLE_CONFIGURATION . " where configuration_key = 'MODULE_PAYMENT_OKPAY_STATUS'");
        $this->_check = $check_query->RecordCount();
      }
      return $this->_check;
    }

    function install() {
      global $db;
      $db->Execute("insert into " . TABLE_CONFIGURATION . " (configuration_title, configuration_key, configuration_value, configuration_description, configuration_group_id, sort_order, set_function, date_added) values ('Enable OKPAY Module', 'MODULE_PAYMENT_OKPAY_STATUS', 'True', 'Do you want to accept OKPAY payments?', '6', '3', 'zen_cfg_select_option(array(\'True\', \'False\'))', now())");
      $db->Execute("insert into " . TABLE_CONFIGURATION . " (configuration_title, configuration_key, configuration_value, configuration_description, configuration_group_id, sort_order, date_added) values ('Sort order of display.', 'MODULE_PAYMENT_OKPAY_SORT_ORDER', '0', 'Sort order of display. Lowest is displayed first.', '6', '0', now())");
      $db->Execute("insert into " . TABLE_CONFIGURATION . " (configuration_title, configuration_key, configuration_value, configuration_description, configuration_group_id, sort_order, date_added) values ('OKPAY Receiver', 'MODULE_PAYMENT_OKPAY_RECEIVER', '[email protected]', 'Your OKPAY wallet ID, linked email or mobile phone number to which the payment is to be made.', '6', '4', now())");
      $db->Execute("insert into " . TABLE_CONFIGURATION . " (configuration_title, configuration_key, configuration_value, configuration_description, configuration_group_id, sort_order, use_function, set_function, date_added) values ('Payment Zone', 'MODULE_PAYMENT_OKPAY_ZONE', '0', 'If a zone is selected, only enable this payment method for that zone.', '6', '2', 'zen_get_zone_class_title', 'zen_cfg_pull_down_zone_classes(', now())");
      $db->Execute("insert into " . TABLE_CONFIGURATION . " (configuration_title, configuration_key, configuration_value, configuration_description, configuration_group_id, sort_order, set_function, use_function, date_added) values ('Set Order Status', 'MODULE_PAYMENT_OKPAY_ORDER_STATUS_ID', '0', 'Set the status of orders made with this payment module to this value', '6', '0', 'zen_cfg_pull_down_order_statuses(', 'zen_get_order_status_name', now())");
      
    }


    function remove() {
      global $db;
      $db->Execute("delete from " . TABLE_CONFIGURATION . " where configuration_key in ('" . implode("', '", $this->keys()) . "')");
    }

    function keys() {
      return array('MODULE_PAYMENT_OKPAY_STATUS', 'MODULE_PAYMENT_OKPAY_SORT_ORDER', 'MODULE_PAYMENT_OKPAY_RECEIVER', 'MODULE_PAYMENT_OKPAY_ZONE', 'MODULE_PAYMENT_OKPAY_ORDER_STATUS_ID');
    }
  }

?>