Zahlungsart bei bestimmten Bedingungen nicht anbieten

Hier einige Beispiele wie ein Zahlungsmodul leicht so modifiziert werden kann, dass es nicht angeboten wird, wenn bestimmte Bedingungen erfüllt sind.
Beispielsweise wenn eine bestimmte Versandart gewählt wurde, ein bestimmter Bestellwert überschritten wird oder wenn Artikel aus einer bestimmten Kategorie im Warenkorb sind.

Das Prinzip ist dasselbe wie beim Deaktivieren eines Versandmoduls bei diversen Bedingungen und hier beschrieben:
https://www.zen-cart-pro.at/knowledgebase/versandart-bei-bestimmten-bedingungen-nicht-anbieten/

Beispiele:

Deaktivieren bei Selbstabholung

if (substr_count($_SESSION['shipping']['id'], 'storepickup') !=0) {
$this->enabled = false;
}

Deaktivieren wenn Bestellwert mehr als 1000

if (IS_ADMIN_FLAG === false) {
if ($_SESSION['cart']->show_total() > 1000) $this->enabled = false;
}

Deaktivieren wenn Artikel in Kategorie mit der ID 2

if ((IS_ADMIN_FLAG == false && $_SESSION['cart']->in_cart_check('master_categories_id','2') > 0)) {
$this->enabled = false;
}

Wenn nun z.B. die Zahlungsart Vorkasse durch Banküberweisung (eustandardtransfer) bei Bestellwert von mehr als 1000 Euro nicht angeboten werden soll:

Für die Zahlungsart Banküberweisung die zusätzliche Bedingung einfügen in
includes/modules/payment/eustandardtransfer.php
innerhalb der Funktion

function update_status() {

Dort ist schon eine, die die hinterlegten Länder abfragt und entsprechend sperrt:

// check country
        $dest_country = $order->billing['country']['iso_code_2'] ?? 0;        
        $error = false;
        $countries_table = MODULE_PAYMENT_EUTRANSFER_COUNTRIES; 
        $country_zones = explode(",", $countries_table);
        if (in_array($dest_country, $country_zones)) {            
            $this->enabled = true;
        } else {
            $this->enabled = false;
        }

Unterhalb wird die gewünschte weitere Bedingungen eingefügt:

// deaktivieren bei bestellwert mehr als 1000 
      if (IS_ADMIN_FLAG === false) {
      if ($_SESSION['cart']->show_total() > 1000) $this->enabled = false;
      }

Das komplette Zahlungsmodul sieht nach dieser Änderung dann so aus:

<?php
/**
 * @package paymentMethod 
 * @copyright Copyright 2003-2022 Zen Cart Development Team
 * Zen Cart German Version - www.zen-cart-pro.at
 * @copyright Portions Copyright 2003 osCommerce
 * @license https://www.zen-cart-pro.at/license/3_0.txt GNU General Public License V3.0
 * @version $Id: eustandardtransfer.php deaktiviert bei Bestellwert über 1000 2022-05-29 07:29:14 webchills $
*/

  class eustandardtransfer {
    var $code, $title, $description, $enabled;

// class constructor
    function __construct() {
      global $order;    
      $this->code = 'eustandardtransfer';
      $this->title = MODULE_PAYMENT_EUTRANSFER_TEXT_TITLE;
      $this->description = MODULE_PAYMENT_EUTRANSFER_TEXT_DESCRIPTION;
      $this->sort_order = MODULE_PAYMENT_EUTRANSFER_SORT_ORDER;
      $this->email_footer = MODULE_PAYMENT_EUTRANSFER_TEXT_EMAIL_FOOTER;
      $this->enabled = ((MODULE_PAYMENT_EUTRANSFER_STATUS == 'True') ? true : false);  	 

      if ((int)MODULE_PAYMENT_EUTRANSFER_ORDER_STATUS_ID > 0) {
        $this->order_status = MODULE_PAYMENT_EUTRANSFER_ORDER_STATUS_ID;
      }
      
      if (is_object($order)) $this->update_status();             
    } 

// class methods
    function update_status() {
      global $order, $db;
      
      // check country
        $dest_country = $order->billing['country']['iso_code_2'] ?? 0;        
        $error = false;
        $countries_table = MODULE_PAYMENT_EUTRANSFER_COUNTRIES; 
        $country_zones = explode(",", $countries_table);
        if (in_array($dest_country, $country_zones)) {            
            $this->enabled = true;
        } else {
            $this->enabled = false;
        }
      
      // deaktivieren bei bestellwert mehr als 1000 
      if (IS_ADMIN_FLAG === false) {
      if ($_SESSION['cart']->show_total() > 1000) $this->enabled = false;
      }

      if ( ($this->enabled == true) && ((int)MODULE_PAYMENT_EUTRANSFER_ZONE > 0) ) {
        $check_flag = false;
        $check = $db->Execute("select zone_id from " . TABLE_ZONES_TO_GEO_ZONES . " where geo_zone_id = '" . MODULE_PAYMENT_EUTRANSFER_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;
        }
      }
    }
    
    
    
   
    function javascript_validation() {
      return false;
    }

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

    function pre_confirmation_check() {
      return false;
    }


    function confirmation() {
      return array('title' => MODULE_PAYMENT_EUTRANSFER_TEXT_DESCRIPTION);
    }

    function process_button() {
      return false;
    }

    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_EUTRANSFER_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 ('Allow Bank Transfer Payment', 'MODULE_PAYMENT_EUTRANSFER_STATUS', 'True', 'Do you want to accept bank transfer order payments?', '6', '1', '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 ('Bank Name', 'MODULE_PAYMENT_EUTRANSFER_BANKNAM', '---', 'Your full bank name', '6', '2', now());");
      $db->Execute("insert into " . TABLE_CONFIGURATION . " (configuration_title, configuration_key, configuration_value, configuration_description, configuration_group_id, sort_order, date_added) values ('Bank Account Name', 'MODULE_PAYMENT_EUTRANSFER_ACCNAM', '---', 'The name associated with the account.', '6', '3', now());");
      $db->Execute("insert into " . TABLE_CONFIGURATION . " (configuration_title, configuration_key, configuration_value, configuration_description, configuration_group_id, sort_order, date_added) values ('Bank Account IBAN', 'MODULE_PAYMENT_EUTRANSFER_ACCIBAN', '---', 'International account id.<br>(ask your bank if you don\'t know it)', '6', '6', now());");
      $db->Execute("insert into " . TABLE_CONFIGURATION . " (configuration_title, configuration_key, configuration_value, configuration_description, configuration_group_id, sort_order, date_added) values ('Bank BIC/SWIFT', 'MODULE_PAYMENT_EUTRANSFER_BANKBIC', '---', 'International bank id.<br>(ask your bank if you don\'t know it)', '6', '7', now());");
      $db->Execute("insert into " . TABLE_CONFIGURATION . " (configuration_title, configuration_key, configuration_value, configuration_description, configuration_group_id, sort_order, date_added) values ('Module Sort order of display.', 'MODULE_PAYMENT_EUTRANSFER_SORT_ORDER', '0', 'Sort order of display. Lowest is displayed first.', '6', '8', 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_EUTRANSFER_ZONE', '0', 'If a zone is selected, only enable this payment method for that zone.', '6', '9', '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_EUTRANSFER_ORDER_STATUS_ID', '0', 'Set the status of orders made with this payment module to this value', '6', '10', 'zen_cfg_pull_down_order_statuses(', 'zen_get_order_status_name', now())");
      // EURO-Länder Stand Juni 2010: Belgien, Deutschland, Estland, Finnland, Frankreich, Griechenland, Irland, Italien, Luxemburg, Malta, Niederlande, Österreich, Portugal, Slowakei, Slowenien, Spanien, Zypern
      $db->Execute("insert into " . TABLE_CONFIGURATION . " (configuration_title, configuration_key, configuration_value, configuration_description, configuration_group_id, sort_order, date_added) values ('Countries', 'MODULE_PAYMENT_EUTRANSFER_COUNTRIES', 'BE,DE,EE,FI,FR,GR,IE,IT,LU,NL,AT,PT,SK,SI,ES', 'Enter the countries for which you want to offer moneyorder. Two digit ISO codes, comma separated.', '6', '11', now());");
			// www.zen-cart-pro.at german admin languages_id==43 START
      $db->Execute("insert into " . TABLE_CONFIGURATION_LANGUAGE   . " (configuration_title, configuration_key, configuration_language_id, configuration_description, date_added) values ('Vorauskasse per Banküberweisung anbieten?', 'MODULE_PAYMENT_EUTRANSFER_STATUS', '43', 'Wollen Sie Vorauskasse per Banküberweisung aktivieren?', now())");
      $db->Execute("insert into " . TABLE_CONFIGURATION_LANGUAGE   . " (configuration_title, configuration_key, configuration_language_id, configuration_description, date_added) values ('Bank Name', 'MODULE_PAYMENT_EUTRANSFER_BANKNAM', '43', 'Tragen Sie hier den Namen Ihrer Bank ein', now())");
      $db->Execute("insert into " . TABLE_CONFIGURATION_LANGUAGE   . " (configuration_title, configuration_key, configuration_language_id, configuration_description, date_added) values ('Kontoinhaber', 'MODULE_PAYMENT_EUTRANSFER_ACCNAM', '43', 'Tragen Sie hier den Namen des Kontoinhabers ein.', now())");
      $db->Execute("insert into " . TABLE_CONFIGURATION_LANGUAGE   . " (configuration_title, configuration_key, configuration_language_id, configuration_description, date_added) values ('IBAN', 'MODULE_PAYMENT_EUTRANSFER_ACCIBAN', '43', 'Tragen Sie hier Ihre IBAN ein.', now())");
      $db->Execute("insert into " . TABLE_CONFIGURATION_LANGUAGE   . " (configuration_title, configuration_key, configuration_language_id, configuration_description, date_added) values ('BIC/SWIFT', 'MODULE_PAYMENT_EUTRANSFER_BANKBIC', '43', 'Tragen Sie hier Ihren BIC/SWIFT Code ein.', now())");
      $db->Execute("insert into " . TABLE_CONFIGURATION_LANGUAGE   . " (configuration_title, configuration_key, configuration_language_id, configuration_description, date_added) values ('Sortierreihenfolge', 'MODULE_PAYMENT_EUTRANSFER_SORT_ORDER', '43', 'Anzeigereigenfolge für dieses Modul. Der niedrigste Wert wird zuerst angezeigt.', now())");
      $db->Execute("insert into " . TABLE_CONFIGURATION_LANGUAGE   . " (configuration_title, configuration_key, configuration_language_id, configuration_description, date_added) values ('Bestellstatus', 'MODULE_PAYMENT_EUTRANSFER_ORDER_STATUS_ID', '43', 'Welchen Bestellstatus sollen Bestellungen bekommen, die mit Banküberweisung bezahlt werden?', now())");
      $db->Execute("insert into " . TABLE_CONFIGURATION_LANGUAGE   . " (configuration_title, configuration_key, configuration_language_id, configuration_description, date_added) values ('Zone', 'MODULE_PAYMENT_EUTRANSFER_ZONE', '43', 'Wenn Sie hier eine Zone angeben, ist Banküberweisung nur für Kunden mit Rechnungsadresse in dieser Zone möglich.', now())"); 
      $db->Execute("insert into " . TABLE_CONFIGURATION_LANGUAGE   . " (configuration_title, configuration_key, configuration_language_id, configuration_description, date_added) values ('Länder', 'MODULE_PAYMENT_EUTRANSFER_COUNTRIES', '43', 'Geben Sie hier die Länder an, für die Banküberweisung möglich sein soll. Es empfiehlt sich hier nur Länder einzutragen, die den EURO haben, so dass eine EU-Standardüberweisung möglich ist.<br>Zweistellige ISO-Codes durch Komma getrennt!', now())");   
			// www.zen-cart-pro.at german admin languages_id==43  END
   }
  function remove() {
      global $db;
      $db->Execute("delete from " . TABLE_CONFIGURATION . " where configuration_key in ('" . implode("', '", $this->keys()) . "')");
      // www.zen-cart-pro.at german admin languages_id == delete all
      $db->Execute("delete from " . TABLE_CONFIGURATION_LANGUAGE . " where configuration_key in ('" . implode("', '", $this->keys()) . "')");
    }
	
    function keys() {
      $keys = array('MODULE_PAYMENT_EUTRANSFER_STATUS', 'MODULE_PAYMENT_EUTRANSFER_BANKNAM', 'MODULE_PAYMENT_EUTRANSFER_ACCNAM',  'MODULE_PAYMENT_EUTRANSFER_ACCIBAN', 
					'MODULE_PAYMENT_EUTRANSFER_BANKBIC', 'MODULE_PAYMENT_EUTRANSFER_SORT_ORDER' , 'MODULE_PAYMENT_EUTRANSFER_ORDER_STATUS_ID' , 'MODULE_PAYMENT_EUTRANSFER_ZONE',
                    'MODULE_PAYMENT_EUTRANSFER_COUNTRIES');

      return $keys;
    }
  }