patch.php

order.php

<?php
///....

function step4()
   {
       $app = JFactory::getApplication();

       $this->ordering->processRequest(JRequest::get('post'),self::$required_payments_objects);
       $this->order = $this->ordering->getOrder();
       /// begin of patch
       $failUrl = DidwwRoute::_('index.php?option=com_didww&view=order&layout=orderconfirm',false);
       
       if ($this->ordering->pay_system->type == "balance" && $this->order->total_price() > $this->client->deposit) {
           $this->setRedirect($failUrl,JText::_('ORDER_ERROR'),'error');
           $this->redirect();
       }
       /// end of  patch
       $this->saveOrdering($this->ordering);

       if(count($this->ordering->getErrors())){
           $this->addErrors($this->ordering->getErrors());
           return false;
       }

       if(!$this->ordering->checkSubscription()) {
           $app->enqueueMessage(
               JText::sprintf('SUBSCRIPTION_PERIOD_ERROR',
                   $this->ordering->pay_system()->module->label(),
                   $this->ordering->pay_system()->module->label(),
                   $this->ordering->pay_system()->available_periods_string()),
               'error');
           $this->setRedirect('index.php?option=com_didww&view=order&layout=neworder');
           $this->redirect();
       }

       $this->ordering->setGlobalForwarding();
       $this->ordering = $this->order->create($this->ordering, true);
       $this->try_to_pay($this->ordering);

       $this->setConfirmedOrder($this->ordering);
       $this->clearOrdering();

       $form_data = array('option'=>'com_didww','view'=>'order','layout'=>'success');
       $this->setRedirect( DidwwRoute::_('index.php?'.http_build_query($form_data), false) );
       $this->redirect();
   }