Error JRequest

[mehdininja]

hello This part of my plugin code does not work in Joomla 4. Please help to solve the problem

function _postPayment( $data ) { // Process the payment $paction = JRequest::getVar('paction');

    $vars = new JObject();

    switch ($paction)
    {
        case "display_message":
            $vars->message = JText::_('J2STORE_bank_MESSAGE_PAYMENT_ACCEPTED_FOR_VALIDATION');
            $html = $this->_getLayout('message', $vars);
            $html .= $this->_displayArticle();
          break;
        case "process":
            $vars->message = $this->_process();
            //$html = $this->_getLayout('message', $vars);
            //echo $html; // TODO Remove this
            //$app = JFactory::getApplication();
            //$app->close();
            if ($vars->message=='')
            {
                header('location: '. JURI::root()."index.php?option=com_j2store&view=checkout&task=confirmPayment&orderpayment_type=".$_REQUEST['orderpayment_type']."&paction=display_message");
                exit;die;
            }
            else
            {
                header('location: '. JURI::root()."index.php?option=com_j2store&view=checkout&task=confirmPayment&orderpayment_type=".$_REQUEST['orderpayment_type']."&paction=cancel");
                exit;die;
            }

          break;
        case "cancel":
            $vars->message = JText::_( 'J2STORE_bank_MESSAGE_CANCEL' );
            $html = $this->_getLayout('message', $vars);
          break;
        default:
            $vars->message = JText::_( 'J2STORE_bank_MESSAGE_INVALID_ACTION' );
            $html = $this->_getLayout('message', $vars);
          break;
    }

    return $html;
}

[alagesanbe08]

In the realm of Joomla, the 'JRequest' class, once present and utilized in the second version, has been gracefully phased out. In the current iteration, the following enlightened code pattern finds its place

in latest,

    $app = \Joomla\CMS\Factory::getApplication();
    $paction = $app->input->getString('paction',''); 

For a deeper understanding, consider consulting the J2Store 4 PayPal plugin.