Call a function when the cart loads

[6.522]

hi I would like to call / trigger a function when the cart loads but.. don't know how to do that. The function is part of the 3rd party extension mod (AwoCoupon Customer Balance mod) and it's located in www/components/com_awocoupon/controller.php - function apply_voucher_balance(). When the function gets called the apply button gets clicked. By default you must click it manually but I would like to automate that process. I need the simplest solution - it just needs to work. Can it be done by copy and paste?
Greets!

my Jommla: 2.5.28
my Virtuemart: 2.6.22

[Jumbo!]

Create a Joomla system plugin. Check in onAfterDispatch function. Refer - https://docs.joomla.org/Plugin/Events Then use a if clause to check if it is the cart page.

Example plugin:

Code Select Expand

<?php

defined('_JEXEC') or die;

class PlgSystemCustom extends JPlugin
{
public function onAfterDispatch()
{
$app = JFactory::getApplication();

if($app->isAdmin())
{
return false;
}

if(JRequest::getCmd('option') == 'com_virtuemart' && JRequest::getCmd('view') == 'cart' && JFactory::getDocument()->getType() == 'html')
{
// It is cart page after load
// Your codes goes here
}
}
}

[6.522]

Thanks! I will try that

[6.522]

So according to your instructions I've created the plugin but I'cant get this work. 

In the .xml file I have:

Code Select Expand

<?xml version="1.0" encoding="utf-8"?>
<extension version="2.5" type="plugin" group="system">
        <name>awo-auto-apply-balance-on-cart</name>
        <files>
                <filename plugin="awo-auto-apply-balance-on-cart">awo-auto-apply-balance-on-cart.php</filename>
                <filename>index.html</filename>
        </files>
</extension>

and the .php contains:

Code Select Expand

<?php

defined('_JEXEC') or die;

class PlgSystemCustom extends JPlugin
{
public function onAfterDispatch()
{
$app = JFactory::getApplication();

if($app->isAdmin())
{
return false;
}

if(JRequest::getCmd('option') == 'com_virtuemart' && JRequest::getCmd('view') == 'cart' && JFactory::getDocument()->getType() == 'html')
{

function apply_voucher_balance() {
//JRequest::checkToken() or jexit( 'Invalid Token' );

$handlerclass = 'AwoCoupon'.AWOCOUPON_ESTORE.'CouponHandler';
if (!class_exists( $handlerclass )) require JPATH_ADMINISTRATOR.'/components/com_awocoupon/helpers/estore/'.AWOCOUPON_ESTORE.'/couponhandler.php';
call_user_func(array($handlerclass,'process_customer_balance'));

if ($return = JRequest::getVar('return', '', 'BASE64')) {
$return = base64_decode($return);
if (!JUri::isInternal($return)) $data['return'] = '';
}

if (empty($return)) $return = 'index.php?';
JFactory::getApplication()->redirect(JRoute::_($return));

}

}
}
}

[Jumbo!]

It seems you do not have knowledge of PHP coding or on Joomla plugin development. You have an invalid PHP codes and also a invalid Joomla plugin xml with respect to the plugin class.

Please need first correct your PHP codes and call function correctly. Then you need create a correct manifest file for the plugin. Now install it and enable it from Joomla plugin manager. Read this carefully if you want learn more - https://docs.joomla.org/J3.x:Creating_a_Plugin_for_Joomla

I would suggest you better take help from some PHP programmer.

[6.522]

You are right I'm not a programmer but I thought that, with the help of more experienced users, I could try to handle it by myself. Thanks for your help.

[6.522]

That being said since you're a programmer and we have already got so far maybe you could give me a few additional tips? For instance could you tell me what's wrong with my .xml code? - I don't have any errors on install. Also can I use your code (without additional motifications) or it's just an example? And finally what command shoud I use to call my function? Should it be

Code Select Expand

$dispatcher = JDispatcher::getInstance();?
Regards

[6.522]

ok, my mistake "the plugin class" silly error thanks!

[6.522]

One more thing - how to change this plugin to call function not 'when in the cart' but 'when adding to the cart' (or when total in the cart is > 0). ?
Regards