How to change the value of the amount of goods in the minishop2 modx revo cart?

Question

MODX

Good evening, there is a simple online store on minishop2, how to make the amount of goods in the basket increase by 300 rubles, provided that the goods in the basket are less than 5000 rubles?

Answer 1

More or less like this

<?php
switch ($modx->event->name) {
case 'msOnAddToCart':
    $tmp = $cart->get();
   if($tmp['total_cost'] < 5000){
        $tmp[$key]['total_cost'] =  $tmp[$key]['total_cost'] + 300;
        $cart->set($tmp);
    }
    break;

Well, read the documentation.