Microweber\Providers\ShopManager::update_quantities PHP Method

    public function update_quantities($order_id = false)
    {
        $order_id = intval($order_id);
        if ($order_id == false) {
            return;
        }
        $res = false;
        $ord_data = $this->get_order_by_id($order_id);
        $cart_data = $this->order_items($order_id);
        if (!empty($cart_data)) {
            $res = array();
            foreach ($cart_data as $item) {
                if (isset($item['rel_type']) and isset($item['rel_id']) and $item['rel_type'] == 'content') {
                    $data_fields = $this->app->content_manager->data($item['rel_id'], 1);
                    if (isset($item['qty']) and isset($data_fields['qty']) and $data_fields['qty'] != 'nolimit') {
                        $old_qty = intval($data_fields['qty']);
                        $new_qty = $old_qty - intval($item['qty']);
                        $new_qty = intval($new_qty);
                        $notify = false;
                        $new_q = array();
                        $new_q['field_name'] = 'qty';
                        $new_q['content_id'] = $item['rel_id'];
                        if ($new_qty > 0) {
                            $new_q['field_value'] = $new_qty;
                        } else {
                            $notify = true;
                            $new_q['field_value'] = '0';
                        }
                        $res[] = $new_q;
                        $upd_qty = $this->app->content_manager->save_content_data_field($new_q);
                        $res = true;
                        if ($notify) {
                            $notification = array();
                            $notification['rel_type'] = 'content';
                            $notification['rel_id'] = $item['rel_id'];
                            $notification['title'] = 'Your item is out of stock!';
                            $notification['description'] = 'You sold all items you had in stock. Please update your quantity';
                            $this->app->notifications_manager->save($notification);
                        }
                    }
                }
            }
        }
        return $res;
    }