5. Calculating taxes¶

Предупреждение

When using the CoreBundle (i.e: full stack Sylius framework), the taxes are already calculated at each cart change. It is implemented by the TaxationProcessor class, which is called by the OrderTaxationListener`.

In order to calculate tax amount for given taxable, we need to find out the applicable tax rate. The tax rate resolver service is available under sylius.tax_rate_resolver id, while the delegating tax calculator is accessible via sylius.tax_calculator name.

5.1. Resolving rate and using calculator¶

<?php

namespace Acme\ShopBundle\Taxation

use Acme\ShopBundle\Entity\Order;
use Sylius\Bundle\TaxationBundle\Calculator\CalculatorInterface;
use Sylius\Bundle\TaxationBundle\Resolver\TaxRateResolverInterface;

class TaxApplicator
{
    private $calculator;
    private $taxRateResolver;

    public function __construct(
        CalculatorInterface $calculator,
        TaxRateResolverInterface $taxRateResolver,
    )
    {
        $this->calculator = $calculator;
        $this->taxRateResolver = $taxRateResolver;

    }

    public function applyTaxes(Order $order)
    {
        $tax = 0;

        foreach ($order->getItems() as $item) {
            $taxable = $item->getProduct();
            $rate = $this->taxRateResolver->resolve($taxable);

            if (null === $rate) {
                continue; // Skip this item, there is no matching tax rate.
            }

            $tax += $this->calculator->calculate($item->getTotal(), $rate);
        }

        $order->setTaxTotal($tax); // Set the calculated taxes.
    }
}