Magento 2 break down quote into component parts

magento2-order-items.php

<?php

class SomeClass
{
    public function __construct(
        \StripeIntegration\Payments\Helper\Generic $helper,
        \Magento\Framework\Session\Generic $session,
        \StripeIntegration\Payments\Model\Config $config,
        \Magento\Checkout\Model\Cart $cart,
        \Magento\Framework\Locale\Resolver $localeResolver
    ) {
        $this->helper = $helper;
        $this->session = $session;
        $this->config = $config;
        $this->cart = $cart;
        $this->localeResolver = $localeResolver;
    }

    public function getOrderItems($quote)
    {
        $items = [];
        $useStoreCurrency = $this->config->getConfigData('use_store_currency');
        $tax = 0;
        $discount = 0;
        $shipping = 0;

        if ($useStoreCurrency)
        {
            $currency = $quote->getQuoteCurrencyCode();
            if (!$quote->getIsVirtual())
            {
                $shippingAddress = $quote->getShippingAddress();
                $shipping = $shippingAddress->getShippingAmount();
                $tax += $shippingAddress->getShippingTaxAmount();
            }

            $discount = $quote->getSubtotal() - $quote->getSubtotalWithDiscount();
        }
        else
        {
            $currency = $quote->getBaseCurrencyCode();
            if (!$quote->getIsVirtual())
            {
                $shippingAddress = $quote->getShippingAddress();
                $shipping = $shippingAddress->getBaseShippingAmount();
                $tax += $shippingAddress->getBaseShippingTaxAmount();
            }

            $discount = $quote->getBaseSubtotal() - $quote->getBaseSubtotalWithDiscount();
        }

        $cents = $this->helper->isZeroDecimal($currency) ? 1 : 100;

        $quoteItems = $quote->getAllVisibleItems();
        foreach ($quoteItems as $item)
        {
            if ($useStoreCurrency)
            {
                $amount = $item->getRowTotal();
                $tax += $item->getTaxAmount();
            }
            else
            {
                $amount = $item->getBaseRowTotal();
                $tax += $item->getBaseTaxAmount();
            }

            $items[] = [
                "type" => "sku",
                "parent" => $item->getSku(),
                "description" => $item->getName(),
                "quantity" => $item->getQty(),
                "currency" => $currency,
                "amount" => round($amount * $cents)
            ];
        }

        if ($tax > 0)
        {
            $items[] = [
                "type" => "tax",
                "description" => "Tax",
                "currency" => $currency,
                "amount" => round($tax * $cents)
            ];
        }

        if ($discount > 0)
        {
            $items[] = [
                "type" => "discount",
                "description" => "Discount",
                "currency" => $currency,
                "amount" => -round($discount * $cents)
            ];
        }

        if ($shipping > 0)
        {
            $items[] = [
                "type" => "shipping",
                "description" => "Shipping",
                "currency" => $currency,
                "amount" => round($shipping * $cents)
            ];
        }

        return $items;
    }
}