CoreShop Product Price Calculation

CoreShop uses multiple Price Calculators to determine the correct price for a product. Per default following Calculators are used

These two are only the default implementations, if you need a custom Calculator, you need to implement the Interface

CoreShop\Component\Product\Calculator\ProductPriceCalculatorInterface and register your service with the tag coreshop.product.price_calculator, a type attribute and a priority

What prices does CoreShop calculate?

CoreShop Price Calculation consists of 3 different prices:

Retail Price: Base Price without any discounts
Discount Price: Special Price for promotions. Needs to return a price smaller than retail price, otherwise retail price is valid
Discount: Discount from promotions
Price: Retail Price or Discount Price (if available) minus discount rules

Calculator Service

If you want to calculate the Price for a Product, you need to use a special service to do that. There are two options:

1: coreshop.product.price_calculator which calculates prices without any tax regards.

2: coreshop.product.taxed_price_calculator which calculates prices with tax or without. (recommended one to use)

Templating

If you want to calculate the price within a Template, you can do so by using the filter coreshop_product_price

<?php
echo $this->coreshop_product_price($product);

{{ (product|coreshop_product_price(true)) }}

Custom Price Calculator Example

Our Example Service will take the Property "price" - 1 as Product Price and -1 as Discount, therefore the price stays the same. This example is only a show-case of how to add a new calculator.

CoreShop Price calculation always depends on a context. The context per default consists of following values:

Store

Country

Currency

Customer (if logged in)

Cart

<?php

namespace AppBundle\CoreShop\Product;

use CoreShop\Component\Product\Calculator\ProductPriceCalculatorInterface;
use CoreShop\Component\Product\Model\ProductInterface;

final class CustomPriceCalculator implements ProductPriceCalculatorInterface
{
    /**
     * Used to determine a retail price
     */
    public function getPrice(ProductInterface $subject, array $context, $withDiscount = true)
    {
        $price = $this->getRetailPrice($subject, $context);

        return $withDiscount ? $this->getDiscount($subject, $price) : $price;
    }

    /**
     * Used to determine a retail price
     */
    public function getRetailPrice(ProductInterface $subject, array $context)
    {
        return $subject->getStorePrice($context['store']);
    }

    /**
     * Used to determine a discount
     */
    public function getDiscount(ProductInterface $subject, array $context, $price)
    {
        return 0;
    }

    /**
     * Used to determine a discounted price
     */
    public function getDiscountPrice(ProductInterface $subject, array $context)
    {
        return null;
    }
}

Now we need to register our service to the container and add the calculator tag:

app.coreshop.product.price_calculator.custom:
    class: AppBundle\CoreShop\Product\CustomPriceCalculator
    tags:
      - { name: coreshop.product.price_calculator, type: custom, priority: 1 }

CoreShop now uses our service for all Product Price Calculations.