Contents

class Calculator::Vat < Calculator

  def self.description
    I18n.t("vat")
  end

  def self.register
    super
    TaxRate.register_calculator(self)
  end

  def self.calculate_tax_on(product_or_variant)
    product = product_or_variant.try(:product) || product_or_variant

    (product_or_variant.price * product.effective_tax_rate).round(2, BigDecimal::ROUND_HALF_UP)
  end

  # computes vat for line_items associated with order, and tax rate and 
  # now coupon discounts are taken into account in tax calcs
  # and tax is added to shipment if :shipment_inc_vat is set
  # coupons and shipment are applied if this object is the rate for the default category
  #           (also items with no category get this rate applied)
  def compute(order)
    rate = self.calculable
    tax = 0

    if rate.tax_category.is_default 
      order.adjustments.each do | adjust |
        next if adjust.originator_type == "TaxRate"
        next if adjust.originator_type == "ShippingMethod" and not Spree::Config[:shipment_inc_vat]

        tax += (adjust.amount * rate.amount).round(2, BigDecimal::ROUND_HALF_UP)
      end
    end

    order.line_items.each do  | line_item|
      if line_item.product.tax_category  #only apply this calculator to products assigned this rates category
        next unless line_item.product.tax_category == rate.tax_category
      else
        next unless rate.tax_category.is_default # and apply to products with no category, if this is the default rate
      end
      tax += (line_item.price * rate.amount).round(2, BigDecimal::ROUND_HALF_UP) * line_item.quantity
    end

    tax
  end
end

Version data entries

2 entries across 2 versions & 1 rubygems

Version	Path
spree_core-0.70.0.rc2	app/models/calculator/vat.rb
spree_core-0.70.RC1	app/models/calculator/vat.rb