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module Spree #:nodoc:
class VatCalculator
def self.calculate_tax(order, rates=default_rates)
return 0 if rates.empty?
# note: there is a bug with associations in rails 2.1 model caching so we're using this hack
# (see http://rails.lighthouseapp.com/projects/8994/tickets/785-caching-models-fails-in-development)
cache_hack = rates.first.respond_to?(:tax_category_id)
taxable_totals = {}
order.line_items.each do |line_item|
next unless tax_category = line_item.variant.product.tax_category
next unless rate = rates.find { | vat_rate | vat_rate.tax_category_id == tax_category.id } if cache_hack
next unless rate = rates.find { | vat_rate | vat_rate.tax_category == tax_category } unless cache_hack
taxable_totals[tax_category] ||= 0
taxable_totals[tax_category] += line_item.price * rate.amount * line_item.quantity
end
return 0 if taxable_totals.empty?
tax = 0
taxable_totals.values.each do |total|
tax += total
end
tax
end
def self.calculate_tax_on(product_or_variant)
vat_rates = default_rates
return 0 if vat_rates.nil?
return 0 unless tax_category = product_or_variant.is_a?(Product) ? product_or_variant.tax_category : product_or_variant.product.tax_category
return 0 unless rate = vat_rates.find { | vat_rate | vat_rate.tax_category_id = tax_category.id }
(product_or_variant.is_a?(Product) ? product_or_variant.master_price : product_or_variant.price) * rate.amount
end
# list the vat rates for the default country
def self.default_rates
return [] unless zone_member = ZoneMember.find(:first, :conditions => ["zoneable_id = #{Spree::Config[:default_country_id]} AND zoneable_type = 'Country'"])
TaxRate.find_all_by_zone_id_and_tax_type(zone_member.zone, TaxRate::TaxType::VAT)
end
end
end
Version data entries
6 entries across 6 versions & 1 rubygems