tax_cloud_calculator.rb

class Spree::Calculator::TaxCloudCalculator < Spree::Calculator
  NEXUS_STATES = ['FL']
  
  def self.description
    "Tax Cloud Calculator"
  end

  def compute(object)
    # given an order, we need to lookup the taxes from TaxCloud by using the hard-coded origin
    return 0 unless object.is_a?(Spree::Order) and object.ship_address and object.line_items.size > 0 and NEXUS_STATES.include?(object.ship_address.state.abbr)
    
    Rails.cache.fetch [object, "taxcloud"] do
      order = object
    
      transaction = TaxCloud::Transaction.new(
        :customer_id => order.user_id,
        :cart_id => order.number,
        :origin => origin,
        :destination => destination(order.ship_address))
      
      order.line_items.each_with_index do |line_item, index|
        transaction.cart_items << TaxCloud::CartItem.new(
          :index => index,
          :item_id => line_item.variant.sku,
          :tic => ENV['TAXCLOUD_TIC'], 
          :price => line_item.price,
          :quantity => line_item.quantity)      
      end
    
      lookup = transaction.lookup
      lookup.tax_amount
    end
  end
  
  private
    def origin
      TaxCloud::Address.new(
        :address1 => '2510 NE 47TH ST',
        :address2 => '',
        :city => 'LIGHTHOUSE PT',
        :state => 'FL',
        :zip5 => '33064')
    end
  
    def destination(ship_address)
      TaxCloud::Address.new(
        :address1 => ship_address.address1,
        :address2 => ship_address.address2,
        :city => ship_address.city,
        :state => ship_address.state.abbr,
        :zip5 => ship_address.zipcode.strip.slice(0, 5))    
    end
end