Contents

require 'yaml'
require 'time'

class Taxedo::Region
  def initialize(id)
    @id = id
    @data = YAML.load_file(Taxedo.base_data_path + "regions.yml")['taxedo']['regions'][@id]
  end

  def calculate(amount, options={})
    options = { :on => Time.now, :rule => 'standard', :equation_type => 'compiled'}.merge(options)

    receipt = Taxedo::Receipt.new(@id, amount)
    receipt.currency = @data['currency']
    receipt.equation_type = equation_type_from_date(options[:on]).nil? ? options[:equation_type] : equation_type_from_date(options[:on])

    taxes(options[:rule], options[:on]).each do |tax|
      receipt.add_tax tax[0], tax[1]
    end

    return receipt
  end

  private

  def equation_type_from_date(start_at)
    selection = Time.at(0)
    if @data['equation_types'].nil?
      return nil
    else
      @data['equation_types'].each do |equation_start_at, equation|
        equation_start_at = Time.parse(equation_start_at.to_s)
        selection = equation_start_at if equation_start_at <= start_at and equation_start_at > selection
      end
      return @data['equation_types'][selection.strftime('%Y%m%d').to_i]
    end
  end

  def tax_from_start_date(tax_id, start_at)
    selection = Time.at(0)

    @data['taxes'][tax_id].each do |tax_start_at, tax_rate|
      tax_start_at = Time.parse(tax_start_at.to_s)
      selection = tax_start_at if tax_start_at <= start_at and tax_start_at > selection
    end

    return selection.strftime('%Y%m%d').to_i
  end

  def taxes(rule, start_at)
    raise 'TAXEDO: This tax rule doesn\'t exists!' if not @data['rules'][rule]

    @data['rules'][rule].map do |tax_id|
      tax_key = tax_from_start_date(tax_id, start_at)

      [tax_id, @data['taxes'][tax_id][tax_key]]
    end
  end
end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
taxedo-0.0.6	lib/taxedo/region.rb