Module: SunatInvoice::TradeCalculations

Included in:
TradeDocument
Defined in:
lib/sunat_invoice/trade_calculations.rb

Instance Method Summary collapse

Instance Method Details

#calculate_sale_totals ⇒ Object 



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# File 'lib/sunat_invoice/trade_calculations.rb', line 20

def calculate_sale_totals
  @sale_totals = {}
  # get bi totals according kind of sale (gravado, inafecto, exonerado ..)
  lines&.each do |item|
    # TODO: I think in most cases only be one tax for item, but should
    #       handle more cases
    total_code = get_total_code(item.taxes.first)
    if total_code
      @sale_totals[total_code] = 0 unless @sale_totals[total_code]
      @sale_totals[total_code] = (@sale_totals[total_code] + item.bi_value)
                                 .round(2)
    end
  end
end

#calculate_taxes_totals ⇒ Object 



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# File 'lib/sunat_invoice/trade_calculations.rb', line 35

def calculate_taxes_totals
  # concat item's sale_taxes
  @taxes_totals = {}
  taxes = lines&.map(&:sale_taxes)&.flatten
  taxes&.each do |tax|
    @taxes_totals[tax.keys.first] ||= 0
    new_sum = (@taxes_totals[tax.keys.first] + tax.values.sum).round(2)
    @taxes_totals[tax.keys.first] = new_sum
  end
end

#calculate_total ⇒ Object 



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# File 'lib/sunat_invoice/trade_calculations.rb', line 13

def calculate_total
  # calculate invoice total
  sales_sum = @sale_totals.reject { |k, _v| k == '1004' }.values.sum
  @total = (@taxes_totals.values.sum + sales_sum).round(2)
  @total -= discount if discount
end

#get_total_code(tax) ⇒ Object 



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# File 'lib/sunat_invoice/trade_calculations.rb', line 46

def get_total_code(tax)
  return unless tax

  case tax.tax_type
  # TODO: :isc
  when :igv
    get_total_igv_code(tax.tax_exemption_reason)
  end
end

#get_total_igv_code(exemption_reason) ⇒ Object 



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# File 'lib/sunat_invoice/trade_calculations.rb', line 56

def get_total_igv_code(exemption_reason)
  if Catalogs::CATALOG_07.first == exemption_reason
    Catalogs::CATALOG_14.first
  elsif Catalogs::CATALOG_07[1..6].include?(exemption_reason)
    Catalogs::CATALOG_14[3]
  elsif Catalogs::CATALOG_07[7] == exemption_reason
    Catalogs::CATALOG_14[2]
  elsif Catalogs::CATALOG_07[8] == exemption_reason
    Catalogs::CATALOG_14[1]
  elsif Catalogs::CATALOG_07[9..14].include?(exemption_reason)
    Catalogs::CATALOG_14[3]
  end
end

#prepare_totals ⇒ Object 



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# File 'lib/sunat_invoice/trade_calculations.rb', line 7

def prepare_totals
  calculate_taxes_totals
  calculate_sale_totals
  calculate_total
end