shitty code

shitty.rb

def create_calculations_by_product_ids(ids)
    actual_product_ids = product_ids

    destroy_product_ids = (actual_product_ids - ids).uniq
    calculations.in(product_id: destroy_product_ids).destroy_all

    new_product_ids = (ids - actual_product_ids).uniq
    new_products = Product.find(new_product_ids)

    new_products.each do |product|
      done_lamps = [] # TODO: remove this work around (it is here to avoid duplicated calculation entries)!

      product.lamps.each do |lip|
        next if done_lamps.include? lip.id # TODO: remove this work around (it is here to avoid duplicated calculation entries)!

        calculation = calculations.build({product_id: product.id, lamp_in_product_id: lip.id})
        calculation.save_and_update_cache

        done_lamps << lip.id # TODO: remove this work around (it is here to avoid duplicated calculation entries)!
      end
    end
  end
  
  def utilization_coefficient
      surface_colors = @ambient.surface_colors
      utilization_coefficients = @product.photometric_sheets
                                         .where(lamp_id: @lamp.id)
                                         .first
                                         .utilization_coefficients
      photo_sheet = LightingCalculator::PhotometricSheet.new(surface_colors,
                                                             utilization_coefficients)

      lower_uc = photo_sheet.utilization_coefficient_for_rcl(@ambient.rcl.floor)
      upper_uc = photo_sheet.utilization_coefficient_for_rcl(@ambient.rcl.ceil)

      diff_uc = upper_uc - lower_uc
      diff_rcl = (@ambient.rcl.floor - @ambient.rcl) / 100

      lower_uc + diff_rcl * diff_uc
    end