class BankTransfer
  # Formatter
  module DataFormatter
    def format_data(data_collection, data_parser, config)
      row = []
      data_collection.each do |data|
        config.attr_keys.each do |key|
          data_parsed = data_parser.new(data, config)
          attr_data   = data_parsed.send(key)

          row << attr_format(attr_data, config.attrs[key])
        end
        row << "\n"
      end

      row.join
    end

    private

    def attr_format(input, config)
      if [:rigth].include? config[:fill_side]
        input.to_s.ljust(config[:max_length], config[:fill])
      elsif [:left].include? config[:fill_side]
        input.to_s.rjust(config[:max_length], config[:fill])
      end
    end
  end
end