defmodule Ofex.Helpers do
  defp add_decimal_if_needed(str) do
    case String.contains?(str, ".") do
      true -> str
      false -> "#{str}.0"
    end
  end

  def string_to_float(nil), do: nil
  def string_to_float(""), do: nil
  def string_to_float(str) do
    [float_string] = Regex.run(~r/[\d,]+\.?\d*/, str)
    float_string |> add_decimal_if_needed |> String.replace(",","") |> String.to_float
  end
end