defmodule Exconv.Parser do
  
  def to_code(<<>>) do
    <<194, 152>> # Undefined
  end
  def to_code("      ") do
    <<194, 152>> # Undefined
  end
  def to_code(string) do
    string
    |> String.split("+")
    |> Enum.map(&parse/1)
    |> Enum.sum
  end

  def to_unicode!(module, string, result \\ [])
  def to_unicode!(_table, "", result), do: result |> Enum.reverse() |> Enum.reject(&is_nil/1) |> List.to_string()
  def to_unicode!(module, <<head, tail::binary>>, result) do
    to_unicode!(module, tail, [module.to_unicode(head) | result])
  end

  defp parse(string) do
    case string |> String.trim_leading("0x") |> Integer.parse(16) do
      {code, ""} ->
        code
      :error ->
        IO.inspect(string, binaries: :as_binaries)
    end
  end
end