han

defmodule Han.Slugify do
  @moduledoc """
  Read the pinyin tone file and generate functions to normalize the tone.
  """
  alias Han.Pinyin.Util

  Util.get_tone_data()
  |> Stream.map(fn {pinyin, ascii, _tone} ->
    defp process(unquote(pinyin) <> rest, _acc) do
      unquote(:binary.bin_to_list(ascii)) ++ process(rest)
    end
  end)
  |> Enum.to_list()

  defp process(<<ch, rest::binary>>, acc) do
    [ch | process(rest, acc)]
  end

  defp process("", acc) do
    :binary.bin_to_list(acc)
  end

  def process(content) do
    content |> process("") |> IO.iodata_to_binary()
  end
end