The Guessing Game (Elixir 1.6) - ep1 challenge

greeter.ex

defmodule Greeter do
  def greet do
    answer = IO.gets("Hi, nice to meet you, what's your name ?\n")

    case Regex.match?(~r/^[a-z, A-Z ,.'-]+$/, answer) do
      true ->
        greet(answer)

      false ->
        IO.puts("Please enter a valid name.\n")
        greet()
    end
  end

  defp greet(name) do
    case String.downcase(String.trim(name)) do
      "ludovic" -> IO.puts("Ludovic, what a wonderful name!")
      _ -> IO.puts("Hi #{name}!\n")
    end
  end
end