todo.ex

defmodule Mix.Tasks.Todo do
  use Mix.Task
  @dir "~/.todos/"

  def run(args) do
    unless File.exists?(@dir), do: File.mkdir!(@dir)

    case args do
      ["all"] ->
        case File.ls!(@dir) do
          [] -> IO.puts("No todos.")
          list -> Enum.each(list, &IO.puts("- #{&1}\n#{File.read!("#{@dir}#{&1}")}\n"))
        end

      ["create", todo] ->
        File.write!("#{@dir}#{:os.system_time(:second)}", todo)

      [action, id] when action in ~w(complete delete) ->
        File.rm!("#{@dir}#{id}")
        
       _else ->
         IO.puts("watcha talkin bout willis")
    end
  end
end