defmodule LineMessage.Macro do

  defmacro __using__(_) do
    quote do
      import LineMessage.Macro
      alias LineMessage.Event
      alias LineMessage.Message
      alias LineMessage.Reply
    end
  end

  defmacro message(type, [do: block]) do
    quote do
      event_on("message", unquote(type), fn event -> unquote(block) end)
    end
  end

  def event_on(event_type, message_type, func) do
    LineMessage.Event.on(event_type, fn event ->
      if event.type == Atom.to_string(message_type) do
        func.(event)
      end
    end)
  end

end