configured_ed.ex

defmodule Rsed.EventDispatcher do
  defmacro __using__(opts) do
    name = Keyword.get(opts, :name)
    quote do

      use GenServer
      # rest of our functions 
        
      defp my_name() do
        unquote(name)
      end
      
      def init(:ok) do
        # if there's configure function, call it and set initial state 
        listeners = if Keyword.has_key?(__MODULE__.__info__(:functions), :configure) do
          apply(__MODULE__, :configure, [])
        else
          %{}
        end

        {:ok, listeners}
      end
    end  
  end   
end