Grouping handlers by event

defmodule Felt.Channel.ElementHandler do
  def handle_event(event, payload, socket) when event in ["create", "update", "delete"] do
    with :ok <- ensure_map_editable(socket) do
      do_handle_event(event, payload, socket)
    else
      {:error, reason} ->
        {:reply, {:error, reason}, socket}
    end
  end

  def handle_event(event, payload, socket) do
    # Handle other events
  end

  defp do_handle_event("create", payload, socket) do
    # Create the element
  end

  defp do_handle_event("update", payload, socket) do
    # Update the element
  end

  defp do_handle_event("delete", payload, socket) do
    # Delete the element
  end

  defp ensure_map_editable(socket) do
    case Felt.Maps.check_map_editable(socket.assigns.map_id, socket.assigns.current_user) do
      :ok -> :ok
      {:error, :unauthorized} -> {:error, "Not enough permissions"}
    end
  end
end