defmodule EzcontainerRailwayWeb.AnonSession do
  import Plug.Conn

  def init(default), do: default

  def call(conn, _opts) do
    case get_session(conn, :anon_id) do
      nil -> 
        anon_id = generate_anon_id()
        conn
        |> put_session(:anon_id, anon_id)
        |> assign(:anon_id, anon_id)
      id ->
        conn |> assign(:anon_id, id)
    end
  end

  defp generate_anon_id() do
    :crypto.strong_rand_bytes(16)
    |> Base.encode64()
    |> binary_part(0, 16)
  end
end