defmodule Retex.Fact.Relation do
  @moduledoc "Attribute values that a Wme should have in order for this condition to be true"
  defstruct name: nil, from: nil, to: nil, via: nil

  def new(fields) do
    via = to_string(fields[:from]) |> String.downcase() |> Kernel.<>("_id")
    rel = struct(__MODULE__, fields)
    Map.put(rel, :via, via)
  end
end