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wongi_engine

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A pure-Elixir rule engine.

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wongi_engine lib wongi engine dsl ncc.ex
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lib/wongi/engine/dsl/ncc.ex 

defmodule Wongi.Engine.DSL.NCC do

  @moduledoc false

  defstruct subchain: []

  def new(subchain), do: %__MODULE__{subchain: subchain}



  defimpl Wongi.Engine.DSL.Clause do

    import Wongi.Engine.Compiler



    alias Wongi.Engine.Beta.NCC

    alias Wongi.Engine.Compiler

    alias Wongi.Engine.DSL.Clause



    def compile(%@for{subchain: subchain}, context) do

      subchain_context =

        Enum.reduce(subchain, context, fn clause, context ->

          Clause.compile(clause, context)

        end)



      {node, partner} = NCC.new_pair(context.node_ref, subchain_context.node_ref)



      %Compiler{rete: rete} = advance(subchain_context, partner)



      context

      |> put_rete(rete)

      |> advance(node)

    end

  end

end