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state_machine

0.1.1
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State Machine implementation in Elixir. It's a structure and optionally a gen_statem powered process. It validates states and transitions for integrity and features seamless Ecto-integration.

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state_machine lib state_machine introspection.ex
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lib/state_machine/introspection.ex 

defmodule StateMachine.Introspection do

  alias StateMachine.{Event, Context}



  @spec all_states(StateMachine.t(any)) :: list(atom)

  def all_states(sm) do

    Map.keys(sm.states)

  end



  @spec all_events(StateMachine.t(any)) :: list(atom)

  def all_events(sm) do

    Map.keys(sm.events)

  end



  @spec allowed_events(Context.t(any)) :: list(atom())

  def allowed_events(ctx) do

    Map.values(ctx.definition.events)

    |> Enum.filter(&Event.is_allowed?(ctx, &1))

    |> Enum.map(& &1.name)

  end

end