Allow actor to do something in this world, in the context of this circle; return the new state of the actor if something was done, nil if nothing was done. Circle is expected to be one of

• :active - actors within visual/audible range of the player character;
• :pending - actors not in the active circle, but sufficiently close to it that they may enter the active circle within a short period;
• :background - actors who are active in the background in order to handle trade, news, et cetera;
• :other - actors who are not members of any other circle.

The act method must not have side effects; it must only return a new state. If the actor’s intention is to seek to change the state of something else in the game world, it must add a representation of that intention to the sequence which will be returned by its pending-intentions method.

True if this actor is hungry and has no immediate access to food.

Returns a sequence of effects an actor intends, as a consequence of acting.

True if there is a plan in this actor’s schedule which should be activated now. NOTE THAT plans in the daily schedule are NOT activated when in circles :background or :other

Return a plan to resolve any active threat to this actor in this world.

Return a plan to find this actor food in this world.

Return a plan to find this actor a safe place to rest, or if in one, to actually rest, in this world.

Return a plan to advance this actor towards their personal objective, in this world, or nil for default actors with no objective.

Return a plan taken from the schedule of this actor for the current date and time, if any, else nil.

Return a map of scheduled actions for this actor. TODO: work out the detailed format!

True if this actor is threatened in this world.

True if this actor needs rest.