Gamefic.script do
  respond :lock, Use.available do |actor, thing|
    actor.tell "You can't lock #{the thing}."
  end

  respond :lock, Use.available(Lockable, :has_lock_key?), Use.children do |actor, thing, key|
    if thing.lock_key == key
      thing.locked = true
      actor.tell "You lock ##{the thing} with #{the key}."
    else
      actor.tell "You can't lock #{the thing} with #{the key}."
    end
  end

  respond :lock, Use.available(Lockable, :has_lock_key?), Use.available do |actor, thing, key|
    actor.perform :take, key if key.parent != actor
    actor.proceed if key.parent == actor
  end

  interpret "lock :container with :key", "lock :container :key"
end