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reply_planner.py
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reply_planner.py
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'Plan a reply, as in "document planning" (but this is a reply in a dialogue).'
__author__ = 'Nick Montfort'
__copyright__ = 'Copyright 2011 Nick Montfort'
__license__ = 'ISC'
__version__ = '0.5.0.0'
__status__ = 'Development'
import operator
import random
def determine_speed(action, discourse):
'Returns a number in [0, 1], the speed of narration for this Action.'
if action.salience > 0.75:
speed = discourse.spin['speed'] + ((1-discourse.spin['speed'])/2)
elif (action.verb == 'wait' and
not action.agent == discourse.spin['focalizer']):
# Do not ever narrate other characters waiting (doing nothing).
speed = 0.0
else:
speed = discourse.spin['speed']
return speed
def structure_nodes(nodes, ref_time, speech_time, discourse):
'Return the root node of a reply structure organized using the parameters.'
children = []
last_action_time = None
for node in nodes:
if node.category == 'action':
node.speed = determine_speed(node.info, discourse)
node.prior = last_action_time
last_action_time = node.info.start
if node.speed > 0.0:
discourse.mark_narrated(node.info)
children.append(node)
else:
children.append(node)
return Internal('-', ref_time, speech_time, children)
def produce_analepsis(key_action, previous, concept, discourse):
'Finds an analepsis based on and to be inserted after the key Action.'
if hasattr(key_action, 'direct'):
for action in previous:
if (hasattr(action, 'direct') and
action.direct == key_action.direct and
not concept.item[action.direct] == '@adventurer'):
intro = Commentary("Ah, let's remember ...")
room = NameRoom(action)
tell_action = TellAction(action)
outro = Commentary("Yes, that was a fine recollection.")
return [structure_nodes([intro, room, tell_action, outro],
discourse.follow, key_action.end,
discourse)]
return []
def cull_actions(actions, concept, discourse):
'Remove Actions that should not be narrated at all from a sorted list.'
to_remove = []
to_aggregate = []
post_final = False
for action in actions:
if (action.verb == 'examine' and
not action.agent == discourse.spin['focalizer'] and
action.direct == str(concept.room_of(action.agent))):
to_remove.append(action)
elif action.salience < .2:
to_remove.append(action)
elif post_final:
to_remove.append(action)
if action.final:
post_final = True
for omit in to_remove:
actions.remove(omit)
if discourse.spin['frequency'][0][1] == 'iterative':
if discourse.spin['frequency'][0][0][0] == 'agent':
quality = discourse.spin['frequency'][0][0][1]
for action in actions:
if quality in concept.item[action.agent].qualities:
to_aggregate.append(action)
if len(to_aggregate) >= 2:
for omit in to_aggregate:
actions.remove(omit)
actions.append(to_aggregate)
return actions
def determine_speech_time(discourse):
'Set speech time all the way ahead, or to follow the events, or back.'
if discourse.spin['time'] == 'before':
speech_time = discourse.min
if discourse.spin['time'] == 'during':
speech_time = discourse.follow
if discourse.spin['time'] == 'after':
speech_time = discourse.max
return speech_time
def plan(action_ids, concept, discourse):
'Create a reply structure based on indicated Actions and the spin.'
speech_time = determine_speech_time(discourse)
# Determine which Actions this focalizer knows about.
# Build a list of the appropriate (Action, start time) tuples.
known_id_times = []
if discourse.spin['window'] == 'current':
for i in action_ids:
if i in concept.act:
known_id_times.append((i, concept.act[i].start))
else:
for i in concept.act:
known_id_times.append((i, concept.act[i].start))
# Produce a list of Actions sorted by time.
actions = [concept.act[id_etc[0]] for id_etc in
sorted(known_id_times, key=operator.itemgetter(1))]
if not discourse.spin['window'] == 'current':
actions = actions[-discourse.spin['window']:]
# Remove Actions which won't be narrated at all, aggregate others.
actions = cull_actions(actions, concept, discourse)
if len(actions) == 0:
return Leaf('ok')
if discourse.spin['perfect']:
reference_time = discourse.right_after
else:
reference_time = discourse.follow
# Sort the Actions chronologically to begin with.
actions.sort(key=operator.attrgetter('start'))
if discourse.spin['order'] == 'chronicle':
nodes = [TellAction(i) for i in actions]
reply_plan = structure_nodes(nodes, reference_time, speech_time,
discourse)
elif discourse.spin['order'] == 'retrograde':
actions.reverse()
if speech_time == discourse.follow:
speech_time = actions[0].start
nodes = [TellAction(i) for i in actions]
reply_plan = structure_nodes(nodes, reference_time, speech_time,
discourse)
elif discourse.spin['order'] == 'achrony':
random.shuffle(actions)
nodes = [TellAction(i) for i in actions]
reply_plan = structure_nodes(nodes, reference_time, speech_time,
discourse)
elif discourse.spin['order'] == 'analepsis':
nodes = [TellAction(i) for i in actions]
if actions[-1].id > 4:
limit = actions[-1].id - 4
previous = [concept.act[i] for i in
range(1, limit) if i in concept.act]
analepsis = produce_analepsis(actions[0], previous, concept,
discourse)
nodes = nodes[:1] + analepsis + nodes[1:]
reply_plan = structure_nodes(nodes, reference_time, speech_time,
discourse)
elif discourse.spin['order'] == 'syllepsis':
nodes = [TellAction(i) for i in actions]
reply_plan = structure_nodes(nodes, reference_time, speech_time,
discourse)
return reply_plan
class ReplyNode(object):
'Abstract base class for reply structure nodes.'
def __init__(self, category):
if self.__class__ == ReplyNode:
raise StandardError('Attempt to instantiate abstract base ' +
'class reply_planner.ReplyNode')
self.category = category
class Internal(ReplyNode):
'Internal node in a reply structure, representing organization.'
def __init__(self, category, reference_time, speech_time, children):
self.ref = reference_time
self.speech = speech_time
self.children = children
ReplyNode.__init__(self, category)
def __str__(self):
string = self.category + ' ('
for child in self.children:
string += str(child) + ' '
string = string[:-1] + ') '
return string
class Leaf(ReplyNode):
'Leaf node in a reply structure, representing something to narrate.'
def __init__(self, category, info=None):
if info is not None:
self.info = info
self.speed = None
self.event = None
self.prior = None
if category == 'action' or category == 'room':
self.event = info.start
ReplyNode.__init__(self, category)
def __str__(self):
return self.category + ' ' + str(self.info)
class Commentary(Leaf):
'A statement that does not narrate or describe: "Be careful, dear reader!"'
def __init__(self, info):
Leaf.__init__(self, 'commentary', info)
class NameRoom(Leaf):
'A statement naming the Room in which the Action took place.'
def __init__(self, info):
Leaf.__init__(self, 'room', info)
self.prior = self.event - 0.5
class TellAction(Leaf):
'A statement narrating an Action.'
def __init__(self, info):
Leaf.__init__(self, 'action', info)