async def _update_tracker_session(
self,
tracker: DialogueStateTracker,
output_channel: OutputChannel,
) -> None:
"""Check the current session in `tracker` and update it if expired.
An 'action_session_start' is run if the latest tracker session has expired,
or if the tracker does not yet contain any events (only those after the last
restart are considered).
Args:
tracker: Tracker to inspect.
output_channel: Output channel for potential utterances in a custom
`ActionSessionStart`.
"""
if not tracker.applied_events() or self._has_session_expired(tracker):
logger.debug(
f"Starting a new session for conversation ID '{tracker.sender_id}'."
)
await self._run_action(
action=self._get_action(ACTION_SESSION_START_NAME),
tracker=tracker,
output_channel=output_channel,
nlg=self.nlg,
)
self.tracker_store.save(tracker)
async def _update_tracker_session(
self,
tracker: DialogueStateTracker,
output_channel: OutputChannel,
metadata: Optional[Dict] = None,
) -> None:
"""Check the current session in `tracker` and update it if expired.
An 'action_session_start' is run if the latest tracker session has expired,
or if the tracker does not yet contain any events (only those after the last
restart are considered).
Args:
metadata: Data sent from client associated with the incoming user message.
tracker: Tracker to inspect.
output_channel: Output channel for potential utterances in a custom
`ActionSessionStart`.
"""
if not tracker.applied_events() or self._has_session_expired(tracker):
logger.debug(
f"Starting a new session for conversation ID '{tracker.sender_id}'."
)
if metadata:
tracker.events.append(SessionStarted(metadata=metadata))
await self._run_action(
action=self._get_action(ACTION_SESSION_START_NAME,
tracker), # bf
tracker=tracker,
output_channel=output_channel,
nlg=self.nlg,
)
def _is_reminder_still_valid(tracker: DialogueStateTracker,
reminder_event: ReminderScheduled) -> bool:
"""Check if the conversation has been restarted after reminder."""
for e in reversed(tracker.applied_events()):
if MessageProcessor._is_reminder(e, reminder_event.name):
return True
return False # not found in applied events --> has been restarted
async def _revert_fallback_events(
self,
output_channel: OutputChannel,
nlg: NaturalLanguageGenerator,
tracker: DialogueStateTracker,
domain: Domain,
events_so_far: List[Event],
) -> List[Event]:
revert_events = [UserUtteranceReverted(), UserUtteranceReverted()]
temp_tracker = DialogueStateTracker.from_events(
tracker.sender_id,
tracker.applied_events() + events_so_far + revert_events)
while temp_tracker.latest_message and not await self.is_done(
output_channel, nlg, temp_tracker, domain, []):
temp_tracker.update(revert_events[-1])
revert_events.append(UserUtteranceReverted())
return revert_events
