def check_state(self, state: State) -> bool:
"""Check that a state satisfies the constraints."""
fail = Proposition("fail", [])
constraints = state.all_applicable_actions(self.constraints)
for constraint in constraints:
if state.is_applicable(constraint):
# Optimistically delay copying the state
copy = state.copy()
copy.apply(constraint)
if copy.is_fact(fail):
return False
return True
def is_triggering(self, state: State) -> bool:
""" Check if this event would be triggered in a given state. """
return state.is_applicable(self.condition)
def has_failed(self, state: State) -> bool:
""" Check whether the quest has failed. """
if self._quest.fail_action is None:
return False
return state.is_applicable(self._quest.fail_action)
def is_completed(self, state: State) -> bool:
""" Check whether the quest is completed. """
return state.is_applicable(self._quest.win_action)