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https://github.com/avatao-content/baseimage-tutorial-framework
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37 lines
1.4 KiB
Python
37 lines
1.4 KiB
Python
# Copyright (C) 2018 Avatao.com Innovative Learning Kft.
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# All Rights Reserved. See LICENSE file for details.
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from typing import List
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from transitions import Machine
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from tfw.mixins import CallbackMixin
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class FSMBase(CallbackMixin):
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"""
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A general FSM base class you can inherit from to track user progress.
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See linear_fsm.py for an example use-case.
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TFW the transitions library for state machines, please refer to their
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documentation for more information on creating your own machines:
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https://github.com/pytransitions/transitions
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"""
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states, transitions = [], []
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def __init__(self, initial: str = None, accepted_states: List[str] = None):
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CallbackMixin.__init__(self)
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self.accepted_states = accepted_states or [self.states[-1]]
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self.machine = Machine(model=self,
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states=self.states,
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transitions=self.transitions,
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initial=initial or self.states[0],
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send_event=True,
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ignore_invalid_triggers=True,
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after_state_change='execute_callbacks')
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def execute_callbacks(self, event_data):
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self._execute_callbacks(event_data.kwargs)
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def is_solved(self):
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return self.state in self.accepted_states # pylint: disable=no-member
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