36 lines
1.3 KiB
Python
36 lines
1.3 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 transitions import State
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from tfw.fsm.fsm_base import FSMBase
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class LinearFSM(FSMBase):
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# pylint: disable=anomalous-backslash-in-string
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"""
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This is a state machine for challenges with linear progression, consisting of
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a number of steps specified in the constructor. It automatically sets up 2
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actions (triggers) between states as such:
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(0) -- step_1 --> (1) -- step_2 --> (2) -- step_3 --> (3) ...
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(0) -- step_next --> (1) -- step_next --> (2) -- step_next --> (3) ...
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"""
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def __init__(self, number_of_steps):
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"""
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:param number_of_steps: how many states this FSM should have
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"""
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self.states = [State(name=str(index)) for index in range(number_of_steps)]
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self.transitions = []
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for state in self.states[:-1]:
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self.transitions.append({
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'trigger': f'step_{int(state.name)+1}',
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'source': state.name,
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'dest': str(int(state.name)+1)
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})
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self.transitions.append({
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'trigger': 'step_next',
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'source': state.name,
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'dest': str(int(state.name)+1)
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})
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super(LinearFSM, self).__init__()
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