baseimage-tutorial-framework/lib/tfw/linear_fsm.py

23 lines
1.0 KiB
Python

# Copyright (C) 2018 Avatao.com Innovative Learning Kft.
# All Rights Reserved. See LICENSE file for details.
from .fsm_base import FSMBase
class LinearFSM(FSMBase):
# pylint: disable=anomalous-backslash-in-string
"""
This is a state machine for challenges with linear progression, consisting of
a number of steps specified in the constructor. It automatically sets up 2
actions (triggers) between states as such:
(0) -- step_1 --> (1) -- step_2 --> (2) -- step_3 --> (3) ... and so on
\-step_next-/ \-step_next-/ \-step_next-/
"""
def __init__(self, number_of_steps):
self.states = list(map(str, range(number_of_steps)))
self.transitions = []
for index in self.states[:-1]:
self.transitions.append({'trigger': f'step_{int(index)+1}', 'source': index, 'dest': str(int(index)+1)})
self.transitions.append({'trigger': 'step_next', 'source': index, 'dest': str(int(index)+1)})
super(LinearFSM, self).__init__()