def create_sample_machine_ordered(self, **kwargs):
states = ['A', 'B', 'C']
# See the "alternative initialization" section for an explanation of the 1st argument to init
machine = Machine(None, states, initial='A', **kwargs)
machine.add_ordered_transitions()
# machine.next_state()
# print(machine.state)
# # >>> 'B'
return machine
def create_sample_machine_traffic_light_2state4nested_1(self, **kwargs):
states = [{'name': 'unlit', 'children': ['off', 'blank']}, {'name': 'lit', 'children': ['green', 'yellow', 'red']}]
order = ['unlit_off', 'unlit_blank', 'lit_red', 'lit_green', 'lit_yellow', 'lit_red']
transitions = [
['turned_on', 'unlit_off', 'unlit_blank'],
['commence_shutdown', 'lit_green', 'lit_yellow'],
['power_outage', '*', 'unlit_off']
]
m = Machine(states=states, transitions=transitions, initial='unlit_off', **kwargs)
m.add_ordered_transitions(order)
return m
def create_sample_machine_task(self, **kwargs):
states = ['Unstarted', 'In Progress', 'Completed', 'Cancelled']
order = ['Unstarted', 'In Progress', 'Completed']
transitions = [
['Start', 'Unstarted', 'In Progress'],
['Complete', 'In Progress', 'Completed'],
['Cancel', 'In Progress', 'Cancelled']
]
initial = states[0]
machine = Machine(states=states, transitions=transitions, initial=initial, **kwargs)
machine.add_ordered_transitions(order)
return machine
def create_machine(states, transitions=None, initial=None, order=None, options=None):
if not states:
raise serializers.ValidationError("Invalid value: '{}'".format('states'))
if not transitions:
transitions = []
# raise serializers.ValidationError("Invalid value: '{}'".format('transitions'))
if not initial:
initial = states[0]
options_default = {'auto_transitions': False, 'ignore_invalid_triggers': False}
if options:
# LogUtils.log_object_state(options, level=logging.WARN, name='options', context='original')
options = utils.kwargs_merge(options, options_default)
# LogUtils.log_object_state(options, level=logging.WARN, name='options', context='parsed')
else:
options = options_default
m = Machine(states=states, transitions=transitions, initial=initial, **options)
if order:
m.add_ordered_transitions(order)
return m
def create_sample_machine_traffic_light_2state3nested_2(self, **kwargs):
states = ['off', {'name': 'lit', 'children': ['green', 'yellow', 'red']}]
order = ['off', 'lit_red', 'lit_green', 'lit_yellow', 'lit_red']
transitions = [
['turned_on', 'off', 'lit_red'],
['commence_shutdown', 'lit_green', 'lit_yellow'],
# ['flash_on', 'off', ['lit_green', 'lit_yellow', 'lit_red']],
['flash_on_g', 'off', 'lit_green'],
['flash_on_y', 'off', 'lit_yellow'],
['flash_on_r', 'off', 'lit_red'],
# ['flash_off', ['lit_green', 'lit_yellow', 'lit_red'], 'off'],
['flash_off_g', 'lit_green', 'off'],
['flash_off_y', 'lit_yellow', 'off'],
['flash_off_r', 'lit_red', 'off'],
['poweroutage', '*', 'off']
]
m = Machine(states=states, transitions=transitions, initial='off', **kwargs)
m.add_ordered_transitions(order)
return m
def create_sample_machine_ordered2(self, **kwargs):
# We can also define a different order of transitions
states = ['A', 'B', 'C']
machine = Machine(None, states, initial='A', **kwargs)
machine.add_ordered_transitions(['A', 'C', 'B'])
return machine
def create_sample_machine_traffic_light_4state_1(self, **kwargs):
states = ['green', 'yellow', 'red', 'off']
order = ['off', 'red', 'green', 'yellow', 'red']
m = Machine(states=states, initial='red', **kwargs)
m.add_ordered_transitions(order)
return m