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#
# documentSignoffDemo.py
#
# Example of a state machine modeling the state of a document in a document
# control system, using named state transitions
#
import statemachine
import documentsignoffstate
class Document:
def __init__(self):
# start light in Red state
self._state = documentsignoffstate.New()
@property
def state(self):
return self._state
# get behavior/properties from current state
def __getattr__(self, attrname):
attr = getattr(self._state, attrname)
if isinstance(getattr(documentsignoffstate, attrname, None),
documentsignoffstate.DocumentRevisionStateTransition):
return lambda : setattr(self, '_state', attr())
return attr
def __str__(self):
return "{}: {}".format(self.__class__.__name__, self._state)
def run_demo():
import random
doc = Document()
print(doc)
# begin editing document
doc.create()
print(doc)
print(doc.state.description)
while not isinstance(doc._state, documentsignoffstate.Approved):
print('...submit')
doc.submit()
print(doc)
print(doc.state.description)
if random.randint(1,10) > 3:
print('...reject')
doc.reject()
else:
print('...approve')
doc.approve()
print(doc)
print(doc.state.description)
doc.activate()
print(doc)
print(doc.state.description)
if __name__ == '__main__':
run_demo()
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