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FSM: support "any" state transitions

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Closes #344
This commit is contained in:
fireclawthefox 2020-02-23 14:54:09 +01:00 committed by rdb
parent c59b91f503
commit f21ab509ec
1 changed files with 27 additions and 0 deletions
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27
direct/src/fsm/FSM.py
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@ -153,6 +153,12 @@ class FSM(DirectObject):
# must be approved by some filter function.
defaultTransitions = None
# An enum class for special states like the DEFAULT or ANY state,
# that should be treatened by the FSM in a special way
class EnumStates():
ANY = 1
DEFAULT = 2
def __init__(self, name):
self.fsmLock = RLock()
self._name = name
@ -382,6 +388,27 @@ class FSM(DirectObject):
# accept it.
return (request,) + args
elif FSM.EnumStates.ANY in self.defaultTransitions.get(self.state, []):
# Whenever we have a '*' as our to transition, we allow
# to transit to any other state
return (request,) + args
elif request in self.defaultTransitions.get(FSM.EnumStates.ANY, []):
# If the requested state is in the default transitions
# from any state list, we also alow to transit to the
# new state
return (request,) + args
elif FSM.EnumStates.ANY in self.defaultTransitions.get(FSM.EnumStates.ANY, []):
# This is like we had set the defaultTransitions to None.
# Any state can transit to any other state
return (request,) + args
elif request in self.defaultTransitions.get(FSM.EnumStates.DEFAULT, []):
# This is the fallback state that we use whenever no
# other trnasition was possible
return (request,) + args
# If self.defaultTransitions is not None, it is an error
# to request a direct state transition (capital letter
# request) not listed in defaultTransitions and not