21 lines
486 B
Python
21 lines
486 B
Python
class StateManager:
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def __init__(self):
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self.previous = None
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def update(self, current):
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if current is None or current.get("health") is None:
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return None, None
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# 第一次收到有效数据，只记录，不触发事件
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if self.previous is None:
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self.previous = current
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return None, None
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old = self.previous
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self.previous = current
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return old, current |