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32 lines
890 B
Python
32 lines
890 B
Python
from typing import Dict, Generator
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from nonebot.adapters import Event
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from nonebot.params import Depends
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from nonebot.message import IgnoredException, event_preprocessor
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_running_matcher: Dict[str, int] = {}
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async def matcher_mutex(event: Event) -> Generator[bool, None, None]:
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result = False
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try:
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session_id = event.get_session_id()
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except Exception:
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yield result
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else:
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current_event_id = id(event)
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event_id = _running_matcher.get(session_id, None)
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if event_id:
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result = event_id != current_event_id
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else:
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_running_matcher[session_id] = current_event_id
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yield result
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if not result:
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del _running_matcher[session_id]
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@event_preprocessor
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async def preprocess(mutex: bool = Depends(matcher_mutex)):
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if mutex:
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raise IgnoredException("Another matcher running")
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