Tulir Asokan
45 lines
1.5 KiB
Python
45 lines
1.5 KiB
Python
# mautrix-telegram - A Matrix-Telegram puppeting bridge
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# Copyright (C) 2021 Tulir Asokan
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
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from typing import Dict
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from asyncio import Lock
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from ..types import TelegramID
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class FakeLock:
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async def __aenter__(self) -> None:
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pass
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async def __aexit__(self, exc_type, exc, tb) -> None:
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pass
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class PortalSendLock:
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_send_locks: Dict[int, Lock]
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_noop_lock: Lock = FakeLock()
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def __init__(self) -> None:
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self._send_locks = {}
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def __call__(self, user_id: TelegramID, required: bool = True) -> Lock:
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if user_id is None and required:
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raise ValueError("Required send lock for none id")
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try:
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return self._send_locks[user_id]
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except KeyError:
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return (self._send_locks.setdefault(user_id, Lock())
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if required else self._noop_lock)
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