51 lines
1.4 KiB
Python
51 lines
1.4 KiB
Python
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from __future__ import annotations
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import logging
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import time
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from collections import OrderedDict
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logger = logging.getLogger(__name__)
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class TwitterDeduplicator:
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def __init__(self, max_size: int = 5000, ttl_seconds: int = 86400):
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self._cache: OrderedDict[str, float] = OrderedDict()
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self._max_size = max_size
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self._ttl = ttl_seconds
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def is_duplicate(self, msg_id: str) -> bool:
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if not msg_id:
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return False
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now = time.monotonic()
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self._evict_expired(now)
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if msg_id in self._cache:
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return True
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self._cache[msg_id] = now
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while len(self._cache) > self._max_size:
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self._cache.popitem(last=False)
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return False
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def mark_seen(self, msg_id: str) -> None:
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if not msg_id:
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return
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now = time.monotonic()
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self._evict_expired(now)
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self._cache[msg_id] = now
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def _evict_expired(self, now: float):
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expired = [k for k, v in self._cache.items() if now - v > self._ttl]
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for k in expired:
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del self._cache[k]
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def reset(self):
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self._cache.clear()
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_deduplicators: dict[str, TwitterDeduplicator] = {}
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def get_deduplicator(account_id: str) -> TwitterDeduplicator:
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if account_id not in _deduplicators:
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_deduplicators[account_id] = TwitterDeduplicator()
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return _deduplicators[account_id]
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