48 lines
1.3 KiB
Python
48 lines
1.3 KiB
Python
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from __future__ import annotations
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import time
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from collections import OrderedDict
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class ViberEventDeduplicator:
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def __init__(self, max_size: int = 4096, ttl_seconds: int = 3600):
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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, event_key: str) -> bool:
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if not event_key:
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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 event_key in self._cache:
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return True
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self._cache[event_key] = 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 _evict_expired(self, now: float) -> None:
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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) -> None:
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self._cache.clear()
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def build_event_dedupe_key(account_id: str, callback: dict) -> str:
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message_token = callback.get("message_token")
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if message_token:
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return f"{account_id}|token:{message_token}"
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event_type = callback.get("event", "unknown")
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sender = callback.get("sender", {})
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sender_id = sender.get("id", "")
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timestamp = callback.get("timestamp", 0)
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return f"{account_id}|{event_type}|{sender_id}|{timestamp}"
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