34 lines
1.1 KiB
TypeScript
34 lines
1.1 KiB
TypeScript
// Prevent duplicate processing when WebSocket reconnects or Feishu redelivers messages.
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const DEDUP_TTL_MS = 30 * 60 * 1000; // 30 minutes
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const DEDUP_MAX_SIZE = 1_000;
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const DEDUP_CLEANUP_INTERVAL_MS = 5 * 60 * 1000; // cleanup every 5 minutes
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const processedMessageIds = new Map<string, number>(); // messageId -> timestamp
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let lastCleanupTime = Date.now();
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export function tryRecordMessage(messageId: string): boolean {
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const now = Date.now();
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// Throttled cleanup: evict expired entries at most once per interval.
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if (now - lastCleanupTime > DEDUP_CLEANUP_INTERVAL_MS) {
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for (const [id, ts] of processedMessageIds) {
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if (now - ts > DEDUP_TTL_MS) {
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processedMessageIds.delete(id);
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}
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}
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lastCleanupTime = now;
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}
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if (processedMessageIds.has(messageId)) {
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return false;
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}
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// Evict oldest entries if cache is full.
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if (processedMessageIds.size >= DEDUP_MAX_SIZE) {
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const first = processedMessageIds.keys().next().value!;
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processedMessageIds.delete(first);
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}
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processedMessageIds.set(messageId, now);
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return true;
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}
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