30 lines
1.1 KiB
TypeScript
30 lines
1.1 KiB
TypeScript
import type { Payload } from "payload";
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import { randomUUID } from "node:crypto";
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const SESSION_IDLE_WINDOW_MS = 30 * 60 * 1000;
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/**
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* Groups events into sessions without any client-side identifier: looks up
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* the most recent event from the same `visitorHash` within the last 30
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* minutes and reuses its sessionId, or mints a new one. One extra indexed
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* read per tracked request - acceptable at this site's traffic volume, and
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* simpler/safer than trying to hold a lock across an unauthenticated,
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* high-frequency public endpoint (unlike lib/booking/lock.ts's advisory
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* lock, an occasional extra spurious session here has no correctness
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* consequences worth the added complexity).
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*/
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export async function resolveSessionId(payload: Payload, visitorHash: string): Promise<string> {
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const since = new Date(Date.now() - SESSION_IDLE_WINDOW_MS).toISOString();
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const { docs } = await payload.find({
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collection: "analytics-events",
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where: {
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and: [{ visitorHash: { equals: visitorHash } }, { createdAt: { greater_than_equal: since } }],
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},
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sort: "-createdAt",
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limit: 1,
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depth: 0,
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});
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return docs[0]?.sessionId ?? randomUUID();
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}
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