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This commit is contained in:
Clove 2026-06-19 18:58:28 +01:00
parent b263580117
commit b3418d1460
2 changed files with 21 additions and 5 deletions
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21
src/profile.ts
View File

@ -99,6 +99,12 @@ function cacheKey(id: string): string {
return `profile:${id}`;
}
/** Base profile freshness window (seconds). Profiles change rarely, so this is
* long by default; override via PROFILE_CACHE_TTL_SECONDS. */
function baseTtl(env: Env): number {
return Math.max(60, Number(env.PROFILE_CACHE_TTL_SECONDS || "1800"));
}
type CachedProfile = Omit<ProfileResult, "source">;
/**
@ -119,11 +125,14 @@ export async function getProfile(
id: string,
ctx?: ExecutionContext
): Promise<ProfileResult | null> {
const ttl = Math.max(60, Number(env.PROFILE_CACHE_TTL_SECONDS || "300"));
const got = await env.PROFILE_CACHE.getWithMetadata(cacheKey(id), "json");
const cached = (got.value as CachedProfile | null) ?? null;
const lastWrite = (got.metadata as { t?: number } | null)?.t ?? 0;
const cacheFresh = !!cached && Date.now() - lastWrite < ttl * 1000;
const meta = got.metadata as { t?: number; ttl?: number } | null;
const lastWrite = meta?.t ?? 0;
// Per-entry TTL is jittered at write time so a big batch of profiles doesn't
// all go stale on the same tick and stampede the rich refresh.
const entryTtlMs = (meta?.ttl ?? baseTtl(env)) * 1000;
const cacheFresh = !!cached && Date.now() - lastWrite < entryTtlMs;
// 1) Fresh rich cache -> serve it without touching Discord at all.
if (cached && cacheFresh) return { ...cached, source: "cache" };
@ -186,6 +195,8 @@ function mergeRichOverBot(cached: CachedProfile, bot: ProfileResult): CachedProf
/** Persist a rich profile so it can drive cache-hits and bot-merge fallbacks. */
async function writeCache(env: Env, id: string, result: ProfileResult): Promise<void> {
// Jitter the freshness window ±20% so entries refresh staggered, not in a burst.
const jitteredTtl = Math.round(baseTtl(env) * (0.8 + Math.random() * 0.4));
await env.PROFILE_CACHE.put(
cacheKey(id),
JSON.stringify({
@ -193,7 +204,9 @@ async function writeCache(env: Env, id: string, result: ProfileResult): Promise<
badges: result.badges,
connected_accounts: result.connected_accounts,
}),
{ expirationTtl: 86400, metadata: { t: Date.now() } }
// Keep the rich blob ~24h so it's available to merge over bot data even
// when it's well past its freshness window.
{ expirationTtl: 86400, metadata: { t: Date.now(), ttl: jitteredTtl } }
);
}

5
wrangler.jsonc
View File

@ -48,6 +48,9 @@
// Comma-separated guild IDs the bot is in that you want monitored.
// Leave empty to monitor every guild the bot can see.
"TRACKED_GUILD_IDS": "",
"PROFILE_CACHE_TTL_SECONDS": "300"
// Profile freshness window (seconds). Profiles change rarely and the
// user-token /profile route is heavily rate-limited, so keep this long.
// Presence stays live via the gateway regardless of this value.
"PROFILE_CACHE_TTL_SECONDS": "1800"
}
}