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fix(feeds): enforce freshness window (#52)

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lazyGPT07 2026-06-13 23:54:53 -06:00 • committed by GitHub
parent 90fffb124e
commit be530ab687
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19
plugins/feed-discovery/src/discovery.ts
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@ -15,6 +15,7 @@ export async function discoverFeeds(query: FeedDiscoveryQuery, options: { provid
q: query.q.trim(),
type: query.type ?? "all",
limit: clampLimit(query.limit),
freshnessDays: normalizeFreshnessDays(query.freshnessDays),
includeUnvalidated: query.includeUnvalidated ?? false,
includeDeadFeeds: query.includeDeadFeeds ?? false
};
@ -54,6 +55,7 @@ export async function discoverFeeds(query: FeedDiscoveryQuery, options: { provid
const validated = await validateCandidates(candidates.slice(0, Math.max((resolvedQuery.limit ?? 25) * 2, 25)), resolvedQuery, config);
const scored = validated
.filter((feed) => !resolvedQuery.type || resolvedQuery.type === "all" || feed.kind === resolvedQuery.type)
.filter((feed) => isWithinFreshnessWindow(feed.lastPublishedAt, resolvedQuery.freshnessDays))
.map((feed) => scoreFeed(feed, resolvedQuery));
const results = dedupeFeeds(scored).slice(0, resolvedQuery.limit ?? 25);
@ -111,6 +113,23 @@ function clampLimit(limit: number | undefined) {
return Math.min(Math.max(Math.trunc(limit), 1), 100);
}
function normalizeFreshnessDays(freshnessDays: number | undefined) {
return typeof freshnessDays === "number" && Number.isFinite(freshnessDays) && freshnessDays > 0
? freshnessDays
: undefined;
}
function isWithinFreshnessWindow(lastPublishedAt: string | undefined, freshnessDays: number | undefined) {
if (freshnessDays === undefined) {
return true;
}
if (!lastPublishedAt) {
return false;
}
const ageMs = Date.now() - Date.parse(lastPublishedAt);
return Number.isFinite(ageMs) && ageMs >= 0 && ageMs <= freshnessDays * 86_400_000;
}
function safeCanonical(url: string) {
try {
return canonicalizeUrl(url);