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feat(feed): make episode cache bound user-configurable (date window or count)

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Add episodeCacheMode/count/days preferences (default: date, 60 days).
Apply the bound when reading instead of writing, so a preference change
takes effect without a refetch; the full parse cache stays intact so
fetch-more can page beyond the bound. Thread the window through
load/saveFeedsToFile and update tests and task docs.
This commit is contained in:
Michael Freno
2026-08-12 15:41:22 -04:00
parent 4127fd1181
commit 26729fa5e6
16 changed files with 431 additions and 160 deletions
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24
tests/feed-retention.test.ts
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@@ -2,7 +2,7 @@
* Bounded-feed-lifecycle persistence tests — task 01 (retention window).
*
* Pins the persistence contract:
* 1. saveFeedsToFile never writes an episode older than PERSISTED_WINDOW_DAYS
* 1. saveFeedsToFile never writes an episode older than DEFAULT_EPISODE_WINDOW_DAYS
* unless its id is a completed download in downloads.json.
* 2. loadFeedsFromFile prunes over-window episodes from legacy configs and
* rewrites config.json when it pruned anything.
@@ -27,7 +27,7 @@ const configHome = mkdtempSync(join(tmpdir(), "podtui-retention-"));
process.env.XDG_CONFIG_HOME = configHome;
import {
PERSISTED_WINDOW_DAYS,
DEFAULT_EPISODE_WINDOW_DAYS,
episodeIsPersistable,
loadFeedsFromFile,
saveFeedsToFile,
@@ -134,18 +134,18 @@ afterAll(() => {
// ── Unit: episodeIsPersistable ──────────────────────────────────────────────
test("episodeIsPersistable drops a 40-day-old episode that is not downloaded", () => {
test("episodeIsPersistable drops a 70-day-old episode that is not downloaded", () => {
const ep = makeEpisode({
id: "old-plain-id",
pubDate: new Date(Date.now() - 40 * DAY),
pubDate: new Date(Date.now() - 70 * DAY),
});
expect(episodeIsPersistable(ep, new Set(), new Date())).toBe(false);
});
test("episodeIsPersistable keeps a 40-day-old episode whose id is a completed download", () => {
test("episodeIsPersistable keeps a 70-day-old episode whose id is a completed download", () => {
const ep = makeEpisode({
id: "old-downloaded-id",
pubDate: new Date(Date.now() - 40 * DAY),
pubDate: new Date(Date.now() - 70 * DAY),
});
expect(
episodeIsPersistable(ep, new Set(["old-downloaded-id"]), new Date()),
@@ -165,8 +165,8 @@ test("episodeIsPersistable keeps an episode with an invalid pubDate", () => {
expect(episodeIsPersistable(ep, new Set(), new Date())).toBe(true);
});
test("PERSISTED_WINDOW_DAYS is 30", () => {
expect(PERSISTED_WINDOW_DAYS).toBe(30);
test("DEFAULT_EPISODE_WINDOW_DAYS is 60", () => {
expect(DEFAULT_EPISODE_WINDOW_DAYS).toBe(60);
});
// ── Save path: retention window applied with completed-download exemption ──
@@ -199,11 +199,11 @@ test("saveFeedsToFile prunes over-window episodes but keeps completed downloads"
}),
makeEpisode({
id: "old-plain-id",
pubDate: new Date(Date.now() - 40 * DAY),
pubDate: new Date(Date.now() - 70 * DAY),
}),
makeEpisode({
id: "old-downloaded-id",
pubDate: new Date(Date.now() - 40 * DAY),
pubDate: new Date(Date.now() - 70 * DAY),
}),
]);
saveFeedsToFile([feed]);
@@ -249,7 +249,7 @@ test("loadFeedsFromFile prunes over-window episodes and rewrites config.json", a
description: "",
audioUrl: "https://example.com/audio/old-a.mp3",
duration: 60,
pubDate: new Date(Date.now() - 40 * DAY).toISOString(),
pubDate: new Date(Date.now() - 70 * DAY).toISOString(),
},
{
id: "old-b",
@@ -258,7 +258,7 @@ test("loadFeedsFromFile prunes over-window episodes and rewrites config.json", a
description: "",
audioUrl: "https://example.com/audio/old-b.mp3",
duration: 60,
pubDate: new Date(Date.now() - 40 * DAY).toISOString(),
pubDate: new Date(Date.now() - 70 * DAY).toISOString(),
},
],
visibility: "public",