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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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22
tests/feed-pagination.test.ts
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@@ -3,11 +3,12 @@
* row in a drilled show's episode list (My Shows depth 1) and the Feed
* page's row.
*
* addFeed caches the FULL parsed feed while exposing only the first
* MAX_EPISODES_SUBSCRIBE (20) episodes. `hasMoreEpisodes` reports when the
* cache holds more than the loaded window; `loadMoreEpisodes` advances that
* window in MAX_EPISODES_REFRESH (50) chunks until it is exhausted. This
* pins:
* addFeed caches every episode inside the lifecycle window (the last
* EPISODE_WINDOW_DAYS days — the date bound, not a count) while exposing
* only the first MAX_EPISODES_SUBSCRIBE (20) episodes. `hasMoreEpisodes`
* reports when the cache holds more than the loaded window;
* `loadMoreEpisodes` advances that window in MAX_EPISODES_REFRESH (50)
* chunks until it is exhausted. This pins:
* 1. A freshly subscribed feed with a longer cache reports hasMoreEpisodes.
* 2. loadMoreEpisodes grows that feed's episodes from the cache (no refetch
* needed) and hasMoreEpisodes flips false once the window reaches the end.
@@ -27,6 +28,8 @@ process.env.XDG_CONFIG_HOME = configHome;
import { useFeedStore } from "../src/stores/feed";
import type { Podcast } from "../src/types/podcast";
const HOUR = 3600 * 1000;
interface ServedEpisode {
title: string;
date: string;
@@ -94,10 +97,12 @@ afterAll(() => {
test("loadMoreEpisodes advances one feed's window from the cache, then no-ops", async () => {
const store = useFeedStore();
// 60 episodes: 20 shown at subscribe, 40 held back in the cache.
// 60 episodes: 20 shown at subscribe, 40 held back in the cache. All
// inside the lifecycle window (11h apart ≈ 27.5 days) so every one is
// cacheable — the cache bound is the date window, not a count.
servedEpisodes = Array.from({ length: 60 }, (_, i) => ({
title: `Ep ${60 - i}`,
date: new Date(Date.UTC(2026, 0, 1 + i)).toISOString(),
date: new Date(Date.now() - (60 - i) * 11 * HOUR).toISOString(),
}));
const feedUrl = `http://127.0.0.1:${server!.port}/paged.xml`;
const feed = await store.addFeed(makePodcast(feedUrl), "test-source");
@@ -123,9 +128,10 @@ test("loadMoreEpisodes advances one feed's window from the cache, then no-ops",
test("hasMoreEpisodes stays true across chunked loads until the end", async () => {
const store = useFeedStore();
// 120 episodes: 20 shown, 100 cached — two 50-episode chunks remaining.
// All inside the lifecycle window (5h apart = 25 days).
servedEpisodes = Array.from({ length: 120 }, (_, i) => ({
title: `Ep ${120 - i}`,
date: new Date(Date.UTC(2026, 0, 1 + i)).toISOString(),
date: new Date(Date.now() - (120 - i) * 5 * HOUR).toISOString(),
}));
const feedUrl = `http://127.0.0.1:${server!.port}/paged-chunked.xml`;
const feed = await store.addFeed(makePodcast(feedUrl), "test-source");