fix(feeds): serve standard sorts from a complete preloaded page - #116
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pkc-js preloads a single sort and only publishes pageCids once that page overflows, so a community or comment whose posts or replies all fit in the preloaded page publishes no other sort. Since 0.1.39 resolvePostSortType and resolveReplySortType only accepted published names, which left feeds empty for standard sorts on small communities and made clients fall back to the preloaded order, losing bump order. Treat a complete preloaded page (no nextCid, no pageCids) as serving every standard sort the feed sorter can compute, expose getPostPageSortType and getReplyPageSortType for the page that serves a sort, sort that page client-side in the feeds and replies stores, apply the time window of top timeframe sorts, and flatten flat reply sorts served from a hierarchical page. Custom sort names and paged records stay strict.
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📝 WalkthroughWalkthroughThe change adds shared page-sort resolution for complete preloaded pages. Feeds and replies can compute standard sorts client-side, apply ChangesClient-side page sorting
Priority: ➖ Normal Estimated code review effort: 4 (Complex) | ~45 minutes Change: Bug fix Sequence Diagram(s)sequenceDiagram
participant Feed
participant getPostPageSortType
participant PreloadedPage
participant getFilteredSortedFeeds
Feed->>getPostPageSortType: request post sort
getPostPageSortType->>PreloadedPage: inspect available page data
getPostPageSortType-->>getFilteredSortedFeeds: return page sort to read
getFilteredSortedFeeds->>PreloadedPage: load complete page
getFilteredSortedFeeds-->>Feed: return client-sorted posts
Merge Risk: 🔵 Low · up to The new page-sort utilities are not consistently available through the package entry point. Restore the required exports before merging to keep the public API surface coherent. 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
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| if (completeSortTypes.some((sortType) => !isFlatSortType(sortType))) { | ||
| return clientSortableSortTypes; |
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When a post's hierarchical page is complete but one of its child replies has a paginated reply chain, this branch advertises newFlat and oldFlat even though the client has only the embedded portion of that chain. getFilteredSortedFeeds consequently flattens an incomplete tree, while getFeedsHaveMore treats the root's missing next-page CID as exhaustion, so users receive a truncated flat reply feed with no way to load the omitted replies. Only derive flat sorts from an already-complete flat page, or first prove and load the entire nested tree.
AGENTS.md reference: AGENTS.md:L45-L45
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| if ( | ||
| clientTimeframeTimestamp !== undefined && | ||
| !post.pinned && | ||
| post.timestamp <= clientTimeframeTimestamp | ||
| ) { |
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For a client-served topHour/topDay/etc. feed, this filters on the preloaded post before getFeedPost replaces it with the fresher version from communitiesPagesStore.comments. Because pinned is mutable moderation state, an old post that is pinned only in the fresher cached version is dropped, while a newly unpinned post whose preloaded version was pinned is retained beyond the window. Apply the timeframe check to the reconciled nextPost instead.
AGENTS.md reference: AGENTS.md:L45-L45
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Inline comments:
In `@src/index.ts`:
- Around line 97-98: Add isFlatSortType and getSortTimeframeSeconds to the
relevant imports and named exports in the index module, and include both
functions in the default hooks object alongside getPostPageSortType and
getReplyPageSortType.
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📒 Files selected for processing (17)
README.mdllms-full.txtsrc/hooks/feeds/feeds.test.tssrc/hooks/feeds/feeds.tssrc/hooks/replies.test.tssrc/index.tssrc/lib/page-sorts.test.tssrc/lib/page-sorts.tssrc/stores/communities-pages/communities-pages-store.test.tssrc/stores/communities-pages/communities-pages-store.tssrc/stores/feeds/utils.test.tssrc/stores/feeds/utils.tssrc/stores/replies-pages/replies-pages-store.tssrc/stores/replies/replies-store.test.tssrc/stores/replies/replies-store.tssrc/stores/replies/utils.test.tssrc/stores/replies/utils.ts
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Bump the package version so CI publishes 0.1.46 with #116.
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Summary
pkc-js preloads a single sort and only publishes
pageCidsonce that page overflows, so a community (or comment) whose posts (or replies) all fit in the preloaded page publishes no other sort. Since 0.1.39resolvePostSortTypeandresolveReplySortTypeonly accepted published names, so requesting a standard sort such asactiveon a small community returned an empty feed. Clients fell back to the preloadedhotorder and lost bump order (5chan v0.9.20 stopped bumping threads on every board that fits in one page).nextCid, nopageCids) now serves every standard sort the feed sorter can compute (hot,new,active,top*for posts;best,new,old, and for a post's repliesnewFlat/oldFlat).getPostPageSortType/getReplyPageSortTypereturn the page that serves a sort; the feeds, communities-pages, replies and replies-pages stores read that page and sort it client-side with the existing sorter, and nested reply feeds register through it.top*sorts computed from a preloaded page apply their time window client-side, keeping pinned posts like pkc-js pages do; a flat reply sort served from a hierarchical page is flattened.llms-full.txtupdated; tests that encoded the strict single-page behavior were rewritten to the new contract, plus new coverage for feeds, replies, nested registration, first page cids and time windows.Verification
yarn type-check,yarn lint(no new warnings),yarn build(dist not committed)yarn knipcleanNote
Medium Risk
Changes core feed/reply sort resolution and ordering across multiple stores; incorrect “complete page” detection could mis-sort or omit posts, though custom sorts and paginated records stay strict.
Overview
Fixes empty feeds when requesting standard sorts (e.g.
active) on small communities or threads where pkc-js only preloads one page and never publishes otherpageCids.Sort resolution now treats a “complete” preloaded page (no
nextCid, nopageCids, not a timeframe-only page) as holding the full set, so standard post/reply sorts become requestable and are re-sorted client-side via the existing feed sorter. Custom or unpublished sorts are still rejected—nothing is silently swapped for another sort. New helpersgetPostPageSortType/getReplyPageSortTypemap a requested sort to the page to read (e.g.active→ preloadedhot);getSortTimeframeSecondsandisFlatSortTypesupport timeframe windows and flat reply behavior.Store wiring: feeds and replies utils load comments from that page sort, apply client
top*time windows (pinned posts kept), and flatten hierarchical pages when serving flat reply sorts. Communities/replies “first page CID” logic and nested reply feed registration follow the same page mapping.Docs (README,
llms-full.txt,useFeedJSDoc) and tests reflect the new contract.Reviewed by Cursor Bugbot for commit 730604c. Bugbot is set up for automated code reviews on this repo. Configure here.
Summary by CodeRabbit
New Features
Documentation