straw/rust
Kayos 544035b30c vc=32: subs feed — dates, watched filter, infinite scroll, avatar fallback
Subscription feed is now actually a feed instead of a teaser.

Rust (strawcore wrapper)
  Added upload_date_relative and uploader_avatar to SearchItem so
  Kotlin can see both. strawcore-core already extracts upload_date
  relative ("2 days ago") on every StreamInfoItem and uploader_avatars
  on most — we were just throwing them away in from_core. Fixed.

StreamItem
  uploadDateRelative + uploaderAvatar fields added. Every construction
  site (search/channel/detail/feed) plumbs them through.

SubscriptionFeedViewModel
  Per-channel cap 5 → 30. With 30 subs that's up to 900 items in
  memory; ConcurrentHashMap entries are small enough.
  Sort by parsed relative recency (RECENCY_RE on the "N <unit> ago"
  string, signed seconds-ago, tied items break by viewCount).
  Opportunistic avatar backfill: every successful channelInfo fetch
  updates the stored ChannelRef.avatar via Subscriptions.updateAvatar
  when strawcore returns a non-null avatar — fixes the "I just subbed
  to a channel and the chip has no icon" case where the channel header
  parser missed the avatar at subscribe time but the feed-fetch
  layout returns one.

SubsPane (StrawHome)
  Hide-watched FilterChip (session-sticky). Cross-references
  History.watches by 11-char YT video ID; filters out anything you've
  already watched. "All caught up — nothing unwatched" empty state.
  Infinite scroll: PAGE_SIZE = 20. derivedStateOf-gated snapshotFlow
  watches the LazyListState's lastVisibleItem index; when within 5
  items of the bottom, bumps visibleCount by 20. "Loading more..."
  spinner at the bottom while there's more to show.
  Visible-count resets to PAGE_SIZE when the underlying list shrinks
  (refresh dropped items, filter just engaged).
  FeedRow now shows: uploader · views · "3 days ago".

SubChip
  Lettered fallback when ch.avatar is null. PrimaryContainer-tinted
  circle with the first letter — no more broken-image placeholder
  while the feed-fetch backfills the real avatar.

SubscriptionsStore
  updateAvatar(url, avatar) for the backfill path. Atomic via
  updateAndGet, persists to SharedPreferences.
2026-05-25 12:34:02 -07:00
..
strawcore vc=32: subs feed — dates, watched filter, infinite scroll, avatar fallback 2026-05-25 12:34:02 -07:00
Cargo.toml v0.1.0-V (vc=9): U-3 — streamInfo via rustypipe drives VideoDetail+Player 2026-05-24 08:52:43 -07:00
README.md v0.1.0-U (vc=8): Phase U-1 + U-2 — Rust core + rustypipe search 2026-05-24 08:36:50 -07:00

rust/ — strawcore: Rust YouTube core for Straw

Phase U- of the Straw build. Goal: replace the Java NewPipeExtractor dependency with a Rust core (rustypipe + tokio + reqwest), exposed to the Kotlin/Compose UI via UniFFI. Compose UI stays in Kotlin — only the YouTube/Innertube fetching layer moves to Rust.

Phases

Phase What
U-1 Toolchain + UniFFI smoke test (hello_from_rust) round-tripping through JNA. No real APIs yet.
U-2 rustypipe search. SearchViewModel calls the Rust core.
U-3 rustypipe streamInfo + streams. VideoDetailViewModel + PlayerViewModel use it.
U-4 rustypipe channel + tabs. ChannelViewModel + SubscriptionFeedViewModel.
U-5 Rip NewPipeExtractor Java dep. Measure APK + cold-fetch latency before/after.
U-6 (stretch) SponsorBlock + RYD HTTP through reqwest + tokio in the same lib.

Build chain

crafting-table
├── rustup stable (target add: aarch64-linux-android, armv7-linux-androideabi,
│                  x86_64-linux-android, i686-linux-android)
├── cargo-ndk      (cross-compile helper)
├── android-sdk    (ANDROID_HOME, sdkmanager, build-tools, platforms)
└── android-ndk    (ANDROID_NDK_HOME, r27c LTS at /caches/android-sdk/ndk/...)

Gradle (strawApp/build.gradle.kts)
├── cargoBuild         Exec task → cargo ndk -t <abi>... -o jniLibs/ build --release
├── uniffiBindgen      Exec task → cargo run --bin uniffi-bindgen ... --library libstrawcore.so
└── source-set wiring  generated Kotlin lands in strawApp/src/main/java/uniffi/strawcore/

Runtime (StrawApp.onCreate)
├── System.loadLibrary("strawcore")
└── uniffi.strawcore.initLogging()

Why UniFFI (and not raw JNI / JNA bindings)

  • Hand-written JNI: tedious, error-prone, every type change is two files (Kotlin + Rust) that must stay in sync.
  • Raw JNA: better, but you still hand-write the Kotlin side and worry about string ownership.
  • UniFFI: write Rust, annotate with #[uniffi::export], get a Kotlin shim generated. Strings, structs, enums, Result types, async functions all cross the boundary transparently. The runtime is JNA under the hood.

When in doubt

  • cargo check -p strawcore --target aarch64-linux-android — fast iteration.
  • cargo run --bin uniffi-bindgen -- generate ... — regenerate Kotlin bindings.
  • adb logcat -s strawcore — Rust log::info!() lands here.
  • aapt dump badging strawApp/build/outputs/apk/debug/strawApp-debug.apk — inspect what ABIs/native-libs the APK carries.