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vc=66: hybrid feed backfill — RSS-fast + streamInfo-complete

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Cobb asked for views + durations back in the subs feed without
giving up the 5-10× RSS speedup vc=56 bought. Hybrid path:

1. Rust wrapper — new enrich_feed_item(video_url) ->
   EnrichedFeedMetadata { view_count, duration_seconds }. Thin
   wrapper around stream_info that discards the heavy play-URL
   payload. Future opt: parse watch-page HTML JSON state directly
   to skip JS deobf entirely. ~150 lines of pluck logic, punted.

2. EnrichmentStore — new SharedPreferences-lite store keyed by
   videoId, value Enrichment(viewCount, durationSeconds,
   fetchedAt). Bound to Settings.cacheTtl for staleness. Hard cap
   5000 entries with oldest-eviction.

3. SubscriptionFeedViewModel — after the RSS refresh paints,
   enrichVisibleItems() fans out enrichFeedItem for the first 30
   items (skipping any already enriched fresh). Bounded at 8 wide
   so we don't hammer YT; each call ~500ms full streamInfo so
   30 items in ~2s. Runs on StrawApp.globalScope so a
   refresh-cancel doesn't kill the in-flight enrichment.
   mergeFromCache overlays the enrichment via .withEnrichment()
   so RSS rows pick up viewCount + durationSeconds the moment
   they land. The Enrichment store's StateFlow.value is read on
   every merge call; the enrichment-complete handler triggers a
   _ui.update that re-merges.

Net behavior: feed paints instantly from RSS (no view/duration),
~2s later the visible top-N populate with full metadata. Cached
forever (or until TTL/cap). Subsequent opens read straight from
EnrichmentStore.

StrawApp.onCreate inits the new store alongside the existing
SP-backed ones.
This commit is contained in:
Kayos 2026-05-26 13:40:26 -07:00
parent 7156208c3c
commit dd151e322d
5 changed files with 236 additions and 3 deletions
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4
buildSrc/src/main/kotlin/ProjectConfig.kt
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@ -55,6 +55,6 @@ const val NEWPIPE_APPLICATION_ID_NEW = "net.newpipe.app"
// vc=19 / 0.1.0-AE — rust pipeline cutover. Extraction via
// strawcore-core (Sulkta-Coop/strawcore) via the UniFFI wrapper; no
// NewPipeExtractor in the runtime path.
const val STRAW_VERSION_CODE = 65
const val STRAW_VERSION_NAME = "0.1.0-BY"
const val STRAW_VERSION_CODE = 66
const val STRAW_VERSION_NAME = "0.1.0-BZ"
const val STRAW_APPLICATION_ID = "com.sulkta.straw"