Files
minstrel/flutter_client/lib/app.dart
T
bvandeusen 335940cf23 feat(cache): outbound mutation queue for offline-resilient REST
User intent (likes, hides, playlist adds, Lidarr requests, cancels)
now persists across network loss. Controllers write their optimistic
local state to drift first, then try the REST call; on failure
the call is enqueued in cached_mutations rather than rolled back.
MutationReplayer drains the queue on connectivity transitions and
a 1-minute periodic tick.

**Infrastructure (schema 8):**
* CachedMutations table — id / kind / payload (JSON) / createdAt
  / lastAttemptAt / attempts. Drop-after-5-attempts semantics: a
  permanently-failing mutation eventually drops, and next sync
  reconciles drift to the server's authoritative state.
* MutationQueue.enqueue / pendingCount
* MutationReplayer.start + .drain — start fires from app.dart's
  postFrameCallback alongside SyncController / Prefetcher / etc.
* Kind registry: like.add / like.remove / quarantine.flag /
  quarantine.unflag / playlist.append / request.create /
  request.cancel — each with a Ref+payload handler that re-fires
  the corresponding REST call.

**Wired surfaces:**
* LikesController.toggle — optimistic drift like/unlike stays
  across REST failure; queues the call. Drops the old rollback.
* MyQuarantineController.flag / .unflag — same pattern. Hide/unhide
  visibly persists offline; replays when back online.
* addToPlaylistActionProvider — now does an optimistic
  cached_playlist_tracks write (position = max + 1) so the
  playlist detail screen shows the new track instantly. Queues
  appendTracks on REST failure.
* DiscoverScreen._request — queues request.create on DioException.
  No drift state for the request itself (myRequestsProvider is
  still REST-only) so the row won't show on /requests until replay
  succeeds — acceptable for v1.
* MyRequestsController.cancel — optimistic in-memory remove no
  longer restores on failure; queues request.cancel instead.

**Test update:**
quarantine_provider_test "flag rolls back on server failure"
renamed and rewritten to assert the new offline behavior:
optimistic drift row persists, mutation is enqueued for replay.

**Out of scope (v2):**
* Playlist create / rename / delete (no Flutter UI exposes these yet)
* Lidarr request optimistic local row (would need a cached_requests
  drift table)
* UI "syncing N pending changes" indicator (operator preference:
  silent unless we find a concrete need)
2026-05-14 18:27:05 -04:00

74 lines
2.9 KiB
Dart

import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'cache/cache_filler.dart';
import 'cache/metadata_prefetcher.dart';
import 'cache/mutation_queue.dart';
import 'cache/prefetcher.dart';
import 'cache/sync_controller.dart';
import 'shared/live_events_dispatcher.dart';
import 'shared/routing.dart';
import 'theme/theme_data.dart';
import 'theme/theme_mode_provider.dart';
class MinstrelApp extends ConsumerStatefulWidget {
const MinstrelApp({super.key});
@override
ConsumerState<MinstrelApp> createState() => _MinstrelAppState();
}
class _MinstrelAppState extends ConsumerState<MinstrelApp> {
@override
void initState() {
super.initState();
// Activate offline-mode infrastructure once the first frame ships.
// SyncController.sync() is connectivity-aware (no-ops on no auth /
// no server URL), so calling it unconditionally is safe.
// Reading prefetcherProvider runs its constructor, which wires the
// queue + settings listeners.
WidgetsBinding.instance.addPostFrameCallback((_) {
// ignore: unawaited_futures
ref.read(syncControllerProvider.notifier).sync();
ref.read(prefetcherProvider);
// Metadata prefetcher: when /api/home returns, fire background
// albumProvider/artistProvider reads for the top-N items in
// each section so subsequent taps are drift hits, not network
// round trips.
ref.read(metadataPrefetcherProvider);
// Live events (#392): subscribes to /api/events/stream and
// invalidates publicly-scoped providers when relevant events
// arrive. Also installs an AppLifecycleState observer for
// resume-time defensive invalidation.
ref.read(liveEventsDispatcherProvider);
// Cache filler: background sweeper that walks cached_artists
// / cached_albums for missing relations and fetches the
// per-entity detail so tapping an artist surfaces albums
// immediately (drift hit, no /api/artists/:id round-trip at
// tap time). First sweep 10s after launch; every 5 minutes
// thereafter. Throttled 200ms between requests so it never
// competes with user activity.
ref.read(cacheFillerProvider);
// Mutation replayer: drains the cached_mutations queue when
// connectivity comes back. Controllers (LikesController,
// MyQuarantineController, the add-to-playlist + request flows)
// enqueue on REST failure so user intent persists across
// network loss instead of getting rolled back.
ref.read(mutationReplayerProvider);
});
}
@override
Widget build(BuildContext context) {
final router = ref.watch(routerProvider);
final mode = ref.watch(themeModeProvider).value ?? AppThemeMode.system;
return MaterialApp.router(
title: 'Minstrel',
theme: buildLightTheme(),
darkTheme: buildDarkTheme(),
themeMode: mode.materialMode,
routerConfig: router,
);
}
}