Initial commit

lib/providers/home_banner_provider.dart

@@ -0,0 +1,95 @@
+import 'dart:async';
+
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+
+import '../core/contracts/library.dart';
+import '../core/infra/storage/home_page_cache_store.dart';
+import 'di_providers.dart';
+import 'session_provider.dart';
+
+class HomeBannerNotifier extends AsyncNotifier<List<EmbyRawItem>> {
+  @override
+  Future<List<EmbyRawItem>> build() async {
+    final session = ref.watch(activeSessionProvider);
+    if (session == null) return const [];
+
+    final store = await ref.read(homePageCacheStoreProvider.future);
+    final cache = await store.readBanner(session.serverId, session.userId);
+
+    if (cache != null) {
+      unawaited(_refreshBannerFromNetwork(session.serverId, session.userId));
+      return cache.bannerItems;
+    }
+
+    return _fetchAndCacheBanner(session.serverId, session.userId);
+  }
+
+  Future<List<EmbyRawItem>> _fetchAndCacheBanner(
+    String serverId,
+    String userId,
+  ) async {
+    final store = await ref.read(homePageCacheStoreProvider.future);
+    final uc = await ref.read(homeBannerUseCaseProvider.future);
+    final items = await uc.execute();
+    unawaited(
+      store.writeBanner(
+        serverId,
+        userId,
+        HomeBannerCacheData(
+          bannerItems: items,
+          savedAt: DateTime.now().toUtc(),
+        ),
+      ),
+    );
+    return items;
+  }
+
+  Future<void> _refreshBannerFromNetwork(String serverId, String userId) async {
+    try {
+      final uc = await ref.read(homeBannerUseCaseProvider.future);
+      final items = await uc.execute();
+
+      final s = ref.read(activeSessionProvider);
+      if (s == null || s.serverId != serverId || s.userId != userId) return;
+
+      state = AsyncValue.data(items);
+
+      final store = await ref.read(homePageCacheStoreProvider.future);
+      unawaited(
+        store.writeBanner(
+          serverId,
+          userId,
+          HomeBannerCacheData(
+            bannerItems: items,
+            savedAt: DateTime.now().toUtc(),
+          ),
+        ),
+      );
+    } catch (_) {}
+  }
+
+  Future<void> refresh() async {
+    state = const AsyncValue.loading();
+    state = await AsyncValue.guard(() async {
+      final session = ref.read(activeSessionProvider);
+      if (session == null) return const [];
+      return _fetchAndCacheBanner(session.serverId, session.userId);
+    });
+  }
+
+
+  Future<void> softRefresh() async {
+    final session = ref.read(activeSessionProvider);
+    if (session == null) return;
+    if (state.value == null) {
+      await refresh();
+      return;
+    }
+    await _refreshBannerFromNetwork(session.serverId, session.userId);
+  }
+}
+
+final homeBannerProvider =
+    AsyncNotifierProvider<HomeBannerNotifier, List<EmbyRawItem>>(
+      HomeBannerNotifier.new,
+    );