577 lines
19 KiB
Dart
577 lines
19 KiB
Dart
import 'dart:async';
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import 'package:flutter/material.dart';
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import 'package:flutter/services.dart';
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import 'package:flutter/scheduler.dart';
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import 'package:flutter_riverpod/flutter_riverpod.dart';
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import 'package:riverpod_annotation/riverpod_annotation.dart';
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import '../providers/app_providers.dart';
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import '../../features/auth/providers/unified_auth_providers.dart';
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import '../services/navigation_service.dart';
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import '../services/app_intents_service.dart';
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import '../models/conversation.dart';
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import '../services/background_streaming_handler.dart';
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import '../services/persistent_streaming_service.dart';
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import '../services/socket_service.dart';
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import '../../features/onboarding/views/onboarding_sheet.dart';
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import '../../features/chat/providers/chat_providers.dart';
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import '../../shared/theme/theme_extensions.dart';
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import '../services/connectivity_service.dart';
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import '../utils/debug_logger.dart';
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import '../models/server_config.dart';
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part 'app_startup_providers.g.dart';
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enum _ConversationWarmupStatus { idle, warming, complete }
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final _conversationWarmupStatusProvider =
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NotifierProvider<
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_ConversationWarmupStatusNotifier,
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_ConversationWarmupStatus
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>(_ConversationWarmupStatusNotifier.new);
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final _conversationWarmupLastAttemptProvider =
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NotifierProvider<_ConversationWarmupLastAttemptNotifier, DateTime?>(
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_ConversationWarmupLastAttemptNotifier.new,
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);
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class _ConversationWarmupStatusNotifier
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extends Notifier<_ConversationWarmupStatus> {
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@override
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_ConversationWarmupStatus build() => _ConversationWarmupStatus.idle;
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void set(_ConversationWarmupStatus status) => state = status;
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}
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class _ConversationWarmupLastAttemptNotifier extends Notifier<DateTime?> {
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@override
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DateTime? build() => null;
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void set(DateTime? value) => state = value;
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}
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void _scheduleConversationWarmup(Ref ref, {bool force = false}) {
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final navState = ref.read(authNavigationStateProvider);
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if (navState != AuthNavigationState.authenticated) {
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ref
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.read(_conversationWarmupStatusProvider.notifier)
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.set(_ConversationWarmupStatus.idle);
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return;
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}
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final connectivity = ref.read(connectivityServiceProvider);
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if (!connectivity.isAppForeground) {
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return;
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}
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final isOnline = ref.read(isOnlineProvider);
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if (!isOnline) {
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return;
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}
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// If network latency is high, delay warmup further to reduce contention
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final latency = connectivity.lastLatencyMs;
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final extraDelay = latency > 800
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? 400
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: latency > 400
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? 200
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: 0;
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final statusController = ref.read(_conversationWarmupStatusProvider.notifier);
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final status = ref.read(_conversationWarmupStatusProvider);
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if (!force) {
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if (status == _ConversationWarmupStatus.warming ||
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status == _ConversationWarmupStatus.complete) {
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return;
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}
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} else if (status == _ConversationWarmupStatus.warming) {
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return;
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}
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final now = DateTime.now();
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final lastAttempt = ref.read(_conversationWarmupLastAttemptProvider);
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if (!force &&
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lastAttempt != null &&
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now.difference(lastAttempt) < const Duration(seconds: 30)) {
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return;
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}
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ref.read(_conversationWarmupLastAttemptProvider.notifier).set(now);
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statusController.set(_ConversationWarmupStatus.warming);
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Future.microtask(() async {
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if (extraDelay > 0) {
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await Future.delayed(Duration(milliseconds: extraDelay));
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}
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try {
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if (!ref.read(connectivityServiceProvider).isAppForeground) {
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statusController.set(_ConversationWarmupStatus.idle);
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return;
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}
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final existing = ref.read(conversationsProvider);
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if (existing.hasValue) {
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statusController.set(_ConversationWarmupStatus.complete);
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return;
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}
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if (existing.hasError) {
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refreshConversationsCache(ref);
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}
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final conversations = await ref.read(conversationsProvider.future);
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statusController.set(_ConversationWarmupStatus.complete);
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DebugLogger.info(
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'Background chats warmup fetched ${conversations.length} conversations',
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);
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} catch (error) {
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DebugLogger.warning('Background chats warmup failed: $error');
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statusController.set(_ConversationWarmupStatus.idle);
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}
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});
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}
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/// App-level startup/background task flow orchestrator.
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///
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/// Moves background initialization out of widgets and into a Riverpod controller,
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/// keeping UI lean and business logic centralized while avoiding side effects
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/// during provider build.
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@Riverpod(keepAlive: true)
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class AppStartupFlow extends _$AppStartupFlow {
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bool _started = false;
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ProviderSubscription<SocketService?>? _socketSubscription;
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@override
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FutureOr<void> build() {}
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void start() {
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if (_started) return;
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_started = true;
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state = const AsyncValue<void>.data(null);
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SchedulerBinding.instance.addPostFrameCallback((_) {
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if (!ref.mounted) return;
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_activate();
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});
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}
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void _activate() {
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final ref = this.ref;
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ref.onDispose(() {
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_socketSubscription?.close();
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_socketSubscription = null;
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});
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void keepAlive<T>(ProviderListenable<T> provider) {
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ref.listen<T>(provider, (previous, value) {});
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}
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// Ensure token integration listeners are active
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keepAlive(authApiIntegrationProvider);
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keepAlive(apiTokenUpdaterProvider);
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keepAlive(silentLoginCoordinatorProvider);
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keepAlive(appIntentCoordinatorProvider);
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// Kick background model loading flow (non-blocking)
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Future<void>.delayed(const Duration(milliseconds: 120), () {
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if (!ref.mounted) return;
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ref.read(backgroundModelLoadProvider);
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});
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// If authenticated, keep socket service alive and connected
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final navState = ref.read(authNavigationStateProvider);
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if (navState == AuthNavigationState.authenticated) {
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_ensureSocketAttached();
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}
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// Ensure resume-triggered foreground refresh is active
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Future<void>.delayed(const Duration(milliseconds: 48), () {
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if (!ref.mounted) return;
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keepAlive(foregroundRefreshProvider);
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});
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// Keep Socket.IO connection alive in background within platform limits
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Future<void>.delayed(const Duration(milliseconds: 96), () {
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if (!ref.mounted) return;
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keepAlive(socketPersistenceProvider);
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});
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// Ensure persistent streaming uses the shared connectivity service
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final connectivityService = ref.read(connectivityServiceProvider);
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Future<void>.delayed(const Duration(milliseconds: 160), () {
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if (!ref.mounted) return;
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PersistentStreamingService().attachConnectivityService(
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connectivityService,
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);
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});
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// Warm the conversations list in the background as soon as possible,
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// but avoid doing so on poor connectivity to reduce startup load.
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// Apply a small randomized delay to smooth load spikes across app wakes.
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Future.microtask(() async {
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final online = ref.read(isOnlineProvider);
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if (!online) return;
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// Slightly increase jitter to reduce contention on startup
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final jitter = Duration(
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milliseconds: 150 + (DateTime.now().millisecond % 200),
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);
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// Defer until after first frame to keep first paint smooth
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WidgetsBinding.instance.addPostFrameCallback((_) async {
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await Future.delayed(jitter);
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_scheduleConversationWarmup(ref);
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});
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});
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// One-time, post-frame system UI polish: set status bar icon brightness to
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// match theme after the first frame. Avoids flicker at startup.
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WidgetsBinding.instance.addPostFrameCallback((_) {
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try {
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final context = NavigationService.context;
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final view = context != null ? View.maybeOf(context) : null;
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final dispatcher = WidgetsBinding.instance.platformDispatcher;
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final platformBrightness =
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view?.platformDispatcher.platformBrightness ??
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dispatcher.platformBrightness;
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final isDark = platformBrightness == Brightness.dark;
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SystemChrome.setSystemUIOverlayStyle(
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SystemUiOverlayStyle(
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statusBarIconBrightness: isDark
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? Brightness.light
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: Brightness.dark,
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systemNavigationBarIconBrightness: isDark
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? Brightness.light
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: Brightness.dark,
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),
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);
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} catch (_) {}
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});
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// Watch for auth transitions to trigger warmup and other background work
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ref.listen<AuthNavigationState>(authNavigationStateProvider, (prev, next) {
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if (next == AuthNavigationState.authenticated) {
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// Schedule microtask so we don't perform side-effects inside build
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Future.microtask(() async {
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try {
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final api = ref.read(apiServiceProvider);
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if (api == null) {
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DebugLogger.warning('API service not available for startup flow');
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return;
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}
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_ensureSocketAttached();
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// Ensure API has the latest token immediately
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final authToken = ref.read(authTokenProvider3);
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if (authToken != null && authToken.isNotEmpty) {
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api.updateAuthToken(authToken);
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DebugLogger.auth('StartupFlow: Applied auth token to API');
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}
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// Preload default model in background (best-effort) with an adaptive
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// delay based on network latency to avoid hammering poor networks.
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final latency = ref.read(connectivityServiceProvider).lastLatencyMs;
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final delayMs = latency < 0
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? 300
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: latency > 800
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? 600
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: 200 + (latency ~/ 2);
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Future.delayed(Duration(milliseconds: delayMs), () async {
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try {
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await ref.read(defaultModelProvider.future);
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} catch (e) {
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DebugLogger.warning(
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'model-preload-failed',
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scope: 'startup',
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data: {'error': e},
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);
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}
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});
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// Kick background chat warmup now that we're authenticated
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_scheduleConversationWarmup(ref, force: true);
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// Show onboarding once when user reaches chat and hasn't seen it yet
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await _maybeShowOnboarding(ref);
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} catch (e) {
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DebugLogger.error(
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'startup-flow-failed',
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scope: 'startup',
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error: e,
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);
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}
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});
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} else {
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// Reset warmup state when leaving authenticated flow
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ref
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.read(_conversationWarmupStatusProvider.notifier)
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.set(_ConversationWarmupStatus.idle);
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}
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});
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// Retry warmup when connectivity is restored
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ref.listen<bool>(isOnlineProvider, (prev, next) {
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if (next == true) {
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_scheduleConversationWarmup(ref);
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}
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});
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// When conversations reload (e.g., manual refresh), ensure warmup runs again
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ref.listen<AsyncValue<List<Conversation>>>(conversationsProvider, (
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previous,
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next,
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) {
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final wasReady = previous?.hasValue == true || previous?.hasError == true;
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if (wasReady && next.isLoading) {
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ref
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.read(_conversationWarmupStatusProvider.notifier)
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.set(_ConversationWarmupStatus.idle);
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Future.microtask(() => _scheduleConversationWarmup(ref, force: true));
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}
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});
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}
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void _ensureSocketAttached() {
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_socketSubscription ??= ref.listen<SocketService?>(
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socketServiceProvider,
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(previous, value) {},
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);
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}
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}
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// Tracks whether we've already attempted a silent login for the current app session.
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final _silentLoginAttemptedProvider =
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NotifierProvider<_SilentLoginAttemptedNotifier, bool>(
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_SilentLoginAttemptedNotifier.new,
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);
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class _SilentLoginAttemptedNotifier extends Notifier<bool> {
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@override
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bool build() => false;
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void markAttempted() => state = true;
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}
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/// Coordinates a one-time silent login attempt when:
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/// - There is an active server
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/// - The auth navigation state requires login
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/// - Saved credentials are present
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final silentLoginCoordinatorProvider = Provider<void>((ref) {
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Future<void> attempt() async {
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final attempted = ref.read(_silentLoginAttemptedProvider);
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if (attempted) return;
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final authState = ref.read(authNavigationStateProvider);
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if (authState != AuthNavigationState.needsLogin) return;
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final activeServerAsync = ref.read(activeServerProvider);
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final hasActiveServer = activeServerAsync.maybeWhen(
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data: (server) => server != null,
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orElse: () => false,
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);
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if (!hasActiveServer) return;
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// Perform the attempt in a microtask to avoid side-effects in build
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Future.microtask(() async {
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try {
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final hasCreds = await ref.read(hasSavedCredentialsProvider2.future);
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if (hasCreds) {
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ref.read(_silentLoginAttemptedProvider.notifier).markAttempted();
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await ref.read(authActionsProvider).silentLogin();
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}
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} catch (_) {
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// Ignore silent login errors; app will proceed to manual login
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}
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});
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}
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void check() => attempt();
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// Initial check
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check();
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// React to changes in server or auth state
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ref.listen<AuthNavigationState>(authNavigationStateProvider, (prev, next) {
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check();
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});
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ref.listen<AsyncValue<ServerConfig?>>(activeServerProvider, (prev, next) {
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check();
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});
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});
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/// Listens to app lifecycle and refreshes server state when app returns to foreground.
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///
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/// Rationale: Socket.IO does not replay historical events. If the app was suspended,
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/// we may miss updates. On resume, invalidate conversations to reconcile state.
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final foregroundRefreshProvider = Provider<void>((ref) {
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final observer = _ForegroundRefreshObserver(ref);
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WidgetsBinding.instance.addObserver(observer);
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ref.onDispose(() => WidgetsBinding.instance.removeObserver(observer));
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});
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class _ForegroundRefreshObserver extends WidgetsBindingObserver {
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final Ref _ref;
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_ForegroundRefreshObserver(this._ref);
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@override
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void didChangeAppLifecycleState(AppLifecycleState state) {
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if (state == AppLifecycleState.resumed) {
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// Schedule to avoid side-effects during build frames
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Future.microtask(() {
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try {
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refreshConversationsCache(_ref);
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_ref
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.read(_conversationWarmupStatusProvider.notifier)
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.set(_ConversationWarmupStatus.idle);
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} catch (_) {}
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_scheduleConversationWarmup(_ref, force: true);
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});
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}
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}
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}
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/// Attempts to keep the realtime socket connection alive while the app is
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/// backgrounded, similar to how PersistentStreamingService works for streams.
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///
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/// Notes:
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/// - iOS: limited to short background task windows; we send periodic keepAlive.
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/// - Android: uses existing foreground service notification.
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final socketPersistenceProvider = Provider<void>((ref) {
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final observer = _SocketPersistenceObserver(ref);
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WidgetsBinding.instance.addObserver(observer);
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// React to active conversation changes while backgrounded
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final sub = ref.listen<Conversation?>(
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activeConversationProvider,
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(prev, next) => observer.onActiveConversationChanged(),
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);
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ref.onDispose(() => WidgetsBinding.instance.removeObserver(observer));
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ref.onDispose(sub.close);
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});
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class _SocketPersistenceObserver extends WidgetsBindingObserver {
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final Ref _ref;
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_SocketPersistenceObserver(this._ref);
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static const String _socketId = 'socket-keepalive';
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Timer? _heartbeat;
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bool _bgActive = false;
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bool _isBackgrounded = false;
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bool _shouldKeepAlive() {
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final authed =
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_ref.read(authNavigationStateProvider) ==
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AuthNavigationState.authenticated;
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final hasConversation = _ref.read(activeConversationProvider) != null;
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return authed && hasConversation;
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}
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void _startBackground() {
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if (_bgActive) return;
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if (!_shouldKeepAlive()) return;
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try {
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BackgroundStreamingHandler.instance.startBackgroundExecution([_socketId]);
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// Periodic keep-alive (primarily useful on iOS)
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_heartbeat?.cancel();
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_heartbeat = Timer.periodic(const Duration(seconds: 30), (_) async {
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try {
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await BackgroundStreamingHandler.instance.keepAlive();
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} catch (_) {}
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});
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_bgActive = true;
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} catch (_) {}
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}
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void _stopBackground() {
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if (!_bgActive) return;
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try {
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BackgroundStreamingHandler.instance.stopBackgroundExecution([_socketId]);
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} catch (_) {}
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_heartbeat?.cancel();
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_heartbeat = null;
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_bgActive = false;
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}
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@override
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void didChangeAppLifecycleState(AppLifecycleState state) {
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switch (state) {
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case AppLifecycleState.paused:
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case AppLifecycleState.inactive:
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_isBackgrounded = true;
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_startBackground();
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break;
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case AppLifecycleState.resumed:
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_isBackgrounded = false;
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_stopBackground();
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break;
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case AppLifecycleState.detached:
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case AppLifecycleState.hidden:
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_isBackgrounded = false;
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_stopBackground();
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break;
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}
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}
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// Called when active conversation changes; only acts during background
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void onActiveConversationChanged() {
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if (!_isBackgrounded) return;
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if (_shouldKeepAlive()) {
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_startBackground();
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} else {
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_stopBackground();
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}
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}
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}
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Future<void> _maybeShowOnboarding(Ref ref) async {
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try {
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final storage = ref.read(optimizedStorageServiceProvider);
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final seen = await storage.getOnboardingSeen();
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if (seen) return;
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// Small delay to allow initial navigation/frame to settle
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await Future.delayed(const Duration(milliseconds: 300));
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// Only surface onboarding on the chat route to avoid interrupting flows
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if (NavigationService.currentRoute != Routes.chat) return;
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WidgetsBinding.instance.addPostFrameCallback((_) async {
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final navContext = NavigationService.navigatorKey.currentContext;
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if (navContext == null) return;
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try {
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ref.read(composerAutofocusEnabledProvider.notifier).set(false);
|
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} catch (_) {}
|
|
try {
|
|
FocusManager.instance.primaryFocus?.unfocus();
|
|
SystemChannels.textInput.invokeMethod('TextInput.hide');
|
|
} catch (_) {}
|
|
|
|
// Show onboarding sheet
|
|
final sheetFuture = showModalBottomSheet(
|
|
context: navContext,
|
|
backgroundColor: Colors.transparent,
|
|
isScrollControlled: true,
|
|
builder: (context) => Container(
|
|
decoration: BoxDecoration(
|
|
color: context.conduitTheme.surfaceBackground,
|
|
borderRadius: const BorderRadius.vertical(
|
|
top: Radius.circular(AppBorderRadius.modal),
|
|
),
|
|
boxShadow: ConduitShadows.modal(context),
|
|
),
|
|
child: const OnboardingSheet(),
|
|
),
|
|
);
|
|
sheetFuture.whenComplete(() {
|
|
try {
|
|
ref.read(composerAutofocusEnabledProvider.notifier).set(true);
|
|
} catch (_) {}
|
|
});
|
|
|
|
await storage.setOnboardingSeen(true);
|
|
});
|
|
} catch (e) {
|
|
// Best-effort only; never fail app startup due to onboarding
|
|
DebugLogger.warning('StartupFlow: onboarding display failed: $e');
|
|
}
|
|
}
|