625 lines
24 KiB
Dart
625 lines
24 KiB
Dart
import 'package:flutter/material.dart';
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import 'package:flutter/foundation.dart';
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import 'package:flutter_riverpod/flutter_riverpod.dart';
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import '../../models/cluster.dart';
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import '../../services/api_service.dart';
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import '../../services/capsule_security_service.dart';
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import '../../theme/tokens.dart';
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import '../../theme/app_theme.dart';
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import 'group_screen.dart';
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/// ClustersScreen — Discovery and listing of all clusters the user belongs to.
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/// Split into two sections: Public Clusters (geo) and Private Capsules (E2EE).
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class ClustersScreen extends ConsumerStatefulWidget {
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const ClustersScreen({super.key});
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@override
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ConsumerState<ClustersScreen> createState() => _ClustersScreenState();
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}
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class _ClustersScreenState extends ConsumerState<ClustersScreen>
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with SingleTickerProviderStateMixin {
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late TabController _tabController;
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bool _isLoading = true;
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List<Cluster> _publicClusters = [];
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List<Cluster> _privateCapsules = [];
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Map<String, String> _encryptedKeys = {};
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@override
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void initState() {
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super.initState();
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_tabController = TabController(length: 2, vsync: this);
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_loadClusters();
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}
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@override
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void dispose() {
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_tabController.dispose();
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super.dispose();
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}
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Future<void> _loadClusters() async {
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setState(() => _isLoading = true);
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try {
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final groups = await ApiService.instance.fetchMyGroups();
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final allClusters = groups.map((g) => Cluster.fromJson(g)).toList();
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if (mounted) {
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setState(() {
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_publicClusters = allClusters.where((c) => !c.isCapsule).toList();
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_privateCapsules = allClusters.where((c) => c.isCapsule).toList();
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// Store encrypted keys for quick access when navigating
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_encryptedKeys = {
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for (final g in groups)
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if ((g['encrypted_group_key'] as String?)?.isNotEmpty == true)
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g['id'] as String: g['encrypted_group_key'] as String,
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};
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_isLoading = false;
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});
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}
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} catch (e) {
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if (kDebugMode) print('[Clusters] Load error: $e');
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if (mounted) setState(() => _isLoading = false);
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}
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}
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void _navigateToCluster(Cluster cluster) {
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Navigator.of(context).push(MaterialPageRoute(
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builder: (_) => GroupScreen(
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group: cluster,
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encryptedGroupKey: _encryptedKeys[cluster.id],
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),
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));
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}
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@override
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Widget build(BuildContext context) {
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return Scaffold(
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backgroundColor: AppTheme.scaffoldBg,
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appBar: AppBar(
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title: const Text('Groups', style: TextStyle(fontWeight: FontWeight.w800)),
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backgroundColor: AppTheme.scaffoldBg,
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surfaceTintColor: SojornColors.transparent,
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bottom: TabBar(
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controller: _tabController,
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indicatorColor: AppTheme.navyBlue,
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labelColor: AppTheme.navyBlue,
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unselectedLabelColor: SojornColors.textDisabled,
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tabs: const [
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Tab(text: 'Groups'),
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Tab(text: 'Encrypted'),
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],
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),
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actions: [
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IconButton(
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icon: const Icon(Icons.add),
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onPressed: () => _showCreateSheet(context),
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tooltip: 'Create Group',
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),
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],
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),
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body: TabBarView(
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controller: _tabController,
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children: [
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_buildPublicTab(),
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_buildCapsuleTab(),
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],
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),
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);
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}
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Widget _buildPublicTab() {
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if (_isLoading) return const Center(child: CircularProgressIndicator());
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if (_publicClusters.isEmpty) return _EmptyState(
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icon: Icons.location_on,
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title: 'No Neighborhoods Yet',
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subtitle: 'Public clusters based on your location will appear here.',
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actionLabel: 'Discover Nearby',
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onAction: _loadClusters,
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);
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return RefreshIndicator(
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onRefresh: _loadClusters,
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child: ListView.builder(
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padding: const EdgeInsets.all(12),
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itemCount: _publicClusters.length,
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itemBuilder: (_, i) => _PublicClusterCard(
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cluster: _publicClusters[i],
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onTap: () => _navigateToCluster(_publicClusters[i]),
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),
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),
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);
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}
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Widget _buildCapsuleTab() {
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if (_isLoading) return const Center(child: CircularProgressIndicator());
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if (_privateCapsules.isEmpty) return _EmptyState(
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icon: Icons.lock,
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title: 'No Capsules Yet',
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subtitle: 'Create an encrypted capsule or join one via invite code.',
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actionLabel: 'Create Capsule',
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onAction: () => _showCreateSheet(context, capsule: true),
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);
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return RefreshIndicator(
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onRefresh: _loadClusters,
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child: ListView.builder(
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padding: const EdgeInsets.all(12),
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itemCount: _privateCapsules.length,
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itemBuilder: (_, i) => _CapsuleCard(
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capsule: _privateCapsules[i],
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onTap: () => _navigateToCluster(_privateCapsules[i]),
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),
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),
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);
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}
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void _showCreateSheet(BuildContext context, {bool capsule = false}) {
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showModalBottomSheet(
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context: context,
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backgroundColor: AppTheme.cardSurface,
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isScrollControlled: true,
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builder: (ctx) => capsule
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? _CreateCapsuleForm(onCreated: () { Navigator.pop(ctx); _loadClusters(); })
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: _CreateGroupForm(onCreated: () { Navigator.pop(ctx); _loadClusters(); }),
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);
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}
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}
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// ── Empty State ───────────────────────────────────────────────────────────
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class _EmptyState extends StatelessWidget {
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final IconData icon;
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final String title;
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final String subtitle;
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final String actionLabel;
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final VoidCallback onAction;
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const _EmptyState({
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required this.icon,
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required this.title,
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required this.subtitle,
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required this.actionLabel,
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required this.onAction,
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});
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@override
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Widget build(BuildContext context) {
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return Center(
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child: Padding(
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padding: const EdgeInsets.all(32),
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child: Column(
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mainAxisSize: MainAxisSize.min,
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children: [
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Icon(icon, size: 56, color: AppTheme.navyBlue.withValues(alpha: 0.2)),
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const SizedBox(height: 16),
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Text(title, style: TextStyle(
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fontSize: 18, fontWeight: FontWeight.w700,
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color: AppTheme.navyBlue.withValues(alpha: 0.6),
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)),
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const SizedBox(height: 8),
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Text(subtitle, style: TextStyle(
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fontSize: 13, color: AppTheme.navyBlue.withValues(alpha: 0.4),
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), textAlign: TextAlign.center),
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const SizedBox(height: 24),
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OutlinedButton(
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onPressed: onAction,
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style: OutlinedButton.styleFrom(
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side: BorderSide(color: AppTheme.navyBlue.withValues(alpha: 0.3)),
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),
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child: Text(actionLabel),
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),
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],
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),
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),
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);
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}
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}
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// ── Public Cluster Card ───────────────────────────────────────────────────
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class _PublicClusterCard extends StatelessWidget {
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final Cluster cluster;
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final VoidCallback onTap;
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const _PublicClusterCard({required this.cluster, required this.onTap});
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@override
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Widget build(BuildContext context) {
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return GestureDetector(
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onTap: onTap,
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child: Container(
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margin: const EdgeInsets.only(bottom: 10),
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padding: const EdgeInsets.all(16),
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decoration: BoxDecoration(
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color: AppTheme.cardSurface,
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borderRadius: BorderRadius.circular(16),
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border: Border.all(color: AppTheme.navyBlue.withValues(alpha: 0.1)),
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boxShadow: [
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BoxShadow(
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color: AppTheme.brightNavy.withValues(alpha: 0.06),
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blurRadius: 12,
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offset: const Offset(0, 4),
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),
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],
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),
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child: Row(
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children: [
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// Avatar / location icon
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Container(
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width: 48, height: 48,
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decoration: BoxDecoration(
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color: AppTheme.brightNavy.withValues(alpha: 0.08),
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borderRadius: BorderRadius.circular(14),
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),
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child: Icon(Icons.location_on, color: AppTheme.brightNavy, size: 24),
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),
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const SizedBox(width: 14),
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Expanded(
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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Text(cluster.name, style: const TextStyle(
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fontSize: 15, fontWeight: FontWeight.w600,
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)),
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const SizedBox(height: 3),
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Row(
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children: [
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Icon(Icons.public, size: 12, color: SojornColors.textDisabled),
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const SizedBox(width: 4),
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Text('Public', style: TextStyle(fontSize: 11, color: SojornColors.textDisabled)),
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const SizedBox(width: 10),
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Icon(Icons.people, size: 12, color: SojornColors.textDisabled),
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const SizedBox(width: 4),
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Text('${cluster.memberCount}', style: TextStyle(fontSize: 11, color: SojornColors.textDisabled)),
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],
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),
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],
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),
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),
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Icon(Icons.chevron_right, color: SojornColors.textDisabled, size: 20),
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],
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),
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),
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);
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}
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}
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// ── Private Capsule Card ──────────────────────────────────────────────────
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class _CapsuleCard extends StatelessWidget {
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final Cluster capsule;
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final VoidCallback onTap;
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const _CapsuleCard({required this.capsule, required this.onTap});
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@override
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Widget build(BuildContext context) {
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return GestureDetector(
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onTap: onTap,
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child: Container(
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margin: const EdgeInsets.only(bottom: 10),
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padding: const EdgeInsets.all(16),
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decoration: BoxDecoration(
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color: const Color(0xFFF0F8F0),
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borderRadius: BorderRadius.circular(16),
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border: Border.all(color: const Color(0xFF4CAF50).withValues(alpha: 0.18)),
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boxShadow: [
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BoxShadow(
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color: const Color(0xFF4CAF50).withValues(alpha: 0.06),
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blurRadius: 12,
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offset: const Offset(0, 4),
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),
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],
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),
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child: Row(
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children: [
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// Lock avatar
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Container(
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width: 48, height: 48,
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decoration: BoxDecoration(
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color: const Color(0xFF4CAF50).withValues(alpha: 0.1),
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borderRadius: BorderRadius.circular(14),
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),
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child: const Icon(Icons.lock, color: Color(0xFF4CAF50), size: 22),
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),
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const SizedBox(width: 14),
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Expanded(
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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Text(capsule.name, style: TextStyle(
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fontSize: 15, fontWeight: FontWeight.w600, color: AppTheme.navyBlue,
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)),
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const SizedBox(height: 3),
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Row(
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children: [
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const Icon(Icons.shield, size: 12, color: Color(0xFF4CAF50)),
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const SizedBox(width: 4),
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Text('E2E Encrypted', style: TextStyle(fontSize: 11, color: const Color(0xFF4CAF50).withValues(alpha: 0.7))),
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const SizedBox(width: 10),
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Icon(Icons.people, size: 12, color: SojornColors.textDisabled),
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const SizedBox(width: 4),
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Text('${capsule.memberCount}', style: TextStyle(fontSize: 11, color: SojornColors.postContentLight)),
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const SizedBox(width: 10),
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Icon(Icons.vpn_key, size: 11, color: SojornColors.textDisabled),
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const SizedBox(width: 3),
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Text('v${capsule.keyVersion}', style: TextStyle(fontSize: 10, color: SojornColors.textDisabled)),
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],
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),
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],
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),
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),
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Icon(Icons.chevron_right, color: SojornColors.textDisabled, size: 20),
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],
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),
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),
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);
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}
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}
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// ── Create Group Form (non-encrypted, public/private) ─────────────────
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class _CreateGroupForm extends StatefulWidget {
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final VoidCallback onCreated;
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const _CreateGroupForm({required this.onCreated});
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@override
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State<_CreateGroupForm> createState() => _CreateGroupFormState();
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}
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class _CreateGroupFormState extends State<_CreateGroupForm> {
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final _nameCtrl = TextEditingController();
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final _descCtrl = TextEditingController();
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String _privacy = 'public';
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bool _submitting = false;
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@override
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void dispose() { _nameCtrl.dispose(); _descCtrl.dispose(); super.dispose(); }
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Future<void> _submit() async {
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if (_nameCtrl.text.trim().isEmpty) return;
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setState(() => _submitting = true);
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try {
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await ApiService.instance.createGroup(
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name: _nameCtrl.text.trim(),
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description: _descCtrl.text.trim(),
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privacy: _privacy,
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);
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widget.onCreated();
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} catch (e) {
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if (mounted) {
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ScaffoldMessenger.of(context).showSnackBar(
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SnackBar(content: Text('Failed to create group: $e')),
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);
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}
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}
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if (mounted) setState(() => _submitting = false);
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}
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@override
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Widget build(BuildContext context) {
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return Padding(
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padding: EdgeInsets.fromLTRB(20, 16, 20, MediaQuery.of(context).viewInsets.bottom + 20),
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child: Column(
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mainAxisSize: MainAxisSize.min,
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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Center(child: Container(width: 40, height: 4, decoration: BoxDecoration(color: SojornColors.basicBlack.withValues(alpha: 0.15), borderRadius: BorderRadius.circular(2)))),
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const SizedBox(height: 20),
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const Text('Create Group', style: TextStyle(fontSize: 18, fontWeight: FontWeight.w700)),
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const SizedBox(height: 4),
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Text('Anyone can create a group. Automatic geo-groups are official.',
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style: TextStyle(fontSize: 12, color: SojornColors.basicBlack.withValues(alpha: 0.45))),
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const SizedBox(height: 20),
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TextField(
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controller: _nameCtrl,
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decoration: InputDecoration(
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labelText: 'Group name',
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filled: true,
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fillColor: SojornColors.basicBlack.withValues(alpha: 0.04),
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border: OutlineInputBorder(borderRadius: BorderRadius.circular(10), borderSide: BorderSide(color: SojornColors.basicBlack.withValues(alpha: 0.1))),
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enabledBorder: OutlineInputBorder(borderRadius: BorderRadius.circular(10), borderSide: BorderSide(color: SojornColors.basicBlack.withValues(alpha: 0.1))),
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),
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),
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const SizedBox(height: 12),
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TextField(
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controller: _descCtrl,
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maxLines: 2,
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decoration: InputDecoration(
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labelText: 'Description (optional)',
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filled: true,
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fillColor: SojornColors.basicBlack.withValues(alpha: 0.04),
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border: OutlineInputBorder(borderRadius: BorderRadius.circular(10), borderSide: BorderSide(color: SojornColors.basicBlack.withValues(alpha: 0.1))),
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enabledBorder: OutlineInputBorder(borderRadius: BorderRadius.circular(10), borderSide: BorderSide(color: SojornColors.basicBlack.withValues(alpha: 0.1))),
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),
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),
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const SizedBox(height: 14),
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Row(
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children: [
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Text('Visibility:', style: TextStyle(fontSize: 13, color: SojornColors.basicBlack.withValues(alpha: 0.6))),
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const SizedBox(width: 12),
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ChoiceChip(
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label: const Text('Public'),
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selected: _privacy == 'public',
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onSelected: (_) => setState(() => _privacy = 'public'),
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selectedColor: AppTheme.brightNavy.withValues(alpha: 0.15),
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),
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const SizedBox(width: 8),
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ChoiceChip(
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label: const Text('Private'),
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selected: _privacy == 'private',
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onSelected: (_) => setState(() => _privacy = 'private'),
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selectedColor: AppTheme.brightNavy.withValues(alpha: 0.15),
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),
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],
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),
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const SizedBox(height: 20),
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SizedBox(
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width: double.infinity, height: 48,
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child: ElevatedButton(
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onPressed: _submitting ? null : _submit,
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style: ElevatedButton.styleFrom(
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backgroundColor: AppTheme.navyBlue,
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foregroundColor: SojornColors.basicWhite,
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shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(12)),
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),
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child: _submitting
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? const SizedBox(width: 20, height: 20, child: CircularProgressIndicator(strokeWidth: 2, color: SojornColors.basicWhite))
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: const Text('Create Group', style: TextStyle(fontWeight: FontWeight.bold, fontSize: 15)),
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),
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),
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],
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),
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);
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}
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}
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// ── Create Capsule Form (E2EE, generates keys automatically) ──────────
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class _CreateCapsuleForm extends StatefulWidget {
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final VoidCallback onCreated;
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const _CreateCapsuleForm({required this.onCreated});
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@override
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State<_CreateCapsuleForm> createState() => _CreateCapsuleFormState();
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}
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class _CreateCapsuleFormState extends State<_CreateCapsuleForm> {
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final _nameCtrl = TextEditingController();
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final _descCtrl = TextEditingController();
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bool _submitting = false;
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String? _statusMsg;
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@override
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void dispose() { _nameCtrl.dispose(); _descCtrl.dispose(); super.dispose(); }
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Future<void> _submit() async {
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if (_nameCtrl.text.trim().isEmpty) return;
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setState(() { _submitting = true; _statusMsg = 'Generating encryption keys…'; });
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try {
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// 1. Generate capsule AES key
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final capsuleKey = await CapsuleSecurityService.generateCapsuleKey();
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// 2. Get (or create) user's X25519 key pair
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final publicKeyB64 = await CapsuleSecurityService.getUserPublicKeyB64();
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setState(() => _statusMsg = 'Encrypting group key…');
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// 3. Encrypt capsule key for the creator (box it to themselves)
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final encryptedGroupKey = await CapsuleSecurityService.encryptCapsuleKeyForUser(
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capsuleKey: capsuleKey,
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recipientPublicKeyB64: publicKeyB64,
|
|
);
|
|
|
|
setState(() => _statusMsg = 'Creating capsule…');
|
|
|
|
// 4. POST to backend
|
|
final result = await ApiService.instance.createCapsule(
|
|
name: _nameCtrl.text.trim(),
|
|
description: _descCtrl.text.trim(),
|
|
publicKey: publicKeyB64,
|
|
encryptedGroupKey: encryptedGroupKey,
|
|
);
|
|
|
|
// 5. Cache the capsule key locally for instant access
|
|
final capsuleId = (result['capsule'] as Map<String, dynamic>?)?['id']?.toString();
|
|
if (capsuleId != null) {
|
|
await CapsuleSecurityService.cacheCapsuleKey(capsuleId, capsuleKey);
|
|
}
|
|
|
|
widget.onCreated();
|
|
} catch (e) {
|
|
if (mounted) {
|
|
ScaffoldMessenger.of(context).showSnackBar(
|
|
SnackBar(content: Text('Failed to create capsule: $e')),
|
|
);
|
|
}
|
|
}
|
|
if (mounted) setState(() { _submitting = false; _statusMsg = null; });
|
|
}
|
|
|
|
@override
|
|
Widget build(BuildContext context) {
|
|
return Padding(
|
|
padding: EdgeInsets.fromLTRB(20, 16, 20, MediaQuery.of(context).viewInsets.bottom + 20),
|
|
child: Column(
|
|
mainAxisSize: MainAxisSize.min,
|
|
crossAxisAlignment: CrossAxisAlignment.start,
|
|
children: [
|
|
Center(child: Container(width: 40, height: 4, decoration: BoxDecoration(color: AppTheme.navyBlue.withValues(alpha: 0.15), borderRadius: BorderRadius.circular(2)))),
|
|
const SizedBox(height: 20),
|
|
Row(
|
|
children: [
|
|
const Icon(Icons.lock, color: Color(0xFF4CAF50), size: 20),
|
|
const SizedBox(width: 8),
|
|
Text('Create Private Capsule', style: TextStyle(color: AppTheme.navyBlue, fontSize: 18, fontWeight: FontWeight.w700)),
|
|
],
|
|
),
|
|
const SizedBox(height: 4),
|
|
Text('End-to-end encrypted. The server never sees your content.',
|
|
style: TextStyle(fontSize: 12, color: SojornColors.textDisabled)),
|
|
const SizedBox(height: 20),
|
|
TextField(
|
|
controller: _nameCtrl,
|
|
style: TextStyle(color: SojornColors.postContent),
|
|
decoration: InputDecoration(
|
|
labelText: 'Capsule name',
|
|
labelStyle: TextStyle(color: SojornColors.textDisabled),
|
|
filled: true,
|
|
fillColor: AppTheme.scaffoldBg,
|
|
border: OutlineInputBorder(borderRadius: BorderRadius.circular(10), borderSide: BorderSide.none),
|
|
),
|
|
),
|
|
const SizedBox(height: 12),
|
|
TextField(
|
|
controller: _descCtrl,
|
|
style: TextStyle(color: SojornColors.postContent),
|
|
maxLines: 2,
|
|
decoration: InputDecoration(
|
|
labelText: 'Description (optional)',
|
|
labelStyle: TextStyle(color: SojornColors.textDisabled),
|
|
filled: true,
|
|
fillColor: AppTheme.scaffoldBg,
|
|
border: OutlineInputBorder(borderRadius: BorderRadius.circular(10), borderSide: BorderSide.none),
|
|
),
|
|
),
|
|
const SizedBox(height: 8),
|
|
Container(
|
|
padding: const EdgeInsets.all(10),
|
|
decoration: BoxDecoration(
|
|
color: const Color(0xFF4CAF50).withValues(alpha: 0.08),
|
|
borderRadius: BorderRadius.circular(8),
|
|
border: Border.all(color: const Color(0xFF4CAF50).withValues(alpha: 0.15)),
|
|
),
|
|
child: Row(
|
|
children: [
|
|
Icon(Icons.shield, size: 14, color: const Color(0xFF4CAF50).withValues(alpha: 0.7)),
|
|
const SizedBox(width: 8),
|
|
Expanded(child: Text(
|
|
'Keys are generated on your device. Only invited members can decrypt content.',
|
|
style: TextStyle(fontSize: 11, color: SojornColors.postContentLight),
|
|
)),
|
|
],
|
|
),
|
|
),
|
|
const SizedBox(height: 20),
|
|
SizedBox(
|
|
width: double.infinity, height: 48,
|
|
child: ElevatedButton(
|
|
onPressed: _submitting ? null : _submit,
|
|
style: ElevatedButton.styleFrom(
|
|
backgroundColor: const Color(0xFF4CAF50),
|
|
foregroundColor: SojornColors.basicWhite,
|
|
disabledBackgroundColor: const Color(0xFF4CAF50).withValues(alpha: 0.3),
|
|
shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(12)),
|
|
),
|
|
child: _submitting
|
|
? Row(mainAxisAlignment: MainAxisAlignment.center, children: [
|
|
const SizedBox(width: 16, height: 16, child: CircularProgressIndicator(strokeWidth: 2, color: SojornColors.basicWhite)),
|
|
const SizedBox(width: 10),
|
|
Text(_statusMsg ?? 'Creating…', style: const TextStyle(fontSize: 13)),
|
|
])
|
|
: const Row(mainAxisAlignment: MainAxisAlignment.center, children: [
|
|
Icon(Icons.lock, size: 16),
|
|
SizedBox(width: 8),
|
|
Text('Generate Keys & Create', style: TextStyle(fontWeight: FontWeight.bold, fontSize: 15)),
|
|
]),
|
|
),
|
|
),
|
|
],
|
|
),
|
|
);
|
|
}
|
|
}
|