349 lines
12 KiB
Dart
349 lines
12 KiB
Dart
import 'package:flutter/material.dart';
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import 'package:flutter_riverpod/flutter_riverpod.dart';
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import 'package:cryptography/cryptography.dart';
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import '../../models/cluster.dart';
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import '../../services/api_service.dart';
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import '../../services/auth_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_feed_tab.dart';
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import 'group_chat_tab.dart';
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import 'group_forum_tab.dart';
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import 'group_members_tab.dart';
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/// Shared GroupScreen for both public groups and private capsules.
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/// For encrypted capsules, all content is encrypted/decrypted client-side.
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class GroupScreen extends ConsumerStatefulWidget {
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final Cluster group;
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final String? encryptedGroupKey;
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const GroupScreen({
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super.key,
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required this.group,
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this.encryptedGroupKey,
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});
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@override
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ConsumerState<GroupScreen> createState() => _GroupScreenState();
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}
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class _GroupScreenState extends ConsumerState<GroupScreen>
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with SingleTickerProviderStateMixin {
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late TabController _tabController;
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SecretKey? _capsuleKey;
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bool _isUnlocking = false;
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String? _unlockError;
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String? _currentUserId;
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bool get isEncrypted => widget.group.isEncrypted;
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@override
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void initState() {
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super.initState();
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_tabController = TabController(length: 4, vsync: this);
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_currentUserId = AuthService.instance.currentUser?.id;
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if (isEncrypted) {
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_unlockCapsule();
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}
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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> _unlockCapsule() async {
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setState(() { _isUnlocking = true; _unlockError = null; });
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try {
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var key = await CapsuleSecurityService.getCachedCapsuleKey(widget.group.id);
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if (key == null && widget.encryptedGroupKey != null) {
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key = await CapsuleSecurityService.decryptCapsuleKey(
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encryptedGroupKeyJson: widget.encryptedGroupKey!,
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);
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await CapsuleSecurityService.cacheCapsuleKey(widget.group.id, key);
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}
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if (mounted) setState(() { _capsuleKey = key; _isUnlocking = false; });
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} catch (e) {
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if (mounted) setState(() { _unlockError = 'Failed to unlock capsule'; _isUnlocking = false; });
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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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if (isEncrypted && _isUnlocking) return _buildUnlockingScreen();
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if (isEncrypted && _unlockError != null) return _buildErrorScreen();
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return Scaffold(
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backgroundColor: AppTheme.scaffoldBg,
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body: NestedScrollView(
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headerSliverBuilder: (context, innerBoxIsScrolled) => [
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_buildHeader(context),
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_buildTabBar(),
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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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GroupFeedTab(
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groupId: widget.group.id,
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isEncrypted: isEncrypted,
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capsuleKey: _capsuleKey,
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currentUserId: _currentUserId,
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),
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GroupChatTab(
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groupId: widget.group.id,
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isEncrypted: isEncrypted,
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capsuleKey: _capsuleKey,
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currentUserId: _currentUserId,
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),
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GroupForumTab(
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groupId: widget.group.id,
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isEncrypted: isEncrypted,
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capsuleKey: _capsuleKey,
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),
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GroupMembersTab(
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groupId: widget.group.id,
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group: widget.group,
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isEncrypted: isEncrypted,
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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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Widget _buildHeader(BuildContext context) {
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return SliverAppBar(
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expandedHeight: 140,
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pinned: true,
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backgroundColor: AppTheme.cardSurface,
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foregroundColor: AppTheme.navyBlue,
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flexibleSpace: FlexibleSpaceBar(
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title: Row(
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mainAxisSize: MainAxisSize.min,
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children: [
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if (isEncrypted) ...[
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const Icon(Icons.lock, size: 14, color: Color(0xFF4CAF50)),
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const SizedBox(width: 6),
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],
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Flexible(
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child: Text(
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widget.group.name,
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style: TextStyle(fontWeight: FontWeight.w700, fontSize: 16, color: AppTheme.navyBlue),
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overflow: TextOverflow.ellipsis,
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),
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),
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],
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),
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background: Container(
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decoration: BoxDecoration(
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gradient: LinearGradient(
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begin: Alignment.topLeft,
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end: Alignment.bottomRight,
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colors: isEncrypted
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? [const Color(0xFFF0F8F0), AppTheme.scaffoldBg]
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: [AppTheme.brightNavy.withValues(alpha: 0.08), AppTheme.scaffoldBg],
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),
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),
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child: SafeArea(
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child: Padding(
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padding: const EdgeInsets.fromLTRB(16, 40, 16, 50),
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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Row(
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children: [
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_GroupBadge(isEncrypted: isEncrypted),
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const Spacer(),
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Icon(Icons.people, size: 14, color: SojornColors.textDisabled),
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const SizedBox(width: 4),
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Text('${widget.group.memberCount}',
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style: TextStyle(color: SojornColors.postContentLight, fontSize: 13)),
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if (isEncrypted) ...[
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const SizedBox(width: 12),
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Icon(Icons.vpn_key, size: 14, color: SojornColors.textDisabled),
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const SizedBox(width: 4),
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Text('v${widget.group.keyVersion}',
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style: TextStyle(color: SojornColors.textDisabled, fontSize: 11)),
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],
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],
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),
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if (widget.group.description.isNotEmpty) ...[
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const Spacer(),
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Text(
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widget.group.description,
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style: TextStyle(color: SojornColors.postContentLight, fontSize: 13),
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maxLines: 2,
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overflow: TextOverflow.ellipsis,
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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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),
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actions: [
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PopupMenuButton<String>(
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icon: Icon(Icons.more_vert, color: AppTheme.navyBlue),
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onSelected: (val) {
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if (val == 'settings') _showSettings();
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if (val == 'leave') _confirmLeave();
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},
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itemBuilder: (_) => [
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const PopupMenuItem(value: 'settings', child: Text('Group Settings')),
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const PopupMenuItem(value: 'leave', child: Text('Leave Group')),
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],
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),
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],
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);
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}
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SliverPersistentHeader _buildTabBar() {
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return SliverPersistentHeader(
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pinned: true,
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delegate: _TabBarDelegate(
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TabBar(
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controller: _tabController,
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indicatorColor: isEncrypted ? const Color(0xFF4CAF50) : AppTheme.brightNavy,
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labelColor: AppTheme.navyBlue,
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unselectedLabelColor: SojornColors.textDisabled,
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labelStyle: const TextStyle(fontSize: 12, fontWeight: FontWeight.w600),
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tabs: const [
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Tab(icon: Icon(Icons.dynamic_feed, size: 18), text: 'Feed'),
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Tab(icon: Icon(Icons.chat_bubble, size: 18), text: 'Chat'),
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Tab(icon: Icon(Icons.forum, size: 18), text: 'Forum'),
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Tab(icon: Icon(Icons.people, size: 18), text: 'Members'),
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],
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),
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),
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);
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}
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void _showSettings() {
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// TODO: Full settings sheet
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ScaffoldMessenger.of(context).showSnackBar(
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const SnackBar(content: Text('Group settings coming soon')),
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);
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}
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void _confirmLeave() {
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showDialog(
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context: context,
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builder: (ctx) => AlertDialog(
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title: const Text('Leave Group'),
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content: Text('Are you sure you want to leave ${widget.group.name}?'),
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actions: [
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TextButton(onPressed: () => Navigator.pop(ctx), child: const Text('Cancel')),
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TextButton(
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onPressed: () async {
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Navigator.pop(ctx);
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try {
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await ApiService.instance.leaveGroup(widget.group.id);
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if (mounted) Navigator.pop(context);
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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 leave: $e')),
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);
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}
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}
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},
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child: Text('Leave', style: TextStyle(color: SojornColors.destructive)),
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),
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],
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),
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);
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}
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Widget _buildUnlockingScreen() {
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return Scaffold(
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backgroundColor: AppTheme.scaffoldBg,
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body: Center(
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child: Column(
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mainAxisSize: MainAxisSize.min,
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children: [
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const Icon(Icons.lock, size: 48, color: Color(0xFF4CAF50)),
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const SizedBox(height: 20),
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Text('Decrypting…', style: TextStyle(color: SojornColors.textDisabled, fontSize: 14)),
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const SizedBox(height: 8),
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SizedBox(
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width: 120,
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child: LinearProgressIndicator(
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backgroundColor: AppTheme.navyBlue.withValues(alpha: 0.08),
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valueColor: const AlwaysStoppedAnimation<Color>(Color(0xFF4CAF50)),
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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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Widget _buildErrorScreen() {
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return Scaffold(
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backgroundColor: AppTheme.scaffoldBg,
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appBar: AppBar(backgroundColor: AppTheme.scaffoldBg, foregroundColor: AppTheme.navyBlue),
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body: Center(
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child: Column(
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mainAxisSize: MainAxisSize.min,
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children: [
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const Icon(Icons.lock, size: 48, color: SojornColors.destructive),
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const SizedBox(height: 16),
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Text(_unlockError!, style: const TextStyle(color: SojornColors.destructive, fontSize: 14)),
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const SizedBox(height: 16),
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ElevatedButton(
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onPressed: _unlockCapsule,
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style: ElevatedButton.styleFrom(backgroundColor: AppTheme.brightNavy, foregroundColor: SojornColors.basicWhite),
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child: const Text('Retry'),
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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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// ── Badge ─────────────────────────────────────────────────────────────────
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class _GroupBadge extends StatelessWidget {
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final bool isEncrypted;
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const _GroupBadge({required this.isEncrypted});
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@override
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Widget build(BuildContext context) {
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final color = isEncrypted ? const Color(0xFF4CAF50) : AppTheme.brightNavy;
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final label = isEncrypted ? 'E2E ENCRYPTED' : 'GROUP';
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final icon = isEncrypted ? Icons.shield : Icons.public;
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return Container(
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padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 3),
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decoration: BoxDecoration(
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color: color.withValues(alpha: 0.15),
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borderRadius: BorderRadius.circular(6),
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border: Border.all(color: color.withValues(alpha: 0.3)),
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),
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child: Row(
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mainAxisSize: MainAxisSize.min,
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children: [
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Icon(icon, size: 12, color: color),
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const SizedBox(width: 4),
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Text(label, style: TextStyle(color: color.withValues(alpha: 0.9), fontSize: 9, fontWeight: FontWeight.w700, letterSpacing: 0.8)),
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],
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),
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);
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}
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}
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// ── Tab Bar Delegate ──────────────────────────────────────────────────────
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class _TabBarDelegate extends SliverPersistentHeaderDelegate {
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final TabBar tabBar;
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_TabBarDelegate(this.tabBar);
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@override double get minExtent => tabBar.preferredSize.height;
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@override double get maxExtent => tabBar.preferredSize.height;
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@override
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Widget build(BuildContext context, double shrinkOffset, bool overlapsContent) {
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return Container(color: AppTheme.cardSurface, child: tabBar);
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}
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@override bool shouldRebuild(covariant _TabBarDelegate oldDelegate) => false;
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}
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