feat: Phase 3 — E2EE calls, Jitsi conferencing, help tab, web security model
- LiveKit call E2EE: CallE2EEManager exchanges encryption keys via Matrix to-device events (m.rtc.encryption_keys) for interop with Element X - Olm bootstrapped in index.html before Flutter init; main.dart logs result - Encrypted messages shown with lock icon and informative fallback text - Profile screen: key restore dialog + security setup (cross-signing/backup) - Jitsi feature: welcome screen (public, no login), conference tab, full-screen embed via JitsiMeetExternalAPI, JitsiLink parser for all common link formats - Help tab: expandable cards for encryption, video calls, account management - Web security model: no session persistence — device ID only across visits - Media auth: MSC3916 authenticated endpoint for avatars (Synapse 1.120+) - Router: welcome route as public landing page; jitsi route as public - Manifest/index.html: M8Chat branding, dark theme colours Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
218
lib/features/jitsi/presentation/welcome_screen.dart
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218
lib/features/jitsi/presentation/welcome_screen.dart
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// Version: 1.0.0 | Created: 2026-04-05
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// Welcome/landing screen — first thing unauthenticated users see.
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// Two paths: join a Jitsi conference (no login) or sign in for Matrix chat.
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import 'package:flutter/material.dart';
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import 'package:flutter_svg/flutter_svg.dart';
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import 'package:go_router/go_router.dart';
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class WelcomeScreen extends StatefulWidget {
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const WelcomeScreen({super.key});
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@override
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State<WelcomeScreen> createState() => _WelcomeScreenState();
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}
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class _WelcomeScreenState extends State<WelcomeScreen> {
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final _linkController = TextEditingController();
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@override
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void dispose() {
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_linkController.dispose();
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super.dispose();
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}
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void _joinConference() {
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final link = _linkController.text.trim();
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if (link.isEmpty) {
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ScaffoldMessenger.of(context).showSnackBar(
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const SnackBar(content: Text('Please paste a meeting link.')),
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);
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return;
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}
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context.go('/jitsi', extra: link);
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}
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@override
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Widget build(BuildContext context) {
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final theme = Theme.of(context);
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final isDark = theme.brightness == Brightness.dark;
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return Scaffold(
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body: SafeArea(
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child: Center(
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child: SingleChildScrollView(
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padding: const EdgeInsets.symmetric(horizontal: 32, vertical: 24),
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child: ConstrainedBox(
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constraints: const BoxConstraints(maxWidth: 440),
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child: Column(
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mainAxisAlignment: MainAxisAlignment.center,
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crossAxisAlignment: CrossAxisAlignment.stretch,
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children: [
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// --- Logo & tagline ---
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Column(
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children: [
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SvgPicture.asset(
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'assets/images/m8logo.svg',
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width: 80,
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height: 80,
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),
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const SizedBox(height: 16),
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Text(
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'M8Chat',
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style: theme.textTheme.headlineMedium?.copyWith(
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fontWeight: FontWeight.bold,
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color: theme.colorScheme.primary,
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),
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),
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const SizedBox(height: 8),
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Text(
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'Chat and conference — all in one place',
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textAlign: TextAlign.center,
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style: theme.textTheme.bodyMedium?.copyWith(
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color: theme.colorScheme.onSurface.withAlpha(153),
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),
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),
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],
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),
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const SizedBox(height: 48),
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// --- Conference section ---
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_SectionCard(
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theme: theme,
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isDark: isDark,
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icon: Icons.videocam_outlined,
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title: 'Join a Conference',
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subtitle: 'Paste your meeting link to join instantly — no account needed.',
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child: Column(
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children: [
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TextField(
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controller: _linkController,
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decoration: const InputDecoration(
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hintText: 'conf.m8chat.au/YourMeeting',
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prefixIcon: Icon(Icons.link),
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),
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textInputAction: TextInputAction.go,
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onSubmitted: (_) => _joinConference(),
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),
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const SizedBox(height: 12),
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ElevatedButton.icon(
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onPressed: _joinConference,
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icon: const Icon(Icons.videocam),
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label: const Text('Join Meeting'),
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),
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],
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),
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),
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const SizedBox(height: 20),
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// --- Divider ---
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Row(
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children: [
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const Expanded(child: Divider()),
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Padding(
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padding: const EdgeInsets.symmetric(horizontal: 16),
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child: Text(
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'or',
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style: theme.textTheme.bodySmall?.copyWith(
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color: theme.colorScheme.onSurface.withAlpha(102),
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),
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),
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),
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const Expanded(child: Divider()),
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],
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),
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const SizedBox(height: 20),
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// --- Sign in section ---
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_SectionCard(
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theme: theme,
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isDark: isDark,
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icon: Icons.chat_bubble_outline,
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title: 'Sign In to Chat',
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subtitle: 'Access your rooms, messages and video calls.',
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child: OutlinedButton.icon(
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onPressed: () => context.go('/login'),
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icon: const Icon(Icons.login),
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label: const Text('Sign In'),
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style: OutlinedButton.styleFrom(
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minimumSize: const Size.fromHeight(52),
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shape: RoundedRectangleBorder(
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borderRadius: BorderRadius.circular(12),
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),
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side: BorderSide(color: theme.colorScheme.primary),
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textStyle: const TextStyle(
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fontSize: 16,
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fontWeight: FontWeight.w600,
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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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),
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),
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);
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}
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}
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/// Styled card for each welcome section.
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class _SectionCard extends StatelessWidget {
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const _SectionCard({
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required this.theme,
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required this.isDark,
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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.child,
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});
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final ThemeData theme;
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final bool isDark;
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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 Widget child;
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@override
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Widget build(BuildContext context) {
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return Card(
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child: Padding(
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padding: const EdgeInsets.all(20),
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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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Icon(icon, color: theme.colorScheme.primary, size: 28),
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const SizedBox(width: 12),
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Expanded(
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child: Text(
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title,
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style: theme.textTheme.titleMedium?.copyWith(
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fontWeight: FontWeight.w600,
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),
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),
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),
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],
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),
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const SizedBox(height: 8),
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Text(
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subtitle,
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style: theme.textTheme.bodySmall?.copyWith(
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color: theme.colorScheme.onSurface.withAlpha(153),
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),
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),
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const SizedBox(height: 16),
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child,
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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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