Files
meshcore-open/lib/screens/channels_screen.dart
T
Seth Golub e1a4900dc0 Add UI for setting repeater identity keys
This adds a simple UI in repeater management settings for remotely
setting a repeater's private key. A key can be pasted from an external
key generator, or a random one can be generated here, optionally with a
specified prefix.

If a prefix is specified, searching is done in 30ms batches in order
to keep the UI responsive and show the progress indicator animation
smoothly. Searches can be interrupted. An estimation of search length is
given as expected number of generated key pairs. (A future improvement
would be to observe keys per second performance and give time estimates
based on that.)

When it generates a new private key on your behalf, it can tell you
what the corresponding public key will be. Unfortunately, if you paste
one in from another source, it can't compute the corresponding public
key. This is because the standard Dart crypto library doesn't provide
that capability, nor does it give access to the elliptic curve functions
it implements so we could do it ourselves. Our only recourse would be to
copy the source for all those things, and I didn't think it was worth
it.

This will not check the validity of a pasted key, but the remote
repeater will. It does limit it to the correct length and hexadecimal
charset.

Prefixes are limited to 4 characters. There's no technical reason for
this, but users are unlikely to want more, and I think it would just be
a bad experience to allow more and spin for a very long time. If someone
really wants a longer one, they can use an external generator like they
do now.

Possible TODO: rewrite background processing using isolates.

Closes #142.
2026-06-19 07:27:44 -07:00

2018 lines
78 KiB
Dart

import 'dart:async';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:meshcore_open/storage/channel_message_store.dart';
import 'package:meshcore_open/utils/keys.dart';
import 'package:meshcore_open/utils/platform_info.dart';
import 'package:meshcore_open/widgets/app_bar.dart';
import 'package:provider/provider.dart';
import 'package:uuid/uuid.dart';
import '../connector/meshcore_connector.dart';
import '../l10n/l10n.dart';
import '../services/app_settings_service.dart';
import '../services/ui_view_state_service.dart';
import '../models/channel.dart';
import '../models/community.dart';
import '../storage/community_store.dart';
import '../theme/mesh_theme.dart';
import '../utils/dialog_utils.dart';
import '../utils/disconnect_navigation_mixin.dart';
import '../utils/route_transitions.dart';
import '../widgets/list_filter_widget.dart';
import '../widgets/empty_state.dart';
import '../widgets/mesh_ui.dart';
import '../widgets/qr_code_display.dart';
import '../widgets/quick_switch_bar.dart';
import '../widgets/sync_progress_overlay.dart';
import '../widgets/unread_badge.dart';
import '../helpers/snack_bar_builder.dart';
import 'channel_chat_screen.dart';
import 'community_qr_scanner_screen.dart';
import 'contacts_screen.dart';
import 'map_screen.dart';
import 'settings_screen.dart';
class ChannelsScreen extends StatefulWidget {
final bool hideBackButton;
const ChannelsScreen({super.key, this.hideBackButton = false});
@override
State<ChannelsScreen> createState() => _ChannelsScreenState();
}
class _ChannelsScreenState extends State<ChannelsScreen>
with DisconnectNavigationMixin {
final TextEditingController _searchController = TextEditingController();
final CommunityStore _communityStore = CommunityStore();
final CommunityPskIndex _communityIndex = CommunityPskIndex();
List<Community> _communities = [];
Timer? _searchDebounce;
ChannelMessageStore get _channelMessageStore => ChannelMessageStore();
@override
void initState() {
super.initState();
_searchController.text = context
.read<UiViewStateService>()
.channelsSearchText;
WidgetsBinding.instance.addPostFrameCallback((_) {
context.read<MeshCoreConnector>().getChannels();
_loadCommunities();
});
}
Future<void> _loadCommunities() async {
final connector = context.read<MeshCoreConnector>();
_communityStore.setPublicKeyHex = connector.selfPublicKeyHex;
final communities = await _communityStore.loadCommunities();
if (mounted) {
setState(() {
_communities = communities;
_communityIndex.initialize(communities);
});
}
}
@override
void dispose() {
_searchDebounce?.cancel();
_searchController.dispose();
super.dispose();
}
String _relativeTime(DateTime t) {
final diff = DateTime.now().difference(t);
if (diff.inMinutes < 1) return 'now';
if (diff.inMinutes < 60) return '${diff.inMinutes}m';
if (diff.inHours < 24) return '${diff.inHours}h';
return '${diff.inDays}d';
}
@override
Widget build(BuildContext context) {
final connector = context.watch<MeshCoreConnector>();
final viewState = context.watch<UiViewStateService>();
final channelMessageStore = ChannelMessageStore();
channelMessageStore.setPublicKeyHex = connector.selfPublicKeyHex;
// Auto-navigate back to scanner if disconnected
if (!checkConnectionAndNavigate(connector)) {
return const SizedBox.shrink();
}
final allowBack = !connector.isConnected;
return PopScope(
canPop: allowBack,
child: Scaffold(
appBar: AppBar(
title: AppBarTitle(context.l10n.channels_title),
centerTitle: true,
automaticallyImplyLeading: false,
bottom: const SyncProgressAppBarBottom(),
actions: [
PopupMenuButton(
// onTap handlers run after the menu route pops, so they must
// capture the screen's context — not the itemBuilder's menu
// context, which is deactivated by then.
itemBuilder: (menuContext) => [
PopupMenuItem(
child: Row(
children: [
Icon(
Icons.logout,
color: Theme.of(menuContext).colorScheme.error,
),
const SizedBox(width: 8),
Text(menuContext.l10n.common_disconnect),
],
),
onTap: () => _disconnect(context),
),
PopupMenuItem(
child: Row(
children: [
const Icon(Icons.groups),
const SizedBox(width: 8),
Text(menuContext.l10n.community_manageCommunities),
],
),
onTap: () => _showManageCommunitiesDialog(context),
),
PopupMenuItem(
child: Row(
children: [
const Icon(Icons.settings),
const SizedBox(width: 8),
Text(menuContext.l10n.settings_title),
],
),
onTap: () => Navigator.push(
context,
MaterialPageRoute(
builder: (context) => const SettingsScreen(),
),
),
),
],
icon: const Icon(Icons.more_vert),
),
],
),
body: RefreshIndicator(
onRefresh: () async {
await context.read<MeshCoreConnector>().getChannels(force: true);
},
child: () {
final channels = connector.channels;
final waitingForFirstChannel =
connector.isLoadingChannels && channels.isEmpty;
// Only block the list while the first channel is actively loading.
// If the initial sync aborts, show cached/partial channels instead
// of trapping the user behind an idle spinner.
if (waitingForFirstChannel) {
return const Center(child: CircularProgressIndicator());
}
if (channels.isEmpty) {
return ListView(
children: [
SizedBox(
height: MediaQuery.of(context).size.height - 200,
child: EmptyState(
icon: Icons.tag,
title: context.l10n.channels_noChannelsConfigured,
action: FilledButton.icon(
onPressed: () => _addPublicChannel(context, connector),
icon: const Icon(Icons.public),
label: Text(context.l10n.channels_addPublicChannel),
),
),
),
],
);
}
final filteredChannels = _filterAndSortChannels(
channels,
connector,
viewState,
);
return Column(
children: [
Padding(
padding: const EdgeInsets.all(8.0),
child: TextField(
controller: _searchController,
decoration: InputDecoration(
hintText: context.l10n.channels_searchChannels,
prefixIcon: const Icon(Icons.search),
suffixIcon: Row(
mainAxisSize: MainAxisSize.min,
children: [
if (viewState.channelsSearchText.isNotEmpty)
IconButton(
icon: const Icon(Icons.clear),
onPressed: () {
_searchDebounce?.cancel();
_searchDebounce = null;
_searchController.clear();
context
.read<UiViewStateService>()
.setChannelsSearchText('');
},
),
_buildFilterButton(viewState),
],
),
contentPadding: const EdgeInsets.symmetric(
horizontal: 16,
vertical: 12,
),
),
onChanged: (value) {
_searchDebounce?.cancel();
_searchDebounce = Timer(
const Duration(milliseconds: 300),
() {
if (!mounted) return;
context
.read<UiViewStateService>()
.setChannelsSearchText(value);
},
);
},
),
),
Expanded(
child: filteredChannels.isEmpty
? LayoutBuilder(
builder: (context, constraints) => ListView(
physics: const AlwaysScrollableScrollPhysics(),
children: [
ConstrainedBox(
constraints: BoxConstraints(
minHeight: constraints.maxHeight,
),
child: EmptyState(
icon: Icons.search_off,
title: context.l10n.channels_noChannelsFound,
),
),
],
),
)
: (viewState.channelsSortOption ==
ChannelSortOption.manual &&
viewState.channelsSearchText.isEmpty)
? ReorderableListView.builder(
padding: const EdgeInsets.only(
left: 0,
right: 0,
top: 8,
bottom: 88,
),
buildDefaultDragHandles: false,
itemCount: filteredChannels.length,
onReorderItem: (oldIndex, newIndex) {
// onReorderItem already adjusts newIndex after the
// removed item, unlike the deprecated onReorder.
final reordered = List<Channel>.from(
filteredChannels,
);
final item = reordered.removeAt(oldIndex);
reordered.insert(newIndex, item);
unawaited(
connector.setChannelOrder(
reordered.map((c) => c.index).toList(),
),
);
},
itemBuilder: (context, index) {
final channel = filteredChannels[index];
return _buildChannelTile(
context,
connector,
channelMessageStore,
channel,
showDragHandle: true,
dragIndex: index,
listIndex: index,
);
},
)
: ListView.builder(
padding: const EdgeInsets.only(
left: 0,
right: 0,
top: 8,
bottom: 88,
),
itemCount: filteredChannels.length,
itemBuilder: (context, index) {
final channel = filteredChannels[index];
return _buildChannelTile(
context,
connector,
channelMessageStore,
channel,
listIndex: index,
);
},
),
),
],
);
}(),
),
floatingActionButton: FloatingActionButton(
onPressed: () => _showAddChannelDialog(context),
tooltip: context.l10n.channels_addChannel,
child: const Icon(Icons.add),
),
bottomNavigationBar: SafeArea(
top: false,
child: QuickSwitchBar(
selectedIndex: 1,
onDestinationSelected: (index) =>
_handleQuickSwitch(index, context),
contactsUnreadCount: connector.getTotalContactsUnreadCount(),
channelsUnreadCount: connector.getTotalChannelsUnreadCount(),
),
),
),
);
}
Widget _buildChannelTile(
BuildContext context,
MeshCoreConnector connector,
ChannelMessageStore channelMessageStore,
Channel channel, {
bool showDragHandle = false,
int? dragIndex,
int listIndex = 0,
}) {
final unreadCount = connector.getUnreadCountForChannel(channel);
final isMuted = context.watch<AppSettingsService>().isChannelMuted(
channel.name,
);
final scheme = Theme.of(context).colorScheme;
// Determine icon and colors based on channel type
IconData icon;
Color iconColor;
final ChannelType channelType = Channel.getChannelType(
channel,
_communityIndex,
);
final bool isCommunityChannel = Channel.isCommunityChannel(channelType);
final community = isCommunityChannel
? _communityIndex.getCommunityForChannel(channel)
: null;
// Only flood-routed channels carry a region; show it when one is set.
String subtitle = connector.hasChannelRegion(channel.index)
? context.l10n.channels_regionSetTo(
connector.getChannelRegion(channel.index),
)
: '';
switch (channelType) {
case ChannelType.communityPublic:
icon = Icons.groups;
iconColor = MeshPalette.magenta;
if (community != null) {
subtitle =
'${context.l10n.community_publicChannel}${community.name}';
}
case ChannelType.communityHashtag:
icon = Icons.groups;
iconColor = MeshPalette.magenta;
if (community != null) {
subtitle =
'${context.l10n.community_hashtagChannel}${community.name}';
}
case ChannelType.public:
icon = Icons.public;
iconColor = MeshPalette.signal;
case ChannelType.hashtag:
icon = Icons.tag;
iconColor = MeshPalette.blue;
case ChannelType.private:
icon = Icons.lock;
iconColor = MeshPalette.blue;
}
// Last message preview
final messages = connector.getChannelMessages(channel);
final lastMessage = messages.isNotEmpty ? messages.last : null;
final lastPreview = lastMessage?.text ?? '';
final lastTime = lastMessage?.timestamp;
final channelLabel = channel.name.isEmpty
? context.l10n.channels_channelIndex(channel.index)
: channel.name;
return ListEntrance(
key: ValueKey('channel_entrance_${channel.index}'),
index: dragIndex ?? listIndex,
child: MeshCard(
key: ValueKey('channel_${channel.index}'),
margin: const EdgeInsets.symmetric(horizontal: 16, vertical: 4),
padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 10),
onTap: () {
HapticFeedback.selectionClick();
final unread = connector.getUnreadCountForChannelIndex(channel.index);
connector.markChannelRead(channel.index);
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => ChannelChatScreen(
channel: channel,
initialUnreadCount: unread,
),
),
);
},
onLongPress: () => _showChannelActions(
this.context,
connector,
channelMessageStore,
channel,
),
onSecondaryTap: PlatformInfo.isDesktop
? () => _showChannelActions(
this.context,
connector,
channelMessageStore,
channel,
)
: null,
child: Row(
crossAxisAlignment: CrossAxisAlignment.center,
children: [
// Leading avatar with optional community badge
Stack(
clipBehavior: Clip.none,
children: [
AvatarCircle(
name: channelLabel,
size: 42,
color: iconColor,
icon: icon,
),
if (isCommunityChannel)
Positioned(
right: -2,
bottom: -2,
child: Container(
width: 16,
height: 16,
decoration: BoxDecoration(
color: MeshPalette.magenta,
shape: BoxShape.circle,
border: Border.all(
color: Theme.of(
context,
).colorScheme.surfaceContainerLow,
width: 2,
),
),
child: const Icon(
Icons.people,
size: 8,
color: Colors.white,
),
),
),
],
),
const SizedBox(width: 12),
// Title + subtitle + ch chip
Expanded(
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
mainAxisSize: MainAxisSize.min,
children: [
Row(
crossAxisAlignment: CrossAxisAlignment.center,
children: [
Expanded(
child: Text(
channelLabel,
style: Theme.of(context).textTheme.bodyMedium
?.copyWith(fontWeight: FontWeight.w500),
maxLines: 1,
overflow: TextOverflow.ellipsis,
),
),
const SizedBox(width: 6),
StatusChip(
label: 'CH ${channel.index}',
color: MeshPalette.blue,
fontSize: 10,
),
],
),
if (subtitle.isNotEmpty) ...[
const SizedBox(height: 2),
Text(
subtitle,
style: Theme.of(context).textTheme.bodySmall?.copyWith(
color: scheme.onSurfaceVariant,
),
maxLines: 1,
overflow: TextOverflow.ellipsis,
),
],
if (lastPreview.isNotEmpty) ...[
const SizedBox(height: 2),
Text(
lastPreview,
style: MeshTheme.mono(
fontSize: 11.5,
color: scheme.onSurfaceVariant,
),
maxLines: 1,
overflow: TextOverflow.ellipsis,
),
],
],
),
),
const SizedBox(width: 8),
// Right side: time + unread badge + muted + drag handle
Column(
crossAxisAlignment: CrossAxisAlignment.end,
mainAxisSize: MainAxisSize.min,
children: [
if (lastTime != null)
Text(
_relativeTime(lastTime),
style: MeshTheme.mono(
fontSize: 11,
color: scheme.onSurfaceVariant,
),
),
const SizedBox(height: 4),
Row(
mainAxisSize: MainAxisSize.min,
children: [
if (isMuted) ...[
Icon(
Icons.notifications_off,
size: 14,
color: scheme.onSurfaceVariant,
),
const SizedBox(width: 4),
],
if (unreadCount > 0) UnreadBadge(count: unreadCount),
],
),
],
),
if (showDragHandle && dragIndex != null) ...[
const SizedBox(width: 4),
ReorderableDragStartListener(
index: dragIndex,
child: Padding(
padding: const EdgeInsets.all(8),
child: Icon(
Icons.drag_handle,
color: scheme.onSurfaceVariant,
),
),
),
],
],
),
),
);
}
void _showChannelActions(
BuildContext context,
MeshCoreConnector connector,
ChannelMessageStore channelMessageStore,
Channel channel,
) {
final parentContext = context;
final settingsService = context.read<AppSettingsService>();
final isMuted = settingsService.isChannelMuted(channel.name);
showModalBottomSheet(
context: parentContext,
builder: (sheetContext) => SafeArea(
child: Column(
mainAxisSize: MainAxisSize.min,
children: [
ListTile(
leading: const Icon(Icons.edit_outlined),
title: Text(sheetContext.l10n.channels_editChannel),
onTap: () async {
Navigator.pop(sheetContext);
await Future.delayed(const Duration(milliseconds: 100));
if (parentContext.mounted) {
_showEditChannelDialog(parentContext, connector, channel);
}
},
),
ListTile(
leading: Icon(
isMuted
? Icons.notifications_outlined
: Icons.notifications_off_outlined,
),
title: Text(
isMuted
? sheetContext.l10n.channels_unmuteChannel
: sheetContext.l10n.channels_muteChannel,
),
onTap: () async {
Navigator.pop(sheetContext);
if (isMuted) {
await settingsService.unmuteChannel(channel.name);
} else {
await settingsService.muteChannel(channel.name);
}
},
),
ListTile(
leading: Icon(
Icons.delete_outline,
color: Theme.of(sheetContext).colorScheme.error,
),
title: Text(
sheetContext.l10n.channels_deleteChannel,
style: TextStyle(
color: Theme.of(sheetContext).colorScheme.error,
),
),
onTap: () async {
Navigator.pop(sheetContext);
await Future.delayed(const Duration(milliseconds: 100));
if (parentContext.mounted) {
_confirmDeleteChannel(
parentContext,
connector,
channelMessageStore,
channel,
);
}
},
),
],
),
),
);
}
void _handleQuickSwitch(int index, BuildContext context) {
if (index == 1) return;
switch (index) {
case 0:
Navigator.pushReplacement(
context,
buildQuickSwitchRoute(const ContactsScreen(hideBackButton: true)),
);
break;
case 2:
Navigator.pushReplacement(
context,
buildQuickSwitchRoute(const MapScreen(hideBackButton: true)),
);
break;
}
}
Future<void> _disconnect(BuildContext context) async {
final connector = context.read<MeshCoreConnector>();
await showDisconnectDialog(context, connector);
}
Widget _buildFilterButton(UiViewStateService viewState) {
return SortFilterMenu<ChannelSortOption>(
tooltip: context.l10n.listFilter_tooltip,
sections: [
SortFilterMenuSection<ChannelSortOption>(
title: context.l10n.channels_sortBy,
options: [
SortFilterMenuOption<ChannelSortOption>(
value: ChannelSortOption.manual,
label: context.l10n.channels_sortManual,
checked: viewState.channelsSortOption == ChannelSortOption.manual,
),
SortFilterMenuOption<ChannelSortOption>(
value: ChannelSortOption.name,
label: context.l10n.channels_sortAZ,
checked: viewState.channelsSortOption == ChannelSortOption.name,
),
SortFilterMenuOption<ChannelSortOption>(
value: ChannelSortOption.latestMessages,
label: context.l10n.channels_sortLatestMessages,
checked:
viewState.channelsSortOption ==
ChannelSortOption.latestMessages,
),
SortFilterMenuOption<ChannelSortOption>(
value: ChannelSortOption.unread,
label: context.l10n.channels_sortUnread,
checked: viewState.channelsSortOption == ChannelSortOption.unread,
),
],
),
],
onSelected: (sortOption) {
viewState.setChannelsSortOption(sortOption);
},
);
}
List<Channel> _filterAndSortChannels(
List<Channel> channels,
MeshCoreConnector connector,
UiViewStateService viewState,
) {
var filtered = channels.where((channel) {
if (viewState.channelsSearchText.isEmpty) return true;
final label = _normalizeChannelName(channel);
return label.toLowerCase().contains(
viewState.channelsSearchText.toLowerCase(),
);
}).toList();
int compareByName(Channel a, Channel b) {
final nameA = _normalizeChannelName(a);
final nameB = _normalizeChannelName(b);
return nameA.toLowerCase().compareTo(nameB.toLowerCase());
}
switch (viewState.channelsSortOption) {
case ChannelSortOption.manual:
break;
case ChannelSortOption.latestMessages:
filtered.sort((a, b) {
final aMessages = connector.getChannelMessages(a);
final bMessages = connector.getChannelMessages(b);
final aLast = aMessages.isEmpty
? DateTime(1970)
: aMessages.last.timestamp;
final bLast = bMessages.isEmpty
? DateTime(1970)
: bMessages.last.timestamp;
final timeCompare = bLast.compareTo(aLast);
if (timeCompare != 0) return timeCompare;
return compareByName(a, b);
});
break;
case ChannelSortOption.unread:
filtered.sort((a, b) {
final aUnread = connector.getUnreadCountForChannel(a);
final bUnread = connector.getUnreadCountForChannel(b);
final unreadCompare = bUnread.compareTo(aUnread);
if (unreadCompare != 0) return unreadCompare;
return compareByName(a, b);
});
break;
case ChannelSortOption.name:
filtered.sort(compareByName);
break;
}
return filtered;
}
String _normalizeChannelName(Channel channel) {
if (channel.name.isEmpty) {
return 'Channel ${channel.index}'; // Fallback for sorting
}
final trimmed = channel.name.trim();
if (trimmed.startsWith('#') && trimmed.length > 1) {
return trimmed.substring(1);
}
return trimmed;
}
void _showAddChannelDialog(BuildContext context) {
final connector = context.read<MeshCoreConnector>();
final nextIndex = _findNextAvailableIndex(
connector.channels,
connector.maxChannels,
);
final hasPublicChannel = connector.channels.any((c) => c.isPublicChannel);
int? selectedOption;
final nameController = TextEditingController();
final pskController = TextEditingController();
final hashtagController = TextEditingController();
bool addPublicChannel = true;
bool isRegularHashtag = true;
Community? selectedCommunity;
_communityStore.setPublicKeyHex = connector.selfPublicKeyHex;
showMeshSheet(
context,
builder: (sheetContext) => StatefulBuilder(
builder: (sheetContext, setSheetState) {
Widget buildOptionCard({
required int optionIndex,
required IconData icon,
required String title,
required String subtitle,
bool enabled = true,
}) {
final isSelected = selectedOption == optionIndex;
final cardScheme = Theme.of(sheetContext).colorScheme;
return MeshCard(
margin: const EdgeInsets.symmetric(horizontal: 16, vertical: 4),
padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 10),
borderColor: isSelected && enabled ? MeshPalette.blueLine : null,
color: isSelected && enabled ? MeshPalette.blueBg : null,
onTap: enabled
? () {
setSheetState(() {
selectedOption = optionIndex;
nameController.clear();
pskController.clear();
hashtagController.clear();
});
}
: null,
child: Row(
children: [
AvatarCircle(
name: title,
size: 38,
color: enabled
? (isSelected
? MeshPalette.blue
: cardScheme.onSurfaceVariant)
: cardScheme.outline,
icon: icon,
),
const SizedBox(width: 12),
Expanded(
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
mainAxisSize: MainAxisSize.min,
children: [
Text(
title,
style: Theme.of(sheetContext).textTheme.bodyMedium
?.copyWith(
fontWeight: FontWeight.w500,
color: enabled ? null : cardScheme.outline,
),
),
const SizedBox(height: 2),
Text(
subtitle,
style: Theme.of(sheetContext).textTheme.bodySmall
?.copyWith(
color: enabled
? cardScheme.onSurfaceVariant
: cardScheme.outline,
),
maxLines: 2,
overflow: TextOverflow.ellipsis,
),
],
),
),
if (enabled)
Icon(
Icons.chevron_right,
color: isSelected
? MeshPalette.blue
: cardScheme.onSurfaceVariant,
size: 20,
),
],
),
);
}
Widget? buildExpandedContent(
ChannelMessageStore channelMessageStore,
) {
switch (selectedOption) {
case 0: // Create Private Channel
return Column(
children: [
Padding(
padding: const EdgeInsets.symmetric(
horizontal: 16,
vertical: 8,
),
child: TextField(
controller: nameController,
decoration: InputDecoration(
labelText: sheetContext.l10n.channels_channelName,
border: const OutlineInputBorder(),
),
maxLength: 31,
),
),
Padding(
padding: const EdgeInsets.symmetric(horizontal: 16),
child: Row(
children: [
Expanded(
child: FilledButton(
onPressed: () async {
final name = nameController.text.trim();
if (name.isEmpty) {
showDismissibleSnackBar(
context,
content: Text(
sheetContext
.l10n
.channels_enterChannelName,
),
);
return;
}
final psk = randomBytes(16);
Navigator.pop(sheetContext);
await connector.setChannel(
nextIndex,
name,
psk,
);
await channelMessageStore.clearChannelMessages(
nextIndex,
);
if (context.mounted) {
showDismissibleSnackBar(
context,
content: Text(
context.l10n.channels_channelAdded(name),
),
);
}
},
child: Text(sheetContext.l10n.common_create),
),
),
],
),
),
const SizedBox(height: 8),
],
);
case 1: // Join Private Channel
return Column(
children: [
Padding(
padding: const EdgeInsets.symmetric(
horizontal: 16,
vertical: 8,
),
child: TextField(
controller: nameController,
decoration: InputDecoration(
labelText: sheetContext.l10n.channels_channelName,
border: const OutlineInputBorder(),
),
maxLength: 31,
),
),
Padding(
padding: const EdgeInsets.symmetric(
horizontal: 16,
vertical: 8,
),
child: TextField(
controller: pskController,
decoration: InputDecoration(
labelText: sheetContext.l10n.channels_pskHex,
border: const OutlineInputBorder(),
),
),
),
Padding(
padding: const EdgeInsets.symmetric(horizontal: 16),
child: Row(
children: [
Expanded(
child: FilledButton(
onPressed: () {
final name = nameController.text.trim();
final pskHex = pskController.text.trim();
if (name.isEmpty) {
showDismissibleSnackBar(
context,
content: Text(
sheetContext
.l10n
.channels_enterChannelName,
),
);
return;
}
Uint8List psk;
try {
psk = Channel.parsePskHex(pskHex);
} on FormatException {
showDismissibleSnackBar(
context,
content: Text(
sheetContext.l10n.channels_pskMustBe32Hex,
),
);
return;
}
Navigator.pop(sheetContext);
connector.setChannel(nextIndex, name, psk);
if (context.mounted) {
showDismissibleSnackBar(
context,
content: Text(
context.l10n.channels_channelAdded(name),
),
);
}
},
child: Text(sheetContext.l10n.common_add),
),
),
],
),
),
const SizedBox(height: 8),
],
);
case 2: // Join Public Channel
return Padding(
padding: const EdgeInsets.symmetric(
horizontal: 16,
vertical: 8,
),
child: Row(
children: [
Expanded(
child: FilledButton(
onPressed: () {
final psk = Channel.parsePskHex(
Channel.publicChannelPsk,
);
Navigator.pop(sheetContext);
connector.setChannel(
nextIndex,
context.l10n.channels_public,
psk,
);
if (context.mounted) {
showDismissibleSnackBar(
context,
content: Text(
context.l10n.channels_publicChannelAdded,
),
);
}
},
child: Text(sheetContext.l10n.common_add),
),
),
],
),
);
case 3: // Join Hashtag Channel
return Column(
children: [
// Only show type selection if user has communities
if (_communities.isNotEmpty) ...[
RadioGroup<bool>(
groupValue: isRegularHashtag,
onChanged: (v) => setSheetState(() {
if (v == null) return;
isRegularHashtag = v;
if (isRegularHashtag) {
selectedCommunity = null;
} else if (selectedCommunity == null &&
_communities.isNotEmpty) {
selectedCommunity = _communities.first;
}
}),
child: Column(
children: [
RadioListTile<bool>(
value: true,
title: Text(
sheetContext.l10n.community_regularHashtag,
),
subtitle: Text(
sheetContext.l10n.community_regularHashtagDesc,
),
dense: true,
),
RadioListTile<bool>(
value: false,
title: Text(
sheetContext.l10n.community_communityHashtag,
),
subtitle: Text(
sheetContext
.l10n
.community_communityHashtagDesc,
),
dense: true,
),
],
),
),
],
// Community dropdown (only if community hashtag selected)
if (!isRegularHashtag && _communities.isNotEmpty)
Padding(
padding: const EdgeInsets.symmetric(
horizontal: 16,
vertical: 8,
),
child: DropdownButtonFormField<Community>(
initialValue: selectedCommunity,
items: _communities
.map(
(c) => DropdownMenuItem(
value: c,
child: Text(c.name),
),
)
.toList(),
onChanged: (c) =>
setSheetState(() => selectedCommunity = c),
decoration: InputDecoration(
labelText:
sheetContext.l10n.community_selectCommunity,
border: const OutlineInputBorder(),
prefixIcon: const Icon(Icons.groups),
),
),
),
// Hashtag name input
Padding(
padding: const EdgeInsets.symmetric(
horizontal: 16,
vertical: 8,
),
child: TextField(
controller: hashtagController,
decoration: InputDecoration(
labelText: sheetContext.l10n.channels_enterHashtag,
hintText: sheetContext.l10n.channels_hashtagHint,
border: const OutlineInputBorder(),
prefixIcon: const Icon(Icons.tag),
),
maxLength: 31,
),
),
// Privacy hint for community hashtags
if (!isRegularHashtag)
Padding(
padding: const EdgeInsets.symmetric(horizontal: 16),
child: Text(
sheetContext.l10n.community_hashtagPrivacyHint,
style: TextStyle(
fontSize: 12,
color: Theme.of(
sheetContext,
).colorScheme.onSurfaceVariant,
fontStyle: FontStyle.italic,
),
),
),
Padding(
padding: const EdgeInsets.symmetric(
horizontal: 16,
vertical: 8,
),
child: Row(
children: [
Expanded(
child: FilledButton(
onPressed: () async {
var hashtag = hashtagController.text.trim();
if (hashtag.isEmpty) {
showDismissibleSnackBar(
context,
content: Text(
sheetContext
.l10n
.channels_enterChannelName,
),
);
return;
}
// Normalize hashtag name (remove leading # if present)
if (hashtag.startsWith('#')) {
hashtag = hashtag.substring(1);
}
final String channelName;
final Uint8List psk;
if (isRegularHashtag) {
channelName = '#$hashtag';
// Regular hashtag - public derivation using SHA256
psk = Channel.derivePskFromHashtag(hashtag);
} else {
// Community hashtag - HMAC derivation from community secret
if (selectedCommunity == null) {
showDismissibleSnackBar(
sheetContext,
content: Text(
sheetContext
.l10n
.community_selectCommunity,
),
);
return;
}
channelName =
'${selectedCommunity!.name} #$hashtag';
psk = selectedCommunity!
.deriveCommunityHashtagPsk(hashtag);
// Track in community's hashtag list
await _communityStore.addHashtagChannel(
selectedCommunity!.id,
hashtag,
);
_loadCommunities();
}
if (sheetContext.mounted) {
Navigator.pop(sheetContext);
}
connector.setChannel(
nextIndex,
channelName,
psk,
);
if (context.mounted) {
showDismissibleSnackBar(
context,
content: Text(
context.l10n.channels_channelAdded(
channelName,
),
),
);
}
},
child: Text(sheetContext.l10n.common_add),
),
),
],
),
),
],
);
case 4: // Scan Community QR
return Padding(
padding: const EdgeInsets.symmetric(
horizontal: 16,
vertical: 8,
),
child: Row(
children: [
Expanded(
child: FilledButton.icon(
onPressed: () async {
Navigator.pop(sheetContext);
if (context.mounted) {
final result = await Navigator.push<Community>(
context,
MaterialPageRoute(
builder: (context) =>
const CommunityQrScannerScreen(),
),
);
// Result handled by scanner screen
if (result != null && context.mounted) {
// Community was joined, refresh might be needed
}
}
},
icon: const Icon(Icons.qr_code_scanner),
label: Text(sheetContext.l10n.community_scanQr),
),
),
],
),
);
case 5: // Create Community
return Column(
children: [
Padding(
padding: const EdgeInsets.symmetric(
horizontal: 16,
vertical: 8,
),
child: TextField(
controller: nameController,
decoration: InputDecoration(
labelText: sheetContext.l10n.community_name,
hintText: sheetContext.l10n.community_enterName,
border: const OutlineInputBorder(),
prefixIcon: const Icon(Icons.groups),
),
maxLength: 31,
),
),
CheckboxListTile(
value: addPublicChannel,
onChanged: (value) {
setSheetState(() {
addPublicChannel = value ?? true;
});
},
title: Text(sheetContext.l10n.community_addPublicChannel),
subtitle: Text(
sheetContext.l10n.community_addPublicChannelHint,
),
controlAffinity: ListTileControlAffinity.leading,
contentPadding: const EdgeInsets.symmetric(
horizontal: 16,
),
),
Padding(
padding: const EdgeInsets.symmetric(horizontal: 16),
child: Row(
children: [
Expanded(
child: FilledButton(
onPressed: () async {
final name = nameController.text.trim();
final publicLabel =
context.l10n.channels_public;
if (name.isEmpty) {
showDismissibleSnackBar(
context,
content: Text(
sheetContext.l10n.community_enterName,
),
);
return;
}
// Create community with random secret
final community = Community.create(
id: const Uuid().v4(),
name: name,
);
// Save to store
await _communityStore.addCommunity(community);
// Optionally add the community public channel to the device
if (addPublicChannel) {
final psk = community
.deriveCommunityPublicPsk();
final channelName =
'${community.name} $publicLabel';
connector.setChannel(
nextIndex,
channelName,
psk,
);
}
if (sheetContext.mounted) {
Navigator.pop(sheetContext);
}
// Refresh communities list
_loadCommunities();
if (context.mounted) {
showDismissibleSnackBar(
context,
content: Text(
context.l10n.community_created(name),
),
);
// Show QR code dialog
await QrCodeShareDialog.show(
context: context,
data: community.toQrJson(),
title: context.l10n.community_qrTitle,
instructions: context.l10n
.community_qrInstructions(name),
embeddedImage: Image.asset(
'assets/images/mesh-icon.png',
width: 40,
height: 40,
),
);
}
},
child: Text(sheetContext.l10n.common_create),
),
),
],
),
),
const SizedBox(height: 8),
],
);
default:
return null;
}
}
return DraggableScrollableSheet(
expand: false,
initialChildSize: 0.7,
minChildSize: 0.4,
maxChildSize: 0.95,
builder: (_, scrollController) => Column(
children: [
BottomSheetHeader(title: sheetContext.l10n.channels_addChannel),
Expanded(
child: ListView(
controller: scrollController,
padding: const EdgeInsets.only(bottom: 24),
children: [
buildOptionCard(
optionIndex: 0,
icon: Icons.add,
title: sheetContext.l10n.channels_createPrivateChannel,
subtitle:
sheetContext.l10n.channels_createPrivateChannelDesc,
),
if (selectedOption == 0)
buildExpandedContent(_channelMessageStore)!,
buildOptionCard(
optionIndex: 1,
icon: Icons.lock,
title: sheetContext.l10n.channels_joinPrivateChannel,
subtitle:
sheetContext.l10n.channels_joinPrivateChannelDesc,
),
if (selectedOption == 1)
buildExpandedContent(_channelMessageStore)!,
if (!hasPublicChannel) ...[
buildOptionCard(
optionIndex: 2,
icon: Icons.public,
title: sheetContext.l10n.channels_joinPublicChannel,
subtitle:
sheetContext.l10n.channels_joinPublicChannelDesc,
),
if (selectedOption == 2)
buildExpandedContent(_channelMessageStore)!,
],
buildOptionCard(
optionIndex: 3,
icon: Icons.tag,
title: sheetContext.l10n.channels_joinHashtagChannel,
subtitle:
sheetContext.l10n.channels_joinHashtagChannelDesc,
),
if (selectedOption == 3)
buildExpandedContent(_channelMessageStore)!,
buildOptionCard(
optionIndex: 4,
icon: Icons.qr_code_scanner,
title: sheetContext.l10n.community_scanQr,
subtitle: sheetContext.l10n.community_join,
),
if (selectedOption == 4)
buildExpandedContent(_channelMessageStore)!,
buildOptionCard(
optionIndex: 5,
icon: Icons.groups,
title: sheetContext.l10n.community_create,
subtitle: sheetContext.l10n.community_createDesc,
),
if (selectedOption == 5)
buildExpandedContent(_channelMessageStore)!,
],
),
),
],
),
);
},
),
);
}
void _showEditChannelDialog(
BuildContext context,
MeshCoreConnector connector,
Channel channel,
) {
final appSettingsService = Provider.of<AppSettingsService>(
context,
listen: false,
);
final nameController = TextEditingController(text: channel.name);
final pskController = TextEditingController(text: channel.pskHex);
bool smazEnabled = connector.isChannelSmazEnabled(channel.index);
bool cyr2latEnabled = connector.isChannelCyr2LatEnabled(channel.index);
String? selectedCyr2LatProfileId = connector.getChannelCyr2LatProfileId(
channel.index,
);
showMeshSheet(
context,
builder: (sheetContext) => StatefulBuilder(
builder: (sheetContext, setSheetState) => DraggableScrollableSheet(
expand: false,
initialChildSize: 0.65,
minChildSize: 0.4,
maxChildSize: 0.95,
builder: (_, scrollController) => Column(
children: [
BottomSheetHeader(
title: sheetContext.l10n.channels_editChannelTitle(
channel.index,
),
),
Expanded(
child: ListView(
controller: scrollController,
padding: const EdgeInsets.symmetric(horizontal: 16),
children: [
const SizedBox(height: 8),
TextField(
controller: nameController,
decoration: InputDecoration(
labelText: sheetContext.l10n.channels_channelName,
border: const OutlineInputBorder(),
),
maxLength: 31,
),
const SizedBox(height: 16),
TextField(
controller: pskController,
decoration: InputDecoration(
labelText: sheetContext.l10n.channels_pskHex,
border: const OutlineInputBorder(),
suffixIcon: IconButton(
icon: const Icon(Icons.casino),
tooltip: sheetContext.l10n.channels_generateRandomPsk,
onPressed: () {
final bytes = randomBytes(16);
pskController.text = Channel.formatPskHex(bytes);
},
),
),
),
const SizedBox(height: 16),
SwitchListTile(
contentPadding: EdgeInsets.zero,
title: Text(sheetContext.l10n.channels_smazCompression),
value: smazEnabled,
onChanged: (value) => setSheetState(() {
smazEnabled = value;
if (smazEnabled) {
cyr2latEnabled = false;
}
}),
),
SwitchListTile(
contentPadding: EdgeInsets.zero,
title: Text(
sheetContext.l10n.channels_cyr2latCompression,
),
subtitle: Text(
sheetContext.l10n.channels_cyr2latCompressionDscr,
),
value: cyr2latEnabled,
onChanged: (value) => setSheetState(() {
cyr2latEnabled = value;
if (cyr2latEnabled) {
smazEnabled = false;
}
}),
),
if (cyr2latEnabled) ...[
Padding(
padding: const EdgeInsets.fromLTRB(0, 8, 0, 8),
child: DropdownButtonFormField<String>(
initialValue: selectedCyr2LatProfileId,
decoration: InputDecoration(
labelText: sheetContext
.l10n
.channels_cyr2latSettingsSubheading,
border: const OutlineInputBorder(),
),
items: appSettingsService.settings.cyr2latProfiles
.map((profile) {
return DropdownMenuItem(
value: profile.id,
child: Text(profile.name),
);
})
.toList(),
onChanged: (value) => setSheetState(() {
selectedCyr2LatProfileId = value;
}),
),
),
],
const SizedBox(height: 24),
],
),
),
Padding(
padding: const EdgeInsets.fromLTRB(16, 8, 16, 16),
child: Row(
children: [
Expanded(
child: OutlinedButton(
onPressed: () => Navigator.pop(sheetContext),
child: Text(sheetContext.l10n.common_cancel),
),
),
const SizedBox(width: 12),
Expanded(
child: FilledButton(
onPressed: () async {
final name = nameController.text.trim();
final pskHex = pskController.text.trim();
Uint8List psk;
try {
psk = Channel.parsePskHex(pskHex);
} on FormatException {
showDismissibleSnackBar(
sheetContext,
content: Text(
sheetContext.l10n.channels_pskMustBe32Hex,
),
);
return;
}
Navigator.pop(sheetContext);
try {
await connector.setChannel(
channel.index,
name,
psk,
);
await connector.setChannelSmazEnabled(
channel.index,
smazEnabled,
);
await connector.setChannelCyr2LatEnabled(
channel.index,
cyr2latEnabled,
);
await connector.setChannelCyr2LatProfileId(
channel.index,
selectedCyr2LatProfileId,
);
if (!context.mounted) return;
showDismissibleSnackBar(
context,
content: Text(
context.l10n.channels_channelUpdated(name),
),
);
} catch (e, st) {
debugPrint(st.toString());
if (!context.mounted) return;
showDismissibleSnackBar(
context,
content: Text(
context.l10n.channels_channelUpdateFailed('$e'),
),
);
}
},
child: Text(sheetContext.l10n.common_save),
),
),
],
),
),
],
),
),
),
);
}
void _confirmDeleteChannel(
BuildContext context,
MeshCoreConnector connector,
ChannelMessageStore channelMessageStore,
Channel channel,
) {
showDialog(
context: context,
builder: (dialogContext) => AlertDialog(
title: Text(dialogContext.l10n.channels_deleteChannel),
content: Text(
dialogContext.l10n.channels_deleteChannelConfirm(channel.name),
),
actions: [
TextButton(
onPressed: () => Navigator.pop(dialogContext),
child: Text(dialogContext.l10n.common_cancel),
),
TextButton(
onPressed: () async {
Navigator.pop(dialogContext);
try {
await connector.deleteChannel(channel.index);
await channelMessageStore.clearChannelMessages(channel.index);
if (!context.mounted) return;
showDismissibleSnackBar(
context,
content: Text(
context.l10n.channels_channelDeleted(channel.name),
),
);
} catch (e, st) {
if (!context.mounted) return;
showDismissibleSnackBar(
context,
content: Text(
context.l10n.channels_channelDeleteFailed(channel.name),
),
);
// Preserve existing logging (if it was there)
debugPrint('Failed to delete channel: $e\n$st');
}
},
child: Text(
dialogContext.l10n.common_delete,
style: TextStyle(
color: Theme.of(dialogContext).colorScheme.error,
),
),
),
],
),
);
}
void _addPublicChannel(BuildContext context, MeshCoreConnector connector) {
final psk = Channel.parsePskHex(Channel.publicChannelPsk);
connector.setChannel(0, context.l10n.channels_public, psk);
showDismissibleSnackBar(
context,
content: Text(context.l10n.channels_publicChannelAdded),
);
}
int _findNextAvailableIndex(List<Channel> channels, int maxChannels) {
final usedIndices = channels.map((c) => c.index).toSet();
for (int i = 0; i < maxChannels; i++) {
if (!usedIndices.contains(i)) return i;
}
return 0;
}
void _showManageCommunitiesDialog(BuildContext context) {
showMeshSheet(
context,
builder: (sheetContext) => DraggableScrollableSheet(
initialChildSize: 0.5,
minChildSize: 0.3,
maxChildSize: 0.9,
expand: false,
builder: (_, scrollController) => Column(
children: [
BottomSheetHeader(
title: sheetContext.l10n.community_manageCommunities,
),
const Divider(height: 1),
Expanded(
child: _communities.isEmpty
? Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Icon(
Icons.groups_outlined,
size: 64,
color: Theme.of(sheetContext)
.colorScheme
.onSurfaceVariant
.withValues(alpha: 0.6),
),
const SizedBox(height: 16),
Text(
sheetContext.l10n.community_noCommunities,
style: TextStyle(
fontSize: 16,
color: Theme.of(
sheetContext,
).colorScheme.onSurfaceVariant,
),
),
const SizedBox(height: 8),
Text(
sheetContext.l10n.community_scanOrCreate,
style: TextStyle(
fontSize: 14,
color: Theme.of(sheetContext)
.colorScheme
.onSurfaceVariant
.withValues(alpha: 0.8),
),
textAlign: TextAlign.center,
),
],
),
)
: ListView.builder(
controller: scrollController,
itemCount: _communities.length,
itemBuilder: (context, index) {
final community = _communities[index];
return ListTile(
leading: CircleAvatar(
backgroundColor: MeshPalette.magentaBg,
child: const Icon(
Icons.groups,
color: MeshPalette.magenta,
),
),
title: Text(community.name),
subtitle: Text(
context.l10n.channels_communityShortId(
community.shortCommunityId,
),
style: TextStyle(
fontSize: 12,
color: Theme.of(
context,
).colorScheme.onSurfaceVariant,
),
),
trailing: PopupMenuButton<String>(
onSelected: (value) {
Navigator.pop(sheetContext);
// Use the screen's context: the sheet item's
// context is deactivated once the sheet pops.
if (value == 'share') {
_showCommunityQrDialog(this.context, community);
} else if (value == 'leave') {
_confirmLeaveCommunity(this.context, community);
}
},
itemBuilder: (context) => [
PopupMenuItem(
value: 'share',
child: Row(
children: [
const Icon(Icons.qr_code),
const SizedBox(width: 12),
Text(context.l10n.community_showQr),
],
),
),
PopupMenuItem(
value: 'leave',
child: Row(
children: [
Icon(
Icons.exit_to_app,
color: Theme.of(
context,
).colorScheme.error,
),
const SizedBox(width: 12),
Text(
context.l10n.community_delete,
style: TextStyle(
color: Theme.of(
context,
).colorScheme.error,
),
),
],
),
),
],
),
onTap: () {
Navigator.pop(sheetContext);
_showCommunityQrDialog(context, community);
},
);
},
),
),
],
),
),
);
}
void _showCommunityQrDialog(BuildContext context, Community community) {
QrCodeShareDialog.show(
context: context,
data: community.toQrJson(),
title: context.l10n.community_qrTitle,
instructions: context.l10n.community_qrInstructions(community.name),
embeddedImage: Image.asset(
'assets/images/mesh-icon.png',
width: 40,
height: 40,
),
);
}
void _confirmLeaveCommunity(BuildContext context, Community community) {
final connector = context.read<MeshCoreConnector>();
// Find all channels that belong to this community
List<Channel> communityChannels = [];
final publicPskHex = Channel.formatPskHex(
community.deriveCommunityPublicPsk(),
);
for (final channel in connector.channels) {
// Check if it's the public channel
if (channel.pskHex == publicPskHex) {
communityChannels.add(channel);
continue;
}
// Check if it's a hashtag channel
for (final hashtag in community.hashtagChannels) {
final hashtagPskHex = Channel.formatPskHex(
community.deriveCommunityHashtagPsk(hashtag),
);
if (channel.pskHex == hashtagPskHex) {
communityChannels.add(channel);
break;
}
}
}
final channelCount = communityChannels.length;
_communityStore.setPublicKeyHex = connector.selfPublicKeyHex;
showDialog(
context: context,
builder: (dialogContext) => AlertDialog(
title: Text(dialogContext.l10n.community_delete),
content: Text(
channelCount > 0
? '${dialogContext.l10n.community_deleteConfirm(community.name)}\n\n${dialogContext.l10n.community_deleteChannelsWarning(channelCount)}'
: dialogContext.l10n.community_deleteConfirm(community.name),
),
actions: [
TextButton(
onPressed: () => Navigator.pop(dialogContext),
child: Text(dialogContext.l10n.common_cancel),
),
TextButton(
onPressed: () async {
Navigator.pop(dialogContext);
// Delete all community channels from the device
for (final channel in communityChannels) {
await connector.deleteChannel(channel.index);
}
// Remove community from store
await _communityStore.removeCommunity(community.id);
_loadCommunities();
if (context.mounted) {
showDismissibleSnackBar(
context,
content: Text(context.l10n.community_deleted(community.name)),
);
}
},
child: Text(
dialogContext.l10n.community_delete,
style: TextStyle(
color: Theme.of(dialogContext).colorScheme.error,
),
),
),
],
),
);
}
}