mirror of
https://github.com/zjs81/meshcore-open.git
synced 2026-08-03 22:43:00 +10:00
feat: Add community management features with QR code scanning
- Implement Community model for managing community data, including secret handling and PSK derivation. - Create CommunityQrScannerScreen for scanning and joining communities via QR codes. - Develop CommunityStore for persisting community data using SharedPreferences. - Introduce QrCodeDisplay widget for displaying QR codes with customizable options. - Add QrScannerWidget for reusable QR code scanning functionality with validation and controls.
This commit is contained in:
zjs81
@@ -0,0 +1,245 @@
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import 'package:flutter/material.dart';
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import 'package:provider/provider.dart';
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import 'package:uuid/uuid.dart';
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import '../connector/meshcore_connector.dart';
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import '../l10n/l10n.dart';
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import '../models/community.dart';
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import '../storage/community_store.dart';
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import '../widgets/qr_scanner_widget.dart';
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/// Screen for scanning community QR codes to join communities.
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///
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/// After successful scan, the user can:
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/// 1. Join the community (saves to local storage)
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/// 2. Optionally add the Community Public Channel to the device
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class CommunityQrScannerScreen extends StatefulWidget {
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const CommunityQrScannerScreen({super.key});
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@override
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State<CommunityQrScannerScreen> createState() =>
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_CommunityQrScannerScreenState();
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}
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class _CommunityQrScannerScreenState extends State<CommunityQrScannerScreen> {
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final CommunityStore _communityStore = CommunityStore();
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bool _isProcessing = false;
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@override
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Widget build(BuildContext context) {
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return Scaffold(
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appBar: AppBar(
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title: Text(context.l10n.community_scanQr),
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centerTitle: true,
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),
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body: _isProcessing
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? const Center(child: CircularProgressIndicator())
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: QrScannerWidget(
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onScanned: (data) => _handleScannedData(context, data),
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validator: Community.isValidQrData,
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onValidationFailed: (_) => _showInvalidQrError(context),
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instructions: context.l10n.community_scanInstructions,
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),
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);
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}
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Future<void> _handleScannedData(BuildContext context, String data) async {
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if (_isProcessing) return;
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setState(() {
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_isProcessing = true;
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});
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try {
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// Parse the community data
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final community = Community.fromQrData(const Uuid().v4(), data);
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// Check if this community already exists
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final existing = await _communityStore.findByCommunityId(
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community.communityId,
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);
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if (existing != null) {
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if (context.mounted) {
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_showAlreadyMemberDialog(context, existing);
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}
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return;
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}
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// Show confirmation dialog
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if (context.mounted) {
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await _showJoinConfirmationDialog(context, community);
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}
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} catch (e) {
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if (context.mounted) {
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ScaffoldMessenger.of(context).showSnackBar(
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SnackBar(
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content: Text(context.l10n.community_invalidQrCode),
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backgroundColor: Colors.red,
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),
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);
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}
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} finally {
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if (mounted) {
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setState(() {
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_isProcessing = false;
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});
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}
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}
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}
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void _showInvalidQrError(BuildContext context) {
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ScaffoldMessenger.of(context).showSnackBar(
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SnackBar(
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content: Text(context.l10n.community_invalidQrCode),
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backgroundColor: Colors.orange,
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duration: const Duration(seconds: 2),
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),
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);
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}
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void _showAlreadyMemberDialog(BuildContext context, Community community) {
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showDialog(
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context: context,
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builder: (dialogContext) => AlertDialog(
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title: Text(context.l10n.community_alreadyMember),
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content: Text(
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context.l10n.community_alreadyMemberMessage(community.name),
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),
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actions: [
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TextButton(
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onPressed: () {
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Navigator.pop(dialogContext);
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Navigator.pop(context);
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},
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child: Text(context.l10n.common_ok),
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),
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],
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),
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);
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}
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Future<void> _showJoinConfirmationDialog(
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BuildContext context,
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Community community,
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) async {
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bool addPublicChannel = true;
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final result = await showDialog<bool>(
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context: context,
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builder: (dialogContext) => StatefulBuilder(
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builder: (dialogContext, setDialogState) => AlertDialog(
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title: Text(context.l10n.community_joinTitle),
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content: Column(
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mainAxisSize: MainAxisSize.min,
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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Text(context.l10n.community_joinConfirmation(community.name)),
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const SizedBox(height: 16),
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Row(
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children: [
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Icon(
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Icons.groups,
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color: Theme.of(dialogContext).colorScheme.primary,
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),
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const SizedBox(width: 12),
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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(
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community.name,
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style: const TextStyle(fontWeight: FontWeight.bold),
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),
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Text(
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'ID: ${community.shortCommunityId}...',
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style: TextStyle(
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fontSize: 12,
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color: Colors.grey[600],
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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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const SizedBox(height: 16),
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const Divider(),
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const SizedBox(height: 8),
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CheckboxListTile(
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value: addPublicChannel,
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onChanged: (value) {
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setDialogState(() {
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addPublicChannel = value ?? true;
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});
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},
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title: Text(context.l10n.community_addPublicChannel),
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subtitle: Text(context.l10n.community_addPublicChannelHint),
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controlAffinity: ListTileControlAffinity.leading,
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contentPadding: EdgeInsets.zero,
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),
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],
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),
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actions: [
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TextButton(
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onPressed: () => Navigator.pop(dialogContext, false),
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child: Text(context.l10n.common_cancel),
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),
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FilledButton(
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onPressed: () => Navigator.pop(dialogContext, true),
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child: Text(context.l10n.community_join),
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),
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],
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),
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),
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);
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if (result == true && context.mounted) {
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await _joinCommunity(context, community, addPublicChannel);
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} else if (context.mounted) {
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// User cancelled - go back
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Navigator.pop(context);
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}
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}
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Future<void> _joinCommunity(
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BuildContext context,
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Community community,
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bool addPublicChannel,
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) async {
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// Save community to local storage
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await _communityStore.addCommunity(community);
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// Optionally add the community public channel to the device
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if (addPublicChannel && context.mounted) {
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final connector = context.read<MeshCoreConnector>();
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final nextIndex = _findNextAvailableChannelIndex(connector);
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if (nextIndex != null) {
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final psk = community.deriveCommunityPublicPsk();
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final channelName = '${community.name} Public';
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connector.setChannel(nextIndex, channelName, psk);
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}
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}
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if (context.mounted) {
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ScaffoldMessenger.of(context).showSnackBar(
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SnackBar(
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content: Text(context.l10n.community_joined(community.name)),
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backgroundColor: Colors.green,
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),
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);
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// Return to previous screen
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Navigator.pop(context, community);
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}
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}
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int? _findNextAvailableChannelIndex(MeshCoreConnector connector) {
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final usedIndices = connector.channels.map((c) => c.index).toSet();
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for (int i = 0; i < connector.maxChannels; i++) {
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if (!usedIndices.contains(i)) return i;
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}
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return null;
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}
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}
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