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https://github.com/dz0ny/meshcore-sar.git
synced 2026-08-11 16:30:28 +00:00
feat: Implement notification service for SAR messages and add localization support
This commit is contained in:
Janez T
353
lib/services/notification_service.dart
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353
lib/services/notification_service.dart
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@@ -0,0 +1,353 @@
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import 'package:flutter/material.dart';
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import 'package:flutter_local_notifications/flutter_local_notifications.dart';
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import 'package:timezone/timezone.dart' as tz;
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import 'package:timezone/data/latest_all.dart' as tz;
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import '../models/sar_marker.dart';
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import '../l10n/app_localizations.dart';
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/// Notification Service - manages urgent notifications for SAR messages
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/// Provides critical alert functionality for SAR marker events
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class NotificationService {
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static final NotificationService _instance = NotificationService._internal();
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factory NotificationService() => _instance;
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NotificationService._internal();
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final FlutterLocalNotificationsPlugin _notificationsPlugin =
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FlutterLocalNotificationsPlugin();
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bool _isInitialized = false;
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bool _permissionGranted = false;
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// Notification IDs
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static const int _sarNotificationId = 1000;
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// Notification channels
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static const String _urgentChannelId = 'sar_urgent';
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static const String _urgentChannelName = 'SAR Urgent Alerts';
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static const String _urgentChannelDescription =
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'Critical alerts for SAR markers (found persons, fires, staging areas)';
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/// Initialize notification service
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Future<void> initialize() async {
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if (_isInitialized) return;
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try {
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print('📬 [NotificationService] Initializing...');
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// Initialize timezone data
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tz.initializeTimeZones();
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// Android initialization settings
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const androidSettings = AndroidInitializationSettings('@mipmap/ic_launcher');
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// iOS initialization settings
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final darwinSettings = DarwinInitializationSettings(
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requestAlertPermission: true,
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requestBadgePermission: true,
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requestSoundPermission: true,
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requestCriticalPermission: true, // For urgent SAR notifications
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);
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// Combined initialization settings
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final initSettings = InitializationSettings(
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android: androidSettings,
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iOS: darwinSettings,
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);
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// Initialize plugin
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await _notificationsPlugin.initialize(
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initSettings,
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onDidReceiveNotificationResponse: _onNotificationResponse,
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);
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// Request permissions
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await _requestPermissions();
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// Create notification channels (Android)
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await _createNotificationChannels();
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_isInitialized = true;
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print('✅ [NotificationService] Initialized successfully');
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print(' Permission granted: $_permissionGranted');
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} catch (e) {
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print('❌ [NotificationService] Initialization error: $e');
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}
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}
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/// Request notification permissions
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Future<void> _requestPermissions() async {
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try {
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// iOS permissions
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final iosPlugin = _notificationsPlugin
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.resolvePlatformSpecificImplementation<IOSFlutterLocalNotificationsPlugin>();
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if (iosPlugin != null) {
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final granted = await iosPlugin.requestPermissions(
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alert: true,
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badge: true,
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sound: true,
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critical: true, // Request critical alert permission for urgent SAR notifications
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);
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_permissionGranted = granted ?? false;
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print('📱 [NotificationService] iOS permissions granted: $_permissionGranted');
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}
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// Android 13+ permissions
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final androidPlugin = _notificationsPlugin
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.resolvePlatformSpecificImplementation<AndroidFlutterLocalNotificationsPlugin>();
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if (androidPlugin != null) {
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final granted = await androidPlugin.requestNotificationsPermission();
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_permissionGranted = granted ?? false;
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print('🤖 [NotificationService] Android permissions granted: $_permissionGranted');
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}
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} catch (e) {
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print('⚠️ [NotificationService] Error requesting permissions: $e');
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}
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}
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/// Create notification channels for Android
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Future<void> _createNotificationChannels() async {
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try {
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final androidPlugin = _notificationsPlugin
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.resolvePlatformSpecificImplementation<AndroidFlutterLocalNotificationsPlugin>();
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if (androidPlugin == null) return;
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// Urgent SAR channel with maximum priority
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const urgentChannel = AndroidNotificationChannel(
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_urgentChannelId,
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_urgentChannelName,
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description: _urgentChannelDescription,
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importance: Importance.max,
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playSound: true,
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enableVibration: true,
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enableLights: true,
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showBadge: true,
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sound: RawResourceAndroidNotificationSound('notification'),
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);
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await androidPlugin.createNotificationChannel(urgentChannel);
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print('✅ [NotificationService] Created urgent notification channel');
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} catch (e) {
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print('⚠️ [NotificationService] Error creating channels: $e');
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}
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}
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/// Handle notification tap (foreground)
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void _onNotificationResponse(NotificationResponse response) {
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print('🔔 [NotificationService] Notification tapped: ${response.payload}');
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// TODO: Navigate to map tab and show SAR marker
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// This would require a callback to the app layer
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}
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/// Show urgent notification for SAR marker
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Future<void> showSarNotification({
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required SarMarkerType type,
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required String senderName,
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required String coordinates,
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String? notes,
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AppLocalizations? localizations,
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}) async {
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if (!_isInitialized) {
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print('⚠️ [NotificationService] Not initialized, skipping notification');
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return;
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}
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if (!_permissionGranted) {
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print('⚠️ [NotificationService] Permission not granted, skipping notification');
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return;
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}
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try {
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// Generate unique notification ID based on timestamp
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final notificationId = _sarNotificationId + (DateTime.now().millisecondsSinceEpoch % 1000);
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// Build notification title and body
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final title = _buildNotificationTitle(type, localizations);
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final body = _buildNotificationBody(
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type: type,
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senderName: senderName,
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coordinates: coordinates,
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notes: notes,
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localizations: localizations,
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);
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// Android notification details
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final androidDetails = AndroidNotificationDetails(
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_urgentChannelId,
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_urgentChannelName,
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channelDescription: _urgentChannelDescription,
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importance: Importance.max,
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priority: Priority.high,
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ticker: title,
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playSound: true,
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enableVibration: true,
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enableLights: true,
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color: Color(_getNotificationColor(type)),
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colorized: true,
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showWhen: true,
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when: DateTime.now().millisecondsSinceEpoch,
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category: AndroidNotificationCategory.alarm, // High priority category
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fullScreenIntent: true, // Show as full screen on some devices
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styleInformation: BigTextStyleInformation(
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body,
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contentTitle: title,
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summaryText: _getSummaryText(type, localizations),
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),
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);
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// iOS notification details
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final darwinDetails = DarwinNotificationDetails(
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presentAlert: true,
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presentBadge: true,
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presentSound: true,
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sound: 'default',
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badgeNumber: 1,
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threadIdentifier: 'sar_markers',
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categoryIdentifier: 'SAR_ALERT',
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interruptionLevel: InterruptionLevel.critical, // Critical alert (bypasses silent mode)
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);
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// Combined notification details
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final notificationDetails = NotificationDetails(
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android: androidDetails,
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iOS: darwinDetails,
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);
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// Show notification
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await _notificationsPlugin.show(
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notificationId,
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title,
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body,
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notificationDetails,
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payload: 'sar:${type.name}:$coordinates',
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);
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print('✅ [NotificationService] Showed SAR notification: $title');
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print(' Type: ${type.displayName}');
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print(' Sender: $senderName');
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print(' Coordinates: $coordinates');
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} catch (e) {
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print('❌ [NotificationService] Error showing notification: $e');
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}
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}
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/// Build notification title based on SAR marker type
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String _buildNotificationTitle(SarMarkerType type, AppLocalizations? localizations) {
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if (localizations == null) {
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return '🚨 ${type.displayName} Detected';
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}
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switch (type) {
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case SarMarkerType.foundPerson:
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return '🚨 ${localizations.sarMarkerFoundPerson}';
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case SarMarkerType.fire:
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return '🚨 ${localizations.sarMarkerFire}';
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case SarMarkerType.stagingArea:
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return '🚨 ${localizations.sarMarkerStagingArea}';
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case SarMarkerType.object:
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return '🚨 ${localizations.sarMarkerObject}';
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case SarMarkerType.unknown:
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return '🚨 SAR Alert';
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}
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}
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/// Build notification body with all details
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String _buildNotificationBody({
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required SarMarkerType type,
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required String senderName,
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required String coordinates,
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String? notes,
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AppLocalizations? localizations,
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}) {
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final buffer = StringBuffer();
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// Sender
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if (localizations != null) {
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buffer.write('${localizations.from}: $senderName\n');
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buffer.write('${localizations.coordinates}: $coordinates');
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} else {
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buffer.write('From: $senderName\n');
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buffer.write('Coordinates: $coordinates');
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}
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// Optional notes
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if (notes != null && notes.isNotEmpty) {
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buffer.write('\n\n$notes');
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}
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return buffer.toString();
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}
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/// Get summary text for notification
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String _getSummaryText(SarMarkerType type, AppLocalizations? localizations) {
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if (localizations == null) {
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return 'Tap to view on map';
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}
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return localizations.tapToViewOnMap;
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}
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/// Get notification color based on SAR marker type
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int _getNotificationColor(SarMarkerType type) {
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// Return ARGB color codes
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switch (type) {
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case SarMarkerType.foundPerson:
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return 0xFF4CAF50; // Green
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case SarMarkerType.fire:
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return 0xFFF44336; // Red
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case SarMarkerType.stagingArea:
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return 0xFFFF9800; // Orange
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case SarMarkerType.object:
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return 0xFF2196F3; // Blue
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case SarMarkerType.unknown:
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return 0xFF9E9E9E; // Gray
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}
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}
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/// Cancel all notifications
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Future<void> cancelAll() async {
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try {
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await _notificationsPlugin.cancelAll();
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print('✅ [NotificationService] Cancelled all notifications');
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} catch (e) {
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print('❌ [NotificationService] Error canceling notifications: $e');
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}
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}
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/// Cancel specific notification
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Future<void> cancel(int id) async {
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try {
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await _notificationsPlugin.cancel(id);
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print('✅ [NotificationService] Cancelled notification: $id');
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} catch (e) {
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print('❌ [NotificationService] Error canceling notification: $e');
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}
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}
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/// Check if notifications are enabled
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Future<bool> areNotificationsEnabled() async {
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try {
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final androidPlugin = _notificationsPlugin
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.resolvePlatformSpecificImplementation<AndroidFlutterLocalNotificationsPlugin>();
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if (androidPlugin != null) {
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final enabled = await androidPlugin.areNotificationsEnabled();
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return enabled ?? false;
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}
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// For iOS, assume enabled if permission was granted
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return _permissionGranted;
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} catch (e) {
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print('⚠️ [NotificationService] Error checking notification status: $e');
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return false;
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}
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}
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/// Get pending notifications
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Future<List<PendingNotificationRequest>> getPendingNotifications() async {
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try {
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return await _notificationsPlugin.pendingNotificationRequests();
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} catch (e) {
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print('⚠️ [NotificationService] Error getting pending notifications: $e');
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return [];
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}
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}
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}
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