ente/lib/services/notification_service.dart

import 'dart:io';

import 'package:flutter_local_notifications/flutter_local_notifications.dart';

class NotificationService {
  static final NotificationService instance =
      NotificationService._privateConstructor();

  NotificationService._privateConstructor();
  final FlutterLocalNotificationsPlugin _flutterLocalNotificationsPlugin =
      FlutterLocalNotificationsPlugin();

  Future<void> init() async {
    if (!Platform.isAndroid) {
      return;
    }
    const AndroidInitializationSettings initializationSettingsAndroid =
        AndroidInitializationSettings('notification_icon');
    const InitializationSettings initializationSettings =
        InitializationSettings(
      android: initializationSettingsAndroid,
    );
    await _flutterLocalNotificationsPlugin.initialize(
      initializationSettings,
    );
    final implementation =
        _flutterLocalNotificationsPlugin.resolvePlatformSpecificImplementation<
            AndroidFlutterLocalNotificationsPlugin>();
    if (implementation != null) {
      implementation.requestNotificationsPermission();
    }
  }

  Future<void> showNotification(String title, String message) async {
    if (!Platform.isAndroid) {
      return;
    }
    const AndroidNotificationDetails androidPlatformChannelSpecifics =
        AndroidNotificationDetails(
      'io.ente.auth',
      'auth',
      channelDescription: 'auth alerts',
      importance: Importance.max,
      priority: Priority.high,
      showWhen: false,
    );
    const NotificationDetails platformChannelSpecifics =
        NotificationDetails(android: androidPlatformChannelSpecifics);
    await _flutterLocalNotificationsPlugin.show(
      0,
      title,
      message,
      platformChannelSpecifics,
    );
  }
}