together_mobile/lib/notification_api.dart

import 'dart:async';

import 'package:flutter/services.dart';
import 'package:flutter_local_notifications/flutter_local_notifications.dart';

/// Requesting permissions
final FlutterLocalNotificationsPlugin flutterLocalNotificationsPlugin =
    FlutterLocalNotificationsPlugin();

/// Streams are created so that app can respond to notification-related events
/// since the plugin is initialised in the `main` function
final StreamController<ReceivedNotification?>
    didReceiveLocalNotificationStream =
    StreamController<ReceivedNotification>.broadcast();

final StreamController<String?> selectNotificationStream =
    StreamController<String?>.broadcast();

const MethodChannel platform =
    MethodChannel('dexterx.dev/flutter_local_notifications_example');

const String portName = 'notification_send_port';

class ReceivedNotification {
  final int id;
  final String? title;
  final String? body;
  final String? payload;

  const ReceivedNotification({
    required this.id,
    required this.title,
    required this.body,
    required this.payload,
  });
}

String? selectedNotificationPayload;

/// A notification action which triggers a url launch event
const String urlLanunchActionId = 'id_1';

/// A notification action which triggers a App navigation event
const String navigationActionId = 'id-3';

/// Defines a iOS/MacOS notification category for text input actions.
const String darwinNotificationCategoryText = 'textCategory';

/// Defines a iOS/MacOS notification category for text input actions.
const String darwinNotificationCategoryPlain = 'plainCategory';

@pragma('vm:entry-point')
void notificationTapBackground(NotificationResponse notificationResponse) {
  print('notification(${notificationResponse.id}) action tapped: '
      '${notificationResponse.actionId} with'
      ' payload: ${notificationResponse.payload}');

  if (notificationResponse.input?.isNotEmpty ?? false) {
    print('notification action tapped with input: ${notificationResponse.input}');
  }
}