ftc_patient_app/lib/utilities/notification_util.dart

import 'dart:convert';
import 'dart:io';
import 'package:flutter/foundation.dart';
import 'package:flutter_local_notifications/flutter_local_notifications.dart';
import 'fcm_notifications.dart';
import 'extensions/custom_extensions.dart';

const String packageName = "com.inajam.app";
const notificationChannelId = packageName;
const notificationChannelName = "inajam";
const notificationChannelDescription = "In A Jam";

final FlutterLocalNotificationsPlugin flutterLocalNotificationsPlugin =
    FlutterLocalNotificationsPlugin();

//for SDK version 33
Future<void> requestNotificationPermissions() async {
  if (Platform.isIOS || Platform.isMacOS) {
    await flutterLocalNotificationsPlugin
        .resolvePlatformSpecificImplementation<
            IOSFlutterLocalNotificationsPlugin>()
        ?.requestPermissions(
          alert: true,
          badge: true,
          sound: true,
          critical: true,
        );
  } else if (Platform.isAndroid) {
    final AndroidFlutterLocalNotificationsPlugin? androidImplementation =
        flutterLocalNotificationsPlugin.resolvePlatformSpecificImplementation<
            AndroidFlutterLocalNotificationsPlugin>();

    await androidImplementation?.requestNotificationsPermission();
  }
}

const AndroidInitializationSettings initializationSettingsAndroid =
    AndroidInitializationSettings('@drawable/notification_icon');

const DarwinInitializationSettings initializationSettingsDarwin =
    DarwinInitializationSettings(
        // requestAlertPermission: true,
        // requestBadgePermission: true,
        // requestSoundPermission: true,
        // onDidReceiveLocalNotification:
        //     (int id, String? title, String? body, String? payload) async {
        //   didReceiveLocalNotificationStream.add(
        //     ReceivedNotification(
        //       id: id,
        //       title: title,
        //       body: body,
        //       payload: payload,
        //     ),
        //   );
        // },
        // notificationCategories: darwinNotificationCategories,
        );

const InitializationSettings initializationSettings = InitializationSettings(
  android: initializationSettingsAndroid,
  iOS: initializationSettingsDarwin,
  macOS: initializationSettingsDarwin,
);

void selectNotification(String? payload) async {
  debugPrint('selected notification payload: $payload');
  debugPrint(
      'is selected notification payload null or empty: ${payload.isNotNullOrEmpty()}');

  if (payload.isNotNullOrEmpty()) {
    var messageData = jsonDecode(payload!);
    handleAppNotification(messageData);
  }
}

//-----------------------
//-----------------------
//-----------------------
class NotificationUtils {
  NotificationUtils._();

  static NotificationDetails? platformChannelSpecifics;
  static AndroidNotificationChannel? channel;
  static AndroidNotificationDetails? androidPlatformChannelSpecifics;

  static Future init() async {
    try {
      await flutterLocalNotificationsPlugin.initialize(initializationSettings,
          onDidReceiveNotificationResponse: (response) =>
              selectNotification(response.payload)

          // onDidReceiveNotificationResponse:
          //     (NotificationResponse notificationResponse) {
          //   switch (notificationResponse.notificationResponseType) {
          //     case NotificationResponseType.selectedNotification:
          //       selectNotificationStream.add(notificationResponse.payload);
          //       break;
          //     case NotificationResponseType.selectedNotificationAction:
          //       if (notificationResponse.actionId == navigationActionId) {
          //         selectNotificationStream.add(notificationResponse.payload);
          //       }
          //       break;
          //   }
          // },
          // onDidReceiveBackgroundNotificationResponse: notificationTapBackground,
          );

      platformChannelSpecifics = await getChannelSpecifics();
    } catch (e) {
      debugPrint("NotificationUtils: ${e.toString()}");
    }
  }

  static Future<NotificationDetails> getChannelSpecifics(
      [int? badgeNumber]) async {
    if (Platform.isAndroid) {
      channel = await _getAndroidDefaultChannel(notificationChannelId,
          notificationChannelName, notificationChannelDescription);
    }
    androidPlatformChannelSpecifics ??= AndroidNotificationDetails(
        notificationChannelId, notificationChannelName,
        channelDescription: notificationChannelDescription,
        importance: channel?.importance ?? Importance.max,
        priority: Priority.high,
        enableVibration: true,
        playSound: false);

    int badgeNum = 0;

    //Todo
    // try {
    //   badgeNum =
    //       badgeNumber ?? AppProviderController.instance.notificationCount();
    //   print("badgeNum: $badgeNum");
    // } catch (e) {}

    var iOSPlatformChannelSpecifics = DarwinNotificationDetails(
      presentSound: true,
      presentBadge: true,
      presentAlert: true,
      badgeNumber: badgeNum,
    );
    return NotificationDetails(
      android: androidPlatformChannelSpecifics,
      iOS: iOSPlatformChannelSpecifics,
    );
  }

  static Future<void> showDefaultNotification(
      {required String title,
      required String body,
      Map<String, dynamic>? payload,
      int? badgeNumber}) async {
    platformChannelSpecifics = await getChannelSpecifics(badgeNumber);
    await flutterLocalNotificationsPlugin.show(
      10,
      title,
      body,
      platformChannelSpecifics,
      payload: (payload.isNullOrEmpty()) ? null : jsonEncode(payload!),
    );
  }

  static Future<AndroidNotificationChannel> _getAndroidDefaultChannel(
    String channelId,
    String channelName,
    String? channelDescription,
  ) async {
    AndroidNotificationChannel channel = AndroidNotificationChannel(
      channelId,
      channelName,
      description: channelDescription,
      importance: Importance.max,
      enableVibration: true,
      playSound: false,
    );
    await flutterLocalNotificationsPlugin
        .resolvePlatformSpecificImplementation<
            AndroidFlutterLocalNotificationsPlugin>()
        ?.createNotificationChannel(channel);
    return channel;
  }
}