diplomatic-quarter/lib/uitl/LocalNotification.dart

import 'dart:math';
import 'dart:typed_data';
import 'dart:ui';

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

final FlutterLocalNotificationsPlugin flutterLocalNotificationsPlugin = FlutterLocalNotificationsPlugin();

class LocalNotification {
  Function(String payload) _onNotificationClick;
  static LocalNotification _instance;

  static LocalNotification getInstance() {
    return _instance;
  }

  static init({Function(String payload) onNotificationClick}) {
    if (_instance == null) {
      _instance = LocalNotification();
      _instance._onNotificationClick = onNotificationClick;
      _instance._initialize();
    } else {
      // assert(false,(){
      //   //TODO fix it
      //   "LocalNotification Already Initialized";
      // });
    }
  }

  _initialize() async {
    try {
      var initializationSettingsAndroid = new AndroidInitializationSettings('app_icon');
      var initializationSettingsIOS = DarwinInitializationSettings(onDidReceiveLocalNotification: null);
      var initializationSettings = InitializationSettings(android: initializationSettingsAndroid, iOS: initializationSettingsIOS);
      await flutterLocalNotificationsPlugin.initialize(
        initializationSettings,
        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,
      );
    } catch (ex) {}
    //   flutterLocalNotificationsPlugin.initialize(initializationSettings, 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;
    //   },}
    //
    // ,
    //
    // );
  }

  void notificationTapBackground(NotificationResponse notificationResponse) {
    // ignore: avoid_print
    print('notification(${notificationResponse.id}) action tapped: '
        '${notificationResponse.actionId} with'
        ' payload: ${notificationResponse.payload}');
    if (notificationResponse.input?.isNotEmpty ?? false) {
      // ignore: avoid_print
      print('notification action tapped with input: ${notificationResponse.input}');
    }
  }

  var _random = new Random();

  _randomNumber({int from = 100000}) {
    return _random.nextInt(from);
  }

  _vibrationPattern() {
    var vibrationPattern = Int64List(4);
    vibrationPattern[0] = 0;
    vibrationPattern[1] = 1000;
    vibrationPattern[2] = 5000;
    vibrationPattern[3] = 2000;

    return vibrationPattern;
  }

  Future showNow({@required String title, @required String subtitle, String payload}) {
    Future.delayed(Duration(seconds: 1)).then((result) async {
      var androidPlatformChannelSpecifics = AndroidNotificationDetails('com.hmg.local_notification', 'HMG',
          channelDescription: 'HMG', importance: Importance.max, priority: Priority.high, ticker: 'ticker', vibrationPattern: _vibrationPattern());
      var iOSPlatformChannelSpecifics = DarwinNotificationDetails();
      var platformChannelSpecifics = NotificationDetails(android: androidPlatformChannelSpecifics, iOS: iOSPlatformChannelSpecifics);
      await flutterLocalNotificationsPlugin.show(_randomNumber(), title, subtitle, platformChannelSpecifics, payload: payload).catchError((err) {
        print(err);
      });
    });
  }

  Future scheduleNotification({@required DateTime scheduledNotificationDateTime, @required String title, @required String description}) async {
    ///vibrationPattern
    var vibrationPattern = Int64List(4);
    vibrationPattern[0] = 0;
    vibrationPattern[1] = 1000;
    vibrationPattern[2] = 5000;
    vibrationPattern[3] = 2000;

    var androidPlatformChannelSpecifics = AndroidNotificationDetails('active-prescriptions', 'ActivePrescriptions',
        channelDescription: 'ActivePrescriptionsDescription',
        // icon: 'secondary_icon',
        sound: RawResourceAndroidNotificationSound('slow_spring_board'),

        ///change it to be as ionic
        // largeIcon: DrawableResourceAndroidBitmap('sample_large_icon'),///change it to be as ionic
        vibrationPattern: vibrationPattern,
        enableLights: true,
        color: const Color.fromARGB(255, 255, 0, 0),
        ledColor: const Color.fromARGB(255, 255, 0, 0),
        ledOnMs: 1000,
        ledOffMs: 500);
    var iOSPlatformChannelSpecifics = DarwinNotificationDetails(sound: 'slow_spring_board.aiff');

    // /change it to be as ionic
    var platformChannelSpecifics = NotificationDetails(android: androidPlatformChannelSpecifics, iOS: iOSPlatformChannelSpecifics);
    await flutterLocalNotificationsPlugin.schedule(0, title, description, scheduledNotificationDateTime, platformChannelSpecifics);
  }

  ///Repeat notification every day at approximately 10:00:00 am
  Future showDailyAtTime() async {
    var time = Time(10, 0, 0);
    var androidPlatformChannelSpecifics = AndroidNotificationDetails('repeatDailyAtTime channel id', 'repeatDailyAtTime channel name', channelDescription: 'repeatDailyAtTime description');
    var iOSPlatformChannelSpecifics = DarwinNotificationDetails();
    // var platformChannelSpecifics = NotificationDetails(
    //     androidPlatformChannelSpecifics, iOSPlatformChannelSpecifics);
    // await flutterLocalNotificationsPlugin.showDailyAtTime(
    //     0,
    //     'show daily title',
    //     'Daily notification shown at approximately ${_toTwoDigitString(time.hour)}:${_toTwoDigitString(time.minute)}:${_toTwoDigitString(time.second)}',
    //     time,
    //     platformChannelSpecifics);
  }

  ///Repeat notification weekly on Monday at approximately 10:00:00 am
  Future showWeeklyAtDayAndTime() async {
    var time = Time(10, 0, 0);
    var androidPlatformChannelSpecifics = AndroidNotificationDetails('show weekly channel id', 'show weekly channel name', channelDescription: 'show weekly description');
    var iOSPlatformChannelSpecifics = DarwinNotificationDetails();
    // var platformChannelSpecifics = NotificationDetails(
    //     androidPlatformChannelSpecifics, iOSPlatformChannelSpecifics);
    // await flutterLocalNotificationsPlugin.showWeeklyAtDayAndTime(
    //     0,
    //     'show weekly title',
    //     'Weekly notification shown on Monday at approximately ${_toTwoDigitString(time.hour)}:${_toTwoDigitString(time.minute)}:${_toTwoDigitString(time.second)}',
    //     Day.Monday,
    //     time,
    //     platformChannelSpecifics);
  }

  String _toTwoDigitString(int value) {
    return value.toString().padLeft(2, '0');
  }

  Future cancelNotification() async {
    await flutterLocalNotificationsPlugin.cancel(0);
  }

  Future cancelAllNotifications() async {
    await flutterLocalNotificationsPlugin.cancelAll();
  }
}