Added Notifications

lib/main.dart

@@ -1,7 +1,15 @@
 import 'package:flutter/material.dart';
 import 'package:smoke_cess_app/pages/main_page.dart';
+import 'package:smoke_cess_app/service/notification_service.dart';
 
-void main() => runApp(const MyApp());
+void main() {
+  // to ensure all the widgets are initialized.
+  WidgetsFlutterBinding.ensureInitialized();
+
+  // to initialize the notificationservice.
+  NotificationService().initNotification();
+  runApp(const MyApp());
+}
 
 class MyApp extends StatelessWidget {
   const MyApp({super.key});

lib/pages/scanner_page.dart

@@ -3,6 +3,7 @@ import 'package:mobile_scanner/mobile_scanner.dart';
 import 'package:smoke_cess_app/models/settings.dart';
 import 'package:smoke_cess_app/service/json_service.dart';
 import 'package:smoke_cess_app/service/settings_service.dart';
+import 'package:smoke_cess_app/service/notification_service.dart';
 
 import '../widgets/missing_config_popup.dart';
 
@@ -67,6 +68,7 @@ class ScannerPageState extends State<ScannerPage> {
               textStyle: const TextStyle(fontSize: 20)),
           onPressed: () {
             loadSettingsFromLocalJSON();
+            NotificationService().setAllNotifications();
           },
           child: const Text('Read JSON'),
         )

lib/service/notification_service.dart

@@ -0,0 +1,81 @@
+import 'package:flutter_local_notifications/flutter_local_notifications.dart';
+import 'package:smoke_cess_app/service/date_service.dart';
+import 'package:timezone/timezone.dart';
+
+class NotificationService {
+  static final NotificationService _notificationService =
+      NotificationService._internal();
+
+  factory NotificationService() {
+    return _notificationService;
+  }
+
+  final FlutterLocalNotificationsPlugin flutterLocalNotificationsPlugin =
+      FlutterLocalNotificationsPlugin();
+
+  NotificationService._internal();
+
+  Future<void> initNotification() async {
+    // Android initialization
+    const AndroidInitializationSettings initializationSettingsAndroid =
+        AndroidInitializationSettings('@mipmap/ic_launcher');
+
+    // ios initialization
+    const IOSInitializationSettings initializationSettingsIOS =
+        IOSInitializationSettings(
+      requestAlertPermission: false,
+      requestBadgePermission: false,
+      requestSoundPermission: false,
+    );
+
+    const InitializationSettings initializationSettings =
+        InitializationSettings(
+            android: initializationSettingsAndroid,
+            iOS: initializationSettingsIOS);
+    // the initialization settings are initialized after they are setted
+    await flutterLocalNotificationsPlugin.initialize(initializationSettings);
+  }
+
+  Future<void> setAllNotifications() async {
+    List<TZDateTime> moodDates = await getDatesforMood();
+    List<TZDateTime> sleepDates = await getDatesforSleep();
+    for (var date in moodDates) {
+      setNotification(1, "Mood", "Evaluate your mood", date);
+      print("mood");
+    }
+    for (var date in sleepDates) {
+      setNotification(1, "Sleep", "Evaluate your sleep", date);
+      print("sleep");
+    }
+  }
+
+  Future<void> setNotification(
+      int id, String title, String body, TZDateTime tzDateTime) async {
+    await flutterLocalNotificationsPlugin.zonedSchedule(
+      id,
+      title,
+      body,
+      tzDateTime, //schedule the notification to show after 2 seconds.
+      const NotificationDetails(
+        // Android details
+        android: AndroidNotificationDetails('main_channel', 'Main Channel',
+            channelDescription: "ashwin",
+            importance: Importance.max,
+            priority: Priority.max),
+        // iOS details
+        iOS: IOSNotificationDetails(
+          sound: 'default.wav',
+          presentAlert: true,
+          presentBadge: true,
+          presentSound: true,
+        ),
+      ),
+
+      // Type of time interpretation
+      uiLocalNotificationDateInterpretation:
+          UILocalNotificationDateInterpretation.absoluteTime,
+      androidAllowWhileIdle:
+          true, // To show notification even when the app is closed
+    );
+  }
+}

pubspec.lock

@@ -1,6 +1,13 @@
 # Generated by pub
 # See https://dart.dev/tools/pub/glossary#lockfile
 packages:
+  args:
+    dependency: transitive
+    description:
+      name: args
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.4.0"
   async:
     dependency: transitive
     description:
@@ -99,6 +106,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.0.5"
+  dbus:
+    dependency: transitive
+    description:
+      name: dbus
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.7.8"
   fake_async:
     dependency: transitive
     description:
@@ -132,6 +146,27 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.0.1"
+  flutter_local_notifications:
+    dependency: "direct main"
+    description:
+      name: flutter_local_notifications
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "9.9.1"
+  flutter_local_notifications_linux:
+    dependency: transitive
+    description:
+      name: flutter_local_notifications_linux
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.5.1"
+  flutter_local_notifications_platform_interface:
+    dependency: transitive
+    description:
+      name: flutter_local_notifications_platform_interface
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "5.0.0"
   flutter_test:
     dependency: "direct dev"
     description: flutter
@@ -247,6 +282,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.1.3"
+  petitparser:
+    dependency: transitive
+    description:
+      name: petitparser
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "5.1.0"
   platform:
     dependency: transitive
     description:
@@ -364,6 +406,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "0.4.12"
+  timezone:
+    dependency: "direct main"
+    description:
+      name: timezone
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.8.0"
   typed_data:
     dependency: transitive
     description:
@@ -398,7 +447,14 @@ packages:
       name: xdg_directories
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.0"
+    version: "0.2.0+3"
+  xml:
+    dependency: transitive
+    description:
+      name: xml
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "6.1.0"
 sdks:
   dart: ">=2.18.2 <3.0.0"
   flutter: ">=3.0.0"

pubspec.yaml

@@ -35,6 +35,8 @@ dependencies:
   # The following adds the Cupertino Icons font to your application.
   # Use with the CupertinoIcons class for iOS style icons.
   cupertino_icons: ^1.0.2
+  flutter_local_notifications: ^9.3.1
+  timezone: ^0.8.0
   shared_preferences: ^2.0.17
   audioplayers: ^3.0.1
   mobile_scanner: ^3.0.0