Smart Notification Manager

Author: Ahmed Wael

Profession: Software Engineer and Flutter Developer Facebook Profile

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Table of Contents

1. Overview

2. Setup Instructions

3. Initialization

   • Local Notifications
   • Push Notifications

4. Examples

   • Basic Notification
   • Scheduled Notification
   • Periodic Notification
   • Push Notification by Token
   • Push Notification by Topic

5. Testing Push Notifications

6. Issues Solved by This Package

---

Overview

The Smart Notification Manager package simplifies notification management in Flutter apps. It supports:

• Local and push notifications.
• Notifications in the foreground, background, and even when the app is killed.
• Advanced features such as scheduled, periodic, and topic-based notifications.

---

Setup Instructions

1. Set up the package:

   dart run smart_notification_manager:setup
   

2. Ensure your app’s battery settings allow it to work without restrictions in a killed state.

---

Initialization

Local Notifications

To initialize local notifications, use the following code in your main.dart file:

LocalNotificationSetup().initialize(
  config: LocalNotificationConfig(
    isWorkInBackground: true, // Enables background notifications.
    isInDebugMode: true, // Displays debug information during development.
    onBgNotifResponse: (details) {}, // Handle background notification response.
    onNotifResponse: (details) {}, // Handle notification response when tapped.
    onError: () {}, // Handle initialization errors.
    onSucess: () {}, // Handle successful initialization.
  ),
);

Push Notifications

To initialize push notifications:

PushNotificationSetup().initialize(
  config: PushNotificationConfig(
    backgroundHandler: (message) async {
      // Handle background push messages.
    },
    foregroundHandler: (message) {
      // Handle foreground push messages.
    },
  ),
);

Note: By default, foreground notifications trigger a basic local notification, while background notifications are handled by Firebase Messaging.

---

Examples

Basic Notification

final result = await LocalNotificationSender().sendNotification(
  LocalNotificationModel(
    isWorkInBackground: true,
    notificationType: NotificationType.basic,
  ),
);

Scheduled Notification

final result = await LocalNotificationSender().sendNotification(
  LocalNotificationModel(
    isWorkInBackground: true,
    notificationType: NotificationType.schedule,
    date: Date(year: 2025, month: 5, day: 21, hour: 16, minute: 5),
  ),
);

Periodic Notification

final result = await LocalNotificationSender().sendNotification(
  LocalNotificationModel(
    isWorkInBackground: true,
    notificationType: NotificationType.peroidic,
    repeatInterval: NotifierRepeatInterval.everyMinute,
  ),
);

Cancel Notifications

  await NotificationCancellerImpl().cancelById(
    NotifierCancellerModel(
      id : 0,
      isInBackground : false,
      onFailure : (String error) {
        print(error);
      },
      onSuccess : () {
        print("Notification Canceled Successfuly");
      }
  )
);

### Push Notification by Token

```dart
await PushNotificationSender().sendNotification(
  PushNotificationModel(
    json: _getServiceAccountJson,
    projectId: getProjectId,
    title: "Hello",
    body: "Ahmed",
    token: getToken,
    type: PushNotificationType.byToken,
  ),
);

Push Notification by Topic

First, subscribe to the topic:

Topic.subscribeToTopic("all");

Then, send a notification:

await PushNotificationSender().sendNotification(
  PushNotificationModel(
    json: _getServiceAccountJson,
    projectId: getProjectId,
    title: "Hello",
    body: "Ahmed",
    topic: "all",
    type: PushNotificationType.byTopic,
  ),
);

Note: Use UserToken.getToken() to retrieve the user token. Obtain the service account JSON and project ID from your Firebase project.

---

Testing Push Notifications

To test push notifications using Postman:

1. Obtain the server key:

   final serverKey = await ServerKeyGetter.getServerKey(serviceAccountJson);
   

2. Configure Postman:

   • Authorization: Use the Bearer token with the server key.

   • Body: Use the following JSON structure:

     {
       "message": {
         "token": "your_device_token",
         "notification": {
           "title": "Sample Title",
           "body": "Sample Body",
           "image": "https://example.com/image.jpg"
         },
         "android": {
           "notification": {
             "sound": "custom_sound", 
             "channel_id": "channel_id"
           }
         }
       }
     }
     

Note: Ensure the sound file is in the res/raw folder and matches the channel_id in your local notification configuration.

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Issues Solved by This Package

• Handles scheduled notifications with correct timezone support.
• Resolves notification sound issues in release builds.
• Supports custom sounds for push notifications.
• Prevents resource removal (e.g., sound files) during release builds.