PNTA Flutter Plugin #

A Flutter plugin for requesting push notification permissions and handling notifications on iOS and Android with deep linking support.

Table of Contents #

• Installation & Setup
  • iOS Setup
  • Android Setup
• Quick Start Guide
• API Reference
• Complete Example
• Troubleshooting

Installation & Setup #

Add the plugin to your pubspec.yaml:

dependencies:
    pnta_flutter: ^latest_version

Then run:

flutter pub get

iOS Setup #

Update your ios/Podfile with the following configuration:

def flutter_root
  generated_xcode_build_settings_path = File.expand_path(File.join('..', 'Flutter', 'Generated.xcconfig'), __FILE__)
  unless File.exist?(generated_xcode_build_settings_path)
    raise "#{generated_xcode_build_settings_path} must exist. Run `flutter pub get` first."
  end
  File.foreach(generated_xcode_build_settings_path) do |line|
    matches = line.match(/FLUTTER_ROOT\=(.*)/)
    return matches[1].strip if matches
  end
  raise "FLUTTER_ROOT not found. Try deleting Generated.xcconfig and re-running `flutter pub get`"
end

require File.expand_path(File.join('packages', 'flutter_tools', 'bin', 'podhelper'), flutter_root)

flutter_ios_podfile_setup

target 'Runner' do
  use_frameworks!
  use_modular_headers!

  flutter_install_all_ios_pods File.dirname(File.realpath(__FILE__))

  target 'RunnerTests' do
    inherit! :search_paths
  end
end

post_install do |installer|
  installer.pods_project.targets.each do |target|
    flutter_additional_ios_build_settings(target)
  end
end

Android Setup #

1. Firebase Configuration

1. Go to the Firebase Console
2. Create a new project or select an existing one
3. Register your Android app using your package name (e.g., com.example.your_app)
4. Download google-services.json and place it at android/app/google-services.json

2. Gradle Configuration

Project-level android/build.gradle: Add to the buildscript { dependencies { ... } } block:

classpath 'com.google.gms:google-services:4.3.15' // or latest version

App-level android/app/build.gradle: Add at the very bottom:

apply plugin: 'com.google.gms.google-services'

3. AndroidManifest.xml Updates

Add the following to android/app/src/main/AndroidManifest.xml:

<!-- For Android 13+ notification permission -->
<uses-permission android:name="android.permission.POST_NOTIFICATIONS"/>

<!-- For opening external URLs -->
<queries>
  <intent>
    <action android:name="android.intent.action.VIEW" />
    <data android:scheme="http" />
  </intent>
  <intent>
    <action android:name="android.intent.action.VIEW" />
    <data android:scheme="https" />
  </intent>
</queries>

<application>
  <!-- Default notification channel -->
  <meta-data
      android:name="com.google.firebase.messaging.default_notification_channel_id"
      android:value="pnta_default" />

  <!-- Firebase messaging service -->
  <service
      android:name="io.pnta.pnta_flutter.PntaMessagingService"
      android:exported="false">
    <intent-filter>
      <action android:name="com.google.firebase.MESSAGING_EVENT" />
    </intent-filter>
  </service>
</application>

4. MainActivity Setup

Update android/app/src/main/kotlin/.../MainActivity.kt:

import android.content.Intent
import io.flutter.embedding.android.FlutterActivity
import io.pnta.pnta_flutter.NotificationTapHandler

class MainActivity: FlutterActivity() {
    override fun onNewIntent(intent: Intent) {
        super.onNewIntent(intent)
        val extras = intent.extras
        if (extras != null && !extras.isEmpty) {
            val payload = mutableMapOf<String, Any>()
            for (key in extras.keySet()) {
                val value = extras.get(key)
                when (value) {
                    is String, is Int, is Boolean, is Double, is Float, is Long -> payload[key] = value
                    else -> payload[key] = value.toString()
                }
            }
            if (payload.isNotEmpty()) {
                NotificationTapHandler.sendTapPayload(payload)
            }
        }
    }
}

Quick Start Guide #

1. Initialize the Plugin #

Configure the plugin once at app startup:

import 'package:pnta_flutter/pnta_flutter.dart';

void main() async {
  WidgetsFlutterBinding.ensureInitialized();

  await PntaFlutter.initialize(
    autoHandleLinks: true,  // Auto-open links from background notifications
    showSystemUI: false,    // Hide system notification UI when app is in foreground
  );

  runApp(MyApp());
}

2. Setup Navigation Key #

Ensure your MaterialApp uses the global navigator key for deep linking:

MaterialApp(
  navigatorKey: PntaFlutter.navigatorKey, // Required for internal route navigation
  // ... rest of your app
)

3. Request Notification Permission #

final granted = await PntaFlutter.requestNotificationPermission();
if (granted) {
  print('Notification permission granted');
} else {
  print('Notification permission denied');
}

4. Identify Your Device #

Register the device with your PNTA project. There are two ways to call this method:

// Option 1: Simple identification (device token handled internally)
await PntaFlutter.identify('your-project-id', metadata: {
  'user_id': '123',
  'user_email': '[email protected]',
});

// Option 2: Get the device token returned (if you need it for your backend)
final deviceToken = await PntaFlutter.identify('your-project-id', metadata: {
  'user_id': '123',
  'user_email': '[email protected]',
});
if (deviceToken != null) {
  print('Device token: $deviceToken');
  // Store or send to your backend if needed
}

5. Handle Notifications #

Foreground Notifications

PntaFlutter.foregroundNotifications.listen((payload) {
  print('Received foreground notification: ${payload['title']}');

  // Show custom UI (snackbar, dialog, etc.)
  ScaffoldMessenger.of(context).showSnackBar(
    SnackBar(content: Text('${payload['title']}: ${payload['body']}')),
  );

  // Manually handle links if needed
  final link = payload['link_to'] as String?;
  if (link != null && link.isNotEmpty) {
    PntaFlutter.handleLink(link);
  }
});

Background/Terminated Notifications

PntaFlutter.onNotificationTap.listen((payload) {
  print('User tapped notification: ${payload['title']}');

  // Track analytics, show specific screen, etc.
  // Links are auto-handled if autoHandleLinks is true
});

API Reference #

Core Methods #

PntaFlutter.initialize({bool autoHandleLinks, bool showSystemUI})

Initializes the plugin with configuration options.

• autoHandleLinks: Automatically handle link_to URLs when notifications are tapped from background/terminated state
• showSystemUI: Show system notification banner/sound when app is in foreground

PntaFlutter.requestNotificationPermission()

Requests notification permission from the user. Returns Future<bool>.

PntaFlutter.identify(String projectId, {Map<String, dynamic>? metadata})

Registers the device with your PNTA project. Can be called in two ways:

• Without storing token: await PntaFlutter.identify(projectId, metadata: {...})
• With token returned: final token = await PntaFlutter.identify(projectId, metadata: {...})

Returns the device token as Future<String?> if you need it for your own backend or logging.

PntaFlutter.updateMetadata(String projectId, {Map<String, dynamic>? metadata})

Updates device metadata without re-registering. Returns Future<void>.

PntaFlutter.handleLink(String link)

Manually handles a link using the plugin's routing logic.

Properties #

PntaFlutter.navigatorKey

Global navigator key for internal route navigation. Must be assigned to your MaterialApp.

PntaFlutter.foregroundNotifications

Stream of notification payloads received when app is in foreground.

PntaFlutter.onNotificationTap

Stream of notification payloads when user taps a notification from background/terminated state.

Link Handling Rules #

The plugin automatically routes links based on these rules:

• Contains :// (e.g., http://example.com, mailto:[email protected]) → Opens externally via system browser/app
• No :// (e.g., /profile, /settings) → Navigates internally using Flutter's Navigator

Metadata Best Practices #

Store your metadata in one place and use it consistently:

class UserMetadata {
  static Map<String, dynamic> get current => {
    'user_id': getCurrentUserId(),
    'app_version': getAppVersion(),
    'subscription_tier': getSubscriptionTier(),
    'last_active': DateTime.now().toIso8601String(),
  };
}

// Use everywhere
await PntaFlutter.identify('project-id', metadata: UserMetadata.current);
await PntaFlutter.updateMetadata('project-id', metadata: UserMetadata.current);

Simple Example #

import 'package:flutter/material.dart';
import 'package:pnta_flutter/pnta_flutter.dart';

void main() async {
  WidgetsFlutterBinding.ensureInitialized();

  // Initialize plugin
  await PntaFlutter.initialize(
    autoHandleLinks: true,  // Auto-handle links from background taps
    showSystemUI: false,    // Hide system UI in foreground
  );

  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      navigatorKey: PntaFlutter.navigatorKey, // Required for deep linking
      home: HomePage(),
    );
  }
}

class HomePage extends StatefulWidget {
  @override
  _HomePageState createState() => _HomePageState();
}

class _HomePageState extends State<HomePage> {
  @override
  void initState() {
    super.initState();
    _setupNotifications();
  }

  void _setupNotifications() async {
    // Request permission
    final granted = await PntaFlutter.requestNotificationPermission();
    if (!granted) return;

    // Identify device
    await PntaFlutter.identify('your-project-id', metadata: {
      'user_id': '123',
      'user_email': '[email protected]',
    });

    // Listen for foreground notifications
    PntaFlutter.foregroundNotifications.listen((payload) {
      ScaffoldMessenger.of(context).showSnackBar(
        SnackBar(content: Text('Received: ${payload['title']}')),
      );
    });

    // Listen for background notification taps
    PntaFlutter.onNotificationTap.listen((payload) {
      print('User tapped notification: ${payload['title']}');
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text('PNTA Example')),
      body: Center(child: Text('Ready for notifications!')),
    );
  }
}

For a complete working example with all features, see the example/ app in the plugin repository.

Troubleshooting #

Common Issues #

Permission not granted on Android:

• Ensure POST_NOTIFICATIONS permission is in AndroidManifest.xml
• For Android 13+, permission must be requested at runtime

Firebase issues:

• Verify google-services.json is in the correct location
• Check that Firebase project is properly configured
• Ensure Google Services plugin is applied

Deep links not working:

• Verify navigatorKey is assigned to MaterialApp
• Check that routes are properly defined
• For external URLs, ensure <queries> block is in AndroidManifest.xml

iOS build issues:

• Clean and rebuild: flutter clean && flutter pub get
• Update Podfile and run cd ios && pod install

For more examples and advanced usage, see the example/ directory in the plugin repository.