payghaam_flutter 0.1.2

Payghaam Flutter SDK — identify users, manage subscriptions, set tags, and track events with the Payghaam engagement platform.

payghaam_flutter

Flutter SDK for the Payghaam engagement platform. Identify users, register push/email/SMS subscriptions, set tags, and track events.

See DESIGN.md for architecture and the native-push strategy.

Prerequisites

• Flutter ≥ 3.10.0, Dart SDK ≥ 3.0.0 (>=3.0.0 <4.0.0)
• iOS 15.0+ deployment target
• Android minSdk 21+
• A Payghaam project + SDK-type API key (dashboard → Project → API keys)

Install

dependencies:
  payghaam_flutter: ^0.1.0

Quick start

import 'package:payghaam_flutter/payghaam_flutter.dart';

void main() async {
  await Payghaam.instance.initialize(PayghaamConfig(
    appId: 'YOUR_PROJECT_ID',
    apiKey: 'ek_client_...',          // SDK-type key from the dashboard
    baseUrl: 'https://api.yourhost.com',
  ));

  await Payghaam.instance.login('your-backend-user-id');
  await Payghaam.instance.user.addTag('plan', 'pro');
  await Payghaam.instance.user.addEmail('[e-mail]');
  await Payghaam.instance.trackEvent('purchase', {'sku': 'sku_123'});
}

Enabling push

Push is native on both platforms from this one plugin — iOS → APNs (no Firebase), Android → FCM. There's no platform branch and no firebase_messaging in your app's pubspec.

PayghaamPushProvider is the default, so simply:

final push = PayghaamPushProvider();
await Payghaam.instance.initialize(config, push: push); // or omit push — it's the default
await Payghaam.instance.login('user-id');
await Payghaam.instance.requestPushPermission(); // don't call this at launch — see below

// Enable terminated-state `delivered` receipts (iOS NSE + Android FCM service):
await push.shareConfig(
  appGroup: 'group.com.yourcompany.app.payghaam', // iOS only; Android ignores it
  apiBase: config.baseUrl,
  apiKey: config.apiKey,
  externalId: 'user-id',
);

Defer requestPushPermission() until the user has context for why you're asking — a prompt fired at cold launch gets reflexively denied, and a denial is hard to undo. Call it after onboarding, or right before a feature that needs push (e.g. await Payghaam.instance.requestPushPermission(); right before enabling order-status alerts).

Handling taps and deep links

A campaign's Deep link URL arrives as ek_url, and anything you pass as data on POST /api/notifications arrives alongside it:

Payghaam.instance.onNotificationOpened.listen((payload) {
  // payload['ek_url']   → 'myapp://offers/summer'
  // payload['targetId'] → your own data key
  final target = payload['targetId'];
  if (target is String) navigatorKey.currentState?.pushNamed('/offers/$target');
});

With no subscriber, the SDK opens ek_url itself (ACTION_VIEW on Android, openURL on iOS). Subscribing suppresses that, so routing — including the deep link — is yours. Subscribe right after initialize(); a tap that cold-launched the app waits a short grace period for you before the fallback takes over.

Subscribe via Payghaam.instance.onNotificationOpened, not the provider's stream. Both deliver the same payload, but the SDK's own stream is the public API, and subscribing to it is what tells the SDK you're handling routing.

The scheme must be registered with the OS or nothing opens. A custom scheme like myapp:// is claimed by no app until you declare it — an <intent-filter> on Android (setup) and a URL Type on iOS (setup). Until then the tap opens the app and your listener still fires, but the automatic fallback has nowhere to send it.

Reserved payload keys: ek_message_id, ek_url, ek_image, ek_sound, title, body.

Platform setup:

• iOS — IOS_SETUP.md: capabilities, App Group, Notification Service Extension.
• Android — ANDROID_SETUP.md: add a Firebase project + google-services.json (no firebase_messaging plugin needed).
• Custom sounds — CUSTOM_SOUND.md: bundle a sound file and map the dashboard's Custom sound name to it on each platform.

Identity Verification

If a project enables Identity Verification (dashboard → project → Security), SDK calls referencing an external id must include an HMAC-SHA256 of that id, computed on your server with the project secret:

// hash = HMAC_SHA256(externalId, projectSecret) — computed by YOUR backend
await Payghaam.instance.login('user-id', identityHash: hash);

Never ship the secret in the app.

What maps to the backend

SDK call	Endpoint
login(id)	POST /api/sdk/users
push/email/SMS register	POST /api/sdk/users/:id/subscriptions
user.addTag(s)	PUT /api/sdk/users/:id/tags
trackEvent	POST /api/sdk/events

Auth uses the project SDK key as a bearer token. Use HTTPS in production.

Verify your integration

1. Run the app on a physical device (push needs real APNs/FCM, not a simulator/emulator).
2. Confirm the SDK initialized — pass debug: true in PayghaamConfig for verbose console logging.
3. Check the dashboard (Project → Subscribers) for a new subscriber after login().
4. Send a test push from the dashboard (Project → Campaigns → test send) targeting that subscriber.
5. Confirm it's delivered, and that tapping it fires onNotificationOpened and/or opens the deep link.

Architecture

This plugin is a thin wrapper over the canonical native SDKs (sdks/ios, sdks/android) rather than its own implementation — see DESIGN.md at the repo root for the full design.

• iOS/Android: initialize/login/trackEvent/user.addTag(s)/push registration/receipt reporting all delegate to the native SDK (via a CocoaPods/SPM dependency on iOS, a Gradle composite build on Android), which owns the HTTP client and offline queue. Dart only owns tap dispatch, deep-link fallback, and foreground/session timing — deliberately, so those don't get double-handled by both the native SDK's own machinery and the plugin's.
• Web/desktop: there's no native SDK to delegate to on these platforms (push was never supported there either), so Dart falls back to its own package:http-based client automatically when the native plugin isn't present. That's the one place this SDK still makes its own HTTP calls.