task.md

Indogram Project Requirements

Act as an Android Kotlin engineer. Create a production-ready Android WebView application for our chat app with the following requirements:

1. Architecture & WebView Configuration:

• Configure a modern WebView with JavaScript enabled, DomStorage enabled, and Database enabled.
• Attach a WebChromeClient with onPermissionRequest overridden to automatically grant android.webkit.PermissionRequest.RESOURCE_AUDIO_CAPTURE and RESOURCE_VIDEO_CAPTURE for WebRTC audio/video calls.
• Ensure the WebView user agent includes "IndoGramAndroid" tag for environment detection.

2. JavaScript Interface Bridge:

• Add a JavascriptInterface named "AndroidBridge" with the following methods:
  • getFCMToken(): returns the cached Firebase Cloud Messaging registration token as a String.
  • onUserLoggedIn(userId: String, phone: String, extraJson: String): stores the active logged-in user state.
  • onUserLoggedOut(): clears native user sessions and unregisters token if needed.
  • onCallStateChanged(state: String, callDataJson: String): handles incoming/outgoing call notifications.
  • showNotification(title: String, body: String, payloadJson: String): shows an Android native status bar notification.

3. Firebase Cloud Messaging (FCM):

• Implement FirebaseMessagingService (onNewToken and onMessageReceived).
• On new token, pass the token into the WebView via evaluateJavascript("window.setDeviceFCMToken('$token')").
• In onMessageReceived, build and display a standard Android Notification with NotificationCompat.Builder (using NotificationChannel on Android 8.0+).
• Attach a PendingIntent to the notification with a target "chatId" extra.
• When the user taps the notification, the MainActivity should launch and call: evaluateJavascript("window.onAndroidNotificationClick('$chatId')", null).

4. Runtime Permissions:

• Request POST_NOTIFICATIONS (Android 13+), CAMERA, and RECORD_AUDIO at runtime before initiating calls.