I think I'm having a misunderstanding of how to implement appwrite messages for push notification.

I've already setup firebase credentials in appwrite, but I'm wondering if my workflow is correct. I've been asking chatgpt and it says I need serverside code to run the kotlin code that is listed in https://appwrite.io/docs/products/messaging/send-push-notifications. In my original understanding, I needed to add all of this logic within the same code base. I feel like I'm missing something based on chatgpt telling me that I need to create a server side function. Maybe I'm missing some fundamental understanding for this push notification architecture that I'm not aware of yet.

Can someone help me understand? Here is the pseudocode for my implementation:

User Registration: Getting a Device Token

Trigger: User successfully completes sign-up in

1. RegistrationPushNotificationHandler() : -Ask the OS for push notification permission using the Firebase Messaging SDK

• If permission is granted, call messaging().getToken()
• account.createPushTarget()
• Save targetId

7. Set up a token refresh listener using messaging().onTokenRefresh()

Trigger: A user sends a message in the group chat

1. A push notification is sent to the topic(appwrite mesages) that matches the chat id

• Because all participants subscribed to the topic in Part 3, sending one message to the topic fans out to all of them automatically Appwrite + FCM handle the fanout
• Call messaging.createPush() (SendMessageNotifHandler.kt) with the payload generated after message

4. The push travels: Appwrite → Google FCM servers → Android device

On the Android device — background/killed state:

1. Android OS wakes MessagingService.kt (which extends FirebaseMessagingService)
2. onMessageReceived(remoteMessage) fires
3. The notification title, body, and chatId are extracted from the payload
4. A system tray notification is built with NotificationCompat.Builder