Automatic Document Refresh on the Server Side

Hello! We have created a taxi app in flutter. So far everything is working fine, except for one. How to automatically update a document without flutter on the server side? For example, a taxi driver, when entering the application, presses the online button and can pick up the order. But there is a case where he exits the application without pressing offline. In this case, we should automatically change its status to inactive (offline). Do I need to write a function for this and deploy it to the server?

TL;DR

The user is asking how to automatically update a document on the server side to change the driver status to offline without using Flutter. They suggest using a cloud function to achieve this. Another user suggests creating a heartbeat by having the app update a last ping timestamp every minute, and if the app stops updating that timestamp after a certain period of time, the driver can be considered offline. The user confirms that they have created a taxi app in Flutter and needs a solution for automatically updating the driver's status.

I always suggest creating a sort of heartbeat by having the app update a last ping timestamp every minute or so. If the app stops updating that timestamp after Y minutes, they can be considered offline

Okay, that's understandable. But how then to update the document on the server to change the driver status to offline automatic?