How to detect if a player uses my mod?

[DimChig]

Hello everyone, i am a beginner mod developer, and i made a client-sided mod for a multiplayer server. 
And i was wondering, can i add a feature, that shows other players, that uses my mod? 
Like in lunar client, you can see a tiny logo near a player name.

I don't know, how can it be realised (maybe put some information in player entity, like nbt, that others mod users can read), please help!

[DimChig]

  On 7/4/2022 at 9:55 AM, diesieben07 said:

This requires the server to have support for your mod in some fashion so that it can forward this information.

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Oh, i see. Thanks

[DimChig]

I figured out how to do this by myself, so I will post it here for everybody.

So basically what I did is I created a RestApi with python, and a database on mysql.
Than on ServerJoinEvent (and once in 5 minutes in-game) i send a query to my restapi (like domain/userTick?=[uuid, player_name]), that's adding a row to my table.
And every player also every 5 minutes requests a query (like domain/getActiveUsers), that returns all rows in database where TIMEDIFF <= 5 minutes.

So than i just change tab list and display name of every player that is in my ActiveUsers list. It is a little bit tricky, but works well enough! No server support needed!
 

[warjort]

You need to get people's informed permission to collect data about them.

And having an open rest endpoint that anybody can query isn't good either (even if the data might seem trivial).

[DimChig]

  On 7/12/2022 at 9:03 PM, warjort said:

You need to get people's informed permission to collect data about them.

And having an open rest endpoint that anybody can query isn't good either (even if the data might seem trivial).

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Well, i guess you can add text to mcmod.info, but actually nobody cares) If you using a mod and see other players with same mod, it must have some kind of data collection

And also nobody sees what queries are sent to api, so they can't abuse it if done correctly

Edited July 13, 2022 by DimChig