Automatically ban empty messages

[marinegor]

Hi, we noticed that bot can't neither manually not automatically ban messages that have like a picture with a button below -- in bot logs, marking them with /spam looks like this:

the-bot  | 2025/04/10 09:17:36.828 [DEBUG] {bot/spam.go:131 bot.(*SpamFilter).UpdateSpam} update spam samples with ""
the-bot  | 2025/04/10 09:17:36.828 [DEBUG] {storage/samples.go:130 storage.(*Samples).Add} adding sample: spam, user, ""
the-bot  | 2025/04/10 09:17:36.828 [WARN]  {events/listener.go:287 events.(*TelegramListener).procSuperReply} failed to process direct spam report: failed to update spam for "": can't update spam samples: can't update spam samples: message can't be empty

Which results in two things:

• original spam message stays in chat
• /spam mark stays in chat

Looks like this:

We don't want to disable forwards in general, but certainly want to disable such malicious forwards. Is there any way to do that within the current set of options, or should it be implemented?

[umputun]

Please use discussion for such types of questions or suggestions. Issues here are for real issues, i.e., bug reports.

you can use keyboard check we have added not a long time ago #259

Keyboard check

This option is disabled by default. If --meta.keyboard set or env:META_KEYBOARD is true, the bot will check if the message contains a keyboard (buttons). If the message contains a keyboard, it will be marked as spam.

[marinegor]

thanks -- I didn't think it can be handled with the keyboard check, that's a good suggestion.
Not sure what to do if someone just sends a single image though -- I guess with META_IMAGE_ONLY?

And my bad, discussions aren't yet in the muscle memory -- I'll try to do my best to adhere to that next time.

[umputun]

yep, META_IMAGE_ONLY is exactly for catching those patterns