Spam prevention

[tinywombat765]

Summary

Help prevent spam messages from getting forwarded to IRC.

Background

Is your feature request related to a problem? Please describe:
We've been getting a lot of spam messages in #rit-foss recently from the telegram end. The captcha bot deleted the spam messages on the telegram end but they still end up in IRC.

Describe the solution you'd like:
A solution proposed by Repkam09 was to have teleirc not forward a user's messages until they complete the captcha.

Describe alternatives you've considered:
Alternatively, teleirc could hold back messages from new users for a short time and drop them if the user leaves.

Details

I'm not familiar with the workings or teleirc so I don't know how viable these suggestions are. I imagine the second one would be easier since it wouldn't require Integration with another bot.

Outcome

Reduce spam in IRC.

[Tjzabel]

Hmm... This is definitely a hard issue to solve. We can try to look at message metadata on Telegram's side and see if there is a way to tell if a user has completed the captcha or not.

The second alternative seems a bit iffy to me, since a new user coming into the TG group would want assistance, and be confused as to why they are being ignored if they join in the middle of a conversation. I feel it could possibly work if we have like a 5 minute timer to when a message can be sent into the channel. So basically:

1. check if a user has joined more than 5 mins ago
2. If this is not the case, go in a loop and wait until the statement is true.
3. At that point, make sure the user is still in the TG group, and then send the message to IRC.

[jwflory]

Looking through the issue backlog, this is a duplicate of issue #327. Closing this issue in favor of unifying the discussion there.