Auto-close help thread if OP leaves server

[mikerasch]

Overview

Closes #480
When a user leaves the server, their help thread stays open. This leads to not only the waste of moderators' time when, but also leads to helpers contributing to nobody.

Details

• Store users in a database upon creation. Storing user id, thread id, and date it was created.
• When the user leaves the guild, inform the channel that it will be closed.
• Archive all thread channels made by the user.
• Every 30 days, purge the database of all thread creation entities.

[CLAassistant]

All committers have signed the CLA.

[marko-radosavljevic]

Thank you for your contribution, and welcome to the project! ☺️ ❤️

[Zabuzard]

(you can use interactive git rebase to change the author btw, not a big deal though)

[Taz03]

I think, u misread the problem. We want to close the help thread if the user leaves not delete it

[mikerasch]

I think, u misread the problem. We want to close the help thread if the user leaves not delete it

Fixed 👍 For some reason, I didn't think about archiving the thread and my mind just went to delete. Thanks for letting me know :)

[Taz03]

also y clear db after every 7 days y not remove each thread when it gets closed

[mikerasch]

also y clear db after every 7 days y not remove each thread when it gets closed

Eventually, the database will require a complete purge regardless. I feel like it would help ease the transactions done in the DB if it were to only purge every 30 days. Also, note the database will also be used for other purposes so I think keeping it saved for 30 days would have no harm.

Also, we need to take into account that any user is able to re-open the thread after it was closed which would complicate the process. I see no easy way to store the re-opened thread.