Pidgin 2.13.0 chatrooms not working

[jgknight]

Subject of the Issue

Joining/creating chatrooms on pidgin does not work. There are several things that need to be fixed (I haven't identified all of them unfortunately)

I started working on fixing this in a branch but I'm taking a break from it, so filing this issue to track any progress.
https://github.com/jgknight/retro-aim-server/tree/fix-pidgin-chatrooms

Deployment Environment

• Retro AIM Server Version: ca2b8e5
• Installation Method: built from source on macOS
• Client(s) Used: Pidgin 2.13.0

Steps to Reproduce

In Pidgin, try to create a chatroom or join an invite

Expected Behavior

Client should join the chatroom

Actual Behavior

Nothing happens

Troubleshooting Data

• According to the libpurple source, DetailLevel needs to be 0x02. The client sends 0x01.
• Cookie value needs to match the chatroom name, not a unique uuid. libpurple even uses cookie and chatroom name interchangeably
• Need to update the database schema to store the instance and detail levels for the room

In the pidgin debug logs (pidgin.exe --debug) there are some NULL assertion failures but it's unclear to me why they are happening.

(15:29:28) g_log: serv_got_joined_chat: assertion `name != NULL' failed
(15:29:28) oscar: inside chat_info_update (maxmsglen = 1024, maxvislen = 1024)
(15:29:28) g_log: purple_conversation_get_chat_data: assertion `conv != NULL' failed
(15:29:28) g_log: purple_conv_chat_add_users: assertion `chat != NULL' failed