Update 'Feature: Room State Management'

Feature%3A-Room-State-Management.md

@@ -10,6 +10,21 @@ Listen to Matrix event for when users enter and leave rooms. This is easily acco
 
 The bot does not get membership events from other users when leaving a room. Instead, it will get a member event of leaving the room for itself. In that circumstance, it should delete all user information in the database for the room.
 
+RoomInfo struct is created/updated when the bot joins a room.
+
 ## Database Changes
 
-New DB object `Rooms`. Trees for room -> list of users, and maybe user -> list of rooms. We need user -> list of rooms for easy implementation of private conversation command execution.
+New DB object `Rooms`. Keep track of users and the rooms they are in, both by username to a list of room IDs, and a room ID to list of usernames. It will also keep track of actual room information.
+
+Trees:
+* username -> list of room ids, for easy implementation of private conversation command execution.
+* room id -> list of users
+* room id -> RoomInfo
+
+## Architcture Changse
+
+A new `RoomInfo` struct must be created, and possibly a whole new layer of the application. This layer doesn't exist yet, because we've been dealing only with strings and integers so far.
+
+RoomInfo must store at least:
+* Room ID
+* Room name