Chat with mysql database and private/group conversations

[allw...@gmail.com]

Please look at this question on StackOverflow:
http://stackoverflow.com/questions/28937843/symfon2-clankbundle-simple-private-and-group-chat-database-shcema-and-logi

It's about creating a basic chat with a mysql database and one-to-one conversations (if possible even group-conversations).

Any tutorial or advice about the structure/logic of the app?