Question for learning

[TravisSiebenhaar]

This may or may not be the right place to do this. I have been learning how to program for about 2 months now. Prior to 2 months ago I didn't know anything. So that you know where I am at I feel comfortable with JS/ruby, ajax, sinatra, and building a full CRUD application. I've mainly used bootstrap for front end. I feel that I understand the process of oauth from (client_id, client_secret, callback, tokens, etc). I was wondering if someone could give me a breakdown of what is happening here in this code. From the view, controller (routes), and the before helper method.