There are many ways to do it. Basically you need to store posts and display them in a nested format, meaning that you should pull down the data and then nest it

There are many ways to do it. Basically you need to store posts and display them in a nested format, meaning that you should pull down the data and then nest it based on child-parent relationships. I wrote something similar in golang. An example is http://askgolang.com/ http://askgolang.com/ and the package itself with demo code is at https://github.com/carbocation/go.graf https://github.com/carbocation/go.graf Of course, this can be done in any language, but I found to quite pleasant (and safe).