We are playing here to better understand the idea of having a hybrid application stack:
- Dynamic programming language for 'front-end' (Javascript, Ruby)
- (Strict) functional language for application logic (Haskell)
- Postgres: stored functions written in PL/pgSQL for a JSON data backend.
We believe that this could be a combination leveraging the best of the different languages at the right level. Particularly implementing business logic in a strict and formal way could eliminate a huge set of errors.
Using Sublime Text 2 with SublimeHaskell and SublimeREPL.
To make SublimeREPL use stack ghci, monkey patching of SublimeREPL/config/Haskell/Main.sublime-menu was necessary.
We want to investigate an architecture with a dedicated application logic layer, as opposed to classical approaches, where application logic is often found mixed with rendering. Instead we seek for a solution where all data is derived from the current application state in a more formal way.
In a dense form application state could be considered a tuple of User x Page,
which then would be unfolded into an extended application state considering permissions,
actual data and possible actions, for instance.
There could be two pages:
- Dashboard: showing a list of documents,
- Document: showing a single document for editing or reading,
And three roles:
- Guest
- Dashboard: sees a list of publicly available posts
- Reader: can open published documents for reading
- User
- Dashboard: see their own and those where they are contributing
- Editor: can open documents
- Administrator
- Dashboard: can see users and documents but not only for adminstrative