haskell-todo

This project is my first incursion into real-world-ish Haskell. The intention here was to overengineer a toy todo-list webservice to get a glimpse at what it would be like to use Haskell in production.

(Btw, this is by no means production-ready.)

Overall code organization is heavily based on what I've seen working with microservices at Nubank - in a Clojure codebase. I have no idea on how it compares to typical Haskell architectures. I built this mostly by fooling around with the language and striving for decoupling and separation of concerns. I tried write what I think is Good Code, but I may have gotten a few things wrong 😅

I've learned a lot building this simple thing. I've tried to document some of this learning in the modules themselves, in haddock sections. I hope others can learn a lot from this, too :)

Building, testing, running

This project was built with Stack. Normal stack calls should work fine:

# build haskell-todo.exe
stack build

# build and run
stack run

# run tests
stack tests

# start ghci
stack ghci

If you want to play with the code, I suggest running the included ghci.sh script, which loads ghci with both tests and library modules loaded. In that repl you can call:

λ> main -- run all tests
...

λ> HaskellTodo.startApp -- start the app
Server running at port 8080

Once the server is running (from ghci or stack run), you can enter http://localhost:8080/index.html to interact with the API through a very simple web page.

Code for this front end is available here. I'm not very proud of it, but it wasn't really the focus here ¯\_(ツ)_/¯