This project pulls data from public Venmo transactions into a force directed graph for the user to explore and play with.
The server side of the app is written in Haskell and deployed to Heroku. A huge thanks is in order for @mietek. Without halycon and his Haskell on Heroku I am not sure if I would have ever gotten this deployed.
The frontend of the app uses BackboneJS and d3js.
If you want to run this application locally, you'll want to first install halcyon:
$ eval "$( curl -sL https://github.com/mietek/halcyon/raw/master/setup.sh )"(You can also install from source if you don't trust eval on random shell scripts from the internet. See https://halcyon.sh/ for more.)
Next, install the app with:
$ halcyon install https://github.com/pcarleton/venwebYou should then be able to run the app by calling venweb from the command line.
If you want to deploy our very own Haskell app, I suggest following @mietek's tutorial.
This project started out as a way for me to try Haskell in a (quasi) practical setting. Previously, I had used Haskell for programming problems. I really loved the functional style (it was punishing at first, but it grew on me), but I had never deployed anything with it.
I took inspiration from this blog post: http://adit.io/posts/2012-03-10-building_a_concurrent_web_scraper_with_haskell.html. An initial version concurrently traversed the transaction graph to build up the network in a single backend request, but I took this behavior out in order to simplify the API.