jonmcalder / exercism-config-viz

Track config visualizer for exercism.io

Track config visualizer for exercism.io

This is a simple Shiny app for visualizing the config.json files of language tracks on exercism.io.

It utilizes jsonlite to parse the JSON files and the visNetwork package for visualizing the progression of exercises as a network path.

It should be accessable via Shinyapps.io, provided that I haven't reached my usage quota.

Setup/Install

To run it locally, clone this repo and make sure you have installed R and RStudio as well as the following R packages:

• shiny
• jsonlite
• dplyr
• visNetwork
• shinycssloaders

install.packages("shiny")
install.packages("jsonlite")
install.packages("dplyr")
install.packages("visNetwork")
install.packages("shinycssloaders")

Then simply open up the project/directory in RStudio and run shiny::runApp().

Contributing

Please feel free to open an issue or pull request if you encounter problems or would like to contribute fixes/improvements etc.

exercism-config-viz's Issues

Exercism V3 compatability?

Interested to update this to the Exercism V3 spec for the config files?
From time to time I have use cases for which this tool is incredibly useful, but it does no work for the changed schema of the V3 track.

Order of "unlocked_by": null elements determines graph edges _together_ with "unlocked_by": "..."

To specify the issue I mentioned in exercism/r#127 (comment): I'm seeing cycles/loops, for example when I set bob to "unlocked_by": "anagram":

Could there be a bug here somewhere:

exercism-config-viz/server.R

Lines 72 to 76 in e21da67

	from = config$exercises$unlocked_by[!is.na(config$exercises$unlocked_by)] %>%
	c(core_exercises$id[1:nrow(core_exercises) - 1])
	to = config$exercises$slug[!is.na(config$exercises$unlocked_by)] %>%
	c(core_exercises$id[-1])

? Maybe with the is.na()? Does it return a sensible result when the nulls from the JSON are fed into it?