Souplesse

This readme describes what may someday be, not what is today

Reads a GPX file which you generated by cycling around, and tells you interesting(sic) things about it.

The principle we aspire to is that the measurement is subsidary to the ride, not the purpose of the ride. The purpose of the ride is to enjoy cycling, or to see new places, or to get from A to B, and the purpose of Souplesse is to see if we can get any useful numbers out of the riding you were doing anyway without making you do more of it.

So, the general idea is that given some ride data it can tell you how long/how often you spent at a given level of effort (e.g. heart rate), or output (power, speed, cadence, rate of ascent).

Canned views

ride view

graph of (selected variables) / time, with buttons to select variables slider for threshold level all points above threshold are highlighted and interval times above threshold shown zoom in/out on time range show the selected points on a map

calendar view

note this will need some kind of server-side storage so that the system remembers all your gpx files

shows dates that you rode for each ride, show time at effort some kind of slider for effort level

Query view

Not yet decided if this is useful, something that allows graphs of arbitrary functions of properties (e.g. to look at power/cadence ratio, or ... some other weirdness)

Tech notes

Use nix-shell. Inside the shell

• run tests with cabal test --test-show-details=always: if you don't ask for details it won't tell you about incomplete pattern matches

• run the app with cabal run

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Do not look below this line

WIP, Puzzles and TODO

• do we even need Track? will it ever be anything more than a collection of Points?

• can we lose this "if isJust lat && isJust lon && isJust ts" wart?

• probably we should store points in a more efficient form than a singly-linked list

• need a web server in haskell that

• [done] accepts file upload and parses the gpx file
• serves the data points in some format elm can digest easily

• [done] need a database of some kind so the data can be saved
• and boring stuff like auth[zn]
• frontend can get data from backend
• [done] for DX, backend can serve the js files needed by frontend
• [ad hoc] we only have yesod-core, may need other parts as well

Postgres

I run the postgresql devel server using Docker instead of changing my global NixOS configuration, so that it's self-contained and I can start and stop it when I want to

docker run -p 5432:5432 --name souplesse-postgres -e POSTGRES_USER=souplesse  -e POSTGRES_PASSWORD=secret -d postgres
nix-shell -p postgresql --run "psql -h localhost -U souplesse   -p 5432"