Last active
November 2, 2016 14:45
-
-
Save lieuwex/14ce1da07030461a8159 to your computer and use it in GitHub Desktop.
Grade calculator connected to Magister
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
{ Magister } = require 'magister.js' | |
require! 'kbd' | |
{ group-by, obj-to-pairs, each, map, reject, is-it-NaN } = require 'prelude-ls' | |
WANTED = 5.5 | |
ask = (str) -> | |
process.stdout.write "#str: " | |
kbd.get-line-sync! | |
handle-err = (e) !-> | |
console.log "error: #e" | |
process.exit 1 | |
numberize = (s) -> parse-float s.replace(',', '.'), 10 | |
[schoolname, username, password] = ['Schoolname', 'Username', 'Password'] |> map ask | |
magister = new Magister do | |
schoolname | |
username | |
password | |
e <-! magister.ready | |
handle-err e if e? | |
e, r <-! @current-course | |
handle-err e if e? | |
e, r <-! r.grades do | |
fillPersons: no | |
fillGrade: yes | |
handle-err e if e? | |
r | |
|> group-by (.class!abbreviation) | |
|> obj-to-pairs | |
|> each ([name, grades]) !-> | |
console.log "#name:" | |
input = ask 'Weight of next grade' | |
if input.length is 0 | |
return | |
weight = input |> numberize | |
old-grade-weight-sum = 0 | |
old-weight-sum = 0 | |
grades | |
|> reject (g) -> g.type!type! is 2 | |
|> map (g) -> | |
grade: ( | |
if g.grade!? then g.grade! |> numberize | |
else NaN | |
) | |
weight: g.weight! | |
|> reject (g) -> is-it-NaN g.grade | |
|> each (g) !-> | |
old-grade-weight-sum += g.weight * g.grade | |
old-weight-sum += g.weight | |
calculate-grade = (wanted) -> | |
wanted = 10 if wanted > 10 | |
needed = (wanted * (old-weight-sum + weight) - old-grade-weight-sum) / weight | |
Math.round(10 * needed) / 10 | |
cur-avg = old-grade-weight-sum / old-weight-sum | |
cur-rounded-avg = Math.floor(cur-avg + 0.5) - 0.5 | |
next-avg = Math.ceil(cur-avg - 0.4) + 0.5 | |
console.log "Needed grade for #cur-rounded-avg (stay same): #{calculate-grade cur-rounded-avg}" | |
console.log "Needed grade for #WANTED: #{calculate-grade WANTED}" | |
console.log "Needed grade for #next-avg (go one up): #{calculate-grade next-avg}" | |
console.log "---" |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
@tomsmeding ¯_(ツ)_/¯