machine.ts

/**
 * Determine if you're on track.
 * Designs
 */

/*
relies on
api/stdudent/transcript // your transscript data as json

{ ""
 */




enum GOB {
    good = 1,
    ok = 0.75,
    bad = 0
}

export function successRate(data: string, factors) {
    var d = JSON.parse(data);

    // for all semesters, add up all credits taken and credits earned.
    var semesterCount = { fall: 0, spring: 0 };
    var credits = 0;
    var totalCredits = d.totalCredits;

    for (var semester in semesterCount) {
        var curSemesters = d.filter((o) => o.semester === semester);
        semesterCount[semester] = curSemesters.length;
        credits += curSemesters.courses.reduce((prev, cur, i) => {
          if (i === 1)
            return Number.parseFloat(prev.credits) + Number.parseFloat(cur.credits);
          return prev + Number.parseFloat(cur.credits)
        });
    }

    // For Graduating on Time

    var weight = 1;
    if ((totalCredits / (semesterCount.fall + semesterCount.spring) < 12))
        weight = 0;
    else
        if ((totalCredits / (semesterCount.fall + semesterCount.spring) <= 15))
            weight = 0.5;

    return weight;
}

export function messureGpa(data: string) {
    var d = JSON.parse(data);

    if (d.cumulativeGpa >= 3.5) return 1;
    if (d.cumulativeGpa >= 3.0) return 0.75;
    if (d.cumulativeGpa >= 2.5) return 0.25;
    if (d.cumulativeGpa < 2.5) return 0;
}

export function standardDev(data: string) {
    var d = JSON.parse(data);

    var sumCredits = 0;
    var sumCreditsEarned = 0;
    d.semesters.map((s) => {
        if (s.semester !== 'summer')
            s.courses.map((c) => {
                sumCreditsEarned += c.creditsEarned;
                sumCredits += c.credits;
            })
    });
    sumCredits *= 4;
    var cumulativeGpa = sumCreditsEarned / sumCredits;

    //calc variance of all term gpas
    var vmap = d.semesters.reduce((prev, cur, i) => {
      if (i === 1)
        return Math.pow(prev.termGpa - cumulativeGpa, 2) + Math.pow(cur.termGpa - cumulativeGpa, 2);
      return prev + Math.pow(cur.termGpa - cumulativeGpa, 2);
    });

    return Math.pow(vmap / (d.semester.length - 1), 0.5);
}

export function checkStd(s) {
  if (s > .35) return GOB.bad;
  if (s <= .2) return GOB.good;
  if (s <= .35) return GOB.ok;
}

export function determineHowGood() {

}