Fernuni Psychology Point Calculator

run.js

function getQuestionPoints(number, highlight) {
  var question = document.getElementsByClassName("content")[number - 1];

  var rightAnswer = question.getElementsByClassName("rightanswer")[0].innerText;
  var answers = question.getElementsByClassName("answer")[0];

  var answerMap = {};
  for (var i = 0; i < answers.children.length; ++i) {
    var child = answers.children[i];

    answerMap[child.children[1].innerText] = child.children[0].checked;
  }

  return Object.keys(answerMap).reduce(function(points, answer, index) {
    var isRightAnswer = rightAnswer.indexOf(answer.substring(3)) !== -1;

    if (isRightAnswer === answerMap[answer]) {
      points += 1;
    }

    if (highlight && isRightAnswer && !answerMap[answer]) {
      var label = answers.children[index].children[1]
      
      label.style.color = "red";
      for (var i = 0; i < label.children.length; ++i) {
       label.children[i].style.color = "red"
      }
    }

    return points;
  }, 0);
}

function getTotalPoints(count, highlight) {
  var total = 0;

  for (var i = 1; i <= count; ++i) {
    total += getQuestionPoints(i, highlight);
  }

  return total;
}

function run(highlight) {
  var count = document.getElementsByClassName("answer").length;
  var points = getTotalPoints(count, highlight);
  var totalPoints = count * 5;

  alert(
    "Punkte: " +
      points +
      "/" +
      totalPoints +
      "\nBewertung: " +
      (points / (count / 2)).toLocaleString("de") +
      "/10 (" +
      (points / (count / 20)).toLocaleString("de") +
      "%)"
  );
}

run(true);