Raw Source Toggle Dropdown

• Minified Source

Henney / DTU grade average

// ==UserScript==
// @name        DTU grade average
// @namespace   dtu
// @description Displays grade average on DTU Inside
// @include     https://cn.inside.dtu.dk/cnnet/Grades/Grades.aspx
// @version     1.1
// @grant       none
// ==/UserScript==

var table = document.getElementsByClassName('gradesList');

var td = table[0].rows[0].insertCell();
td.appendChild(document.createTextNode('Rolling average'));

var totalGrades = 0;
var totalWeightedGrades = 0;
var totalWeight = 0;
var totalAmount = 0;

for (var i = table[0].rows.length - 1; i > 0; i--) {
	var row = table[0].rows[i];
	var grade = row.cells[2].innerText;
	var weight = row.cells[3].innerText;
	
	var gradeInt = parseInt(grade.substr(0, grade.indexOf('(') - 1));
	if (!isNaN(gradeInt)) {
		var weightFloat = parseFloat(weight);
		
		totalGrades += gradeInt;
		totalWeightedGrades += gradeInt * weightFloat;
		totalWeight += weightFloat;
		totalAmount++;
	}
	
	var td = table[0].rows[i].insertCell();
	td.appendChild(document.createTextNode(Math.round(totalWeightedGrades / totalWeight * 100) / 100));
}

var tr = table[0].insertRow();
var td = tr.insertCell();
td.appendChild(document.createTextNode('Average'));
var td = tr.insertCell();
td.appendChild(document.createTextNode(Math.round(totalGrades / totalAmount * 100) / 100));

var tr = table[0].insertRow();
var td = tr.insertCell();
td.appendChild(document.createTextNode('Weighted average'));
var td = tr.insertCell();
td.appendChild(document.createTextNode(Math.round(totalWeightedGrades / totalWeight * 100) / 100));