student-result.js

if (userIsLoggedIn()) {
    runAddon();
} else {
    console.log('Addon only runs when user is logged in')
}

function runAddon() {

    let table = document.querySelector('table.nb.list.students_results');

    let tableSubHead = table.querySelector('thead > tr.tbsubhead');

    let newTh = document.createElement('th');
    newTh.className = 'tbsubhead';
    newTh.style.textAlign = 'center';
    newTh.innerHTML = 'Ø';

    let tableSubHeadElems = tableSubHead.querySelectorAll('th');

    let tableBody = table.querySelector('tbody');

    for (let tableSubHeadElem of tableSubHeadElems) {
        if (tableSubHeadElem.textContent === 'Status') {
            tableSubHeadElem.parentNode.insertBefore(newTh, tableSubHeadElem);
        }
    }


    for (let element of tableBody.querySelectorAll('tr')) {
        let averageElem = document.createElement('td');
        averageElem.className = 'tbdata';
        averageElem.id = 'test';
        averageElem.style.textAlign = 'center';
        let subElements = element.querySelectorAll('td.tbdata');
        subElements = element.children;
        if (subElements[0].textContent.match(/\d\d-\d\d-\d\d\d\d.*/) && subElements[1].children.length !== 0) {
            subElements[5].style.fontWeight = 'bold';

            let onclick = subElements[1].querySelector('a').getAttribute('onclick');
            let url = onclick
                .replace('javascript: dl_popUp(\'', '')
                .replace('\',\'Ergebnisdetails\',800,600);', '');
            let statusElement = subElements[6];
            myFetch(url, averageElem, element, statusElement);
        } else {
            let emptyElem = document.createElement('td');
            emptyElem.className = subElements[subElements.length - 1].className;
            element.insertBefore(emptyElem, null);
        }
    }

}

function myFetch(url, averageElem, insertParentElem, insertBeforeElem) {
    fetch(url)
        .then(response => response.text())
        .then(data => {
            let href = data.match(/<a href=".*" class="link" title="Notenspiegel">/)[0];
            href = href.replace('popUp', ' dl_popUp')
                .replace('javascript: dl_popUp(\'', '')
                .replace('\')', '')
                .replace('>', ' target="_blank" rel="noopener noreferrer">');

            averageElem.innerHTML = href + '<b>Ø</b>' + '</a>';
            insertParentElem.insertBefore(averageElem, insertBeforeElem);
        })
        .catch(error => console.error('Fehler beim Laden der Daten:', error));
}

function userIsLoggedIn() {
    return document.getElementById('pageHeadBottom_3').querySelector('form') == null;
}