Exports grades from your student blackboard grade center

bb-grades-export.js

(function(){

let doc = document;
if (doc.querySelector('iframe#mybbCanvas')) {
	doc = doc.querySelector('iframe#mybbCanvas')
		.contentDocument.querySelector('iframe#right_stream_mygrades')
		.contentDocument;
}

let download = function(title, text) {
	let a = doc.createElement("a");
	a.href = 'data:text/plain;charset=utf-8,' + encodeURIComponent(text);
	a.download = title;
	doc.body.appendChild(a);
	a.click();
	doc.body.removeChild(a);
}

let toCSV = array => array.map(row => row.map(cell =>
	cell.indexOf(',') ?
	'"' + cell.replace('"', '""') + '"' :
	cell
)).join('\n');

let reShouldDl = new RegExp("^https?://[^.]+\.blackboard\.com/.+/gradebook/notesAndFeedback/");

let table = [['Item', 'Due Date', 'Points', 'Maximum', 'Comments']];
doc.querySelectorAll("#grades_wrapper > .row").forEach(function(row) {
	let nodeTitle = row.querySelector('.gradable a') || row.querySelector('.gradable').childNodes[0];
	let title = (nodeTitle.innerText || nodeTitle.nodeValue).trim();

	let elemDueDate = row.querySelector('.gradable .activityType');
	let dueDate = !elemDueDate ? '' : !elemDueDate.innerText.startsWith('DUE: ') ? '' : elemDueDate.innerText.slice(5);

	let grade = row.querySelector('.grade .grade').innerText;

	let elemMax = row.querySelector('.grade .pointsPossible')
	let max = !elemMax ? '' : elemMax.innerText.slice(1);

	let elemComment = row.querySelector('.grade .grade-feedback');
	let comment = '';
	if (elemComment) {
		let onclick = elemComment.getAttribute('onclick');
		let html = eval('[' + onclick.slice(onclick.indexOf('(')+1, -2) + ']')[1];

		let el = doc.createElement( 'html' );
		el.innerHTML = html;

		p = doc.createElement('p');
		p.innerHTML = el.querySelector('.vtbegenerated').textContent;

		comment = p.innerText.trim();

		el.querySelectorAll('a').forEach(a => reShouldDl.test(a.href) ? a.click() : 0);
	}

	table.push([title, dueDate, grade, max, comment]);
});

let title = doc.querySelector('.detail-heading .context').innerText + '.csv'

console.log(table);

download(title, toCSV(table));

})();