bookmarklet-tuwel-matrfilter.js

javascript:(function() {
	var notEls = [];

	function _handleInput(complement) {
		var input = window.prompt('Insert matriculation numbers', '');
		var numbers = input.split(/[^0-9]+/);

		numbers = numbers.map(function(n) {
			if(n.length == 7) {
				return '0' + n;
			} else {
				return n;
			}
		});

		var els = document.querySelectorAll('td.idnumber');
		els = Array.prototype.filter.call(els, function(el) { 
			var idx = numbers.indexOf(el.innerHTML.trim())
			if(idx >= 0) {
				numbers.splice(idx, 1);
			}

			if((complement && idx < 0) || (!complement && idx >= 0)) {
				return true;
			}
			
			return false;
		}).map(function(el) {return el.parentElement;});

		return [els, numbers];
	}

	function doAsk() {
		dont();
		var x = _handleInput(true);
		notEls = x[0];
		if(x[1].length) {
			alert('The following matriculation numbers are not int this list: ' + x[1]);
		}
		_do();
	}

	function download() {
		var x = _handleInput(false);
		var els = x[0];
		if(x[1].length) {
			alert('The following matriculation numbers are not int this list: ' + x[1]);
		}
		
		var files = els.map(function(el) {
			return el.querySelector('a[href*=submission_file]').href;
		});

		for(var i = 0; i < files.length; i++) {
			if(!window.open(files[i], '_blank')) {
				alert('Popups blocked. Please allow them and try again :)');
				break;
			}
		}
	}

	function _do() {
		notEls.forEach(function(el) { el.classList.add('hidden'); });
	}

	function dont() {
		// notEls.forEach(function(el) { el.classList.remove('hidden'); });
		var also = document.querySelectorAll('tr.hidden');
		// console.log(also.length);
		also.forEach(function(el) { el.classList.remove('hidden'); });
	}

	var div = document.createElement('div');
	div.innerHTML = 'Matr. Nummern:';
	div.id = 'evc-super-filter';
	div.classList.add('initialbar');

	var doLink = document.createElement('a');
	doLink.innerHTML = 'Filtern (mit letzem Input) &nbsp; | '

	var doAskLink = document.createElement('a');
	doAskLink.innerHTML = ' &nbsp; Filtern (neuer Input) &nbsp; | '

	var downloadLink = document.createElement('a');
	downloadLink.innerHTML = ' &nbsp; Download &nbsp; | ';

	var resetLink = document.createElement('a');
	resetLink.innerHTML = ' &nbsp; Reset';

	div.appendChild(doLink);
	div.appendChild(doAskLink);
	div.appendChild(downloadLink);
	div.appendChild(resetLink);

	doLink.onclick = _do;
	doAskLink.onclick = doAsk;
	downloadLink.onclick = download;
	resetLink.onclick = dont;

	var table = document.querySelector('.gradingtable');
	table.insertBefore(div, table.firstChild);
})()