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example.html
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<!DOCTYPE html>
<html>
<head>
<title>Resource Request Allocation</title>
<script src="munkres.js" type="text/javascript"></script>
<script type="text/javascript">/*<![CDATA[*/
const data = [
{
id: 'resource-1',
name: 'Alice',
rrs: [
{
rrId: 'rr1',
weight: -50
},
{
rrId: 'rr2',
weight: -10
},
{
rrId: 'rr3',
weight: -5
}
]
},
{
id: 'resource-2',
name: 'Bob',
rrs: [
{
rrId: 'rr1',
weight: -11
},
{
rrId: 'rr2',
weight: -20
},
{
rrId: 'rr3',
weight: -5
}
]
},
{
id: 'resource-3',
name: 'Charlie',
rrs: [
{
rrId: 'rr1',
weight: -50
},
{
rrId: 'rr2',
weight: -30
},
{
rrId: 'rr3',
weight: -5
}
]
},
{
id: 'resource-4',
name: 'Danielle',
rrs: [
{
rrId: 'rr1',
weight: -5
},
{
rrId: 'rr2',
weight: 0
},
{
rrId: 'rr3',
weight: -5
}
]
}
];
document.addEventListener('DOMContentLoaded', function() {
const table = document.getElementById('resource-table');
preFilterByThreshold();
makeSquare();
createResourceRequestRow(table);
createResourceRows(table);
update();
});
function preFilterByThreshold() {
const numberOfRRs = getResourceRequests().length;
for (let i=0; i<numberOfRRs; i++) {
let maxWeight = 0;
data.forEach(resource => {
const weight = resource.rrs[i].weight;
if (weight < maxWeight) {
maxWeight = weight;
}
});
if (maxWeight > threshold) {
removeResourceRequest(i);
}
}
}
function removeResourceRequest(idx) {
console.log("Remove rr", idx);
getResources().forEach(resource => {
resource.rrs.splice(idx, 1);
});
}
function makeSquare() {
let numberOfResources = getResources().length,
numberOfRRs = getResourceRequests().length;
for (;numberOfResources < numberOfRRs; numberOfResources++) {
createDummyResource();
}
for (;numberOfResources > numberOfRRs; numberOfRRs++) {
createDummyRR();
}
}
function createDummyResource() {
data.push({name: 'Dummy'});
}
function createDummyRR() {
data.forEach(resource => {
resource.rrs.push({rrId: 'Dummy', weight: 0});
});
}
function createResourceRequestRow(table) {
const tr = document.createElement('tr'),
td = document.createElement('td');
tr.appendChild(td);
getResourceRequests().forEach(rr => {
const td = document.createElement('td');
td.innerText = rr.rrId;
tr.appendChild(td);
});
table.appendChild(tr);
}
function getResourceRequests() {
return data[0].rrs;
}
function getResources() {
return data;
}
function createResourceRows(table) {
getResources().forEach((resource, idx) => {
const tr = document.createElement('tr'),
td = document.createElement('td');
td.innerText = resource.name;
tr.appendChild(td);
resource.rrs.forEach((rr, rrIdx) => {
const td = document.createElement('td');
const input = document.createElement('input');
td.setAttribute('id', 'tab-' + rrIdx + '-' + idx);
input.setAttribute('type', 'text');
input.addEventListener('change', update);
input.value = rr.weight;
td.appendChild(input);
tr.appendChild(td);
});
table.appendChild(tr);
});
}
function getMatrix() {
var matrix = [], N = getResources().length;
for (var i = 0; i < N; ++i) {
matrix[i] = [];
for (var j = 0; j < N; ++j) {
matrix[i][j] = parseInt(document.getElementById('tab-' + i + '-' + j).children[0].value) || 0;
}
}
return matrix;
}
function update() {
const matrix = getMatrix();
const indices = solve(matrix);
postFilterByThreshold(matrix, indices);
highlightSolution(matrix, indices);
}
function highlightSolution(matrix, indices) {
let totalCost = 0;
removeClass();
for (var k = 0; k < indices.length; ++k) {
var i = indices[k][0], j = indices[k][1];
totalCost += matrix[i][j];
document.getElementById('tab-' + i + '-' + j).className = 'active';
}
document.getElementById('total-cost').value = totalCost;
document.getElementById('indices').value = formatIndicesAsString(indices);
}
function removeClass() {
const N = getResources().length;
for (var i = 0; i < N; ++i) {
for (var j = 0; j < N; ++j) {
document.getElementById('tab-' + i + '-' + j).className = '';
}
}
}
function solve(matrix) {
return new Munkres().compute(matrix);
}
function formatIndicesAsString(indices) {
return indices.map(ind => {
return [ '[', ind.join(','), ']' ].join('');
}).join(', ');
}
/*]]>*/</script>
<style>/*<![CDATA[*/
.active {
background-color: #e77;
}
#indices {
min-width:15em;
}
/*]]>*/</style>
</head>
<body>
<h1>Resource Allocation Using Hungarian Method</h1>
<p>
Total Cost: <input disabled id="total-cost" />
</p>
<p>
Indices: <input disabled id="indices" />
</p>
<table id="resource-table"></table>
</body>
</html>