147 lines
2.5 KiB
JavaScript
147 lines
2.5 KiB
JavaScript
function get(url) {
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return new Promise(function(resolve, reject) {
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var req = new XMLHttpRequest();
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req.open('GET', url);
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req.onload = function() {
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if (req.status == 200) {
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resolve(req.response);
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}
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else {
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reject(Error(req.statusText));
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}
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};
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req.onerror = function() {
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reject(Error("Network Error"));
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};
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req.send();
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});
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}
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function getJSON(url) {
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return get(url).then(JSON.parse)
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}
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function sortByKey(key, d) {
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return d.slice().sort( function (a, b) {
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return a[key] - b[key]
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}).reverse()
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}
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function limit(key, m, d) {
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return d.filter( function (d) {
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return d[key].isAfter(m)
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})
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}
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function sum(a) {
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return a.reduce( function (a, b) {
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return a + b
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}, 0)
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}
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function one() {
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return 1
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}
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function trueDefault(d) {
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return d === undefined ? true : d
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}
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function dictGet(dict, key) {
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var k = key.shift()
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if (!(k in dict))
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return null
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if (key.length == 0)
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return dict[k]
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return dictGet(dict[k], key)
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}
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function localStorageTest() {
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var test = 'test'
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try {
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localStorage.setItem(test, test)
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localStorage.removeItem(test)
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return true
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} catch(e) {
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return false
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}
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}
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/* Helpers working with nodes */
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function offline(d) {
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return !d.flags.online
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}
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function online(d) {
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return d.flags.online
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}
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function has_location(d) {
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return "location" in d.nodeinfo
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}
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function subtract(a, b) {
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var ids = {}
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b.forEach( function (d) {
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ids[d.nodeinfo.node_id] = true
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})
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return a.filter( function (d) {
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return !(d.nodeinfo.node_id in ids)
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})
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}
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/* Helpers working with links */
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function showDistance(d) {
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if (isNaN(d.distance))
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return
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return (new Intl.NumberFormat("de-DE", {maximumFractionDigits: 0}).format(d.distance)) + " m"
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}
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function showTq(d) {
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var opts = { maximumFractionDigits: 0 }
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return (new Intl.NumberFormat("de-DE", opts).format(100/d.tq)) + "%"
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}
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function linkId(d) {
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var ids = [d.source.node.nodeinfo.node_id, d.target.node.nodeinfo.node_id]
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return ids.sort().join("-")
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}
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/* Infobox stuff (XXX: move to module) */
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function attributeEntry(el, label, value) {
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if (value === null || value == undefined)
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return
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var tr = document.createElement("tr")
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var th = document.createElement("th")
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th.textContent = label
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tr.appendChild(th)
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var td = document.createElement("td")
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if (typeof value == "function")
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value(td)
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else
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td.appendChild(document.createTextNode(value))
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tr.appendChild(td)
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el.appendChild(tr)
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return td
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}
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