hopglass/helper.js

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function get(url) {
return new Promise(function (resolve, reject) {
var req = new XMLHttpRequest();
req.open('GET', url);
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req.onload = function () {
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if (req.status == 200) {
resolve(req.response);
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}
else {
reject(Error(req.statusText));
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}
};
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req.onerror = function () {
reject(Error("Network Error"));
};
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req.send();
});
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}
function getJSON(url) {
return get(url).then(JSON.parse);
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}
function sortByKey(key, d) {
return d.slice().sort(function (a, b) {
return a[key] - b[key];
}).reverse();
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}
function limit(key, m, d) {
return d.filter(function (d) {
return d[key].isAfter(m);
});
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}
function sum(a) {
return a.reduce(function (a, b) {
return a + b;
}, 0);
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}
function one() {
return 1;
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}
function trueDefault(d) {
return d === undefined ? true : d;
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}
function dictGet(dict, key) {
var k = key.shift();
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if (!(k in dict)) {
return null;
}
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if (key.length == 0) {
return dict[k];
}
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return dictGet(dict[k], key);
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}
function localStorageTest() {
var test = 'test';
try {
localStorage.setItem(test, test);
localStorage.removeItem(test);
return true;
} catch (e) {
return false;
}
}
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function listReplace(s, subst) {
for (key in subst) {
var re = new RegExp(key, 'g');
s = s.replace(re, subst[key]);
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}
return s;
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}
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/* Helpers working with nodes */
function offline(d) {
return !d.flags.online;
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}
function online(d) {
return d.flags.online;
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}
function has_location(d) {
return "location" in d.nodeinfo &&
Math.abs(d.nodeinfo.location.latitude) < 90 &&
Math.abs(d.nodeinfo.location.longitude) < 180;
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}
function subtract(a, b) {
var ids = {};
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b.forEach(function (d) {
ids[d.nodeinfo.node_id] = true;
});
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return a.filter(function (d) {
return !(d.nodeinfo.node_id in ids);
});
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}
/* Helpers working with links */
function showDistance(d) {
if (isNaN(d.distance)) {
return;
}
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return numeral(d.distance).format("0,0") + " m";
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}
function showTq(d) {
return numeral(1 / d.tq).format("0%");
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}
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/* Infobox stuff (XXX: move to module) */
function attributeEntry(el, label, value) {
if (value === null || value == undefined) {
return;
}
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var tr = document.createElement("tr");
var th = document.createElement("th");
if (typeof label === "string") {
th.textContent = label;
} else {
th.appendChild(label);
tr.className = "routerpic";
}
tr.appendChild(th);
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var td = document.createElement("td");
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if (typeof value == "function") {
value(td);
} else {
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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function createIframe(opt, width, height) {
el = document.createElement("iframe");
width = typeof width !== 'undefined' ? width : '100%';
height = typeof height !== 'undefined' ? height : '350px';
if (opt.src) {
el.src = opt.src;
} else {
el.src = opt;
}
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if (opt.frameBorder) {
el.frameBorder = opt.frameBorder;
} else {
el.frameBorder = 1;
}
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if (opt.width) {
el.width = opt.width;
} else {
el.width = width;
}
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if (opt.height) {
el.height = opt.height;
} else {
el.height = height;
}
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el.scrolling = "no";
el.seamless = "seamless";
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return el;
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}
function showStat(o, subst) {
var content, caption;
subst = typeof subst !== 'undefined' ? subst : {};
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if (o.thumbnail) {
content = document.createElement("img");
content.src = listReplace(o.thumbnail, subst);
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}
if (o.caption) {
caption = listReplace(o.caption, subst);
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if (!content) {
content = document.createTextNode(caption);
}
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}
if (o.iframe) {
content = createIframe(o.iframe, o.width, o.height);
if (o.iframe.src) {
content.src = listReplace(o.iframe.src, subst);
} else {
content.src = listReplace(o.iframe, subst);
}
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}
var p = document.createElement("p");
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if (o.href) {
var link = document.createElement("a");
link.target = "_blank";
link.href = listReplace(o.href, subst);
link.appendChild(content);
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if (caption && o.thumbnail) {
link.title = caption;
}
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p.appendChild(link);
} else {
p.appendChild(content);
}
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return p;
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}