hopglass/helper.js

228 lines
4 KiB
JavaScript

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